/* vi: set sw=4 ts=4: */ /* * Busybox main internal header file * * Based in part on code from sash, Copyright (c) 1999 by David I. Bell * Permission has been granted to redistribute this code under GPL. * * Licensed under GPLv2, see file LICENSE in this source tree. */ #ifndef LIBBB_H #define LIBBB_H 1 #include "platform.h" #include #include #include #include #include #include #include #include #include #if defined __UCLIBC__ /* TODO: and glibc? */ /* use inlined versions of these: */ # define sigfillset(s) __sigfillset(s) # define sigemptyset(s) __sigemptyset(s) # define sigisemptyset(s) __sigisemptyset(s) #endif #include #include #include #include #include #include /* There are two incompatible basename's, let's not use them! */ /* See the dirname/basename man page for details */ #include /* dirname,basename */ #undef basename #define basename dont_use_basename #include #include #include #include #include #include #include #include #if !defined(major) || defined(__GLIBC__) # include #endif #include #include #include #include #include #include #if ENABLE_FEATURE_SHADOWPASSWDS # if !ENABLE_USE_BB_SHADOW /* If using busybox's shadow implementation, do not include the shadow.h * header as the toolchain may not provide it at all. */ # include # endif #endif #if defined(ANDROID) || defined(__ANDROID__) # define endpwent() ((void)0) # define endgrent() ((void)0) #endif #ifdef HAVE_MNTENT_H # include #endif #ifdef HAVE_SYS_STATFS_H # include #endif /* Don't do this here: * #include * Some linux/ includes pull in conflicting definition * of struct sysinfo (only in some toolchanins), which breaks build. * Include sys/sysinfo.h only in those files which need it. */ #if ENABLE_SELINUX # include # include #endif #if ENABLE_FEATURE_UTMP # if defined __UCLIBC__ && ( \ (UCLIBC_VERSION >= KERNEL_VERSION(0, 9, 32) \ && UCLIBC_VERSION < KERNEL_VERSION(0, 9, 34) \ && defined __UCLIBC_HAS_UTMPX__ \ ) || ( \ UCLIBC_VERSION >= KERNEL_VERSION(0, 9, 34) \ ) \ ) # include # elif defined __UCLIBC__ # include # define utmpx utmp # define setutxent setutent # define endutxent endutent # define getutxent getutent # define getutxid getutid # define getutxline getutline # define pututxline pututline # define utmpxname utmpname # define updwtmpx updwtmp # define _PATH_UTMPX _PATH_UTMP # else # if !defined(__FreeBSD__) # include # else # define _PATH_UTMPX "/var/run/utx.active" # endif # include # if defined _PATH_UTMP && !defined _PATH_UTMPX # define _PATH_UTMPX _PATH_UTMP # endif # endif #endif #if ENABLE_LOCALE_SUPPORT # include #else # define setlocale(x,y) ((void)0) #endif #ifdef DMALLOC # include #endif /* Just in case libc doesn't define some of these... */ #ifndef _PATH_PASSWD #define _PATH_PASSWD "/etc/passwd" #endif #ifndef _PATH_GROUP #define _PATH_GROUP "/etc/group" #endif #ifndef _PATH_SHADOW #define _PATH_SHADOW "/etc/shadow" #endif #ifndef _PATH_GSHADOW #define _PATH_GSHADOW "/etc/gshadow" #endif #if defined __FreeBSD__ || defined __OpenBSD__ # include # include #elif defined __APPLE__ # include #else # include //This breaks on bionic: //# if !defined(__socklen_t_defined) && !defined(_SOCKLEN_T_DECLARED) ///* We #define socklen_t *after* includes, otherwise we get // * typedef redefinition errors from system headers // * (in case "is it defined already" detection above failed) // */ //# define socklen_t bb_socklen_t // typedef unsigned socklen_t; //# endif //if this is still needed, add a fix along the lines of // ifdef SPECIFIC_BROKEN_LIBC_CHECK / typedef socklen_t / endif //in platform.h instead! #endif #ifndef HAVE_CLEARENV # define clearenv() do { if (environ) environ[0] = NULL; } while (0) #endif #ifndef HAVE_FDATASYNC # define fdatasync fsync #endif #ifndef HAVE_XTABS # define XTABS TAB3 #endif /* * Use '%m' to append error string on platforms that support it, * '%s' and strerror() on those that don't. */ #ifdef HAVE_PRINTF_PERCENTM # define STRERROR_FMT "%m" # define STRERROR_ERRNO /*nothing*/ #else # define STRERROR_FMT "%s" # define STRERROR_ERRNO ,strerror(errno) #endif /* Some libc's forget to declare these, do it ourself */ extern char **environ; /* klogctl is in libc's klog.h, but we cheat and not #include that */ int klogctl(int type, char *b, int len); #ifndef PATH_MAX # define PATH_MAX 256 #endif #ifndef BUFSIZ # define BUFSIZ 4096 #endif #if __GNUC_PREREQ(5,0) /* Since musl is apparently unable to get it right and would use * a function call to a single-instruction function of "bswap %eax", * reroute to gcc builtins: */ # undef bswap_16 # undef bswap_32 # undef bswap_64 # define bswap_16(x) __builtin_bswap16(x) # define bswap_32(x) __builtin_bswap32(x) # define bswap_64(x) __builtin_bswap64(x) # if BB_LITTLE_ENDIAN # undef ntohs # undef htons # undef ntohl # undef htonl # define ntohs(x) __builtin_bswap16(x) # define htons(x) __builtin_bswap16(x) # define ntohl(x) __builtin_bswap32(x) # define htonl(x) __builtin_bswap32(x) # endif #endif /* Busybox does not use threads, we can speed up stdio. */ #ifdef HAVE_UNLOCKED_STDIO # undef getc # define getc(stream) getc_unlocked(stream) # undef getchar # define getchar() getchar_unlocked() # undef putc # define putc(c,stream) putc_unlocked(c,stream) # undef putchar # define putchar(c) putchar_unlocked(c) # undef fgetc # define fgetc(stream) getc_unlocked(stream) # undef fputc # define fputc(c,stream) putc_unlocked(c,stream) #endif /* Above functions are required by POSIX.1-2008, below ones are extensions */ #ifdef HAVE_UNLOCKED_LINE_OPS # undef fgets # define fgets(s,n,stream) fgets_unlocked(s,n,stream) # undef fputs # define fputs(s,stream) fputs_unlocked(s,stream) /* musl <= 1.1.15 does not support fflush_unlocked(NULL) */ //# undef fflush //# define fflush(stream) fflush_unlocked(stream) # undef feof # define feof(stream) feof_unlocked(stream) # undef ferror # define ferror(stream) ferror_unlocked(stream) # undef fileno # define fileno(stream) fileno_unlocked(stream) #endif /* Make all declarations hidden (-fvisibility flag only affects definitions) */ /* (don't include system headers after this until corresponding pop!) */ PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN #if ENABLE_USE_BB_PWD_GRP # include "pwd_.h" # include "grp_.h" #endif #if ENABLE_FEATURE_SHADOWPASSWDS # if ENABLE_USE_BB_SHADOW # include "shadow_.h" # endif #endif /* Tested to work correctly with all int types (IIRC :]) */ #define MAXINT(T) (T)( \ ((T)-1) > 0 \ ? (T)-1 \ : (T)~((T)1 << (sizeof(T)*8-1)) \ ) #define MININT(T) (T)( \ ((T)-1) > 0 \ ? (T)0 \ : ((T)1 << (sizeof(T)*8-1)) \ ) /* Large file support */ /* Note that CONFIG_LFS=y forces bbox to be built with all common ops * (stat, lseek etc) mapped to "largefile" variants by libc. * Practically it means that open() automatically has O_LARGEFILE added * and all filesize/file_offset parameters and struct members are "large" * (in today's world - signed 64bit). For full support of large files, * we need a few helper #defines (below) and careful use of off_t * instead of int/ssize_t. No lseek64(), O_LARGEFILE etc necessary */ #if ENABLE_LFS /* CONFIG_LFS is on */ # if ULONG_MAX > 0xffffffff /* "long" is long enough on this system */ typedef unsigned long uoff_t; # define XATOOFF(a) xatoul_range((a), 0, LONG_MAX) /* usage: sz = BB_STRTOOFF(s, NULL, 10); if (errno || sz < 0) die(); */ # define BB_STRTOOFF bb_strtoul # define STRTOOFF strtoul /* usage: printf("size: %"OFF_FMT"d (%"OFF_FMT"x)\n", sz, sz); */ # define OFF_FMT "l" # else /* "long" is too short, need "long long" */ typedef unsigned long long uoff_t; # define XATOOFF(a) xatoull_range((a), 0, LLONG_MAX) # define BB_STRTOOFF bb_strtoull # define STRTOOFF strtoull # define OFF_FMT "ll" # endif #else /* CONFIG_LFS is off */ /* sizeof(off_t) == sizeof(long). * May or may not be == sizeof(int). If it is, use xatoi_positive() * and bb_strtou() instead of xatoul_range() and bb_strtoul(). * Even if sizeof(off_t) == sizeof(int), off_t is typedef'ed to long anyway. * gcc will throw warnings on printf("%d", off_t)... Have to use %ld etc. */ # if UINT_MAX == ULONG_MAX typedef unsigned long uoff_t; # define XATOOFF(a) xatoi_positive(a) # define BB_STRTOOFF bb_strtou # define STRTOOFF strtol # define OFF_FMT "l" # else typedef unsigned long uoff_t; # define XATOOFF(a) xatoul_range((a), 0, LONG_MAX) # define BB_STRTOOFF bb_strtoul # define STRTOOFF strtol # define OFF_FMT "l" # endif #endif /* scary. better ideas? (but do *test* them first!) */ #define OFF_T_MAX ((off_t)~((off_t)1 << (sizeof(off_t)*8-1))) /* Users report bionic to use 32-bit off_t even if LARGEFILE support is requested. * On musl, !ENABLE_LFS on 32-bit arches thinks that off_t is 32-bit. * We misdetected that. Don't let it build: */ struct BUG_off_t_size_is_misdetected { char BUG_off_t_size_is_misdetected[sizeof(off_t) == sizeof(uoff_t) ? 1 : -1]; }; /* Some useful definitions */ #undef FALSE #define FALSE ((int) 0) #undef TRUE #define TRUE ((int) 1) #undef SKIP #define SKIP ((int) 2) /* Macros for min/max. */ #ifndef MIN #define MIN(a,b) (((a)<(b))?(a):(b)) #endif #ifndef MAX #define MAX(a,b) (((a)>(b))?(a):(b)) #endif /* buffer allocation schemes */ #if ENABLE_FEATURE_BUFFERS_GO_ON_STACK #define RESERVE_CONFIG_BUFFER(buffer,len) char buffer[len] #define RESERVE_CONFIG_UBUFFER(buffer,len) unsigned char buffer[len] #define RELEASE_CONFIG_BUFFER(buffer) ((void)0) #else #if ENABLE_FEATURE_BUFFERS_GO_IN_BSS #define RESERVE_CONFIG_BUFFER(buffer,len) static char buffer[len] #define RESERVE_CONFIG_UBUFFER(buffer,len) static unsigned char buffer[len] #define RELEASE_CONFIG_BUFFER(buffer) ((void)0) #else #define RESERVE_CONFIG_BUFFER(buffer,len) char *buffer = xmalloc(len) #define RESERVE_CONFIG_UBUFFER(buffer,len) unsigned char *buffer = xmalloc(len) #define RELEASE_CONFIG_BUFFER(buffer) free(buffer) #endif #endif /* We use a trick to have more optimized code (fewer pointer reloads * and reduced binary size by a few kilobytes) like: * ash.c: extern struct globals *const ash_ptr_to_globals; * ash_ptr_hack.c: struct globals *ash_ptr_to_globals; * This way, compiler in ash.c knows the pointer can not change. * * However, this may break on weird arches or toolchains. In this case, * set "-DBB_GLOBAL_CONST=''" in CONFIG_EXTRA_CFLAGS to disable * this optimization. */ #ifndef BB_GLOBAL_CONST # define BB_GLOBAL_CONST const #endif #if defined(errno) /* If errno is a define, assume it's "define errno (*__errno_location())" * and we will cache it's result in this variable */ extern int *BB_GLOBAL_CONST bb_errno; # undef errno # define errno (*bb_errno) # define bb_cached_errno_ptr 1 #endif #if !(ULONG_MAX > 0xffffffff) /* Only 32-bit CPUs need this, 64-bit ones use inlined version */ uint64_t bb_bswap_64(uint64_t x) FAST_FUNC; #endif unsigned long FAST_FUNC isqrt(unsigned long long N); unsigned long long monotonic_ns(void) FAST_FUNC; unsigned long long monotonic_us(void) FAST_FUNC; unsigned long long monotonic_ms(void) FAST_FUNC; unsigned monotonic_sec(void) FAST_FUNC; extern void chomp(char *s) FAST_FUNC; extern char *trim(char *s) FAST_FUNC; extern char *skip_whitespace(const char *) FAST_FUNC; extern char *skip_non_whitespace(const char *) FAST_FUNC; extern char *skip_dev_pfx(const char *tty_name) FAST_FUNC; extern char *strrstr(const char *haystack, const char *needle) FAST_FUNC; /* dmalloc will redefine these to it's own implementation. It is safe * to have the prototypes here unconditionally. */ void *malloc_or_warn(size_t size) FAST_FUNC RETURNS_MALLOC; void *xmalloc(size_t size) FAST_FUNC RETURNS_MALLOC; void *xzalloc(size_t size) FAST_FUNC RETURNS_MALLOC; void *xrealloc(void *old, size_t size) FAST_FUNC; /* After v = xrealloc_vector(v, SHIFT, idx) it's ok to use * at least v[idx] and v[idx+1], for all idx values. * SHIFT specifies how many new elements are added (1:2, 2:4, ..., 8:256...) * when all elements are used up. New elements are zeroed out. * xrealloc_vector(v, SHIFT, idx) *MUST* be called with consecutive IDXs - * skipping an index is a bad bug - it may miss a realloc! */ #define xrealloc_vector(vector, shift, idx) \ xrealloc_vector_helper((vector), (sizeof((vector)[0]) << 8) + (shift), (idx)) void* xrealloc_vector_helper(void *vector, unsigned sizeof_and_shift, int idx) FAST_FUNC; char *xstrdup(const char *s) FAST_FUNC RETURNS_MALLOC; char *xstrndup(const char *s, size_t n) FAST_FUNC RETURNS_MALLOC; void *xmemdup(const void *s, size_t n) FAST_FUNC RETURNS_MALLOC; void *mmap_read(int fd, size_t size) FAST_FUNC; void *mmap_anon(size_t size) FAST_FUNC; void *xmmap_anon(size_t size) FAST_FUNC; #if defined(__x86_64__) || defined(i386) # define BB_ARCH_FIXED_PAGESIZE 4096 #elif defined(__arm__) /* only 32bit, 64bit ARM has variable page size */ # define BB_ARCH_FIXED_PAGESIZE 4096 #else /* if defined(ARCH) */ /* add you favorite arch today! */ //From Linux kernel inspection: //xtenza,s390[x],riscv,nios2,csky,sparc32: fixed 4k pages //sparc64,alpha,openrisc: fixed 8k pages #endif #if defined BB_ARCH_FIXED_PAGESIZE # define IF_VARIABLE_ARCH_PAGESIZE(...) /*nothing*/ # define bb_getpagesize() BB_ARCH_FIXED_PAGESIZE # define INIT_PAGESIZE(var) ((void)0) # define cached_pagesize(var) BB_ARCH_FIXED_PAGESIZE #else # define IF_VARIABLE_ARCH_PAGESIZE(...) __VA_ARGS__ # define bb_getpagesize() getpagesize() # define INIT_PAGESIZE(var) ((var) = getpagesize()) # define cached_pagesize(var) (var) #endif /* Generate ls-style "mode string" like "-rwsr-xr-x" or "drwxrwxrwt" */ extern char *bb_mode_string(char buf[11], mode_t mode) FAST_FUNC; extern int is_directory(const char *name, int followLinks) FAST_FUNC; enum { /* cp.c, mv.c, install.c depend on these values. CAREFUL when changing them! */ FILEUTILS_PRESERVE_STATUS = 1 << 0, /* -p */ FILEUTILS_DEREFERENCE = 1 << 1, /* !-d */ FILEUTILS_RECUR = 1 << 2, /* -R */ FILEUTILS_FORCE = 1 << 3, /* -f */ FILEUTILS_INTERACTIVE = 1 << 4, /* -i */ FILEUTILS_NO_OVERWRITE = 1 << 5, /* -n */ FILEUTILS_MAKE_HARDLINK = 1 << 6, /* -l */ FILEUTILS_MAKE_SOFTLINK = 1 << 7, /* -s */ FILEUTILS_DEREF_SOFTLINK = 1 << 8, /* -L */ FILEUTILS_DEREFERENCE_L0 = 1 << 9, /* -H */ /* -a = -pdR (mapped in cp.c) */ /* -r = -dR (mapped in cp.c) */ /* -P = -d (mapped in cp.c) */ FILEUTILS_VERBOSE = (1 << 13) * ENABLE_FEATURE_VERBOSE, /* -v */ FILEUTILS_UPDATE = 1 << 14, /* -u */ FILEUTILS_NO_TARGET_DIR = 1 << 15, /* -T */ FILEUTILS_TARGET_DIR = 1 << 16, /* -t DIR */ #if ENABLE_SELINUX FILEUTILS_PRESERVE_SECURITY_CONTEXT = 1 << 17, /* -c */ #endif #define FILEUTILS_CP_OPTSTR "pdRfinlsLHarPvuTt:" IF_SELINUX("c") /* How many bits in FILEUTILS_CP_OPTSTR? */ FILEUTILS_CP_OPTBITS = 18 - !ENABLE_SELINUX, FILEUTILS_RMDEST = 1 << (19 - !ENABLE_SELINUX), /* cp --remove-destination */ /* bit 18 skipped for "cp --parents" */ FILEUTILS_REFLINK = 1 << (20 - !ENABLE_SELINUX), /* cp --reflink=auto */ FILEUTILS_REFLINK_ALWAYS = 1 << (21 - !ENABLE_SELINUX), /* cp --reflink[=always] */ /* * Hole. cp may have some bits set here, * they should not affect remove_file()/copy_file() */ #if ENABLE_SELINUX FILEUTILS_SET_SECURITY_CONTEXT = 1 << 30, #endif FILEUTILS_IGNORE_CHMOD_ERR = 1 << 31, }; extern int remove_file(const char *path, int flags) FAST_FUNC; /* NB: without FILEUTILS_RECUR in flags, it will basically "cat" * the source, not copy (unless "source" is a directory). * This makes "cp /dev/null file" and "install /dev/null file" (!!!) * work coreutils-compatibly. */ extern int copy_file(const char *source, const char *dest, int flags) FAST_FUNC; enum { ACTION_RECURSE = (1 << 0), ACTION_FOLLOWLINKS = (1 << 1), ACTION_FOLLOWLINKS_L0 = (1 << 2), ACTION_DEPTHFIRST = (1 << 3), ACTION_QUIET = (1 << 4), ACTION_DANGLING_OK = (1 << 5), }; typedef uint8_t recurse_flags_t; typedef struct recursive_state { unsigned flags; unsigned depth; void *userData; int FAST_FUNC (*fileAction)(struct recursive_state *state, const char *fileName, struct stat* statbuf); int FAST_FUNC (*dirAction)(struct recursive_state *state, const char *fileName, struct stat* statbuf); } recursive_state_t; int recursive_action(const char *fileName, unsigned flags, int FAST_FUNC (*fileAction)(struct recursive_state *state, const char *fileName, struct stat* statbuf), int FAST_FUNC (*dirAction)(struct recursive_state *state, const char *fileName, struct stat* statbuf), void *userData ) FAST_FUNC; /* Simpler version: call a function on each dirent in a directory */ int iterate_on_dir(const char *dir_name, int FAST_FUNC (*func)(const char *, struct dirent *, void *), void *private) FAST_FUNC; extern int device_open(const char *device, int mode) FAST_FUNC; enum { GETPTY_BUFSIZE = 16 }; /* more than enough for "/dev/ttyXXX" */ extern int xgetpty(char *line) FAST_FUNC; extern int get_console_fd_or_die(void) FAST_FUNC; extern void console_make_active(int fd, const int vt_num) FAST_FUNC; extern char *find_block_device(const char *path) FAST_FUNC; /* bb_copyfd_XX print read/write errors and return -1 if they occur */ extern off_t bb_copyfd_eof(int fd1, int fd2) FAST_FUNC; extern off_t bb_copyfd_size(int fd1, int fd2, off_t size) FAST_FUNC; extern void bb_copyfd_exact_size(int fd1, int fd2, off_t size) FAST_FUNC; /* "short" copy can be detected by return value < size */ /* this helper yells "short read!" if param is not -1 */ extern void complain_copyfd_and_die(off_t sz) NORETURN FAST_FUNC; extern char bb_process_escape_sequence(const char **ptr) FAST_FUNC; char* strcpy_and_process_escape_sequences(char *dst, const char *src) FAST_FUNC; /* xxxx_strip version can modify its parameter: * "/" -> "/" * "abc" -> "abc" * "abc/def" -> "def" * "abc/def/" -> "def" !! */ char *bb_get_last_path_component_strip(char *path) FAST_FUNC; /* "abc/def/" -> "" and it never modifies 'path' */ char *bb_get_last_path_component_nostrip(const char *path) FAST_FUNC; /* Simpler version: does not special case "/" string */ const char *bb_basename(const char *name) FAST_FUNC; /* NB: can violate const-ness (similarly to strchr) */ char *last_char_is(const char *s, int c) FAST_FUNC; const char* endofname(const char *name) FAST_FUNC; char *is_prefixed_with(const char *string, const char *key) FAST_FUNC; char *is_suffixed_with(const char *string, const char *key) FAST_FUNC; int ndelay_on(int fd) FAST_FUNC; int ndelay_off(int fd) FAST_FUNC; void close_on_exec_on(int fd) FAST_FUNC; void xdup2(int, int) FAST_FUNC; void xmove_fd(int, int) FAST_FUNC; DIR *xopendir(const char *path) FAST_FUNC; DIR *warn_opendir(const char *path) FAST_FUNC; char *xmalloc_realpath(const char *path) FAST_FUNC RETURNS_MALLOC; char *xmalloc_realpath_coreutils(char *path) FAST_FUNC RETURNS_MALLOC; char *xmalloc_readlink(const char *path) FAST_FUNC RETURNS_MALLOC; char *xmalloc_readlink_or_warn(const char *path) FAST_FUNC RETURNS_MALLOC; /* !RETURNS_MALLOC: it's a realloc-like function */ char *xrealloc_getcwd_or_warn(char *cwd) FAST_FUNC; char *xmalloc_follow_symlinks(const char *path) FAST_FUNC RETURNS_MALLOC; enum { /* bb_signals(BB_FATAL_SIGS, handler) catches all signals which * otherwise would kill us, except for those resulting from bugs: * SIGSEGV, SIGILL, SIGFPE. * Other fatal signals not included (TODO?): * SIGBUS Bus error (bad memory access) * SIGPOLL Pollable event. Synonym of SIGIO * SIGPROF Profiling timer expired * SIGSYS Bad argument to routine * SIGTRAP Trace/breakpoint trap * * The only known arch with some of these sigs not fitting * into 32 bits is parisc (SIGXCPU=33, SIGXFSZ=34, SIGSTKFLT=36). * Dance around with long long to guard against that... */ BB_FATAL_SIGS = (int)(0 + (1LL << SIGHUP) + (1LL << SIGINT) + (1LL << SIGTERM) + (1LL << SIGPIPE) // Write to pipe with no readers + (1LL << SIGQUIT) // Quit from keyboard + (1LL << SIGABRT) // Abort signal from abort(3) + (1LL << SIGALRM) // Timer signal from alarm(2) + (1LL << SIGVTALRM) // Virtual alarm clock + (1LL << SIGXCPU) // CPU time limit exceeded + (1LL << SIGXFSZ) // File size limit exceeded + (1LL << SIGUSR1) // Yes kids, these are also fatal! + (1LL << SIGUSR2) + 0), }; void bb_signals(int sigs, void (*f)(int)) FAST_FUNC; /* Unlike signal() and bb_signals, sets handler with sigaction() * and in a way that while signal handler is run, no other signals * will be blocked; syscalls will not be restarted: */ void bb_signals_norestart(int sigs, void (*f)(int)) FAST_FUNC; /* syscalls like read() will be interrupted with EINTR: */ void signal_no_SA_RESTART_empty_mask(int sig, void (*handler)(int)) FAST_FUNC; /* syscalls like read() won't be interrupted (though select/poll will be): */ void signal_SA_RESTART_empty_mask(int sig, void (*handler)(int)) FAST_FUNC; void wait_for_any_sig(void) FAST_FUNC; void kill_myself_with_sig(int sig) NORETURN FAST_FUNC; void sig_block(int sig) FAST_FUNC; void sig_unblock(int sig) FAST_FUNC; /* Will do sigaction(signum, act, NULL): */ int sigaction_set(int sig, const struct sigaction *act) FAST_FUNC; /* SIG_BLOCK/SIG_UNBLOCK all signals: */ int sigprocmask_allsigs(int how) FAST_FUNC; /* Return old set in the same set: */ int sigprocmask2(int how, sigset_t *set) FAST_FUNC; /* Standard handler which just records signo */ extern smallint bb_got_signal; void record_signo(int signo); /* not FAST_FUNC! */ void xsetgid(gid_t gid) FAST_FUNC; void xsetuid(uid_t uid) FAST_FUNC; void xsetegid(gid_t egid) FAST_FUNC; void xseteuid(uid_t euid) FAST_FUNC; int chdir_or_warn(const char *path) FAST_FUNC; void xchdir(const char *path) FAST_FUNC; void xfchdir(int fd) FAST_FUNC; void xchroot(const char *path) FAST_FUNC; void xsetenv(const char *key, const char *value) FAST_FUNC; void bb_unsetenv(const char *key) FAST_FUNC; void bb_unsetenv_and_free(char *key) FAST_FUNC; void xunlink(const char *pathname) FAST_FUNC; void xstat(const char *pathname, struct stat *buf) FAST_FUNC; void xfstat(int fd, struct stat *buf, const char *errmsg) FAST_FUNC; int open3_or_warn(const char *pathname, int flags, int mode) FAST_FUNC; int open_or_warn(const char *pathname, int flags) FAST_FUNC; int xopen3(const char *pathname, int flags, int mode) FAST_FUNC; int xopen(const char *pathname, int flags) FAST_FUNC; int xopen_nonblocking(const char *pathname) FAST_FUNC; int xopen_as_uid_gid(const char *pathname, int flags, uid_t u, gid_t g) FAST_FUNC; int open_or_warn_stdin(const char *pathname) FAST_FUNC; int xopen_stdin(const char *pathname) FAST_FUNC; void xrename(const char *oldpath, const char *newpath) FAST_FUNC; int rename_or_warn(const char *oldpath, const char *newpath) FAST_FUNC; off_t xlseek(int fd, off_t offset, int whence) FAST_FUNC; int xmkstemp(char *template) FAST_FUNC; off_t fdlength(int fd) FAST_FUNC; uoff_t FAST_FUNC get_volume_size_in_bytes(int fd, const char *override, unsigned override_units, int extend); void xpipe(int *filedes) FAST_FUNC; /* In this form code with pipes is much more readable */ struct fd_pair { int rd; int wr; }; #define piped_pair(pair) pipe(&((pair).rd)) #define xpiped_pair(pair) xpipe(&((pair).rd)) /* Useful for having small structure members/global variables */ typedef int8_t socktype_t; typedef int8_t family_t; struct BUG_too_small { char BUG_socktype_t_too_small[(0 | SOCK_STREAM | SOCK_DGRAM | SOCK_RDM | SOCK_SEQPACKET | SOCK_RAW ) <= 127 ? 1 : -1]; char BUG_family_t_too_small[(0 | AF_UNSPEC | AF_INET | AF_INET6 | AF_UNIX #ifdef AF_PACKET | AF_PACKET #endif #ifdef AF_NETLINK | AF_NETLINK #endif /* | AF_DECnet */ /* | AF_IPX */ ) <= 127 ? 1 : -1]; }; int parse_datestr(const char *date_str, struct tm *ptm) FAST_FUNC; time_t validate_tm_time(const char *date_str, struct tm *ptm) FAST_FUNC; char *strftime_HHMMSS(char *buf, unsigned len, time_t *tp) FAST_FUNC; char *strftime_YYYYMMDDHHMMSS(char *buf, unsigned len, time_t *tp) FAST_FUNC; void xgettimeofday(struct timeval *tv) FAST_FUNC; void xsettimeofday(const struct timeval *tv) FAST_FUNC; int xsocket(int domain, int type, int protocol) FAST_FUNC; void xbind(int sockfd, struct sockaddr *my_addr, socklen_t addrlen) FAST_FUNC; void xlisten(int s, int backlog) FAST_FUNC; void xconnect(int s, const struct sockaddr *s_addr, socklen_t addrlen) FAST_FUNC; ssize_t xsendto(int s, const void *buf, size_t len, const struct sockaddr *to, socklen_t tolen) FAST_FUNC; int setsockopt_int(int fd, int level, int optname, int optval) FAST_FUNC; int setsockopt_1(int fd, int level, int optname) FAST_FUNC; int setsockopt_SOL_SOCKET_int(int fd, int optname, int optval) FAST_FUNC; int setsockopt_SOL_SOCKET_1(int fd, int optname) FAST_FUNC; /* SO_REUSEADDR allows a server to rebind to an address that is already * "in use" by old connections to e.g. previous server instance which is * killed or crashed. Without it bind will fail until all such connections * time out. Linux does not allow multiple live binds on same ip:port * regardless of SO_REUSEADDR (unlike some other flavors of Unix). * Turn it on before you call bind(). */ void setsockopt_reuseaddr(int fd) FAST_FUNC; /* On Linux this never fails. */ int setsockopt_keepalive(int fd) FAST_FUNC; int setsockopt_broadcast(int fd) FAST_FUNC; int setsockopt_bindtodevice(int fd, const char *iface) FAST_FUNC; int bb_getsockname(int sockfd, void *addr, socklen_t addrlen) FAST_FUNC; /* NB: returns port in host byte order */ unsigned bb_lookup_port(const char *port, const char *protocol, unsigned default_port) FAST_FUNC; #if ENABLE_FEATURE_ETC_SERVICES # define bb_lookup_std_port(portstr, protocol, portnum) bb_lookup_port(portstr, protocol, portnum) #else # define bb_lookup_std_port(portstr, protocol, portnum) (portnum) #endif typedef struct len_and_sockaddr { socklen_t len; union { struct sockaddr sa; struct sockaddr_in sin; #if ENABLE_FEATURE_IPV6 struct sockaddr_in6 sin6; #endif } u; } len_and_sockaddr; enum { LSA_LEN_SIZE = offsetof(len_and_sockaddr, u), LSA_SIZEOF_SA = sizeof( union { struct sockaddr sa; struct sockaddr_in sin; #if ENABLE_FEATURE_IPV6 struct sockaddr_in6 sin6; #endif } ) }; /* Create stream socket, and allocate suitable lsa. * (lsa of correct size and lsa->sa.sa_family (AF_INET/AF_INET6)) * af == AF_UNSPEC will result in trying to create IPv6 socket, * and if kernel doesn't support it, fall back to IPv4. * This is useful if you plan to bind to resulting local lsa. */ int xsocket_type(len_and_sockaddr **lsap, int af, int sock_type) FAST_FUNC; int xsocket_stream(len_and_sockaddr **lsap) FAST_FUNC; /* Create server socket bound to bindaddr:port. bindaddr can be NULL, * numeric IP ("N.N.N.N") or numeric IPv6 address, * and can have ":PORT" suffix (for IPv6 use "[X:X:...:X]:PORT"). * Only if there is no suffix, port argument is used */ /* NB: these set SO_REUSEADDR before bind */ int create_and_bind_stream_or_die(const char *bindaddr, int port) FAST_FUNC; int create_and_bind_dgram_or_die(const char *bindaddr, int port) FAST_FUNC; int create_and_bind_to_netlink(int proto, int grp, unsigned rcvbuf) FAST_FUNC; /* Create client TCP socket connected to peer:port. Peer cannot be NULL. * Peer can be numeric IP ("N.N.N.N"), numeric IPv6 address or hostname, * and can have ":PORT" suffix (for IPv6 use "[X:X:...:X]:PORT"). * If there is no suffix, port argument is used */ int create_and_connect_stream_or_die(const char *peer, int port) FAST_FUNC; /* Connect to peer identified by lsa */ int xconnect_stream(const len_and_sockaddr *lsa) FAST_FUNC; /* Get local address of bound or accepted socket */ len_and_sockaddr *get_sock_lsa(int fd) FAST_FUNC RETURNS_MALLOC; /* Get remote address of connected or accepted socket */ len_and_sockaddr *get_peer_lsa(int fd) FAST_FUNC RETURNS_MALLOC; /* Return malloc'ed len_and_sockaddr with socket address of host:port * Currently will return IPv4 or IPv6 sockaddrs only * (depending on host), but in theory nothing prevents e.g. * UNIX socket address being returned, IPX sockaddr etc... * On error does bb_error_msg and returns NULL */ len_and_sockaddr* host2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC; /* Version which dies on error */ len_and_sockaddr* xhost2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC; len_and_sockaddr* xdotted2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC; /* Same, useful if you want to force family (e.g. IPv6) */ #if !ENABLE_FEATURE_IPV6 #define host_and_af2sockaddr(host, port, af) host2sockaddr((host), (port)) #define xhost_and_af2sockaddr(host, port, af) xhost2sockaddr((host), (port)) #else len_and_sockaddr* host_and_af2sockaddr(const char *host, int port, sa_family_t af) FAST_FUNC RETURNS_MALLOC; len_and_sockaddr* xhost_and_af2sockaddr(const char *host, int port, sa_family_t af) FAST_FUNC RETURNS_MALLOC; #endif /* Assign sin[6]_port member if the socket is an AF_INET[6] one, * otherwise no-op. Useful for ftp. * NB: does NOT do htons() internally, just direct assignment. */ void set_nport(struct sockaddr *sa, unsigned port) FAST_FUNC; /* Retrieve sin[6]_port or return -1 for non-INET[6] lsa's */ int get_nport(const struct sockaddr *sa) FAST_FUNC; /* Reverse DNS. Returns NULL on failure. */ char* xmalloc_sockaddr2host(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC; /* This one doesn't append :PORTNUM */ char* xmalloc_sockaddr2host_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC; /* This one also doesn't fall back to dotted IP (returns NULL) */ char* xmalloc_sockaddr2hostonly_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC; /* inet_[ap]ton on steroids */ char* xmalloc_sockaddr2dotted(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC; char* xmalloc_sockaddr2dotted_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC; // "old" (ipv4 only) API // users: traceroute.c hostname.c - use _list_ of all IPs struct hostent *xgethostbyname(const char *name) FAST_FUNC; // Also mount.c and inetd.c are using gethostbyname(), // + inet_common.c has additional IPv4-only stuff struct tls_aes { uint32_t key[60]; unsigned rounds; }; #define TLS_MAX_MAC_SIZE 32 #define TLS_MAX_KEY_SIZE 32 #define TLS_MAX_IV_SIZE 4 struct tls_handshake_data; /* opaque */ typedef struct tls_state { unsigned flags; int ofd; int ifd; unsigned min_encrypted_len_on_read; uint16_t cipher_id; unsigned MAC_size; unsigned key_size; unsigned IV_size; uint8_t *outbuf; int outbuf_size; int inbuf_size; int ofs_to_buffered; int buffered_size; uint8_t *inbuf; struct tls_handshake_data *hsd; // RFC 5246 // sequence number // Each connection state contains a sequence number, which is // maintained separately for read and write states. The sequence // number MUST be set to zero whenever a connection state is made the // active state. Sequence numbers are of type uint64 and may not // exceed 2^64-1. /*uint64_t read_seq64_be;*/ uint64_t write_seq64_be; /*uint8_t *server_write_MAC_key;*/ uint8_t *client_write_key; uint8_t *server_write_key; uint8_t *client_write_IV; uint8_t *server_write_IV; uint8_t client_write_MAC_key[TLS_MAX_MAC_SIZE]; uint8_t server_write_MAC_k__[TLS_MAX_MAC_SIZE]; uint8_t client_write_k__[TLS_MAX_KEY_SIZE]; uint8_t server_write_k__[TLS_MAX_KEY_SIZE]; uint8_t client_write_I_[TLS_MAX_IV_SIZE]; uint8_t server_write_I_[TLS_MAX_IV_SIZE]; struct tls_aes aes_encrypt; struct tls_aes aes_decrypt; uint8_t H[16]; //used by AES_GCM } tls_state_t; static inline tls_state_t *new_tls_state(void) { tls_state_t *tls = xzalloc(sizeof(*tls)); return tls; } void tls_handshake(tls_state_t *tls, const char *sni) FAST_FUNC; #define TLSLOOP_EXIT_ON_LOCAL_EOF (1 << 0) void tls_run_copy_loop(tls_state_t *tls, unsigned flags) FAST_FUNC; void socket_want_pktinfo(int fd) FAST_FUNC; ssize_t send_to_from(int fd, void *buf, size_t len, int flags, const struct sockaddr *to, const struct sockaddr *from, socklen_t tolen) FAST_FUNC; ssize_t recv_from_to(int fd, void *buf, size_t len, int flags, struct sockaddr *from, struct sockaddr *to, socklen_t sa_size) FAST_FUNC; uint16_t inet_cksum(const void *addr, int len) FAST_FUNC; int parse_pasv_epsv(char *buf) FAST_FUNC; /* 0 if argv[0] is NULL: */ unsigned string_array_len(char **argv) FAST_FUNC; void overlapping_strcpy(char *dst, const char *src) FAST_FUNC; char *safe_strncpy(char *dst, const char *src, size_t size) FAST_FUNC; char *strncpy_IFNAMSIZ(char *dst, const char *src) FAST_FUNC; unsigned count_strstr(const char *str, const char *sub) FAST_FUNC; char *xmalloc_substitute_string(const char *src, int count, const char *sub, const char *repl) FAST_FUNC; /* Guaranteed to NOT be a macro (smallest code). Saves nearly 2k on uclibc. * But potentially slow, don't use in one-billion-times loops */ int bb_putchar(int ch) FAST_FUNC; /* Note: does not use stdio, writes to fd 2 directly */ int bb_putchar_stderr(char ch) FAST_FUNC; int fputs_stdout(const char *s) FAST_FUNC; char *xasprintf(const char *format, ...) __attribute__ ((format(printf, 1, 2))) FAST_FUNC RETURNS_MALLOC; char *auto_string(char *str) FAST_FUNC; // gcc-4.1.1 still isn't good enough at optimizing it // (+200 bytes compared to macro) //static ALWAYS_INLINE //int LONE_DASH(const char *s) { return s[0] == '-' && !s[1]; } //static ALWAYS_INLINE //int NOT_LONE_DASH(const char *s) { return s[0] != '-' || s[1]; } #define LONE_DASH(s) ((s)[0] == '-' && !(s)[1]) #define NOT_LONE_DASH(s) ((s)[0] != '-' || (s)[1]) #define LONE_CHAR(s,c) ((s)[0] == (c) && !(s)[1]) #define NOT_LONE_CHAR(s,c) ((s)[0] != (c) || (s)[1]) #define DOT_OR_DOTDOT(s) ((s)[0] == '.' && (!(s)[1] || ((s)[1] == '.' && !(s)[2]))) typedef struct uni_stat_t { unsigned byte_count; unsigned unicode_count; unsigned unicode_width; } uni_stat_t; /* Returns a string with unprintable chars replaced by '?' or * SUBST_WCHAR. This function is unicode-aware. */ const char* FAST_FUNC printable_string(const char *str); const char* FAST_FUNC printable_string2(uni_stat_t *stats, const char *str); /* Prints unprintable char ch as ^C or M-c to file * (M-c is used only if ch is ORed with PRINTABLE_META), * else it is printed as-is (except for ch = 0x9b) */ enum { PRINTABLE_META = 0x100 }; void fputc_printable(int ch, FILE *file) FAST_FUNC; /* Return a string that is the printable representation of character ch. * Buffer must hold at least four characters. */ enum { VISIBLE_ENDLINE = 1 << 0, VISIBLE_SHOW_TABS = 1 << 1, }; void visible(unsigned ch, char *buf, int flags) FAST_FUNC; extern ssize_t safe_read(int fd, void *buf, size_t count) FAST_FUNC; extern ssize_t nonblock_immune_read(int fd, void *buf, size_t count) FAST_FUNC; // NB: will return short read on error, not -1, // if some data was read before error occurred extern ssize_t full_read(int fd, void *buf, size_t count) FAST_FUNC; extern void xread(int fd, void *buf, size_t count) FAST_FUNC; extern unsigned char xread_char(int fd) FAST_FUNC; extern ssize_t read_close(int fd, void *buf, size_t maxsz) FAST_FUNC; extern ssize_t open_read_close(const char *filename, void *buf, size_t maxsz) FAST_FUNC; // Reads one line a-la fgets (but doesn't save terminating '\n'). // Reads byte-by-byte. Useful when it is important to not read ahead. // Bytes are appended to pfx (which must be malloced, or NULL). extern char *xmalloc_reads(int fd, size_t *maxsz_p) FAST_FUNC; /* Reads block up to *maxsz_p (default: INT_MAX - 4095) */ extern void *xmalloc_read(int fd, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC; extern void *xmalloc_read_with_initial_buf(int fd, size_t *maxsz_p, char *buf, size_t total) FAST_FUNC; /* Returns NULL if file can't be opened (default max size: INT_MAX - 4095) */ extern void *xmalloc_open_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC; /* Never returns NULL */ extern void *xmalloc_xopen_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC; #if defined(ARG_MAX) && (ARG_MAX >= 60*1024 || !defined(_SC_ARG_MAX)) /* Use _constant_ maximum if: defined && (big enough || no variable one exists) */ # define bb_arg_max() ((unsigned)ARG_MAX) #elif defined(_SC_ARG_MAX) /* Else use variable one (a bit more expensive) */ unsigned bb_arg_max(void) FAST_FUNC; #else /* If all else fails */ # define bb_arg_max() ((unsigned)(32 * 1024)) #endif unsigned bb_clk_tck(void) FAST_FUNC; #define SEAMLESS_COMPRESSION (0 \ || ENABLE_FEATURE_SEAMLESS_XZ \ || ENABLE_FEATURE_SEAMLESS_LZMA \ || ENABLE_FEATURE_SEAMLESS_BZ2 \ || ENABLE_FEATURE_SEAMLESS_GZ \ || ENABLE_FEATURE_SEAMLESS_Z) #if SEAMLESS_COMPRESSION /* Autodetects gzip/bzip2 formats. fd may be in the middle of the file! */ int setup_unzip_on_fd(int fd, int fail_if_not_compressed) FAST_FUNC; /* Autodetects .gz etc */ extern int open_zipped(const char *fname, int fail_if_not_compressed) FAST_FUNC; extern void *xmalloc_open_zipped_read_close(const char *fname, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC; #else # define setup_unzip_on_fd(...) (0) # define open_zipped(fname, fail_if_not_compressed) open((fname), O_RDONLY); # define xmalloc_open_zipped_read_close(fname, maxsz_p) xmalloc_open_read_close((fname), (maxsz_p)) #endif /* lzma has no signature, need a little helper. NB: exist only for ENABLE_FEATURE_SEAMLESS_LZMA=y */ void setup_lzma_on_fd(int fd) FAST_FUNC; extern ssize_t safe_write(int fd, const void *buf, size_t count) FAST_FUNC; // NB: will return short write on error, not -1, // if some data was written before error occurred extern ssize_t full_write(int fd, const void *buf, size_t count) FAST_FUNC; extern void xwrite(int fd, const void *buf, size_t count) FAST_FUNC; extern void xwrite_str(int fd, const char *str) FAST_FUNC; extern ssize_t full_write1_str(const char *str) FAST_FUNC; extern ssize_t full_write2_str(const char *str) FAST_FUNC; extern void xopen_xwrite_close(const char* file, const char *str) FAST_FUNC; /* Close fd, but check for failures (some types of write errors) */ extern void xclose(int fd) FAST_FUNC; /* Reads and prints to stdout till eof, then closes FILE. Exits on error: */ extern void xprint_and_close_file(FILE *file) FAST_FUNC; /* Reads a line from a text file, up to a newline or NUL byte, inclusive. * Returns malloc'ed char*. If end is NULL '\n' isn't considered * end of line. If end isn't NULL, length of the chunk is stored in it. * Returns NULL if EOF/error. */ extern char *bb_get_chunk_from_file(FILE *file, size_t *end) FAST_FUNC; /* Reads up to (and including) TERMINATING_STRING: */ extern char *xmalloc_fgets_str(FILE *file, const char *terminating_string) FAST_FUNC RETURNS_MALLOC; /* Same, with limited max size, and returns the length (excluding NUL): */ extern char *xmalloc_fgets_str_len(FILE *file, const char *terminating_string, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC; /* Chops off TERMINATING_STRING from the end: */ extern char *xmalloc_fgetline_str(FILE *file, const char *terminating_string) FAST_FUNC RETURNS_MALLOC; /* Reads up to (and including) "\n" or NUL byte: */ extern char *xmalloc_fgets(FILE *file) FAST_FUNC RETURNS_MALLOC; /* Chops off '\n' from the end, unlike fgets: */ extern char *xmalloc_fgetline(FILE *file) FAST_FUNC RETURNS_MALLOC; /* Same, but doesn't try to conserve space (may have some slack after the end) */ /* extern char *xmalloc_fgetline_fast(FILE *file) FAST_FUNC RETURNS_MALLOC; */ void die_if_ferror(FILE *file, const char *msg) FAST_FUNC; void die_if_ferror_stdout(void) FAST_FUNC; int fflush_all(void) FAST_FUNC; void fflush_stdout_and_exit(int retval) NORETURN FAST_FUNC; void fflush_stdout_and_exit_SUCCESS(void) NORETURN FAST_FUNC; int fclose_if_not_stdin(FILE *file) FAST_FUNC; FILE* xfopen(const char *filename, const char *mode) FAST_FUNC; /* Prints warning to stderr and returns NULL on failure: */ FILE* fopen_or_warn(const char *filename, const char *mode) FAST_FUNC; /* "Opens" stdin if filename is special, else just opens file: */ FILE* xfopen_stdin(const char *filename) FAST_FUNC; FILE* fopen_or_warn_stdin(const char *filename) FAST_FUNC; FILE* fopen_for_read(const char *path) FAST_FUNC; FILE* xfopen_for_read(const char *path) FAST_FUNC; FILE* fopen_for_write(const char *path) FAST_FUNC; FILE* xfopen_for_write(const char *path) FAST_FUNC; FILE* xfdopen_for_read(int fd) FAST_FUNC; FILE* xfdopen_for_write(int fd) FAST_FUNC; int bb_pstrcmp(const void *a, const void *b) /* not FAST_FUNC! */; void qsort_string_vector(char **sv, unsigned count) FAST_FUNC; /* Wrapper which restarts poll on EINTR or ENOMEM. * On other errors complains [perror("poll")] and returns. * Warning! May take (much) longer than timeout_ms to return! * If this is a problem, use bare poll and open-code EINTR/ENOMEM handling */ int safe_poll(struct pollfd *ufds, nfds_t nfds, int timeout_ms) FAST_FUNC; char *safe_gethostname(void) FAST_FUNC; /* Convert each alpha char in str to lower-case */ char* str_tolower(char *str) FAST_FUNC; char *utoa(unsigned n) FAST_FUNC; char *itoa(int n) FAST_FUNC; /* Returns a pointer past the formatted number, does NOT null-terminate */ char *utoa_to_buf(unsigned n, char *buf, unsigned buflen) FAST_FUNC; char *itoa_to_buf(int n, char *buf, unsigned buflen) FAST_FUNC; /* Intelligent formatters of bignums */ char *smart_ulltoa4(unsigned long long ul, char buf[4], const char *scale) FAST_FUNC; char *smart_ulltoa5(unsigned long long ul, char buf[5], const char *scale) FAST_FUNC; /* If block_size == 0, display size without fractional part, * else display (size * block_size) with one decimal digit. * If display_unit == 0, show value no bigger than 1024 with suffix (K,M,G...), * else divide by display_unit and do not use suffix. * Returns "auto pointer" */ #define HUMAN_READABLE_MAX_WIDTH 7 /* "1024.0G" */ #define HUMAN_READABLE_MAX_WIDTH_STR "7" const char *make_human_readable_str(unsigned long long size, unsigned long block_size, unsigned long display_unit) FAST_FUNC; /* Put a string of hex bytes ("1b2e66fe"...), return advanced pointer */ char *bin2hex(char *dst, const char *src, int count) FAST_FUNC; /* Reverse */ char* hex2bin(char *dst, const char *src, int count) FAST_FUNC; /* Generate a UUID */ void generate_uuid(uint8_t *buf) FAST_FUNC; /* Last element is marked by mult == 0 */ struct suffix_mult { char suffix[4]; uint32_t mult; }; #define ALIGN_SUFFIX ALIGN4 extern const struct suffix_mult bkm_suffixes[]; #define km_suffixes (bkm_suffixes + 1) extern const struct suffix_mult cwbkMG_suffixes[]; #define kMG_suffixes (cwbkMG_suffixes + 3) extern const struct suffix_mult kmg_i_suffixes[]; #include "xatonum.h" /* Specialized: */ /* Using xatoi() instead of naive atoi() is not always convenient - * in many places people want *non-negative* values, but store them * in signed int. Therefore we need this one: * dies if input is not in [0, INT_MAX] range. Also will reject '-0' etc. * It should really be named xatoi_nonnegative (since it allows 0), * but that would be too long. */ int xatoi_positive(const char *numstr) FAST_FUNC; /* Useful for reading port numbers */ uint16_t xatou16(const char *numstr) FAST_FUNC; #if ENABLE_FLOAT_DURATION typedef double duration_t; void sleep_for_duration(duration_t duration) FAST_FUNC; #define DURATION_FMT "f" #else typedef unsigned duration_t; #define sleep_for_duration(duration) sleep(duration) #define DURATION_FMT "u" #endif duration_t parse_duration_str(char *str) FAST_FUNC; /* These parse entries in /etc/passwd and /etc/group. This is desirable * for BusyBox since we want to avoid using the glibc NSS stuff, which * increases target size and is often not needed on embedded systems. */ long xuname2uid(const char *name) FAST_FUNC; long xgroup2gid(const char *name) FAST_FUNC; /* wrapper: allows string to contain numeric uid or gid */ unsigned long get_ug_id(const char *s, long FAST_FUNC (*xname2id)(const char *)) FAST_FUNC; struct bb_uidgid_t { uid_t uid; gid_t gid; }; /* always sets uid and gid; returns 0 on failure */ int get_uidgid(struct bb_uidgid_t*, const char*) FAST_FUNC; /* always sets uid and gid; exits on failure */ void xget_uidgid(struct bb_uidgid_t*, const char*) FAST_FUNC; /* chown-like handling of "user[:[group]" */ void parse_chown_usergroup_or_die(struct bb_uidgid_t *u, char *user_group) FAST_FUNC; struct passwd* xgetpwnam(const char *name) FAST_FUNC; struct group* xgetgrnam(const char *name) FAST_FUNC; struct passwd* xgetpwuid(uid_t uid) FAST_FUNC; struct group* xgetgrgid(gid_t gid) FAST_FUNC; char* xuid2uname(uid_t uid) FAST_FUNC; char* xgid2group(gid_t gid) FAST_FUNC; char* uid2uname(uid_t uid) FAST_FUNC; char* gid2group(gid_t gid) FAST_FUNC; char* uid2uname_utoa(uid_t uid) FAST_FUNC; char* gid2group_utoa(gid_t gid) FAST_FUNC; /* versions which cache results (useful for ps, ls etc) */ const char* get_cached_username(uid_t uid) FAST_FUNC; const char* get_cached_groupname(gid_t gid) FAST_FUNC; void clear_username_cache(void) FAST_FUNC; /* internally usernames are saved in fixed-sized char[] buffers */ enum { USERNAME_MAX_SIZE = 32 - sizeof(uid_t) }; #if ENABLE_FEATURE_CHECK_NAMES void die_if_bad_username(const char* name) FAST_FUNC; #else #define die_if_bad_username(name) ((void)(name)) #endif /* * Returns (-1) terminated malloced result of getgroups(). * Reallocs group_array (useful for repeated calls). * ngroups is an initial size of array. It is rounded up to 32 for realloc. * ngroups is updated on return. * ngroups can be NULL: bb_getgroups(NULL, NULL) is valid usage. * Dies on errors (on Linux, only xrealloc can cause this, not internal getgroups call). */ gid_t *bb_getgroups(int *ngroups, gid_t *group_array) FAST_FUNC; #if ENABLE_FEATURE_UTMP void FAST_FUNC write_new_utmp(pid_t pid, int new_type, const char *tty_name, const char *username, const char *hostname); void FAST_FUNC update_utmp(pid_t pid, int new_type, const char *tty_name, const char *username, const char *hostname); void FAST_FUNC update_utmp_DEAD_PROCESS(pid_t pid); #else # define write_new_utmp(pid, new_type, tty_name, username, hostname) ((void)0) # define update_utmp(pid, new_type, tty_name, username, hostname) ((void)0) # define update_utmp_DEAD_PROCESS(pid) ((void)0) #endif int file_is_executable(const char *name) FAST_FUNC; char *find_executable(const char *filename, char **PATHp) FAST_FUNC; int executable_exists(const char *filename) FAST_FUNC; /* BB_EXECxx always execs (it's not doing NOFORK/NOEXEC stuff), * but it may exec busybox and call applet instead of searching PATH. */ #if ENABLE_FEATURE_PREFER_APPLETS int BB_EXECVP(const char *file, char *const argv[]) FAST_FUNC; #define BB_EXECLP(prog,cmd,...) \ do { \ if (find_applet_by_name(prog) >= 0) \ execlp(bb_busybox_exec_path, cmd, __VA_ARGS__); \ execlp(prog, cmd, __VA_ARGS__); \ } while (0) #else #define BB_EXECVP(prog,cmd) execvp(prog,cmd) #define BB_EXECLP(prog,cmd,...) execlp(prog,cmd,__VA_ARGS__) #endif void BB_EXECVP_or_die(char **argv) NORETURN FAST_FUNC; /* xvfork() can't be a _function_, return after vfork in child mangles stack * in the parent. It must be a macro. */ #define xvfork() \ ({ \ pid_t bb__xvfork_pid = vfork(); \ if (bb__xvfork_pid < 0) \ bb_simple_perror_msg_and_die("vfork"); \ bb__xvfork_pid; \ }) #if BB_MMU pid_t xfork(void) FAST_FUNC; #endif void xvfork_parent_waits_and_exits(void) FAST_FUNC; /* NOMMU friendy fork+exec: */ pid_t spawn(char **argv) FAST_FUNC; pid_t xspawn(char **argv) FAST_FUNC; pid_t safe_waitpid(pid_t pid, int *wstat, int options) FAST_FUNC; pid_t wait_any_nohang(int *wstat) FAST_FUNC; /* wait4pid: unlike waitpid, waits ONLY for one process. * Returns sig + 0x180 if child is killed by signal. * It's safe to pass negative 'pids' from failed [v]fork - * wait4pid will return -1 (and will not clobber [v]fork's errno). * IOW: rc = wait4pid(spawn(argv)); * if (rc < 0) bb_perror_msg("%s", argv[0]); * if (rc > 0) bb_error_msg("exit code: %d", rc & 0xff); */ int wait4pid(pid_t pid) FAST_FUNC; int wait_for_exitstatus(pid_t pid) FAST_FUNC; /************************************************************************/ /* spawn_and_wait/run_nofork_applet/run_applet_no_and_exit need to work */ /* carefully together to reinit some global state while not disturbing */ /* other. Be careful if you change them. Consult docs/nofork_noexec.txt */ /************************************************************************/ /* Same as wait4pid(spawn(argv)), but with NOFORK/NOEXEC if configured: */ int spawn_and_wait(char **argv) FAST_FUNC; /* Does NOT check that applet is NOFORK, just blindly runs it */ int run_nofork_applet(int applet_no, char **argv) FAST_FUNC; void run_noexec_applet_and_exit(int a, const char *name, char **argv) NORETURN FAST_FUNC; #ifndef BUILD_INDIVIDUAL int find_applet_by_name(const char *name) FAST_FUNC; void run_applet_no_and_exit(int a, const char *name, char **argv) NORETURN FAST_FUNC; #endif void show_usage_if_dash_dash_help(int applet_no, char **argv) FAST_FUNC; #if defined(__linux__) int re_execed_comm(void) FAST_FUNC; void set_task_comm(const char *comm) FAST_FUNC; #else # define re_execed_comm() 0 # define set_task_comm(name) ((void)0) #endif void exit_SUCCESS(void) NORETURN FAST_FUNC; void _exit_SUCCESS(void) NORETURN FAST_FUNC; void exit_FAILURE(void) NORETURN FAST_FUNC; void _exit_FAILURE(void) NORETURN FAST_FUNC; /* Helpers for daemonization. * * bb_daemonize(flags) = daemonize, does not compile on NOMMU * * bb_daemonize_or_rexec(flags, argv) = daemonizes on MMU (and ignores argv), * rexec's itself on NOMMU with argv passed as command line. * Thus bb_daemonize_or_rexec may cause your _main() to be re-executed * from the start. (It will detect it and not reexec again second time). * You have to audit carefully that you don't do something twice as a result * (opening files/sockets, parsing config files etc...)! * * Both of the above will redirect fd 0,1,2 to /dev/null and drop ctty * (will do setsid()). * * fork_or_rexec(argv) = bare-bones fork on MMU, * "vfork + re-exec ourself" on NOMMU. No fd redirection, no setsid(). * On MMU ignores argv. * * Helper for network daemons in foreground mode: * * bb_sanitize_stdio() = make sure that fd 0,1,2 are opened by opening them * to /dev/null if they are not. */ enum { DAEMON_CHDIR_ROOT = 1 << 0, DAEMON_DEVNULL_STDIO = 1 << 1, DAEMON_CLOSE_EXTRA_FDS = 1 << 2, DAEMON_ONLY_SANITIZE = 1 << 3, /* internal use */ //DAEMON_DOUBLE_FORK = 1 << 4, /* double fork to avoid controlling tty */ }; #if BB_MMU enum { re_execed = 0 }; # define fork_or_rexec(argv) xfork() # define bb_daemonize_or_rexec(flags, argv) bb_daemonize_or_rexec(flags) # define bb_daemonize(flags) bb_daemonize_or_rexec(flags, bogus) #else extern bool re_execed; /* Note: re_exec() sets argv[0][0] |= 0x80 on NOMMU! * _Parent_ needs to undo it if it doesn't want to have argv[0] mangled. */ void re_exec(char **argv) NORETURN FAST_FUNC; pid_t fork_or_rexec(char **argv) FAST_FUNC; int BUG_fork_is_unavailable_on_nommu(void) FAST_FUNC; int BUG_daemon_is_unavailable_on_nommu(void) FAST_FUNC; void BUG_bb_daemonize_is_unavailable_on_nommu(void) FAST_FUNC; # define fork() BUG_fork_is_unavailable_on_nommu() # define xfork() BUG_fork_is_unavailable_on_nommu() # define daemon(a,b) BUG_daemon_is_unavailable_on_nommu() # define bb_daemonize(a) BUG_bb_daemonize_is_unavailable_on_nommu() #endif void bb_daemonize_or_rexec(int flags, char **argv) FAST_FUNC; void bb_sanitize_stdio(void) FAST_FUNC; #define bb_daemon_helper(arg) bb_daemonize_or_rexec((arg) | DAEMON_ONLY_SANITIZE, NULL) /* Clear dangerous stuff, set PATH. Return 1 if was run by different user. */ int sanitize_env_if_suid(void) FAST_FUNC; /* For top, ps. Some argv[i] are replaced by malloced "-opt" strings */ void make_all_argv_opts(char **argv) FAST_FUNC; char* single_argv(char **argv) FAST_FUNC; extern const char *const bb_argv_dash[]; /* { "-", NULL } */ extern uint32_t option_mask32; uint32_t getopt32(char **argv, const char *applet_opts, ...) FAST_FUNC; # define No_argument "\0" # define Required_argument "\001" # define Optional_argument "\002" #if ENABLE_LONG_OPTS uint32_t getopt32long(char **argv, const char *optstring, const char *longopts, ...) FAST_FUNC; #else #define getopt32long(argv,optstring,longopts,...) \ getopt32(argv,optstring,##__VA_ARGS__) #endif /* BSD-derived getopt() functions require that optind be set to 1 in * order to reset getopt() state. This used to be generally accepted * way of resetting getopt(). However, glibc's getopt() * has additional getopt() state beyond optind (specifically, glibc * extensions such as '+' and '-' at the start of the string), and requires * that optind be set to zero to reset its state. BSD-derived versions * of getopt() misbehaved if optind is set to 0 in order to reset getopt(), * and glibc's getopt() used to coredump if optind is set 1 in order * to reset getopt(). * Then BSD introduced additional variable "optreset" which should be * set to 1 in order to reset getopt(). Sigh. Standards, anyone? * * By ~2008, OpenBSD 3.4 was changed to survive glibc-like optind = 0 * (to interpret it as if optreset was set). */ #if 1 /*def __GLIBC__*/ #define GETOPT_RESET() (optind = 0) #else /* BSD style */ #define GETOPT_RESET() (optind = 1) #endif /* Having next pointer as a first member allows easy creation * of "llist-compatible" structs, and using llist_FOO functions * on them. */ typedef struct llist_t { struct llist_t *link; char *data; } llist_t; void llist_add_to(llist_t **old_head, void *data) FAST_FUNC; void llist_add_to_end(llist_t **list_head, void *data) FAST_FUNC; void *llist_pop(llist_t **elm) FAST_FUNC; void llist_unlink(llist_t **head, llist_t *elm) FAST_FUNC; void llist_free(llist_t *elm, void (*freeit)(void *data)) FAST_FUNC; llist_t *llist_rev(llist_t *list) FAST_FUNC; llist_t *llist_find_str(llist_t *first, const char *str) FAST_FUNC; /* BTW, surprisingly, changing API to * llist_t *llist_add_to(llist_t *old_head, void *data) * etc does not result in smaller code... */ /* start_stop_daemon and udhcpc are special - they want * to create pidfiles regardless of FEATURE_PIDFILE */ #if ENABLE_FEATURE_PIDFILE || defined(WANT_PIDFILE) /* True only if we created pidfile which is *file*, not /dev/null etc */ extern smallint wrote_pidfile; void write_pidfile(const char *path) FAST_FUNC; void write_pidfile_std_path_and_ext(const char *path) FAST_FUNC; void remove_pidfile_std_path_and_ext(const char *path) FAST_FUNC; #define remove_pidfile(path) do { if (wrote_pidfile) unlink(path); } while (0) #else enum { wrote_pidfile = 0 }; #define write_pidfile_std_path_and_ext(path) ((void)0) #define remove_pidfile_std_path_and_ext(path) ((void)0) #define write_pidfile(path) ((void)0) #define remove_pidfile(path) ((void)0) #endif enum { LOGMODE_NONE = 0, LOGMODE_STDIO = (1 << 0), LOGMODE_SYSLOG = (1 << 1) * ENABLE_FEATURE_SYSLOG, LOGMODE_BOTH = LOGMODE_SYSLOG + LOGMODE_STDIO, }; extern const char *msg_eol; extern smallint logmode; extern uint8_t xfunc_error_retval; extern void (*die_func)(void); void xfunc_die(void) NORETURN FAST_FUNC; void bb_show_usage(void) NORETURN FAST_FUNC; void bb_error_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC; void bb_simple_error_msg(const char *s) FAST_FUNC; void bb_error_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC; void bb_simple_error_msg_and_die(const char *s) NORETURN FAST_FUNC; void bb_perror_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC; void bb_simple_perror_msg(const char *s) FAST_FUNC; void bb_perror_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC; void bb_simple_perror_msg_and_die(const char *s) NORETURN FAST_FUNC; void bb_herror_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC; void bb_simple_herror_msg(const char *s) FAST_FUNC; void bb_herror_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC; void bb_simple_herror_msg_and_die(const char *s) NORETURN FAST_FUNC; void bb_perror_nomsg_and_die(void) NORETURN FAST_FUNC; void bb_perror_nomsg(void) FAST_FUNC; void bb_verror_msg(const char *s, va_list p, const char *strerr) FAST_FUNC; void bb_die_memory_exhausted(void) NORETURN FAST_FUNC; void bb_logenv_override(void) FAST_FUNC; #if ENABLE_FEATURE_SYSLOG_INFO void bb_info_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC; void bb_simple_info_msg(const char *s) FAST_FUNC; void bb_vinfo_msg(const char *s, va_list p) FAST_FUNC; #else #define bb_info_msg bb_error_msg #define bb_simple_info_msg bb_simple_error_msg #define bb_vinfo_msg(s,p) bb_verror_msg(s,p,NULL) #endif #if ENABLE_WARN_SIMPLE_MSG /* If enabled, cause calls to bb_error_msg() et al that only take a single * parameter to generate a warning. */ static inline void __attribute__ ((deprecated("use bb_simple_error_msg instead"))) bb_not_simple_error_msg(const char *s) { bb_simple_error_msg(s); } static inline void __attribute__ ((deprecated("use bb_simple_error_msg_and_die instead"))) NORETURN bb_not_simple_error_msg_and_die(const char *s) { bb_simple_error_msg_and_die(s); } static inline void __attribute__ ((deprecated("use bb_simple_perror_msg instead"))) bb_not_simple_perror_msg(const char *s) { bb_simple_perror_msg(s); } static inline void __attribute__ ((deprecated("use bb_simple_perror_msg_and_die instead"))) NORETURN bb_not_simple_perror_msg_and_die(const char *s) { bb_simple_perror_msg_and_die(s); } static inline void __attribute__ ((deprecated("use bb_simple_herror_msg instead"))) bb_not_simple_herror_msg(const char *s) { bb_simple_herror_msg(s); } static inline void __attribute__ ((deprecated("use bb_simple_herror_msg_and_die instead"))) NORETURN bb_not_simple_herror_msg_and_die(const char *s) { bb_simple_herror_msg_and_die(s); } static inline void __attribute__ ((deprecated("use bb_simple_info_msg instead"))) bb_not_simple_info_msg(const char *s) { bb_simple_info_msg(s); } /* Override bb_error_msg() and related functions with macros that will * substitute them for the equivalent bb_not_simple_error_msg() function when * they are used with only a single parameter. Macro approach inspired by * https://gustedt.wordpress.com/2010/06/08/detect-empty-macro-arguments and * https://gustedt.wordpress.com/2010/06/03/default-arguments-for-c99 */ #define _ARG18(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, _16, _17, ...) _17 #define BB_MSG_KIND(...) _ARG18(__VA_ARGS__, , , , , , , , , , , , , , , , , _not_simple) #define _BB_MSG(name, kind, ...) bb##kind##name(__VA_ARGS__) #define BB_MSG(name, kind, ...) _BB_MSG(name, kind, __VA_ARGS__) #define bb_error_msg(...) BB_MSG(_error_msg, BB_MSG_KIND(__VA_ARGS__), __VA_ARGS__) #define bb_error_msg_and_die(...) BB_MSG(_error_msg_and_die, BB_MSG_KIND(__VA_ARGS__), __VA_ARGS__) #define bb_perror_msg(...) BB_MSG(_perror_msg, BB_MSG_KIND(__VA_ARGS__), __VA_ARGS__) #define bb_perror_msg_and_die(...) BB_MSG(_perror_msg_and_die, BB_MSG_KIND(__VA_ARGS__), __VA_ARGS__) #define bb_herror_msg(...) BB_MSG(_herror_msg, BB_MSG_KIND(__VA_ARGS__), __VA_ARGS__) #define bb_herror_msg_and_die(...) BB_MSG(_herror_msg_and_die, BB_MSG_KIND(__VA_ARGS__), __VA_ARGS__) #if ENABLE_FEATURE_SYSLOG_INFO #define bb_info_msg(...) BB_MSG(_info_msg, BB_MSG_KIND(__VA_ARGS__), __VA_ARGS__) #endif #endif /* We need to export XXX_main from libbusybox * only if we build "individual" binaries */ #if ENABLE_FEATURE_INDIVIDUAL #define MAIN_EXTERNALLY_VISIBLE EXTERNALLY_VISIBLE #else #define MAIN_EXTERNALLY_VISIBLE #endif /* Embedded script support */ char *get_script_content(unsigned n) FAST_FUNC; int scripted_main(int argc, char** argv) MAIN_EXTERNALLY_VISIBLE; /* Applets which are useful from another applets */ int bb_cat(char** argv) FAST_FUNC; int ash_main(int argc, char** argv) IF_SHELL_ASH(MAIN_EXTERNALLY_VISIBLE); int hush_main(int argc, char** argv) IF_SHELL_HUSH(MAIN_EXTERNALLY_VISIBLE); /* If shell needs them, they exist even if not enabled as applets */ int echo_main(int argc, char** argv) IF_ECHO(MAIN_EXTERNALLY_VISIBLE); int sleep_main(int argc, char **argv) IF_SLEEP(MAIN_EXTERNALLY_VISIBLE); int printf_main(int argc, char **argv) IF_PRINTF(MAIN_EXTERNALLY_VISIBLE); int test_main(int argc, char **argv) #if ENABLE_TEST || ENABLE_TEST1 || ENABLE_TEST2 MAIN_EXTERNALLY_VISIBLE #endif ; int kill_main(int argc, char **argv) #if ENABLE_KILL || ENABLE_KILLALL || ENABLE_KILLALL5 MAIN_EXTERNALLY_VISIBLE #endif ; /* Similar, but used by chgrp, not shell */ int chown_main(int argc, char **argv) IF_CHOWN(MAIN_EXTERNALLY_VISIBLE); /* Used by ftpd */ int ls_main(int argc, char **argv) IF_LS(MAIN_EXTERNALLY_VISIBLE); /* Don't need IF_xxx() guard for these */ int gunzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int bunzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; #if ENABLE_ROUTE void bb_displayroutes(int noresolve, int netstatfmt) FAST_FUNC; #endif struct number_state { unsigned width; unsigned start; unsigned inc; const char *sep; const char *empty_str; smallint all, nonempty; }; int print_numbered_lines(struct number_state *ns, const char *filename) FAST_FUNC; /* Networking */ /* This structure defines protocol families and their handlers. */ struct aftype { const char *name; const char *title; int af; int alen; char* FAST_FUNC (*print)(unsigned char *); const char* FAST_FUNC (*sprint)(struct sockaddr *, int numeric); int FAST_FUNC (*input)(/*int type,*/ const char *bufp, struct sockaddr *); void FAST_FUNC (*herror)(char *text); int FAST_FUNC (*rprint)(int options); int FAST_FUNC (*rinput)(int typ, int ext, char **argv); /* may modify src */ int FAST_FUNC (*getmask)(char *src, struct sockaddr *mask, char *name); }; /* This structure defines hardware protocols and their handlers. */ struct hwtype { const char *name; const char *title; int type; int alen; char* FAST_FUNC (*print)(unsigned char *); int FAST_FUNC (*input)(const char *, struct sockaddr *); int FAST_FUNC (*activate)(int fd); int suppress_null_addr; }; #define IFNAME_SHOW_DOWNED_TOO ((char*)(intptr_t)1) int display_interfaces(char *ifname) FAST_FUNC; int in_ether(const char *bufp, struct sockaddr *sap) FAST_FUNC; #if ENABLE_FEATURE_HWIB int in_ib(const char *bufp, struct sockaddr *sap) FAST_FUNC; #else #define in_ib(a, b) 1 /* fail */ #endif const struct aftype *get_aftype(const char *name) FAST_FUNC; const struct hwtype *get_hwtype(const char *name) FAST_FUNC; const struct hwtype *get_hwntype(int type) FAST_FUNC; extern int fstype_matches(const char *fstype, const char *comma_list) FAST_FUNC; #ifdef HAVE_MNTENT_H extern struct mntent *find_mount_point(const char *name, int subdir_too) FAST_FUNC; #endif extern void erase_mtab(const char * name) FAST_FUNC; extern unsigned int tty_baud_to_value(speed_t speed) FAST_FUNC; extern speed_t tty_value_to_baud(unsigned int value) FAST_FUNC; #if ENABLE_DESKTOP extern void bb_warn_ignoring_args(char *arg) FAST_FUNC; #else # define bb_warn_ignoring_args(arg) ((void)0) #endif extern int get_linux_version_code(void) FAST_FUNC; char *query_loop(const char *device) FAST_FUNC; int get_free_loop(void) FAST_FUNC; int del_loop(const char *device) FAST_FUNC; /* * If *devname is not NULL, use that name, otherwise try to find free one, * malloc and return it in *devname. * return value is the opened fd to the loop device, or < on error */ int set_loop(char **devname, const char *file, unsigned long long offset, unsigned long long sizelimit, unsigned flags) FAST_FUNC; /* These constants match linux/loop.h (without BB_ prefix): */ #define BB_LO_FLAGS_READ_ONLY 1 #define BB_LO_FLAGS_AUTOCLEAR 4 #define BB_LO_FLAGS_PARTSCAN 8 /* Returns malloced str */ char *bb_ask_noecho(int fd, int timeout, const char *prompt) FAST_FUNC; /* Like bb_ask_noecho, but asks on stdin with no timeout. */ char *bb_ask_noecho_stdin(const char *prompt) FAST_FUNC; int bb_ask_y_confirmation_FILE(FILE *fp) FAST_FUNC; int bb_ask_y_confirmation(void) FAST_FUNC; /* Returns -1 if input is invalid. cur_mode is a base for e.g. "u+rw" */ int bb_parse_mode(const char* s, unsigned cur_mode) FAST_FUNC; /* * Config file parser */ enum { PARSE_COLLAPSE = 0x00010000, // treat consecutive delimiters as one PARSE_TRIM = 0x00020000, // trim leading and trailing delimiters // TODO: COLLAPSE and TRIM seem to always go in pair PARSE_GREEDY = 0x00040000, // last token takes entire remainder of the line PARSE_MIN_DIE = 0x00100000, // die if < min tokens found // keep a copy of current line PARSE_KEEP_COPY = 0x00200000 * ENABLE_FEATURE_CROND_D, PARSE_EOL_COMMENTS = 0x00400000, // comments are recognized even if they aren't the first char PARSE_ALT_COMMENTS = 0x00800000, // delim[0] and delim[1] are two different allowed comment chars // (so far, delim[0] will only work as comment char for full-line comment) // (IOW: it works as if PARSE_EOL_COMMENTS is not set. sysctl applet is okay with this) PARSE_WS_COMMENTS = 0x01000000, // comments are recognized even if there is whitespace before // ("line start>#comment" is also comment, not only "line start>#comment") // NORMAL is: // * remove leading and trailing delimiters and collapse // multiple delimiters into one // * warn and continue if less than mintokens delimiters found // * grab everything into last token // * comments are recognized even if they aren't the first char PARSE_NORMAL = PARSE_COLLAPSE | PARSE_TRIM | PARSE_GREEDY | PARSE_EOL_COMMENTS, }; typedef struct parser_t { FILE *fp; char *data; char *line, *nline; size_t line_alloc, nline_alloc; int lineno; } parser_t; parser_t* config_open(const char *filename) FAST_FUNC; parser_t* config_open2(const char *filename, FILE* FAST_FUNC (*fopen_func)(const char *path)) FAST_FUNC; /* delims[0] is a comment char (use '\0' to disable), the rest are token delimiters */ int config_read(parser_t *parser, char **tokens, unsigned flags, const char *delims) FAST_FUNC; #define config_read(parser, tokens, max, min, str, flags) \ config_read(parser, tokens, ((flags) | (((min) & 0xFF) << 8) | ((max) & 0xFF)), str) void config_close(parser_t *parser) FAST_FUNC; /* Concatenate path and filename to new allocated buffer. * Add "/" only as needed (no duplicate "//" are produced). * If path is NULL, it is assumed to be "/". * filename should not be NULL. */ char *concat_path_file(const char *path, const char *filename) FAST_FUNC; /* Returns NULL on . and .. */ char *concat_subpath_file(const char *path, const char *filename) FAST_FUNC; int bb_make_directory(char *path, long mode, int flags) FAST_FUNC; int get_signum(const char *name) FAST_FUNC; const char *get_signame(int number) FAST_FUNC; void print_signames(void) FAST_FUNC; char *bb_simplify_path(const char *path) FAST_FUNC; /* Returns ptr to NUL */ char *bb_simplify_abs_path_inplace(char *path) FAST_FUNC; void pause_after_failed_login(void) FAST_FUNC; void bb_do_delay(unsigned seconds) FAST_FUNC; void msleep(unsigned ms) FAST_FUNC; void sleep1(void) FAST_FUNC; void change_identity(const struct passwd *pw) FAST_FUNC; void exec_shell(const char *shell, int loginshell, const char **args) NORETURN FAST_FUNC; void exec_login_shell(const char *shell) NORETURN FAST_FUNC; void exec_prog_or_SHELL(char **argv) NORETURN FAST_FUNC; /* Returns $SHELL, getpwuid(getuid())->pw_shell, or DEFAULT_SHELL. * Note that getpwuid result might need xstrdup'ing * if there is a possibility of intervening getpwxxx() calls. */ const char *get_shell_name(void) FAST_FUNC; #if ENABLE_FEATURE_SETPRIV_CAPABILITIES || ENABLE_RUN_INIT unsigned cap_name_to_number(const char *cap) FAST_FUNC; void printf_cap(const char *pfx, unsigned cap_no) FAST_FUNC; void drop_capability(int cap_ordinal) FAST_FUNC; /* Structures inside "struct caps" are Linux-specific and libcap-specific: */ #define DEFINE_STRUCT_CAPS \ struct caps { \ struct __user_cap_header_struct header; \ unsigned u32s; \ struct __user_cap_data_struct data[2]; \ } void getcaps(void *caps) FAST_FUNC; #endif #if ENABLE_SELINUX extern void renew_current_security_context(void) FAST_FUNC; extern void set_current_security_context(security_context_t sid) FAST_FUNC; extern context_t set_security_context_component(security_context_t cur_context, char *user, char *role, char *type, char *range) FAST_FUNC; extern void setfscreatecon_or_die(security_context_t scontext) FAST_FUNC; extern void selinux_preserve_fcontext(int fdesc) FAST_FUNC; #else #define selinux_preserve_fcontext(fdesc) ((void)0) #endif extern void selinux_or_die(void) FAST_FUNC; /* setup_environment: * if SETUP_ENV_CHDIR: * if cd(pw->pw_dir): ok: else if SETUP_ENV_TO_TMP: cd(/tmp) else: cd(/) or die * if SETUP_ENV_CLEARENV: cd(pw->pw_dir), clear environment, then set * TERM=(old value) * USER=pw->pw_name, LOGNAME=pw->pw_name * PATH=bb_default_[root_]path * HOME=pw->pw_dir * SHELL=shell * else if SETUP_ENV_CHANGEENV | SETUP_ENV_CHANGEENV_LOGNAME: * if not root (if pw->pw_uid != 0) or if SETUP_ENV_CHANGEENV_LOGNAME: * USER=pw->pw_name, LOGNAME=pw->pw_name * HOME=pw->pw_dir * SHELL=shell * else does nothing * * NB: CHANGEENV and CLEARENV use setenv() - this leaks memory! * If setup_environment() is used is vforked child, this leaks memory _in parent too_! */ #define SETUP_ENV_CHANGEENV (1 << 0) #define SETUP_ENV_CHANGEENV_LOGNAME (1 << 1) #define SETUP_ENV_CLEARENV (1 << 2) #define SETUP_ENV_TO_TMP (1 << 3) #define SETUP_ENV_CHDIR (1 << 4) void setup_environment(const char *shell, int flags, const struct passwd *pw) FAST_FUNC; void nuke_str(char *str) FAST_FUNC; #if ENABLE_FEATURE_SECURETTY && !ENABLE_PAM int is_tty_secure(const char *short_tty) FAST_FUNC; #else static ALWAYS_INLINE int is_tty_secure(const char *short_tty UNUSED_PARAM) { return 1; } #endif #define CHECKPASS_PW_HAS_EMPTY_PASSWORD 2 int check_password(const struct passwd *pw, const char *plaintext) FAST_FUNC; int ask_and_check_password_extended(const struct passwd *pw, int timeout, const char *prompt) FAST_FUNC; int ask_and_check_password(const struct passwd *pw) FAST_FUNC; /* Returns a malloced string */ #if !ENABLE_USE_BB_CRYPT #define pw_encrypt(clear, salt, cleanup) pw_encrypt(clear, salt) #endif extern char *pw_encrypt(const char *clear, const char *salt, int cleanup) FAST_FUNC; extern int obscure(const char *old, const char *newval, const struct passwd *pwdp) FAST_FUNC; /* * rnd is additional random input. New one is returned. * Useful if you call crypt_make_salt many times in a row: * rnd = crypt_make_salt(buf1, 4, 0); * rnd = crypt_make_salt(buf2, 4, rnd); * rnd = crypt_make_salt(buf3, 4, rnd); * (otherwise we risk having same salt generated) */ extern int crypt_make_salt(char *p, int cnt /*, int rnd*/) FAST_FUNC; /* "$N$" + sha_salt_16_bytes + NUL */ #define MAX_PW_SALT_LEN (3 + 16 + 1) extern char* crypt_make_pw_salt(char p[MAX_PW_SALT_LEN], const char *algo) FAST_FUNC; /* Returns number of lines changed, or -1 on error */ #if !(ENABLE_FEATURE_ADDUSER_TO_GROUP || ENABLE_FEATURE_DEL_USER_FROM_GROUP) #define update_passwd(filename, username, data, member) \ update_passwd(filename, username, data) #endif extern int update_passwd(const char *filename, const char *username, const char *data, const char *member) FAST_FUNC; int index_in_str_array(const char *const string_array[], const char *key) FAST_FUNC; int index_in_strings(const char *strings, const char *key) FAST_FUNC; int index_in_substr_array(const char *const string_array[], const char *key) FAST_FUNC; int index_in_substrings(const char *strings, const char *key) FAST_FUNC; const char *nth_string(const char *strings, int n) FAST_FUNC; extern void print_login_issue(const char *issue_file, const char *tty) FAST_FUNC; extern void print_login_prompt(void) FAST_FUNC; char *xmalloc_ttyname(int fd) FAST_FUNC RETURNS_MALLOC; int is_TERM_dumb(void) FAST_FUNC; /* NB: typically you want to pass fd 0, not 1. Think 'applet | grep something' */ int get_terminal_width_height(int fd, unsigned *width, unsigned *height) FAST_FUNC; int get_terminal_width(int fd) FAST_FUNC; int tcsetattr_stdin_TCSANOW(const struct termios *tp) FAST_FUNC; #define TERMIOS_CLEAR_ISIG (1 << 0) #define TERMIOS_RAW_CRNL_INPUT (1 << 1) #define TERMIOS_RAW_CRNL_OUTPUT (1 << 2) #define TERMIOS_RAW_CRNL (TERMIOS_RAW_CRNL_INPUT|TERMIOS_RAW_CRNL_OUTPUT) #define TERMIOS_RAW_INPUT (1 << 3) int get_termios_and_make_raw(int fd, struct termios *newterm, struct termios *oldterm, int flags) FAST_FUNC; int set_termios_to_raw(int fd, struct termios *oldterm, int flags) FAST_FUNC; /* NB: "unsigned request" is crucial! "int request" will break some arches! */ int ioctl_or_perror(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))) FAST_FUNC; int ioctl_or_perror_and_die(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))) FAST_FUNC; #if ENABLE_IOCTL_HEX2STR_ERROR int bb_ioctl_or_warn(int fd, unsigned request, void *argp, const char *ioctl_name) FAST_FUNC; int bb_xioctl(int fd, unsigned request, void *argp, const char *ioctl_name) FAST_FUNC; #define ioctl_or_warn(fd,request,argp) bb_ioctl_or_warn(fd,request,argp,#request) #define xioctl(fd,request,argp) bb_xioctl(fd,request,argp,#request) #else int bb_ioctl_or_warn(int fd, unsigned request, void *argp) FAST_FUNC; int bb_xioctl(int fd, unsigned request, void *argp) FAST_FUNC; #define ioctl_or_warn(fd,request,argp) bb_ioctl_or_warn(fd,request,argp) #define xioctl(fd,request,argp) bb_xioctl(fd,request,argp) #endif char *is_in_ino_dev_hashtable(const struct stat *statbuf) FAST_FUNC; void add_to_ino_dev_hashtable(const struct stat *statbuf, const char *name) FAST_FUNC; void reset_ino_dev_hashtable(void) FAST_FUNC; #ifdef __GLIBC__ /* At least glibc has horrendously large inline for this, so wrap it */ unsigned long long bb_makedev(unsigned major, unsigned minor) FAST_FUNC; #undef makedev #define makedev(a,b) bb_makedev(a,b) #endif /* "Keycodes" that report an escape sequence. * We use something which fits into signed char, * yet doesn't represent any valid Unicode character. * Also, -1 is reserved for error indication and we don't use it. */ enum { KEYCODE_UP = -2, KEYCODE_DOWN = -3, KEYCODE_RIGHT = -4, KEYCODE_LEFT = -5, KEYCODE_HOME = -6, KEYCODE_END = -7, KEYCODE_INSERT = -8, KEYCODE_DELETE = -9, KEYCODE_PAGEUP = -10, KEYCODE_PAGEDOWN = -11, KEYCODE_BACKSPACE = -12, /* Used only if Alt/Ctrl/Shifted */ KEYCODE_D = -13, /* Used only if Alted */ #if 0 KEYCODE_FUN1 = , KEYCODE_FUN2 = , KEYCODE_FUN3 = , KEYCODE_FUN4 = , KEYCODE_FUN5 = , KEYCODE_FUN6 = , KEYCODE_FUN7 = , KEYCODE_FUN8 = , KEYCODE_FUN9 = , KEYCODE_FUN10 = , KEYCODE_FUN11 = , KEYCODE_FUN12 = , #endif /* ^^^^^ Be sure that last defined value is small enough. * Current read_key() code allows going up to -32 (0xfff..fffe0). * This gives three upper bits in LSB to play with: * KEYCODE_foo values are 0xfff..fffXX, lowest XX bits are: scavvvvv, * s=0 if SHIFT, c=0 if CTRL, a=0 if ALT, * vvvvv bits are the same for same key regardless of "shift bits". */ //KEYCODE_SHIFT_... = KEYCODE_... & ~0x80, KEYCODE_CTRL_RIGHT = KEYCODE_RIGHT & ~0x40, KEYCODE_CTRL_LEFT = KEYCODE_LEFT & ~0x40, KEYCODE_ALT_RIGHT = KEYCODE_RIGHT & ~0x20, KEYCODE_ALT_LEFT = KEYCODE_LEFT & ~0x20, KEYCODE_ALT_BACKSPACE = KEYCODE_BACKSPACE & ~0x20, KEYCODE_ALT_D = KEYCODE_D & ~0x20, KEYCODE_CURSOR_POS = -0x100, /* 0xfff..fff00 */ /* How long is the longest ESC sequence we know? * We want it big enough to be able to contain * cursor position sequence "ESC [ 9999 ; 9999 R" */ KEYCODE_BUFFER_SIZE = 16 }; /* Note: fd may be in blocking or non-blocking mode, both make sense. * For one, less uses non-blocking mode. * Only the first read syscall inside read_key may block indefinitely * (unless fd is in non-blocking mode), * subsequent reads will time out after a few milliseconds. * Return of -1 means EOF or error (errno == 0 on EOF). * Nonzero errno is not preserved across the call: * if there was no error, errno will be cleared to 0. * buffer[0] is used as a counter of buffered chars and must be 0 * on first call. * timeout: * -2: do not poll(-1) for input - read() it, return on EAGAIN at once * -1: poll(-1) (i.e. block even on NONBLOCKed fd) * >=0: poll() for TIMEOUT milliseconds, return -1/EAGAIN on timeout */ int64_t read_key(int fd, char *buffer, int timeout) FAST_FUNC; /* This version loops on EINTR: */ int64_t safe_read_key(int fd, char *buffer, int timeout) FAST_FUNC; void read_key_ungets(char *buffer, const char *str, unsigned len) FAST_FUNC; #if ENABLE_FEATURE_EDITING /* It's NOT just ENABLEd or disabled. It's a number: */ # if defined CONFIG_FEATURE_EDITING_HISTORY && CONFIG_FEATURE_EDITING_HISTORY > 0 # define MAX_HISTORY (CONFIG_FEATURE_EDITING_HISTORY + 0) unsigned size_from_HISTFILESIZE(const char *hp) FAST_FUNC; # else # define MAX_HISTORY 0 # endif typedef const char *get_exe_name_t(int i) FAST_FUNC; typedef const char *sh_get_var_t(const char *name) FAST_FUNC; typedef struct line_input_t { int flags; int timeout; # if ENABLE_FEATURE_TAB_COMPLETION # if ENABLE_SHELL_ASH const char *path_lookup; # define EDITING_HAS_path_lookup 1 # else # define EDITING_HAS_path_lookup 0 # endif # if ENABLE_SHELL_ASH || ENABLE_SHELL_HUSH /* function to fetch additional application-specific names to match */ get_exe_name_t *get_exe_name; # endif # endif # if (ENABLE_FEATURE_USERNAME_COMPLETION || ENABLE_FEATURE_EDITING_FANCY_PROMPT) \ && (ENABLE_SHELL_ASH || ENABLE_SHELL_HUSH) /* function to fetch value of shell variable */ sh_get_var_t *sh_get_var; # define EDITING_HAS_sh_get_var 1 # else # define EDITING_HAS_sh_get_var 0 # endif # if MAX_HISTORY int cnt_history; int cur_history; int max_history; /* must never be <= 0 */ # if ENABLE_FEATURE_EDITING_SAVEHISTORY /* meaning of this field depends on FEATURE_EDITING_SAVE_ON_EXIT: * if !FEATURE_EDITING_SAVE_ON_EXIT: "how many lines are * in on-disk history" * if FEATURE_EDITING_SAVE_ON_EXIT: "how many in-memory lines are * also in on-disk history (and thus need to be skipped on save)" */ unsigned cnt_history_in_file; const char *hist_file; # endif char *history[MAX_HISTORY + 1]; # endif } line_input_t; enum { DO_HISTORY = 1 * (MAX_HISTORY > 0), TAB_COMPLETION = 2 * ENABLE_FEATURE_TAB_COMPLETION, USERNAME_COMPLETION = 4 * ENABLE_FEATURE_USERNAME_COMPLETION, VI_MODE = 8 * ENABLE_FEATURE_EDITING_VI, WITH_PATH_LOOKUP = 0x10, LI_INTERRUPTIBLE = 0x20, FOR_SHELL = DO_HISTORY | TAB_COMPLETION | USERNAME_COMPLETION | LI_INTERRUPTIBLE, }; line_input_t *new_line_input_t(int flags) FAST_FUNC; #if ENABLE_FEATURE_EDITING_SAVEHISTORY void free_line_input_t(line_input_t *n) FAST_FUNC; #else # define free_line_input_t(n) free(n) #endif /* * maxsize must be >= 2. * Returns: * -1 on read errors or EOF, or on bare Ctrl-D, * 0 on ctrl-C (the line entered is still returned in 'command'), * >0 length of input string, including terminating '\n' */ int read_line_input(line_input_t *st, const char *prompt, char *command, int maxsize) FAST_FUNC; void show_history(const line_input_t *st) FAST_FUNC; # if ENABLE_FEATURE_EDITING_SAVE_ON_EXIT void save_history(line_input_t *st); # endif #else #define MAX_HISTORY 0 int read_line_input(const char* prompt, char* command, int maxsize) FAST_FUNC; #define read_line_input(state, prompt, command, maxsize) \ read_line_input(prompt, command, maxsize) #endif #ifndef COMM_LEN # ifdef TASK_COMM_LEN enum { COMM_LEN = TASK_COMM_LEN }; # else /* synchronize with sizeof(task_struct.comm) in /usr/include/linux/sched.h */ enum { COMM_LEN = 16 }; # endif #endif struct smaprec { unsigned long mapped_rw; unsigned long mapped_ro; unsigned long shared_clean; unsigned long shared_dirty; unsigned long private_clean; unsigned long private_dirty; unsigned long stack; unsigned long smap_pss, smap_swap; unsigned long smap_size; // For mixed 32/64 userspace, 32-bit pmap still needs // 64-bit field here to correctly show 64-bit processes: unsigned long long smap_start; // (strictly speaking, other fields need to be wider too, // but they are in kbytes, not bytes, and they hold sizes, // not start addresses, sizes tend to be less than 4 terabytes) char smap_mode[5]; char *smap_name; }; #if !ENABLE_PMAP #define procps_read_smaps(pid, total, cb, data) \ procps_read_smaps(pid, total) #endif int FAST_FUNC procps_read_smaps(pid_t pid, struct smaprec *total, void (*cb)(struct smaprec *, void *), void *data); typedef struct procps_status_t { DIR *dir; IF_FEATURE_SHOW_THREADS(DIR *task_dir;) uint8_t shift_pages_to_bytes; uint8_t shift_pages_to_kb; /* Fields are set to 0/NULL if failed to determine (or not requested) */ uint16_t argv_len; char *argv0; char *exe; IF_SELINUX(char *context;) IF_FEATURE_SHOW_THREADS(unsigned main_thread_pid;) /* Everything below must contain no ptrs to malloc'ed data: * it is memset(0) for each process in procps_scan() */ unsigned long vsz, rss; /* we round it to kbytes */ unsigned long stime, utime; unsigned long start_time; unsigned pid; unsigned ppid; unsigned pgid; unsigned sid; unsigned uid; unsigned gid; #if ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS unsigned ruid; unsigned rgid; int niceness; #endif unsigned tty_major,tty_minor; #if ENABLE_FEATURE_TOPMEM struct smaprec smaps; #endif char state[4]; /* basename of executable in exec(2), read from /proc/N/stat * (if executable is symlink or script, it is NOT replaced * by link target or interpreter name) */ char comm[COMM_LEN]; /* user/group? - use passwd/group parsing functions */ #if ENABLE_FEATURE_TOP_SMP_PROCESS int last_seen_on_cpu; #endif } procps_status_t; /* flag bits for procps_scan(xx, flags) calls */ enum { PSSCAN_PID = 1 << 0, PSSCAN_PPID = 1 << 1, PSSCAN_PGID = 1 << 2, PSSCAN_SID = 1 << 3, PSSCAN_UIDGID = 1 << 4, PSSCAN_COMM = 1 << 5, /* PSSCAN_CMD = 1 << 6, - use read_cmdline instead */ PSSCAN_ARGV0 = 1 << 7, PSSCAN_EXE = 1 << 8, PSSCAN_STATE = 1 << 9, PSSCAN_VSZ = 1 << 10, PSSCAN_RSS = 1 << 11, PSSCAN_STIME = 1 << 12, PSSCAN_UTIME = 1 << 13, PSSCAN_TTY = 1 << 14, PSSCAN_SMAPS = (1 << 15) * ENABLE_FEATURE_TOPMEM, /* NB: used by find_pid_by_name(). Any applet using it * needs to be mentioned here. */ PSSCAN_ARGVN = (1 << 16) * (ENABLE_KILLALL || ENABLE_PGREP || ENABLE_PKILL || ENABLE_PIDOF || ENABLE_SESTATUS ), PSSCAN_CONTEXT = (1 << 17) * ENABLE_SELINUX, PSSCAN_START_TIME = 1 << 18, PSSCAN_CPU = (1 << 19) * ENABLE_FEATURE_TOP_SMP_PROCESS, PSSCAN_NICE = (1 << 20) * ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS, PSSCAN_RUIDGID = (1 << 21) * ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS, PSSCAN_TASKS = (1 << 22) * ENABLE_FEATURE_SHOW_THREADS, }; //procps_status_t* alloc_procps_scan(void) FAST_FUNC; void free_procps_scan(procps_status_t* sp) FAST_FUNC; procps_status_t* procps_scan(procps_status_t* sp, int flags) FAST_FUNC; /* Format cmdline (up to col chars) into char buf[size] */ /* Puts [comm] if cmdline is empty (-> process is a kernel thread) */ void read_cmdline(char *buf, int size, unsigned pid, const char *comm) FAST_FUNC; pid_t *find_pid_by_name(const char* procName) FAST_FUNC; pid_t *pidlist_reverse(pid_t *pidList) FAST_FUNC; int starts_with_cpu(const char *str) FAST_FUNC; unsigned get_cpu_count(void) FAST_FUNC; /* Use strict=1 if you process input from untrusted source: * it will return NULL on invalid %xx (bad hex chars) * and str + 1 if decoded char is / or NUL. * In non-strict mode, it always succeeds (returns str), * and also it additionally decoded '+' to space. */ char *percent_decode_in_place(char *str, int strict) FAST_FUNC; extern const char bb_uuenc_tbl_base64[] ALIGN1; extern const char bb_uuenc_tbl_base32[] ALIGN1; extern const char bb_uuenc_tbl_std[] ALIGN1; void bb_uuencode(char *store, const void *s, int length, const char *tbl) FAST_FUNC; enum { BASE64_FLAG_UU_STOP = 0x100, BASE64_32 = 0x200, /* base32 */ /* Sign-extends to a value which never matches fgetc result: */ BASE64_FLAG_NO_STOP_CHAR = 0x80, }; char *decode_base64(char *dst, const char **pp_src) FAST_FUNC; char *decode_base32(char *dst, const char **pp_src) FAST_FUNC; void read_base64(FILE *src_stream, FILE *dst_stream, int flags) FAST_FUNC; typedef struct md5_ctx_t { uint8_t wbuffer[64]; /* always correctly aligned for uint64_t */ void (*process_block)(struct md5_ctx_t*) FAST_FUNC; uint64_t total64; /* must be directly before hash[] */ uint32_t hash[8]; /* 4 elements for md5, 5 for sha1, 8 for sha256 */ } md5_ctx_t; typedef struct md5_ctx_t sha1_ctx_t; typedef struct md5_ctx_t sha256_ctx_t; typedef struct sha512_ctx_t { uint64_t total64[2]; /* must be directly before hash[] */ uint64_t hash[8]; uint8_t wbuffer[128]; /* always correctly aligned for uint64_t */ } sha512_ctx_t; typedef struct sha3_ctx_t { uint64_t state[25]; unsigned bytes_queued; unsigned input_block_bytes; } sha3_ctx_t; void md5_begin(md5_ctx_t *ctx) FAST_FUNC; void md5_hash(md5_ctx_t *ctx, const void *buffer, size_t len) FAST_FUNC; unsigned md5_end(md5_ctx_t *ctx, void *resbuf) FAST_FUNC; void sha1_begin(sha1_ctx_t *ctx) FAST_FUNC; #define sha1_hash md5_hash unsigned sha1_end(sha1_ctx_t *ctx, void *resbuf) FAST_FUNC; void sha256_begin(sha256_ctx_t *ctx) FAST_FUNC; #define sha256_hash md5_hash #define sha256_end sha1_end void sha512_begin(sha512_ctx_t *ctx) FAST_FUNC; void sha512_hash(sha512_ctx_t *ctx, const void *buffer, size_t len) FAST_FUNC; unsigned sha512_end(sha512_ctx_t *ctx, void *resbuf) FAST_FUNC; void sha3_begin(sha3_ctx_t *ctx) FAST_FUNC; void sha3_hash(sha3_ctx_t *ctx, const void *buffer, size_t len) FAST_FUNC; unsigned sha3_end(sha3_ctx_t *ctx, void *resbuf) FAST_FUNC; /* TLS benefits from knowing that sha1 and sha256 share these. Give them "agnostic" names too */ typedef struct md5_ctx_t md5sha_ctx_t; #define md5sha_hash md5_hash #define sha_end sha1_end enum { MD5_OUTSIZE = 16, SHA1_OUTSIZE = 20, SHA256_OUTSIZE = 32, SHA512_OUTSIZE = 64, SHA3_OUTSIZE = 28, }; extern uint32_t *global_crc32_table; uint32_t *crc32_filltable(uint32_t *tbl256, int endian) FAST_FUNC; uint32_t *crc32_new_table_le(void) FAST_FUNC; uint32_t *global_crc32_new_table_le(void) FAST_FUNC; uint32_t crc32_block_endian1(uint32_t val, const void *buf, unsigned len, uint32_t *crc_table) FAST_FUNC; uint32_t crc32_block_endian0(uint32_t val, const void *buf, unsigned len, uint32_t *crc_table) FAST_FUNC; typedef struct masks_labels_t { const char *labels; const int masks[]; } masks_labels_t; int print_flags_separated(const int *masks, const char *labels, int flags, const char *separator) FAST_FUNC; int print_flags(const masks_labels_t *ml, int flags) FAST_FUNC; typedef struct bb_progress_t { unsigned last_size; unsigned last_update_sec; unsigned last_change_sec; unsigned start_sec; /*unsigned last_eta;*/ const char *curfile; } bb_progress_t; #define is_bb_progress_inited(p) ((p)->curfile != NULL) #define bb_progress_free(p) do { \ if (ENABLE_UNICODE_SUPPORT) free((char*)((p)->curfile)); \ (p)->curfile = NULL; \ } while (0) void bb_progress_init(bb_progress_t *p, const char *curfile) FAST_FUNC; int bb_progress_update(bb_progress_t *p, uoff_t beg_range, uoff_t transferred, uoff_t totalsize) FAST_FUNC; unsigned ubi_devnum_from_devname(const char *str) FAST_FUNC; int ubi_get_volid_by_name(unsigned ubi_devnum, const char *vol_name) FAST_FUNC; extern const char *applet_name; /* Some older linkers don't perform string merging, we used to have common strings * as global arrays to do it by hand. But: * (1) newer linkers do it themselves, * (2) however, they DONT merge string constants with global arrays, * even if the value is the same (!). Thus global arrays actually * increased size a bit: for example, "/etc/passwd" string from libc * wasn't merged with bb_path_passwd_file[] array! * Therefore now we use #defines. */ /* "BusyBox vN.N.N (timestamp or extra_version)" */ extern const char bb_banner[] ALIGN1; extern const char bb_msg_memory_exhausted[] ALIGN1; extern const char bb_msg_invalid_date[] ALIGN1; #define bb_msg_read_error "read error" #define bb_msg_write_error "write error" extern const char bb_msg_unknown[] ALIGN1; extern const char bb_msg_can_not_create_raw_socket[] ALIGN1; extern const char bb_msg_perm_denied_are_you_root[] ALIGN1; extern const char bb_msg_you_must_be_root[] ALIGN1; extern const char bb_msg_requires_arg[] ALIGN1; extern const char bb_msg_invalid_arg_to[] ALIGN1; extern const char bb_msg_standard_input[] ALIGN1; extern const char bb_msg_standard_output[] ALIGN1; /* NB: (bb_hexdigits_upcase[i] | 0x20) -> lowercase hex digit */ extern const char bb_hexdigits_upcase[] ALIGN1; extern const char bb_path_wtmp_file[] ALIGN1; /* Busybox mount uses either /proc/mounts or /etc/mtab to * get the list of currently mounted filesystems */ #define bb_path_mtab_file IF_FEATURE_MTAB_SUPPORT("/etc/mtab")IF_NOT_FEATURE_MTAB_SUPPORT("/proc/mounts") #define bb_path_passwd_file _PATH_PASSWD #define bb_path_group_file _PATH_GROUP #define bb_path_shadow_file _PATH_SHADOW #define bb_path_gshadow_file _PATH_GSHADOW #define bb_path_motd_file "/etc/motd" #define bb_dev_null "/dev/null" extern const char bb_busybox_exec_path[] ALIGN1; /* allow default system PATH to be extended via CFLAGS */ #ifndef BB_ADDITIONAL_PATH #define BB_ADDITIONAL_PATH "" #endif #define BB_PATH_ROOT_PATH "PATH=/sbin:/usr/sbin:/bin:/usr/bin" BB_ADDITIONAL_PATH extern const char bb_PATH_root_path[] ALIGN1; /* BB_PATH_ROOT_PATH */ #define bb_default_root_path (bb_PATH_root_path + sizeof("PATH")) /* util-linux manpage says /sbin:/bin:/usr/sbin:/usr/bin, * but I want to save a few bytes here: */ #define bb_default_path (bb_PATH_root_path + sizeof("PATH=/sbin:/usr/sbin")) extern const int const_int_0; //extern const int const_int_1; /* This struct is deliberately not defined. */ /* See docs/keep_data_small.txt */ struct globals; /* '*const' ptr makes gcc optimize code much better. * Magic prevents ptr_to_globals from going into rodata. * If you want to assign a value, use SET_PTR_TO_GLOBALS(x) */ extern struct globals *BB_GLOBAL_CONST ptr_to_globals; #define barrier() asm volatile ("":::"memory") #if defined(__clang_major__) && __clang_major__ >= 9 /* Clang/llvm drops assignment to "constant" storage. Silently. * Needs serious convincing to not eliminate the store. */ static ALWAYS_INLINE void* not_const_pp(const void *p) { void *pp; asm volatile ( "# forget that p points to const" : /*outputs*/ "=r" (pp) : /*inputs*/ "0" (p) ); return pp; } # define ASSIGN_CONST_PTR(pptr, v) do { \ *(void**)not_const_pp(pptr) = (void*)(v); \ barrier(); \ } while (0) /* XZALLOC_CONST_PTR() is an out-of-line function to prevent * clang from reading pointer before it is assigned. */ void XZALLOC_CONST_PTR(const void *pptr, size_t size) FAST_FUNC; #else # define ASSIGN_CONST_PTR(pptr, v) do { \ *(void**)(pptr) = (void*)(v); \ /* At least gcc 3.4.6 on mipsel needs optimization barrier */ \ barrier(); \ } while (0) # define XZALLOC_CONST_PTR(pptr, size) ASSIGN_CONST_PTR(pptr, xzalloc(size)) #endif #define SET_PTR_TO_GLOBALS(x) ASSIGN_CONST_PTR(&ptr_to_globals, x) #define FREE_PTR_TO_GLOBALS() do { \ if (ENABLE_FEATURE_CLEAN_UP) { \ free(ptr_to_globals); \ } \ } while (0) /* You can change LIBBB_DEFAULT_LOGIN_SHELL, but don't use it, * use bb_default_login_shell and following defines. * If you change LIBBB_DEFAULT_LOGIN_SHELL, * don't forget to change increment constant. */ #define LIBBB_DEFAULT_LOGIN_SHELL "-/bin/sh" extern const char bb_default_login_shell[] ALIGN1; /* "/bin/sh" */ #define DEFAULT_SHELL (bb_default_login_shell+1) /* "sh" */ #define DEFAULT_SHELL_SHORT_NAME (bb_default_login_shell+6) /* The following devices are the same on all systems. */ #define CURRENT_TTY "/dev/tty" #define DEV_CONSOLE "/dev/console" #if defined(__FreeBSD_kernel__) # define CURRENT_VC CURRENT_TTY # define VC_1 "/dev/ttyv0" # define VC_2 "/dev/ttyv1" # define VC_3 "/dev/ttyv2" # define VC_4 "/dev/ttyv3" # define VC_5 "/dev/ttyv4" # define VC_FORMAT "/dev/ttyv%d" #elif defined(__GNU__) # define CURRENT_VC CURRENT_TTY # define VC_1 "/dev/tty1" # define VC_2 "/dev/tty2" # define VC_3 "/dev/tty3" # define VC_4 "/dev/tty4" # define VC_5 "/dev/tty5" # define VC_FORMAT "/dev/tty%d" #elif ENABLE_FEATURE_DEVFS /*Linux, obsolete devfs names */ # define CURRENT_VC "/dev/vc/0" # define VC_1 "/dev/vc/1" # define VC_2 "/dev/vc/2" # define VC_3 "/dev/vc/3" # define VC_4 "/dev/vc/4" # define VC_5 "/dev/vc/5" # define VC_FORMAT "/dev/vc/%d" # define LOOP_FORMAT "/dev/loop/%u" # define LOOP_NAMESIZE (sizeof("/dev/loop/") + sizeof(int)*3 + 1) # define LOOP_NAME "/dev/loop/" # define FB_0 "/dev/fb/0" #else /*Linux, normal names */ # define CURRENT_VC "/dev/tty0" # define VC_1 "/dev/tty1" # define VC_2 "/dev/tty2" # define VC_3 "/dev/tty3" # define VC_4 "/dev/tty4" # define VC_5 "/dev/tty5" # define VC_FORMAT "/dev/tty%d" # define LOOP_FORMAT "/dev/loop%u" # define LOOP_NAMESIZE (sizeof("/dev/loop") + sizeof(int)*3 + 1) # define LOOP_NAME "/dev/loop" # define FB_0 "/dev/fb0" #endif // storage helpers for mk*fs utilities char BUG_wrong_field_size(void); #define STORE_LE(field, value) \ do { \ if (sizeof(field) == 4) \ field = SWAP_LE32((uint32_t)(value)); \ else if (sizeof(field) == 2) \ field = SWAP_LE16((uint16_t)(value)); \ else if (sizeof(field) == 1) \ field = (uint8_t)(value); \ else \ BUG_wrong_field_size(); \ } while (0) #define FETCH_LE32(field) \ (sizeof(field) == 4 ? SWAP_LE32(field) : BUG_wrong_field_size()) #define ARRAY_SIZE(x) ((unsigned)(sizeof(x) / sizeof((x)[0]))) #define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)])) /* We redefine ctype macros. Unicode-correct handling of char types * can't be done with such byte-oriented operations anyway, * we don't lose anything. */ #undef isalnum #undef isalpha #undef isascii #undef isblank #undef iscntrl #undef isdigit #undef isgraph #undef islower #undef isprint #undef ispunct #undef isspace #undef isupper #undef isxdigit #undef toupper #undef tolower /* We save ~500 bytes on isdigit alone. * BTW, x86 likes (unsigned char) cast more than (unsigned). */ /* These work the same for ASCII and Unicode, * assuming no one asks "is this a *Unicode* letter?" using isalpha(letter) */ #define isascii(a) ((unsigned char)(a) <= 0x7f) #define isdigit(a) ((unsigned char)((a) - '0') <= 9) #define isupper(a) ((unsigned char)((a) - 'A') <= ('Z' - 'A')) #define islower(a) ((unsigned char)((a) - 'a') <= ('z' - 'a')) #define isalpha(a) ((unsigned char)(((a)|0x20) - 'a') <= ('z' - 'a')) #define isblank(a) ({ unsigned char bb__isblank = (a); bb__isblank == ' ' || bb__isblank == '\t'; }) #define iscntrl(a) ({ unsigned char bb__iscntrl = (a); bb__iscntrl < ' ' || bb__iscntrl == 0x7f; }) /* In POSIX/C locale isspace is only these chars: "\t\n\v\f\r" and space. * "\t\n\v\f\r" happen to have ASCII codes 9,10,11,12,13. */ #define isspace(a) ({ unsigned char bb__isspace = (a) - 9; bb__isspace == (' ' - 9) || bb__isspace <= (13 - 9); }) // Unsafe wrt NUL: #define ispunct(a) (strchr("!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~", (a)) != NULL) #define ispunct(a) (strchrnul("!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~", (a))[0]) // Bigger code: #define isalnum(a) ({ unsigned char bb__isalnum = (a) - '0'; bb__isalnum <= 9 || ((bb__isalnum - ('A' - '0')) & 0xdf) <= 25; }) #define isalnum(a) bb_ascii_isalnum(a) static ALWAYS_INLINE int bb_ascii_isalnum(unsigned char a) { unsigned char b = a - '0'; if (b <= 9) return (b <= 9); b = (a|0x20) - 'a'; return b <= 'z' - 'a'; } #define isxdigit(a) bb_ascii_isxdigit(a) static ALWAYS_INLINE int bb_ascii_isxdigit(unsigned char a) { unsigned char b = a - '0'; if (b <= 9) return (b <= 9); b = (a|0x20) - 'a'; return b <= 'f' - 'a'; } #define toupper(a) bb_ascii_toupper(a) static ALWAYS_INLINE unsigned char bb_ascii_toupper(unsigned char a) { unsigned char b = a - 'a'; if (b <= ('z' - 'a')) a -= 'a' - 'A'; return a; } #define tolower(a) bb_ascii_tolower(a) static ALWAYS_INLINE unsigned char bb_ascii_tolower(unsigned char a) { unsigned char b = a - 'A'; if (b <= ('Z' - 'A')) a += 'a' - 'A'; return a; } /* In ASCII and Unicode, these are likely to be very different. * Let's prevent ambiguous usage from the start */ #define isgraph(a) isgraph_is_ambiguous_dont_use(a) #define isprint(a) isprint_is_ambiguous_dont_use(a) /* NB: must not treat EOF as isgraph or isprint */ #define isgraph_asciionly(a) ((unsigned)((a) - 0x21) <= 0x7e - 0x21) #define isprint_asciionly(a) ((unsigned)((a) - 0x20) <= 0x7e - 0x20) /* Simple unit-testing framework */ typedef void (*bbunit_testfunc)(void); struct bbunit_listelem { const char* name; bbunit_testfunc testfunc; }; void bbunit_registertest(struct bbunit_listelem* test); void bbunit_settestfailed(void); #define BBUNIT_DEFINE_TEST(NAME) \ static void bbunit_##NAME##_test(void); \ static struct bbunit_listelem bbunit_##NAME##_elem = { \ .name = #NAME, \ .testfunc = bbunit_##NAME##_test, \ }; \ static void INIT_FUNC bbunit_##NAME##_register(void) \ { \ bbunit_registertest(&bbunit_##NAME##_elem); \ } \ static void bbunit_##NAME##_test(void) /* * Both 'goto bbunit_end' and 'break' are here only to get rid * of compiler warnings. */ #define BBUNIT_ENDTEST \ do { \ goto bbunit_end; \ bbunit_end: \ break; \ } while (0) #define BBUNIT_PRINTASSERTFAIL \ do { \ bb_error_msg( \ "[ERROR] Assertion failed in file %s, line %d", \ __FILE__, __LINE__); \ } while (0) #define BBUNIT_ASSERTION_FAILED \ do { \ bbunit_settestfailed(); \ goto bbunit_end; \ } while (0) /* * Assertions. * For now we only offer assertions which cause tests to fail * immediately. In the future 'expects' might be added too - * similar to those offered by the gtest framework. */ #define BBUNIT_ASSERT_EQ(EXPECTED, ACTUAL) \ do { \ if ((EXPECTED) != (ACTUAL)) { \ BBUNIT_PRINTASSERTFAIL; \ bb_error_msg("[ERROR] '%s' isn't equal to '%s'", \ #EXPECTED, #ACTUAL); \ BBUNIT_ASSERTION_FAILED; \ } \ } while (0) #define BBUNIT_ASSERT_NOTEQ(EXPECTED, ACTUAL) \ do { \ if ((EXPECTED) == (ACTUAL)) { \ BBUNIT_PRINTASSERTFAIL; \ bb_error_msg("[ERROR] '%s' is equal to '%s'", \ #EXPECTED, #ACTUAL); \ BBUNIT_ASSERTION_FAILED; \ } \ } while (0) #define BBUNIT_ASSERT_NOTNULL(PTR) \ do { \ if ((PTR) == NULL) { \ BBUNIT_PRINTASSERTFAIL; \ bb_error_msg("[ERROR] '%s' is NULL!", #PTR); \ BBUNIT_ASSERTION_FAILED; \ } \ } while (0) #define BBUNIT_ASSERT_NULL(PTR) \ do { \ if ((PTR) != NULL) { \ BBUNIT_PRINTASSERTFAIL; \ bb_error_msg("[ERROR] '%s' is not NULL!", #PTR); \ BBUNIT_ASSERTION_FAILED; \ } \ } while (0) #define BBUNIT_ASSERT_FALSE(STATEMENT) \ do { \ if ((STATEMENT)) { \ BBUNIT_PRINTASSERTFAIL; \ bb_error_msg("[ERROR] Statement '%s' evaluated to true!", \ #STATEMENT); \ BBUNIT_ASSERTION_FAILED; \ } \ } while (0) #define BBUNIT_ASSERT_TRUE(STATEMENT) \ do { \ if (!(STATEMENT)) { \ BBUNIT_PRINTASSERTFAIL; \ bb_error_msg("[ERROR] Statement '%s' evaluated to false!", \ #STATEMENT); \ BBUNIT_ASSERTION_FAILED; \ } \ } while (0) #define BBUNIT_ASSERT_STREQ(STR1, STR2) \ do { \ if (strcmp(STR1, STR2) != 0) { \ BBUNIT_PRINTASSERTFAIL; \ bb_error_msg("[ERROR] Strings '%s' and '%s' " \ "are not the same", STR1, STR2); \ BBUNIT_ASSERTION_FAILED; \ } \ } while (0) #define BBUNIT_ASSERT_STRNOTEQ(STR1, STR2) \ do { \ if (strcmp(STR1, STR2) == 0) { \ BBUNIT_PRINTASSERTFAIL; \ bb_error_msg("[ERROR] Strings '%s' and '%s' " \ "are the same, but were " \ "expected to differ", STR1, STR2); \ BBUNIT_ASSERTION_FAILED; \ } \ } while (0) POP_SAVED_FUNCTION_VISIBILITY #endif