-#include "internal.h"
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <signal.h>
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini kill/killall implementation for busybox
+ *
+ * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
+ *
+ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+ */
-const char kill_usage[] = "kill [-signal] process-id [process-id ...]\n";
+#include "busybox.h"
-struct signal_name {
- const char * name;
- int number;
-};
+int kill_main(int argc, char **argv);
+int kill_main(int argc, char **argv)
+{
+ char *arg;
+ pid_t pid;
+ int signo = SIGTERM, errors = 0, quiet = 0;
+ const int killall = (ENABLE_KILLALL && applet_name[4] == 'a'
+ && (!ENABLE_KILLALL5 || applet_name[7] != '5'));
+ const int killall5 = (ENABLE_KILLALL5 && applet_name[4] == 'a'
+ && (!ENABLE_KILLALL || applet_name[7] == '5'));
-const struct signal_name signames[] = {
- { "HUP", SIGHUP },
- { "INT", SIGINT },
- { "QUIT", SIGQUIT },
- { "ILL", SIGILL },
- { "TRAP", SIGTRAP },
- { "ABRT", SIGABRT },
-#ifndef __alpha__
- { "IOT", SIGIOT },
-#endif
-#if defined(sparc) || defined(__alpha__)
- { "EMT", SIGEMT },
-#else
- { "BUS", SIGBUS },
-#endif
- { "FPE", SIGFPE },
- { "KILL", SIGKILL },
-#if defined(sparc) || defined(__alpha__)
- { "BUS", SIGBUS },
-#else
- { "USR1", SIGUSR1 },
-#endif
- { "SEGV", SIGSEGV },
-#if defined(sparc) || defined(__alpha__)
- { "SYS", SIGSYS },
-#else
- { "USR2", SIGUSR2 },
-#endif
- { "PIPE", SIGPIPE },
- { "ALRM", SIGALRM },
- { "TERM", SIGTERM },
-#if defined(sparc) || defined(__alpha__)
- { "URG", SIGURG },
- { "STOP", SIGSTOP },
- { "TSTP", SIGTSTP },
- { "CONT", SIGCONT },
- { "CHLD", SIGCHLD },
- { "TTIN", SIGTTIN },
- { "TTOU", SIGTTOU },
- { "IO", SIGIO },
-# ifndef __alpha__
- { "POLL", SIGIO },
-# endif
- { "XCPU", SIGXCPU },
- { "XFSZ", SIGXFSZ },
- { "VTALRM", SIGVTALRM },
- { "PROF", SIGPROF },
- { "WINCH", SIGWINCH },
-# ifdef __alpha__
- { "INFO", SIGINFO },
-# else
- { "LOST", SIGLOST },
-# endif
- { "USR1", SIGUSR1 },
- { "USR2", SIGUSR2 },
-#else
- { "STKFLT", SIGSTKFLT },
- { "CHLD", SIGCHLD },
- { "CONT", SIGCONT },
- { "STOP", SIGSTOP },
- { "TSTP", SIGTSTP },
- { "TTIN", SIGTTIN },
- { "TTOU", SIGTTOU },
- { "URG", SIGURG },
- { "XCPU", SIGXCPU },
- { "XFSZ", SIGXFSZ },
- { "VTALRM", SIGVTALRM },
- { "PROF", SIGPROF },
- { "WINCH", SIGWINCH },
- { "IO", SIGIO },
- { "POLL", SIGPOLL },
- { "PWR", SIGPWR },
- { "UNUSED", SIGUNUSED },
-#endif
- { 0, 0 }
-};
+ /* Parse any options */
+ argc--;
+ arg = *++argv;
-extern int
-kill_main(struct FileInfo * i, int argc, char * * argv)
-{
- int had_error = 0;
- int sig = SIGTERM;
- if ( argv[1][0] == '-' ) {
- if ( argv[1][1] >= '0' && argv[1][1] <= '9' ) {
- sig = atoi(&argv[1][1]);
- if ( sig < 0 || sig >= NSIG ) {
- usage(kill_usage);
- exit(-1);
- }
- }
- else {
- const struct signal_name * s = signames;
- for ( ; ; ) {
- if ( strcmp(s->name, &argv[1][1]) == 0 ) {
- sig = s->number;
- break;
+ if (argc < 1 || arg[0] != '-') {
+ goto do_it_now;
+ }
+
+ /* The -l option, which prints out signal names. */
+ if (arg[1] == 'l' && arg[2] == '\0') {
+ const char *name;
+ if (argc == 1) {
+ /* Print the whole signal list */
+ int col = 0;
+ for (signo = 1; signo < 32; signo++) {
+ name = get_signame(signo);
+ if (isdigit(name[0])) continue;
+ if (col > 66) {
+ puts("");
+ col = 0;
}
- s++;
- if ( s->name == 0 ) {
- usage(kill_usage);
- exit(-1);
+ col += printf("%2d) %-6s", signo, name);
+ }
+ puts("");
+ } else { /* -l <sig list> */
+ while ((arg = *++argv)) {
+ if (isdigit(arg[0])) {
+ signo = xatoi_u(arg);
+ name = get_signame(signo);
+ } else {
+ signo = get_signum(arg);
+ if (signo < 0)
+ bb_error_msg_and_die("unknown signal '%s'", arg);
+ name = get_signame(signo);
}
+ printf("%2d) %s\n", signo, name);
}
}
- argv++;
+ /* If they specified -l, we are all done */
+ return EXIT_SUCCESS;
+ }
+
+ /* The -q quiet option */
+ if (killall && arg[1] == 'q' && arg[2] == '\0') {
+ quiet = 1;
+ arg = *++argv;
argc--;
+ if (argc < 1) bb_show_usage();
+ if (arg[0] != '-') goto do_it_now;
+ }
+
+ /* -SIG */
+ signo = get_signum(&arg[1]);
+ if (signo < 0)
+ bb_error_msg_and_die("bad signal name '%s'", &arg[1]);
+ arg = *++argv;
+ argc--;
+
+do_it_now:
+
+ if (killall5) {
+ pid_t sid;
+ procps_status_t* p = NULL;
+// Cannot happen anyway? We don't TERM ourself, we STOP
+// /* kill(-1, sig) on Linux (at least 2.1.x)
+// * might send signal to the calling process too */
+// signal(SIGTERM, SIG_IGN);
+ /* Now stop all processes */
+ kill(-1, SIGSTOP);
+ /* Find out our own session id */
+ pid = getpid();
+ sid = getsid(pid);
+ /* Now kill all processes except our session */
+ while ((p = procps_scan(p, PSSCAN_PID|PSSCAN_SID))) {
+ if (p->sid != sid && p->pid != pid && p->pid != 1)
+ kill(p->pid, signo);
+ }
+ /* And let them continue */
+ kill(-1, SIGCONT);
+ return 0;
}
- while ( argc > 1 ) {
- int pid;
- if ( argv[1][0] < '0' || argv[1][0] > '9' ) {
- usage(kill_usage);
- exit(-1);
+
+ /* Pid or name required for kill/killall */
+ if (argc < 1)
+ bb_show_usage();
+
+ if (killall) {
+ /* Looks like they want to do a killall. Do that */
+ pid = getpid();
+ while (arg) {
+ pid_t* pidList;
+
+ pidList = find_pid_by_name(arg);
+ if (*pidList == 0) {
+ errors++;
+ if (!quiet)
+ bb_error_msg("%s: no process killed", arg);
+ } else {
+ pid_t *pl;
+
+ for (pl = pidList; *pl; pl++) {
+ if (*pl == pid)
+ continue;
+ if (kill(*pl, signo) == 0)
+ continue;
+ errors++;
+ if (!quiet)
+ bb_perror_msg("cannot kill pid %u", (unsigned)*pl);
+ }
+ }
+ free(pidList);
+ arg = *++argv;
}
- pid = atoi(argv[1]);
- if ( kill(pid, sig) != 0 ) {
- had_error = 1;
- perror(argv[1]);
+ return errors;
+ }
+
+ /* Looks like they want to do a kill. Do that */
+ while (arg) {
+ /* Huh?
+ if (!isdigit(arg[0]) && arg[0] != '-')
+ bb_error_msg_and_die("bad pid '%s'", arg);
+ */
+ pid = xatou(arg);
+ /* FIXME: better overflow check? */
+ if (kill(pid, signo) != 0) {
+ bb_perror_msg("cannot kill pid %u", (unsigned)pid);
+ errors++;
}
- argv++;
- argc--;
+ arg = *++argv;
}
- if ( had_error )
- return -1;
- else
- return 0;
+ return errors;
}
projects / oweals / busybox.git / blobdiff