+/* vi: set sw=4 ts=4: */
/*
- * Mini kill implementation for busybox
+ * 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>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
+ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*/
+#include "busybox.h"
-#include "internal.h"
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <signal.h>
-#include <ctype.h>
-#include <sys/stat.h>
-#include <unistd.h>
-
-static const char* kill_usage = "kill [-signal] process-id [process-id ...]\n\n"
-"Send a signal (default is SIGTERM) to the specified process(es).\n\n"
-"Options:\n"
-"\t-l\tList all signal names and numbers.\n\n";
-
-
-struct signal_name {
- const char *name;
- int number;
-};
-
-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}
-};
-
-extern int kill_main (int argc, char **argv)
+int kill_main(int argc, char **argv);
+int kill_main(int argc, char **argv)
{
- int sig = SIGTERM;
-
- argc--;
- argv++;
- /* Parse any options */
- if (argc < 1)
- usage(kill_usage);
+ 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'));
- while (argc > 0 && **argv == '-') {
- while (*++(*argv)) {
- switch (**argv) {
- case 'l':
- {
- int col=0;
- const struct signal_name *s = signames;
+ /* Parse any options */
+ argc--;
+ arg = *++argv;
- while (s->name != 0) {
- col+=fprintf(stderr, "%2d) %-8s", s->number, (s++)->name);
- if (col>60) {
- fprintf(stderr, "\n");
- col=0;
- }
- }
- fprintf(stderr, "\n\n");
- exit( TRUE);
- }
- break;
- case '-':
- usage(kill_usage);
- default:
- {
- if (isdigit( **argv)) {
- sig = atoi (*argv);
- if (sig < 0 || sig >= NSIG)
- goto end;
- else {
- argc--;
- argv++;
- goto do_it_now;
+ 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;
+ }
+ col += printf("%2d) %-6s", signo, name);
}
- }
- else {
- const struct signal_name *s = signames;
- while (s->name != 0) {
- if (strcasecmp (s->name, *argv) == 0) {
- sig = s->number;
- argc--;
- argv++;
- goto do_it_now;
- }
- s++;
+ 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);
}
- if (s->name == 0)
- goto end;
- }
}
- }
- argc--;
- 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:
- while (argc >= 1) {
- int pid;
- struct stat statbuf;
- char pidpath[20]="/proc/";
-
- if (! isdigit( **argv)) {
- fprintf(stderr, "bad PID: %s\n", *argv);
- exit( FALSE);
- }
- pid = atoi (*argv);
- snprintf(pidpath, 20, "/proc/%s/stat", *argv);
- if (stat( pidpath, &statbuf)!=0) {
- fprintf(stderr, "kill: (%d) - No such pid\n", pid);
- exit( FALSE);
+ 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;
}
- if (kill (pid, sig) != 0) {
- perror (*argv);
- exit ( FALSE);
- }
- argv++;
- }
- exit ( TRUE);
+ /* Pid or name required for kill/killall */
+ if (argc < 1)
+ bb_show_usage();
-end:
- fprintf(stderr, "bad signal name: %s\n", *argv);
- exit (TRUE);
-}
+ 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;
+ }
+ 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++;
+ }
+ arg = *++argv;
+ }
+ return errors;
+}
projects / oweals / busybox.git / blobdiff