diff options
| -rw-r--r-- | coreutils/dd.c | 9 | ||||
| -rw-r--r-- | e2fsprogs/fsck.c | 7 | ||||
| -rw-r--r-- | include/libbb.h | 7 | ||||
| -rw-r--r-- | libbb/bb_askpass.c | 4 | ||||
| -rw-r--r-- | libbb/signals.c | 28 | ||||
| -rw-r--r-- | loginutils/vlock.c | 15 | ||||
| -rw-r--r-- | miscutils/devfsd.c | 4 | ||||
| -rw-r--r-- | miscutils/rx.c | 5 | ||||
| -rw-r--r-- | networking/arping.c | 14 | ||||
| -rw-r--r-- | networking/httpd.c | 15 | ||||
| -rw-r--r-- | networking/inetd.c | 12 | ||||
| -rw-r--r-- | networking/wget.c | 9 | ||||
| -rw-r--r-- | shell/ash.c | 2 | ||||
| -rw-r--r-- | shell/hush.c | 12 |
14 files changed, 60 insertions, 83 deletions
diff --git a/coreutils/dd.c b/coreutils/dd.c index 961b1ff..f3330e6 100644 --- a/coreutils/dd.c +++ b/coreutils/dd.c @@ -121,9 +121,6 @@ int dd_main(int argc, char **argv) off_t count; off_t seek, skip; const char *infile, *outfile; -#if ENABLE_FEATURE_DD_SIGNAL_HANDLING - struct sigaction sigact; -#endif } Z; #define flags (Z.flags ) #define oc (Z.oc ) @@ -132,17 +129,13 @@ int dd_main(int argc, char **argv) #define skip (Z.skip ) #define infile (Z.infile ) #define outfile (Z.outfile) -#define sigact (Z.sigact ) memset(&Z, 0, sizeof(Z)); INIT_G(); //fflush(NULL); - is this needed because of NOEXEC? #if ENABLE_FEATURE_DD_SIGNAL_HANDLING - sigact.sa_handler = dd_output_status; - sigact.sa_flags = SA_RESTART; - /*sigemptyset(&sigact.sa_mask); - memset did it */ - sigaction(SIGUSR1, &sigact, NULL); + signal_SA_RESTART_empty_mask(SIGUSR1, dd_output_status); #endif for (n = 1; n < argc; n++) { diff --git a/e2fsprogs/fsck.c b/e2fsprogs/fsck.c index de2d61e..037a563 100644 --- a/e2fsprogs/fsck.c +++ b/e2fsprogs/fsck.c @@ -1164,12 +1164,9 @@ int fsck_main(int argc, char **argv) int interactive; const char *fstab; struct fs_info *fs; - struct sigaction sa; - memset(&sa, 0, sizeof(sa)); - sa.sa_handler = signal_cancel; - sigaction(SIGINT, &sa, NULL); - sigaction(SIGTERM, &sa, NULL); + signal_no_SA_RESTART_empty_mask(SIGINT, signal_cancel); + signal_no_SA_RESTART_empty_mask(SIGTERM, signal_cancel); setbuf(stdout, NULL); diff --git a/include/libbb.h b/include/libbb.h index 3c53e5e..505396b 100644 --- a/include/libbb.h +++ b/include/libbb.h @@ -275,6 +275,7 @@ char *xrealloc_getcwd_or_warn(char *cwd); char *xmalloc_follow_symlinks(const char *path); + enum { /* bb_signals(BB_SIGS_FATAL, handler) catches all signals which * otherwise would kill us, except for those resulting from bugs: @@ -306,6 +307,12 @@ void bb_signals(int sigs, void (*f)(int)); * and in a way that while signal handler is run, no other signals * will be blocked: */ void bb_signals_recursive(int sigs, void (*f)(int)); +/* syscalls like read() will be interrupted with EINTR: */ +void signal_no_SA_RESTART_empty_mask(int sig, void (*handler)(int)); +/* syscalls like read() won't be interrupted (though select/poll will be): */ +void signal_SA_RESTART_empty_mask(int sig, void (*handler)(int)); +/* Will do sigaction(signum, act, NULL): */ +int sigaction_set(int signum, const struct sigaction *act); void sig_block(int); void sig_unblock(int); /* UNUSED: void sig_blocknone(void); */ diff --git a/libbb/bb_askpass.c b/libbb/bb_askpass.c index fd12f92..3ad0e97 100644 --- a/libbb/bb_askpass.c +++ b/libbb/bb_askpass.c @@ -45,7 +45,7 @@ char *bb_askpass(int timeout, const char *prompt) sa.sa_handler = askpass_timeout; sigaction(SIGINT, &sa, &oldsa); if (timeout) { - sigaction(SIGALRM, &sa, NULL); + sigaction_set(SIGALRM, &sa); alarm(timeout); } @@ -68,7 +68,7 @@ char *bb_askpass(int timeout, const char *prompt) if (timeout) { alarm(0); } - sigaction(SIGINT, &oldsa, NULL); + sigaction_set(SIGINT, &oldsa); tcsetattr(STDIN_FILENO, TCSANOW, &oldtio); bb_putchar('\n'); diff --git a/libbb/signals.c b/libbb/signals.c index a327e87..719beab 100644 --- a/libbb/signals.c +++ b/libbb/signals.c @@ -11,6 +11,12 @@ #include "libbb.h" +/* Saves 2 bytes on x86! Oh my... */ +int sigaction_set(int signum, const struct sigaction *act) +{ + return sigaction(signum, act, NULL); +} + void bb_signals(int sigs, void (*f)(int)) { int sig_no = 0; @@ -40,7 +46,7 @@ void bb_signals_recursive(int sigs, void (*f)(int)) while (sigs) { if (sigs & bit) { sigs &= ~bit; - sigaction(sig_no, &sa, NULL); + sigaction_set(sig_no, &sa); } sig_no++; bit <<= 1; @@ -87,3 +93,23 @@ void kill_myself_with_sig(int sig) raise(sig); _exit(1); /* Should not reach it */ } + +void signal_SA_RESTART_empty_mask(int sig, void (*handler)(int)) +{ + struct sigaction sa; + memset(&sa, 0, sizeof(sa)); + /*sigemptyset(&sa.sa_mask);*/ + sa.sa_flags = SA_RESTART; + sa.sa_handler = handler; + sigaction_set(sig, &sa); +} + +void signal_no_SA_RESTART_empty_mask(int sig, void (*handler)(int)) +{ + struct sigaction sa; + memset(&sa, 0, sizeof(sa)); + /*sigemptyset(&sa.sa_mask);*/ + /*sa.sa_flags = 0;*/ + sa.sa_handler = handler; + sigaction_set(sig, &sa); +} diff --git a/loginutils/vlock.c b/loginutils/vlock.c index 846733e..ff60d78 100644 --- a/loginutils/vlock.c +++ b/loginutils/vlock.c @@ -34,7 +34,6 @@ static void acquire_vt(int signo) int vlock_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int vlock_main(int argc, char **argv) { - struct sigaction sa; struct vt_mode vtm; struct termios term; struct termios oterm; @@ -63,17 +62,11 @@ int vlock_main(int argc, char **argv) /* We will use SIGUSRx for console switch control: */ /* 1: set handlers */ - sigemptyset(&sa.sa_mask); - sa.sa_flags = SA_RESTART; - sa.sa_handler = release_vt; - sigaction(SIGUSR1, &sa, NULL); - sa.sa_handler = acquire_vt; - sigaction(SIGUSR2, &sa, NULL); + signal_SA_RESTART_empty_mask(SIGUSR1, release_vt); + signal_SA_RESTART_empty_mask(SIGUSR2, acquire_vt); /* 2: unmask them */ - sigprocmask(SIG_SETMASK, NULL, &sa.sa_mask); - sigdelset(&sa.sa_mask, SIGUSR1); - sigdelset(&sa.sa_mask, SIGUSR2); - sigprocmask(SIG_SETMASK, &sa.sa_mask, NULL); + sig_unblock(SIGUSR1); + sig_unblock(SIGUSR2); /* Revert stdin/out to our controlling tty * (or die if we have none) */ diff --git a/miscutils/devfsd.c b/miscutils/devfsd.c index 50c8203..1b88f05 100644 --- a/miscutils/devfsd.c +++ b/miscutils/devfsd.c @@ -390,8 +390,8 @@ int devfsd_main(int argc, char **argv) sigemptyset(&new_action.sa_mask); new_action.sa_flags = 0; new_action.sa_handler = signal_handler; - sigaction(SIGHUP, &new_action, NULL); - sigaction(SIGUSR1, &new_action, NULL); + sigaction_set(SIGHUP, &new_action); + sigaction_set(SIGUSR1, &new_action); printf("%s v%s started for %s\n", applet_name, DEVFSD_VERSION, mount_point); diff --git a/miscutils/rx.c b/miscutils/rx.c index 9a8fcaa..48867b8 100644 --- a/miscutils/rx.c +++ b/miscutils/rx.c @@ -220,7 +220,6 @@ static void sigalrm_handler(int ATTRIBUTE_UNUSED signum) int rx_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int rx_main(int argc, char **argv) { - struct sigaction act; struct termios tty, orig_tty; int termios_err; int file_fd; @@ -243,9 +242,7 @@ int rx_main(int argc, char **argv) } /* No SA_RESTART: we want ALRM to interrupt read() */ - memset(&act, 0, sizeof(act)); - act.sa_handler = sigalrm_handler; - sigaction(SIGALRM, &act, NULL); + signal_no_SA_RESTART_empty_mask(SIGALRM, sigalrm_handler); n = receive(file_fd); diff --git a/networking/arping.c b/networking/arping.c index c89b975..2277ec5 100644 --- a/networking/arping.c +++ b/networking/arping.c @@ -377,18 +377,8 @@ int arping_main(int argc, char **argv) printf(" from %s via %s\n", inet_ntoa(src), device); } - { - struct sigaction sa; - - memset(&sa, 0, sizeof(sa)); - sa.sa_flags = SA_RESTART; - - sa.sa_handler = (void (*)(int)) finish; - sigaction(SIGINT, &sa, NULL); - - sa.sa_handler = (void (*)(int)) catcher; - sigaction(SIGALRM, &sa, NULL); - } + signal_SA_RESTART_empty_mask(SIGINT, (void (*)(int))finish); + signal_SA_RESTART_empty_mask(SIGALRM, (void (*)(int))catcher); catcher(); diff --git a/networking/httpd.c b/networking/httpd.c index e913728..7b7446e 100644 --- a/networking/httpd.c +++ b/networking/httpd.c @@ -1788,7 +1788,6 @@ static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr) char *header_ptr = header_ptr; Htaccess_Proxy *proxy_entry; #endif - struct sigaction sa; #if ENABLE_FEATURE_HTTPD_BASIC_AUTH int credentials = -1; /* if not required this is Ok */ #endif @@ -1819,11 +1818,7 @@ static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr) } /* Install timeout handler */ - memset(&sa, 0, sizeof(sa)); - sa.sa_handler = exit_on_signal; - /* sigemptyset(&sa.sa_mask); - memset should be enough */ - /*sa.sa_flags = 0; - no SA_RESTART */ - sigaction(SIGALRM, &sa, NULL); + signal_no_SA_RESTART_empty_mask(SIGALRM, exit_on_signal); alarm(HEADER_READ_TIMEOUT); if (!get_line()) /* EOF or error or empty line */ @@ -2247,15 +2242,9 @@ static void mini_httpd_inetd(void) #if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP static void sighup_handler(int sig) { - struct sigaction sa; - parse_conf(default_path_httpd_conf, sig == SIGHUP ? SIGNALED_PARSE : FIRST_PARSE); - memset(&sa, 0, sizeof(sa)); - sa.sa_handler = sighup_handler; - /*sigemptyset(&sa.sa_mask); - memset should be enough */ - sa.sa_flags = SA_RESTART; - sigaction(SIGHUP, &sa, NULL); + signal_SA_RESTART_empty_mask(SIGHUP, sighup_handler); } #endif diff --git a/networking/inetd.c b/networking/inetd.c index 463c7cf..196f6d2 100644 --- a/networking/inetd.c +++ b/networking/inetd.c @@ -1179,15 +1179,15 @@ int inetd_main(int argc, char **argv) sigaddset(&sa.sa_mask, SIGCHLD); sigaddset(&sa.sa_mask, SIGHUP); sa.sa_handler = retry_network_setup; - sigaction(SIGALRM, &sa, NULL); + sigaction_set(SIGALRM, &sa); sa.sa_handler = reread_config_file; - sigaction(SIGHUP, &sa, NULL); + sigaction_set(SIGHUP, &sa); sa.sa_handler = reap_child; - sigaction(SIGCHLD, &sa, NULL); + sigaction_set(SIGCHLD, &sa); sa.sa_handler = clean_up_and_exit; - sigaction(SIGTERM, &sa, NULL); + sigaction_set(SIGTERM, &sa); sa.sa_handler = clean_up_and_exit; - sigaction(SIGINT, &sa, NULL); + sigaction_set(SIGINT, &sa); sa.sa_handler = SIG_IGN; sigaction(SIGPIPE, &sa, &saved_pipe_handler); @@ -1382,7 +1382,7 @@ int inetd_main(int argc, char **argv) * for nowait stream children */ for (sep2 = serv_list; sep2; sep2 = sep2->se_next) maybe_close(sep2->se_fd); - sigaction(SIGPIPE, &saved_pipe_handler, NULL); + sigaction_set(SIGPIPE, &saved_pipe_handler); unblock_sigs(&omask); BB_EXECVP(sep->se_program, sep->se_argv); bb_perror_msg("exec %s", sep->se_program); diff --git a/networking/wget.c b/networking/wget.c index 36a8356..a77a2ad 100644 --- a/networking/wget.c +++ b/networking/wget.c @@ -144,13 +144,8 @@ static void progressmeter(int flag) transferred = 0; fputc('\n', stderr); } else { - if (flag == -1) { - /* first call to progressmeter */ - struct sigaction sa; - sa.sa_handler = progressmeter; - sigemptyset(&sa.sa_mask); - sa.sa_flags = SA_RESTART; - sigaction(SIGALRM, &sa, NULL); + if (flag == -1) { /* first call to progressmeter */ + signal_SA_RESTART_empty_mask(SIGALRM, progressmeter); } alarm(1); } diff --git a/shell/ash.c b/shell/ash.c index 9b1a730..6f675ce 100644 --- a/shell/ash.c +++ b/shell/ash.c @@ -3340,7 +3340,7 @@ setsignal(int signo) *t = action; act.sa_flags = 0; sigfillset(&act.sa_mask); - sigaction(signo, &act, NULL); + sigaction_set(signo, &act); } /* mode flags for set_curjob */ diff --git a/shell/hush.c b/shell/hush.c index b44f35b..baa2db7 100644 --- a/shell/hush.c +++ b/shell/hush.c @@ -699,16 +699,6 @@ static const struct built_in_command bltins[] = { #if ENABLE_HUSH_JOB -/* move to libbb? */ -static void signal_SA_RESTART(int sig, void (*handler)(int)) -{ - struct sigaction sa; - sa.sa_handler = handler; - sa.sa_flags = SA_RESTART; - sigemptyset(&sa.sa_mask); - sigaction(sig, &sa, NULL); -} - /* Signals are grouped, we handle them in batches */ static void set_fatal_sighandler(void (*handler)(int)) { @@ -2115,7 +2105,7 @@ static int run_list(struct pipe *pi) #if ENABLE_FEATURE_SH_STANDALONE nofork_save.saved = 0; /* in case we will run a nofork later */ #endif - signal_SA_RESTART(SIGTSTP, handler_ctrl_z); + signal_SA_RESTART_empty_mask(SIGTSTP, handler_ctrl_z); signal(SIGINT, handler_ctrl_c); } #endif /* JOB */ |