最简单的Linux关机命令程序

#include <signal.h>

#include <stdio.h>

#include <unistd.h>

#include <sys/reboot.h>

int main(int argc, char **argv)

{

/* first disable all our signals */

sigset_t set;

sigfillset(&set);

sigprocmask(SIG_BLOCK, &set, NULL);

/* send signals to all processes _except_ pid 1 */

printf("sending SIGTERM signal to all processes\n");

kill(-1, SIGTERM);

sync();

sleep(3);

printf("sending SIGKILL signal to all processes\n");

kill(-1, SIGKILL);

sync();

sleep(3);

/* shutdown */

printf("system shutdown\n");

sleep(2);

reboot(RB_POWER_OFF);

}

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