1 /* vi: set sw=4 ts=4: */
3 * Mini kill/killall[5] implementation for busybox
5 * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
6 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
8 * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
13 /* Note: kill_main is directly called from shell in order to implement
14 * kill built-in. Shell substitutes job ids with process groups first.
16 * This brings some complications:
18 * + we can't use xfunc here
19 * + we can't use applet_name
20 * + we can't use bb_show_usage
21 * (Above doesn't apply for killall[5] cases)
23 * kill %n gets translated into kill ' -<process group>' by shell (note space!)
24 * This is needed to avoid collision with kill -9 ... syntax
27 int kill_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
28 int kill_main(int argc, char **argv)
32 int signo = SIGTERM, errors = 0, quiet = 0;
33 #if !ENABLE_KILLALL && !ENABLE_KILLALL5
37 /* How to determine who we are? find 3rd char from the end:
38 * kill, killall, killall5
39 * ^i ^a ^l - it's unique
40 * (checking from the start is complicated by /bin/kill... case) */
41 const char char3 = argv[0][strlen(argv[0]) - 3];
42 #define killall (ENABLE_KILLALL && char3 == 'a')
43 #define killall5 (ENABLE_KILLALL5 && char3 == 'l')
46 /* Parse any options */
50 if (argc < 1 || arg[0] != '-') {
54 /* The -l option, which prints out signal names.
55 * Intended usage in shell:
56 * echo "Died of SIG`kill -l $?`"
57 * We try to mimic what kill from coreutils-6.8 does */
58 if (arg[1] == 'l' && arg[2] == '\0') {
60 /* Print the whole signal list */
65 while ((arg = *++argv)) {
66 if (isdigit(arg[0])) {
67 signo = bb_strtou(arg, NULL, 10);
69 bb_error_msg("unknown signal '%s'", arg);
72 /* Exitcodes >= 0x80 are to be treated
73 * as "killed by signal (exitcode & 0x7f)" */
74 puts(get_signame(signo & 0x7f));
75 /* TODO: 'bad' signal# - coreutils says:
76 * kill: 127: invalid signal
77 * we just print "127" instead */
79 signo = get_signum(arg);
81 bb_error_msg("unknown signal '%s'", arg);
84 printf("%d\n", signo);
87 /* If they specified -l, we are all done */
91 /* The -q quiet option */
92 if (killall && arg[1] == 'q' && arg[2] == '\0') {
96 if (argc < 1) bb_show_usage();
97 if (arg[0] != '-') goto do_it_now;
101 signo = get_signum(&arg[1]);
102 if (signo < 0) { /* || signo > MAX_SIGNUM ? */
103 bb_error_msg("bad signal name '%s'", &arg[1]);
113 procps_status_t* p = NULL;
115 /* Now stop all processes */
117 /* Find out our own session id */
120 /* Now kill all processes except our session */
121 while ((p = procps_scan(p, PSSCAN_PID|PSSCAN_SID))) {
122 if (p->sid != sid && p->pid != pid && p->pid != 1)
125 /* And let them continue */
130 /* Pid or name is required for kill/killall */
132 puts("You need to specify whom to kill");
137 /* Looks like they want to do a killall. Do that */
142 pidList = find_pid_by_name(arg);
146 bb_error_msg("%s: no process killed", arg);
150 for (pl = pidList; *pl; pl++) {
153 if (kill(*pl, signo) == 0)
157 bb_perror_msg("cannot kill pid %u", (unsigned)*pl);
166 /* Looks like they want to do a kill. Do that */
168 /* Support shell 'space' trick */
171 pid = bb_strtoi(arg, NULL, 10);
173 bb_error_msg("bad pid '%s'", arg);
175 } else if (kill(pid, signo) != 0) {
176 bb_perror_msg("cannot kill pid %d", (int)pid);