mirror of
https://github.com/pygos/init.git
synced 2024-11-25 04:20:42 +01:00
86 lines
1.4 KiB
C
86 lines
1.4 KiB
C
/* SPDX-License-Identifier: ISC */
|
|
#include <sys/types.h>
|
|
#include <dirent.h>
|
|
#include <signal.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
#include <ctype.h>
|
|
#include <errno.h>
|
|
|
|
#include "util.h"
|
|
|
|
static NORETURN void usage_and_exit(void)
|
|
{
|
|
fputs("Usage: killall5 SIGNAL\n", stderr);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
int signo, ret = EXIT_SUCCESS;
|
|
pid_t pid, mypid, mysid;
|
|
struct dirent *ent;
|
|
const char *ptr;
|
|
DIR *dir;
|
|
|
|
if (argc != 2)
|
|
usage_and_exit();
|
|
|
|
ptr = argv[1];
|
|
if (*ptr == '-')
|
|
++ptr;
|
|
|
|
if (!isdigit(*ptr))
|
|
usage_and_exit();
|
|
|
|
for (signo = 0; isdigit(*ptr); ++ptr)
|
|
signo = signo * 10 + ((*ptr) - '0');
|
|
|
|
if (*ptr != '\0' || signo < 1 || signo > 31)
|
|
usage_and_exit();
|
|
|
|
kill(-1, SIGSTOP);
|
|
|
|
dir = opendir("/proc");
|
|
if (dir == NULL) {
|
|
perror("opendir /proc");
|
|
ret = EXIT_FAILURE;
|
|
goto out;
|
|
}
|
|
|
|
mypid = getpid();
|
|
mysid = getsid(0);
|
|
|
|
for (;;) {
|
|
errno = 0;
|
|
ent = readdir(dir);
|
|
|
|
if (ent == NULL) {
|
|
if (errno) {
|
|
perror("readdir");
|
|
ret = EXIT_FAILURE;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (!isdigit(ent->d_name[0]))
|
|
continue;
|
|
|
|
for (pid = 0, ptr = ent->d_name; isdigit(*ptr); ++ptr)
|
|
pid = pid * 10 + ((*ptr) - '0');
|
|
|
|
if (*ptr != '\0' || pid == mypid || getsid(pid) == mysid)
|
|
continue;
|
|
|
|
if (kill(pid, signo)) {
|
|
ret = EXIT_FAILURE;
|
|
fprintf(stderr, "kill %d: %s\n",
|
|
(int)pid, strerror(errno));
|
|
}
|
|
}
|
|
out:
|
|
kill(-1, SIGCONT);
|
|
return ret;
|
|
}
|