/* vi: set sw=4 ts=4: */ /* * Mini xargs implementation for busybox * * (C) 2002,2003 by Vladimir Oleynik * * Special thanks * - Mark Whitley and Glenn McGrath for stimulus to rewrite :) * - Mike Rendell * and David MacKenzie . * * Licensed under GPLv2 or later, see file LICENSE in this source tree. * * xargs is described in the Single Unix Specification v3 at * http://www.opengroup.org/onlinepubs/007904975/utilities/xargs.html */ //config:config XARGS //config: bool "xargs (7.2 kb)" //config: default y //config: help //config: xargs is used to execute a specified command for //config: every item from standard input. //config: //config:config FEATURE_XARGS_SUPPORT_CONFIRMATION //config: bool "Enable -p: prompt and confirmation" //config: default y //config: depends on XARGS //config: help //config: Support -p: prompt the user whether to run each command //config: line and read a line from the terminal. //config: //config:config FEATURE_XARGS_SUPPORT_QUOTES //config: bool "Enable single and double quotes and backslash" //config: default y //config: depends on XARGS //config: help //config: Support quoting in the input. //config: //config:config FEATURE_XARGS_SUPPORT_TERMOPT //config: bool "Enable -x: exit if -s or -n is exceeded" //config: default y //config: depends on XARGS //config: help //config: Support -x: exit if the command size (see the -s or -n option) //config: is exceeded. //config: //config:config FEATURE_XARGS_SUPPORT_ZERO_TERM //config: bool "Enable -0: NUL-terminated input" //config: default y //config: depends on XARGS //config: help //config: Support -0: input items are terminated by a NUL character //config: instead of whitespace, and the quotes and backslash //config: are not special. //config: //config:config FEATURE_XARGS_SUPPORT_REPL_STR //config: bool "Enable -I STR: string to replace" //config: default y //config: depends on XARGS //config: help //config: Support -I STR and -i[STR] options. //config: //config:config FEATURE_XARGS_SUPPORT_PARALLEL //config: bool "Enable -P N: processes to run in parallel" //config: default y //config: depends on XARGS //config: //config:config FEATURE_XARGS_SUPPORT_ARGS_FILE //config: bool "Enable -a FILE: use FILE instead of stdin" //config: default y //config: depends on XARGS //applet:IF_XARGS(APPLET_NOEXEC(xargs, xargs, BB_DIR_USR_BIN, BB_SUID_DROP, xargs)) //kbuild:lib-$(CONFIG_XARGS) += xargs.o #include "libbb.h" #include "common_bufsiz.h" /* This is a NOEXEC applet. Be very careful! */ #if 0 # define dbg_msg(...) bb_error_msg(__VA_ARGS__) #else # define dbg_msg(...) ((void)0) #endif #ifdef TEST # ifndef ENABLE_FEATURE_XARGS_SUPPORT_CONFIRMATION # define ENABLE_FEATURE_XARGS_SUPPORT_CONFIRMATION 1 # endif # ifndef ENABLE_FEATURE_XARGS_SUPPORT_QUOTES # define ENABLE_FEATURE_XARGS_SUPPORT_QUOTES 1 # endif # ifndef ENABLE_FEATURE_XARGS_SUPPORT_TERMOPT # define ENABLE_FEATURE_XARGS_SUPPORT_TERMOPT 1 # endif # ifndef ENABLE_FEATURE_XARGS_SUPPORT_ZERO_TERM # define ENABLE_FEATURE_XARGS_SUPPORT_ZERO_TERM 1 # endif #endif struct globals { char **args; #if ENABLE_FEATURE_XARGS_SUPPORT_REPL_STR char **argv; const char *repl_str; char eol_ch; #endif const char *eof_str; int idx; int fd_tty; int fd_stdin; #if ENABLE_FEATURE_XARGS_SUPPORT_PARALLEL int running_procs; int max_procs; #endif smalluint xargs_exitcode; #if ENABLE_FEATURE_XARGS_SUPPORT_QUOTES #define NORM 0 #define QUOTE 1 #define BACKSLASH 2 #define SPACE 4 smalluint process_stdin__state; char process_stdin__q; #endif } FIX_ALIASING; #define G (*(struct globals*)bb_common_bufsiz1) #define INIT_G() do { \ setup_common_bufsiz(); \ IF_FEATURE_XARGS_SUPPORT_REPL_STR(G.repl_str = "{}";) \ IF_FEATURE_XARGS_SUPPORT_REPL_STR(G.eol_ch = '\n';) \ /* Even zero values are set because we are NOEXEC applet */ \ G.eof_str = NULL; \ G.idx = 0; \ IF_FEATURE_XARGS_SUPPORT_PARALLEL(G.running_procs = 0;) \ IF_FEATURE_XARGS_SUPPORT_PARALLEL(G.max_procs = 1;) \ G.xargs_exitcode = 0; \ IF_FEATURE_XARGS_SUPPORT_QUOTES(G.process_stdin__state = NORM;) \ IF_FEATURE_XARGS_SUPPORT_QUOTES(G.process_stdin__q = '\0';) \ } while (0) /* Correct regardless of combination of CONFIG_xxx */ enum { OPTBIT_VERBOSE = 0, OPTBIT_NO_EMPTY, OPTBIT_UPTO_NUMBER, OPTBIT_UPTO_SIZE, OPTBIT_EOF_STRING, OPTBIT_EOF_STRING1, OPTBIT_STDIN_TTY, IF_FEATURE_XARGS_SUPPORT_CONFIRMATION(OPTBIT_INTERACTIVE,) IF_FEATURE_XARGS_SUPPORT_TERMOPT( OPTBIT_TERMINATE ,) IF_FEATURE_XARGS_SUPPORT_ZERO_TERM( OPTBIT_ZEROTERM ,) IF_FEATURE_XARGS_SUPPORT_REPL_STR( OPTBIT_REPLSTR ,) IF_FEATURE_XARGS_SUPPORT_REPL_STR( OPTBIT_REPLSTR1 ,) OPT_VERBOSE = 1 << OPTBIT_VERBOSE , OPT_NO_EMPTY = 1 << OPTBIT_NO_EMPTY , OPT_UPTO_NUMBER = 1 << OPTBIT_UPTO_NUMBER, OPT_UPTO_SIZE = 1 << OPTBIT_UPTO_SIZE , OPT_EOF_STRING = 1 << OPTBIT_EOF_STRING , /* GNU: -e[] */ OPT_EOF_STRING1 = 1 << OPTBIT_EOF_STRING1, /* SUS: -E */ OPT_STDIN_TTY = 1 << OPTBIT_STDIN_TTY, OPT_INTERACTIVE = IF_FEATURE_XARGS_SUPPORT_CONFIRMATION((1 << OPTBIT_INTERACTIVE)) + 0, OPT_TERMINATE = IF_FEATURE_XARGS_SUPPORT_TERMOPT( (1 << OPTBIT_TERMINATE )) + 0, OPT_ZEROTERM = IF_FEATURE_XARGS_SUPPORT_ZERO_TERM( (1 << OPTBIT_ZEROTERM )) + 0, OPT_REPLSTR = IF_FEATURE_XARGS_SUPPORT_REPL_STR( (1 << OPTBIT_REPLSTR )) + 0, OPT_REPLSTR1 = IF_FEATURE_XARGS_SUPPORT_REPL_STR( (1 << OPTBIT_REPLSTR1 )) + 0, }; #define OPTION_STR "+trn:s:e::E:o" \ IF_FEATURE_XARGS_SUPPORT_CONFIRMATION("p") \ IF_FEATURE_XARGS_SUPPORT_TERMOPT( "x") \ IF_FEATURE_XARGS_SUPPORT_ZERO_TERM( "0") \ IF_FEATURE_XARGS_SUPPORT_REPL_STR( "I:i::") \ IF_FEATURE_XARGS_SUPPORT_PARALLEL( "P:+") \ IF_FEATURE_XARGS_SUPPORT_ARGS_FILE( "a:") /* * Returns 0 if xargs should continue (but may set G.xargs_exitcode to 123). * Else sets G.xargs_exitcode to error code and returns nonzero. * * If G.max_procs == 0, performs final waitpid() loop for all children. */ static int xargs_exec(void) { int status; if (option_mask32 & OPT_STDIN_TTY) xdup2(G.fd_tty, STDIN_FILENO); #if !ENABLE_FEATURE_XARGS_SUPPORT_PARALLEL status = spawn_and_wait(G.args); #else if (G.max_procs == 1) { status = spawn_and_wait(G.args); } else { pid_t pid; int wstat; again: if (G.running_procs >= G.max_procs) pid = safe_waitpid(-1, &wstat, 0); else pid = wait_any_nohang(&wstat); if (pid > 0) { /* We may have children we don't know about: * sh -c 'sleep 1 & exec xargs ...' * Do not make G.running_procs go negative. */ if (G.running_procs != 0) G.running_procs--; status = WIFSIGNALED(wstat) ? 0x180 + WTERMSIG(wstat) : WEXITSTATUS(wstat); if (status > 0 && status < 255) { /* See below why 123 does not abort */ G.xargs_exitcode = 123; status = 0; } if (status == 0) goto again; /* maybe we have more children? */ /* else: "bad" status, will bail out */ } else if (G.max_procs != 0) { /* Not in final waitpid() loop, * and G.running_procs < G.max_procs: start more procs */ status = spawn(G.args); /* here "status" actually holds pid, or -1 */ if (status > 0) { G.running_procs++; status = 0; } /* else: status == -1 (failed to fork or exec) */ } else { /* final waitpid() loop: must be ECHILD "no more children" */ status = 0; } } #endif /* Manpage: * """xargs exits with the following status: * 0 if it succeeds * 123 if any invocation of the command exited with status 1-125 * 124 if the command exited with status 255 * ("""If any invocation of the command exits with a status of 255, * xargs will stop immediately without reading any further input. * An error message is issued on stderr when this happens.""") * 125 if the command is killed by a signal * 126 if the command cannot be run * 127 if the command is not found * 1 if some other error occurred.""" */ if (status < 0) { bb_simple_perror_msg(G.args[0]); status = (errno == ENOENT) ? 127 : 126; } else if (status >= 0x180) { bb_error_msg("'%s' terminated by signal %u", G.args[0], status - 0x180); status = 125; } else if (status != 0) { if (status == 255) { bb_error_msg("%s: exited with status 255; aborting", G.args[0]); status = 124; goto ret; } /* "123 if any invocation of the command exited with status 1-125" * This implies that nonzero exit code is remembered, * but does not cause xargs to stop: we return 0. */ G.xargs_exitcode = 123; status = 0; } ret: if (status != 0) G.xargs_exitcode = status; if (option_mask32 & OPT_STDIN_TTY) xdup2(G.fd_stdin, STDIN_FILENO); return status; } /* 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 xargs__isspace = (a) - 9; xargs__isspace == (' ' - 9) || xargs__isspace <= (13 - 9); }) static void store_param(char *s) { /* Grow by 256 elements at once */ if (!(G.idx & 0xff)) { /* G.idx == N*256? */ /* Enlarge, make G.args[(N+1)*256 - 1] last valid idx */ G.args = xrealloc(G.args, sizeof(G.args[0]) * (G.idx + 0x100)); } G.args[G.idx++] = s; } /* process[0]_stdin: * Read characters into buf[n_max_chars+1], and when parameter delimiter * is seen, store the address of a new parameter to args[]. * If reading discovers that last chars do not form the complete * parameter, the pointer to the first such "tail character" is returned. * (buf has extra byte at the end to accommodate terminating NUL * of "tail characters" string). * Otherwise, the returned pointer points to NUL byte. * On entry, buf[] may contain some "seed chars" which are to become * the beginning of the first parameter. */ #if ENABLE_FEATURE_XARGS_SUPPORT_QUOTES static char* FAST_FUNC process_stdin(int n_max_chars, int n_max_arg, char *buf) { #define q G.process_stdin__q #define state G.process_stdin__state char *s = buf; /* start of the word */ char *p = s + strlen(buf); /* end of the word */ buf += n_max_chars; /* past buffer's end */ /* "goto ret" is used instead of "break" to make control flow * more obvious: */ while (1) { int c = getchar(); if (c == EOF) { if (p != s) goto close_word; goto ret; } if (state == BACKSLASH) { state = NORM; goto set; } if (state == QUOTE) { if (c != q) goto set; q = '\0'; state = NORM; } else { /* if (state == NORM) */ if (ISSPACE(c)) { if (p != s) { close_word: state = SPACE; c = '\0'; goto set; } } else { if (c == '\\') { state = BACKSLASH; } else if (c == '\'' || c == '"') { q = c; state = QUOTE; } else { set: *p++ = c; } } } if (state == SPACE) { /* word's delimiter or EOF detected */ state = NORM; if (q) { bb_error_msg_and_die("unmatched %s quote", q == '\'' ? "single" : "double"); } /* A full word is loaded */ if (G.eof_str) { if (strcmp(s, G.eof_str) == 0) { while (getchar() != EOF) continue; p = s; goto ret; } } store_param(s); dbg_msg("args[]:'%s'", s); s = p; n_max_arg--; if (n_max_arg == 0) { goto ret; } } if (p == buf) { goto ret; } } ret: *p = '\0'; /* store_param(NULL) - caller will do it */ dbg_msg("return:'%s'", s); return s; #undef q #undef state } #else /* The variant does not support single quotes, double quotes or backslash */ static char* FAST_FUNC process_stdin(int n_max_chars, int n_max_arg, char *buf) { char *s = buf; /* start of the word */ char *p = s + strlen(buf); /* end of the word */ buf += n_max_chars; /* past buffer's end */ while (1) { int c = getchar(); if (c == EOF) { if (p == s) goto ret; } if (c == EOF || ISSPACE(c)) { if (p == s) continue; c = EOF; } *p++ = (c == EOF ? '\0' : c); if (c == EOF) { /* word's delimiter or EOF detected */ /* A full word is loaded */ if (G.eof_str) { if (strcmp(s, G.eof_str) == 0) { while (getchar() != EOF) continue; p = s; goto ret; } } store_param(s); dbg_msg("args[]:'%s'", s); s = p; n_max_arg--; if (n_max_arg == 0) { goto ret; } } if (p == buf) { goto ret; } } ret: *p = '\0'; /* store_param(NULL) - caller will do it */ dbg_msg("return:'%s'", s); return s; } #endif /* FEATURE_XARGS_SUPPORT_QUOTES */ #if ENABLE_FEATURE_XARGS_SUPPORT_ZERO_TERM static char* FAST_FUNC process0_stdin(int n_max_chars, int n_max_arg, char *buf) { char *s = buf; /* start of the word */ char *p = s + strlen(buf); /* end of the word */ buf += n_max_chars; /* past buffer's end */ while (1) { int c = getchar(); if (c == EOF) { if (p == s) goto ret; c = '\0'; } *p++ = c; if (c == '\0') { /* NUL or EOF detected */ /* A full word is loaded */ store_param(s); dbg_msg("args[]:'%s'", s); s = p; n_max_arg--; if (n_max_arg == 0) { goto ret; } } if (p == buf) { goto ret; } } ret: *p = '\0'; /* store_param(NULL) - caller will do it */ dbg_msg("return:'%s'", s); return s; } #endif /* FEATURE_XARGS_SUPPORT_ZERO_TERM */ #if ENABLE_FEATURE_XARGS_SUPPORT_REPL_STR /* * Used if -I was specified. * In this mode, words aren't appended to PROG ARGS. * Instead, entire input line is read, then string * in every PROG and ARG is replaced with the line: * echo -e "ho ho\nhi" | xargs -I_ cmd __ _ * results in "cmd 'ho hoho ho' 'ho ho'"; "cmd 'hihi' 'hi'". * -n MAX_ARGS seems to be ignored. * Tested with GNU findutils 4.5.10. */ //FIXME: n_max_chars is not handled the same way as in GNU findutils. //FIXME: quoting is not implemented. static char* FAST_FUNC process_stdin_with_replace(int n_max_chars, int n_max_arg UNUSED_PARAM, char *buf) { int i; char *end, *p; /* Free strings from last invocation, if any */ for (i = 0; G.args && G.args[i]; i++) if (G.args[i] != G.argv[i]) free(G.args[i]); end = buf + n_max_chars; p = buf; while (1) { int c = getchar(); if (p == buf) { if (c == EOF) goto ret; /* last line is empty, return "" */ if (c == G.eol_ch) continue; /* empty line, ignore */ /* Skip leading whitespace of each line: try * echo -e ' \t\v1 2 3 ' | xargs -I% echo '[%]' */ if (ISSPACE(c)) continue; } if (c == EOF || c == G.eol_ch) { c = '\0'; } *p++ = c; if (c == '\0') { /* EOL or EOF detected */ i = 0; while (G.argv[i]) { char *arg = G.argv[i]; int count = count_strstr(arg, G.repl_str); if (count != 0) arg = xmalloc_substitute_string(arg, count, G.repl_str, buf); store_param(arg); dbg_msg("args[]:'%s'", arg); i++; } p = buf; goto ret; } if (p == end) { goto ret; } } ret: *p = '\0'; /* store_param(NULL) - caller will do it */ dbg_msg("return:'%s'", buf); return buf; } #endif #if ENABLE_FEATURE_XARGS_SUPPORT_CONFIRMATION /* Prompt the user for a response, and * if user responds affirmatively, return true; * otherwise, return false. Uses "/dev/tty", not stdin. */ static int xargs_ask_confirmation(void) { FILE *tty_stream; int r; tty_stream = xfopen_for_read(CURRENT_TTY); fputs(" ?...", stderr); r = bb_ask_y_confirmation_FILE(tty_stream); fclose(tty_stream); return r; } #else # define xargs_ask_confirmation() 1 #endif //usage:#define xargs_trivial_usage //usage: "[OPTIONS] [PROG ARGS]" //usage:#define xargs_full_usage "\n\n" //usage: "Run PROG on every item given by stdin\n" //usage: IF_FEATURE_XARGS_SUPPORT_ZERO_TERM( //usage: "\n -0 NUL terminated input" //usage: ) //usage: IF_FEATURE_XARGS_SUPPORT_ARGS_FILE( //usage: "\n -a FILE Read from FILE instead of stdin" //usage: ) //usage: "\n -o Reopen stdin as /dev/tty" //usage: "\n -r Don't run command if input is empty" //usage: "\n -t Print the command on stderr before execution" //usage: IF_FEATURE_XARGS_SUPPORT_CONFIRMATION( //usage: "\n -p Ask user whether to run each command" //usage: ) //usage: "\n -E STR,-e[STR] STR stops input processing" //usage: IF_FEATURE_XARGS_SUPPORT_REPL_STR( //usage: "\n -I STR Replace STR within PROG ARGS with input line" //usage: ) //usage: "\n -n N Pass no more than N args to PROG" //usage: "\n -s N Pass command line of no more than N bytes" //usage: IF_FEATURE_XARGS_SUPPORT_PARALLEL( //usage: "\n -P N Run up to N PROGs in parallel" //usage: ) //usage: IF_FEATURE_XARGS_SUPPORT_TERMOPT( //usage: "\n -x Exit if size is exceeded" //usage: ) //usage:#define xargs_example_usage //usage: "$ ls | xargs gzip\n" //usage: "$ find . -name '*.c' -print | xargs rm\n" int xargs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int xargs_main(int argc UNUSED_PARAM, char **argv) { int initial_idx; int i; char *max_args; char *max_chars; char *buf; unsigned opt; int n_max_chars; int n_max_arg; #if ENABLE_FEATURE_XARGS_SUPPORT_ZERO_TERM \ || ENABLE_FEATURE_XARGS_SUPPORT_REPL_STR char* FAST_FUNC (*read_args)(int, int, char*) = process_stdin; #else #define read_args process_stdin #endif IF_FEATURE_XARGS_SUPPORT_ARGS_FILE(char *opt_a = NULL;) INIT_G(); opt = getopt32long(argv, OPTION_STR, "no-run-if-empty\0" No_argument "r", &max_args, &max_chars, &G.eof_str, &G.eof_str IF_FEATURE_XARGS_SUPPORT_REPL_STR(, &G.repl_str, &G.repl_str) IF_FEATURE_XARGS_SUPPORT_PARALLEL(, &G.max_procs) IF_FEATURE_XARGS_SUPPORT_ARGS_FILE(, &opt_a) ); #if ENABLE_FEATURE_XARGS_SUPPORT_PARALLEL if (G.max_procs <= 0) /* -P0 means "run lots of them" */ G.max_procs = 100; /* let's not go crazy high */ #endif #if ENABLE_FEATURE_XARGS_SUPPORT_ARGS_FILE if (opt_a) xmove_fd(xopen(opt_a, O_RDONLY), 0); #endif /* -E ""? You may wonder why not just omit -E? * This is used for portability: * old xargs was using "_" as default for -E / -e */ if ((opt & OPT_EOF_STRING1) && G.eof_str[0] == '\0') G.eof_str = NULL; if (opt & OPT_ZEROTERM) { IF_FEATURE_XARGS_SUPPORT_ZERO_TERM(read_args = process0_stdin;) IF_FEATURE_XARGS_SUPPORT_REPL_STR(G.eol_ch = '\0';) } argv += optind; //argc -= optind; if (!argv[0]) { /* default behavior is to echo all the filenames */ *--argv = (char*)"echo"; //argc++; } /* * The Open Group Base Specifications Issue 6: * "The xargs utility shall limit the command line length such that * when the command line is invoked, the combined argument * and environment lists (see the exec family of functions * in the System Interfaces volume of IEEE Std 1003.1-2001) * shall not exceed {ARG_MAX}-2048 bytes". */ n_max_chars = bb_arg_max(); if (n_max_chars > 32 * 1024) n_max_chars = 32 * 1024; /* * POSIX suggests substracting 2048 bytes from sysconf(_SC_ARG_MAX) * so that the process may safely modify its environment. */ n_max_chars -= 2048; if (opt & OPT_UPTO_SIZE) { n_max_chars = xatou_range(max_chars, 1, INT_MAX); } /* Account for prepended fixed arguments */ { size_t n_chars = 0; for (i = 0; argv[i]; i++) { n_chars += strlen(argv[i]) + 1; } n_max_chars -= n_chars; } /* Sanity check */ if (n_max_chars <= 0) { bb_simple_error_msg_and_die("can't fit single argument within argument list size limit"); } buf = xzalloc(n_max_chars + 1); n_max_arg = n_max_chars; if (opt & OPT_UPTO_NUMBER) { n_max_arg = xatou_range(max_args, 1, INT_MAX); /* Not necessary, we use growable args[]: */ /* if (n_max_arg > n_max_chars) n_max_arg = n_max_chars */ } #if ENABLE_FEATURE_XARGS_SUPPORT_REPL_STR if (opt & (OPT_REPLSTR | OPT_REPLSTR1)) { /* * -I: * Unmodified args are kept in G.argv[i], * G.args[i] receives malloced G.argv[i] with replaced * with input line. Setting this up: */ G.args = NULL; G.argv = argv; read_args = process_stdin_with_replace; /* Make -I imply -r. GNU findutils seems to do the same: */ /* (otherwise "echo -n | xargs -I% echo %" would SEGV) */ opt |= OPT_NO_EMPTY; } else #endif { /* Store the command to be executed, part 1. * We can statically allocate (argc + n_max_arg + 1) elements * and do not bother with resizing args[], but on 64-bit machines * this results in args[] vector which is ~8 times bigger * than n_max_chars! That is, with n_max_chars == 20k, * args[] will take 160k (!), which will most likely be * almost entirely unused. */ for (i = 0; argv[i]; i++) store_param(argv[i]); } if (opt & OPT_STDIN_TTY) { G.fd_tty = xopen(CURRENT_TTY, O_RDONLY); close_on_exec_on(G.fd_tty); G.fd_stdin = dup(STDIN_FILENO); close_on_exec_on(G.fd_stdin); } initial_idx = G.idx; while (1) { char *rem; G.idx = initial_idx; rem = read_args(n_max_chars, n_max_arg, buf); store_param(NULL); if (!G.args[initial_idx]) { /* not even one ARG was added? */ if (*rem != '\0') bb_simple_error_msg_and_die("argument line too long"); if (opt & OPT_NO_EMPTY) break; } opt |= OPT_NO_EMPTY; if (opt & (OPT_INTERACTIVE | OPT_VERBOSE)) { const char *fmt = " %s" + 1; char **args = G.args; for (i = 0; args[i]; i++) { fprintf(stderr, fmt, args[i]); fmt = " %s"; } if (!(opt & OPT_INTERACTIVE)) bb_putchar_stderr('\n'); } if (!(opt & OPT_INTERACTIVE) || xargs_ask_confirmation()) { if (xargs_exec() != 0) break; /* G.xargs_exitcode is set by xargs_exec() */ } overlapping_strcpy(buf, rem); } /* while */ if (ENABLE_FEATURE_CLEAN_UP) { free(G.args); free(buf); } #if ENABLE_FEATURE_XARGS_SUPPORT_PARALLEL G.max_procs = 0; xargs_exec(); /* final waitpid() loop */ #endif return G.xargs_exitcode; } #ifdef TEST const char *applet_name = "debug stuff usage"; void bb_show_usage(void) { fprintf(stderr, "Usage: %s [-p] [-r] [-t] -[x] [-n max_arg] [-s max_chars]\n", applet_name); exit_FAILURE(); } int main(int argc, char **argv) { return xargs_main(argc, argv); } #endif /* TEST */