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123 lines
2.6 KiB
123 lines
2.6 KiB
4 months ago
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/* killall.c - Send signal (default: TERM) to all processes with given names.
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*
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* Copyright 2012 Andreas Heck <aheck@gmx.de>
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*
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* http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/killall.html
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USE_KILLALL(NEWTOY(killall, "?s:ilqvw", TOYFLAG_USR|TOYFLAG_BIN))
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config KILLALL
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bool "killall"
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default y
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help
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usage: killall [-l] [-iqv] [-SIGNAL|-s SIGNAL] PROCESS_NAME...
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Send a signal (default: TERM) to all processes with the given names.
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-i Ask for confirmation before killing
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-l Print list of all available signals
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-q Don't print any warnings or error messages
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-s Send SIGNAL instead of SIGTERM
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-v Report if the signal was successfully sent
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-w Wait until all signaled processes are dead
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*/
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#define FOR_killall
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#include "toys.h"
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GLOBALS(
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char *s;
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int signum;
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pid_t cur_pid;
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char **names;
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short *err;
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struct int_list { struct int_list *next; int val; } *pids;
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)
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static int kill_process(pid_t pid, char *name)
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{
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int offset = 0;
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if (pid == TT.cur_pid) return 0;
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if (FLAG(i)) {
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fprintf(stderr, "Signal %s(%d)", name, (int)pid);
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if (!yesno(0)) return 0;
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}
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errno = 0;
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kill(pid, TT.signum);
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if (FLAG(w)) {
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struct int_list *new = xmalloc(sizeof(*TT.pids));
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new->val = pid;
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new->next = TT.pids;
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TT.pids = new;
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}
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for (;;) {
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if (TT.names[offset] == name) {
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TT.err[offset] = errno;
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break;
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} else offset++;
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}
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if (errno) {
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if (!FLAG(q)) perror_msg("pid %d", (int)pid);
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} else if (FLAG(v))
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printf("Killed %s(%d) with signal %d\n", name, pid, TT.signum);
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return 0;
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}
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void killall_main(void)
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{
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int i;
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TT.names = toys.optargs;
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TT.signum = SIGTERM;
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if (FLAG(l)) {
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list_signals();
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return;
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}
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if (TT.s || (*TT.names && **TT.names == '-')) {
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if (0 > (TT.signum = sig_to_num(TT.s ? TT.s : (*TT.names)+1))) {
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if (FLAG(q)) exit(1);
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error_exit("Invalid signal");
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}
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if (!TT.s) {
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TT.names++;
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toys.optc--;
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}
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}
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if (!toys.optc) help_exit("no name");
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TT.cur_pid = getpid();
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TT.err = xmalloc(2*toys.optc);
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for (i=0; i<toys.optc; i++) TT.err[i] = ESRCH;
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names_to_pid(TT.names, kill_process, 1);
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for (i=0; i<toys.optc; i++) {
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if (TT.err[i]) {
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toys.exitval = 1;
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errno = TT.err[i];
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perror_msg_raw(TT.names[i]);
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}
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}
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if (FLAG(w)) {
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for (;;) {
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struct int_list *p = TT.pids;
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int c = 0;
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for (; p; p=p->next) if (kill(p->val, 0) != -1 || errno != ESRCH) ++c;
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if (!c) break;
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sleep(1);
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}
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}
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if (CFG_TOYBOX_FREE) {
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free(TT.err);
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llist_traverse(TT.pids, free);
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}
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}
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