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/* 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.
*/
#include "busybox.h"
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'));
/* Parse any options */
argc--;
arg = *++argv;
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 {
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 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;
}
/* 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;
}
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;
}
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