* 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 <stdio.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <unistd.h>
-#include <signal.h>
-#include <ctype.h>
-#include <string.h>
-#include <unistd.h>
#include "busybox.h"
-static const int KILL = 0;
-static const int KILLALL = 1;
-
-
-extern int kill_main(int argc, char **argv)
+int kill_main(int argc, char **argv)
{
- int whichApp, sig = SIGTERM;
- const char *name;
-
-#ifdef CONFIG_KILLALL
- /* Figure out what we are trying to do here */
- whichApp = (strcmp(applet_name, "killall") == 0)? KILLALL : KILL;
-#else
- whichApp = KILL;
-#endif
+ 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'));
- argc--;
- argv++;
/* Parse any options */
- if (argc < 1)
- show_usage();
+ argc--;
+ arg = *++argv;
- while (argc > 0 && **argv == '-') {
- while (*++(*argv)) {
- switch (**argv) {
- case 'l':
- if(argc>1) {
- for(argv++; *argv; argv++) {
- name = u_signal_names(*argv, &sig, -1);
- if(name!=NULL)
- printf("%s\n", name);
- }
+ 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);
+ }
+ puts("");
+ } else { /* -l <sig list> */
+ while ((arg = *++argv)) {
+ if (isdigit(arg[0])) {
+ signo = xatoi_u(arg);
+ name = get_signame(signo);
} else {
- int col = 0;
- for(sig=1; sig < NSIG; sig++) {
- name = u_signal_names(0, &sig, 1);
- if(name==NULL) /* unnamed */
- continue;
- col += printf("%2d) %-16s", sig, name);
- if (col > 60) {
- printf("\n");
- col = 0;
- }
- }
- printf("\n");
+ signo = get_signum(arg);
+ if (signo < 0)
+ bb_error_msg_and_die("unknown signal '%s'", arg);
+ name = get_signame(signo);
}
- return EXIT_SUCCESS;
- case '-':
- show_usage();
- default:
- name = u_signal_names(*argv, &sig, 0);
- if(name==NULL)
- error_msg_and_die( "bad signal name: %s", *argv);
- argc--;
- argv++;
- goto do_it_now;
- }
- argc--;
- argv++;
+ printf("%2d) %s\n", signo, name);
+ }
}
+ /* 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;
}
- 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--;
- if (whichApp == KILL) {
- /* Looks like they want to do a kill. Do that */
- while (--argc >= 0) {
- int pid;
+do_it_now:
- if (!isdigit(**argv))
- perror_msg_and_die( "Bad PID");
- pid = strtol(*argv, NULL, 0);
- if (kill(pid, sig) != 0)
- perror_msg_and_die( "Could not kill pid '%d'", pid);
- argv++;
+ 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);
}
- }
-#ifdef CONFIG_KILLALL
- else {
- int all_found = TRUE;
- pid_t myPid=getpid();
+ /* And let them continue */
+ kill(-1, SIGCONT);
+ return 0;
+ }
+
+ /* 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 */
- while (--argc >= 0) {
- long* pidList;
+ pid = getpid();
+ while (arg) {
+ pid_t* pidList;
- pidList = find_pid_by_name( *argv);
- if (!pidList || *pidList<=0) {
- all_found = FALSE;
- error_msg_and_die( "%s: no process killed", *argv);
- }
+ 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(; pidList && *pidList!=0; pidList++) {
- if (*pidList==myPid)
- continue;
- if (kill(*pidList, sig) != 0)
- perror_msg_and_die( "Could not kill pid '%d'", *pidList);
+ 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);
+ }
}
- /* Note that we don't bother to free the memory
- * allocated in find_pid_by_name(). It will be freed
- * upon exit, so we can save a byte or two */
- argv++;
+ free(pidList);
+ arg = *++argv;
}
- if (! all_found)
- return EXIT_FAILURE;
+ return errors;
}
-#endif
- return EXIT_SUCCESS;
+ /* 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