ubase

suckless linux base utils
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commit a32345028e7ff5899f39836f9424102af07fea0e
parent d0dc4dc2b7cdd3cabd339342d13fd994bdba2d6a
Author: sin <sin@2f30.org>
Date:   Thu Mar  6 11:13:47 +0000

Add initial version of killall5(8)

Diffstat:
Makefile | 1+
killall5.c | 78++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 79 insertions(+), 0 deletions(-)
diff --git a/Makefile b/Makefile @@ -29,6 +29,7 @@ SRC = \ halt.c \ id.c \ insmod.c \ + killall5.c \ lsmod.c \ lsusb.c \ mknod.c \ diff --git a/killall5.c b/killall5.c @@ -0,0 +1,78 @@ +/* See LICENSE file for copyright and license details. */ +#include <dirent.h> +#include <limits.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <strings.h> +#include <unistd.h> +#include "proc.h" +#include "util.h" + +struct { + const char *name; + int sig; +} sigs[] = { +#define SIG(n) { #n, SIG##n } + SIG(ABRT), SIG(ALRM), SIG(BUS), SIG(CHLD), SIG(CONT), SIG(FPE), SIG(HUP), + SIG(ILL), SIG(INT), SIG(KILL), SIG(PIPE), SIG(QUIT), SIG(SEGV), SIG(STOP), + SIG(TERM), SIG(TSTP), SIG(TTIN), SIG(TTOU), SIG(USR1), SIG(USR2), SIG(URG), +#undef SIG +}; + +static void +usage(void) +{ + eprintf("usage: %s [-s signal]\n", argv0); +} + +int +main(int argc, char *argv[]) +{ + DIR *dp; + struct dirent *entry; + char *end, *v; + int sig = SIGTERM; + pid_t pid; + size_t i; + + ARGBEGIN { + case 's': + v = EARGF(usage()); + sig = strtol(v, &end, 0); + if(*end == '\0') + break; + for(i = 0; i < LEN(sigs); i++) { + if(strcasecmp(v, sigs[i].name) == 0) { + sig = sigs[i].sig; + break; + } + } + if(i == LEN(sigs)) + eprintf("%s: unknown signal\n", v); + break; + default: + usage(); + } ARGEND; + + if (sig != SIGSTOP && sig != SIGCONT) + kill(-1, SIGSTOP); + + if (!(dp = opendir("/proc"))) + eprintf("opendir /proc:"); + while ((entry = readdir(dp))) { + if (!pidfile(entry->d_name)) + continue; + pid = estrtol(entry->d_name, 10); + if (pid == 1 || pid == getpid() || + getsid(pid) == getsid(0) || getsid(pid) == 0) + continue; + kill(pid, sig); + } + closedir(dp); + + if (sig != SIGSTOP && sig != SIGCONT) + kill(-1, SIGCONT); + + return EXIT_SUCCESS; +}