* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*/
-#include "busybox.h"
+#include "libbb.h"
/* Note: kill_main is directly called from shell in order to implement
* kill built-in. Shell substitutes job ids with process groups first.
* This is needed to avoid collision with kill -9 ... syntax
*/
-int kill_main(int argc, char **argv);
int kill_main(int argc, char **argv)
{
char *arg;
if (arg[1] == 'l' && arg[2] == '\0') {
if (argc == 1) {
/* Print the whole signal list */
- for (signo = 1; signo < 32; signo++) {
- const char *name = get_signame(signo);
- if (!isdigit(name[0]))
- puts(name);
- }
- } else { /* -l <sig list> */
- while ((arg = *++argv)) {
- if (isdigit(arg[0])) {
- signo = bb_strtou(arg, NULL, 10);
- if (errno) {
- bb_error_msg("unknown signal '%s'", arg);
- return EXIT_FAILURE;
- }
- /* Exitcodes >= 0x80 are to be treated
- * as "killed by signal (exitcode & 0x7f)" */
- puts(get_signame(signo & 0x7f));
- /* TODO: 'bad' signal# - coreutils says:
- * kill: 127: invalid signal
- * we just print "127" instead */
- } else {
- signo = get_signum(arg);
- if (signo < 0) {
- bb_error_msg("unknown signal '%s'", arg);
- return EXIT_FAILURE;
- }
- printf("%d\n", signo);
+ print_signames();
+ return 0;
+ }
+ /* -l <sig list> */
+ while ((arg = *++argv)) {
+ if (isdigit(arg[0])) {
+ signo = bb_strtou(arg, NULL, 10);
+ if (errno) {
+ bb_error_msg("unknown signal '%s'", arg);
+ return EXIT_FAILURE;
+ }
+ /* Exitcodes >= 0x80 are to be treated
+ * as "killed by signal (exitcode & 0x7f)" */
+ puts(get_signame(signo & 0x7f));
+ /* TODO: 'bad' signal# - coreutils says:
+ * kill: 127: invalid signal
+ * we just print "127" instead */
+ } else {
+ signo = get_signum(arg);
+ if (signo < 0) {
+ bb_error_msg("unknown signal '%s'", arg);
+ return EXIT_FAILURE;
}
+ printf("%d\n", signo);
}
}
/* If they specified -l, we are all done */
quiet = 1;
arg = *++argv;
argc--;
- if (argc < 1) bb_show_usage();
- if (arg[0] != '-') goto do_it_now;
+ if (argc < 1)
+ bb_show_usage();
+ if (arg[0] != '-')
+ goto do_it_now;
}
- /* -SIG */
- signo = get_signum(&arg[1]);
+ arg++; /* skip '-' */
+
+ /* -o PID? (if present, it always is at the end of command line) */
+ if (killall5 && arg[0] == 'o')
+ goto do_it_now;
+
+ if (argc > 1 && arg[0] == 's' && arg[1] == '\0') { /* -s SIG? */
+ argc--;
+ arg = *++argv;
+ } /* else it must be -SIG */
+ signo = get_signum(arg);
if (signo < 0) { /* || signo > MAX_SIGNUM ? */
- bb_error_msg("bad signal name '%s'", &arg[1]);
+ bb_error_msg("bad signal name '%s'", arg);
return EXIT_FAILURE;
}
arg = *++argv;
argc--;
-do_it_now:
+ do_it_now:
+ pid = getpid();
if (killall5) {
pid_t sid;
procps_status_t* p = NULL;
+ int ret = 0;
- /* Now stop all processes */
- kill(-1, SIGSTOP);
- /* Find out our own session id */
- pid = getpid();
+ /* Find out our session id */
sid = getsid(pid);
- /* Now kill all processes except our session */
+ /* Stop all processes */
+ kill(-1, SIGSTOP);
+ /* Signal all processes except those in 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);
+ int i;
+
+ if (p->sid == (unsigned)sid
+ || p->pid == (unsigned)pid
+ || p->pid == 1)
+ continue;
+
+ /* All remaining args must be -o PID options.
+ * Check p->pid against them. */
+ for (i = 0; i < argc; i++) {
+ pid_t omit;
+
+ arg = argv[i];
+ if (arg[0] != '-' || arg[1] != 'o') {
+ bb_error_msg("bad option '%s'", arg);
+ ret = 1;
+ goto resume;
+ }
+ arg += 2;
+ if (!arg[0] && argv[++i])
+ arg = argv[i];
+ omit = bb_strtoi(arg, NULL, 10);
+ if (errno) {
+ bb_error_msg("bad pid '%s'", arg);
+ ret = 1;
+ goto resume;
+ }
+ if (p->pid == omit)
+ goto dont_kill;
+ }
+ kill(p->pid, signo);
+ dont_kill: ;
}
+ resume:
/* And let them continue */
kill(-1, SIGCONT);
- return 0;
+ return ret;
}
/* Pid or name is required for kill/killall */
if (argc < 1) {
- puts("You need to specify whom to kill");
+ bb_error_msg("you need to specify whom to kill");
return EXIT_FAILURE;
}
if (killall) {
/* Looks like they want to do a killall. Do that */
- pid = getpid();
while (arg) {
pid_t* pidList;