Debian僵尸进程怎么防止

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
<p>void sigchld_handler(int signum) {
while (waitpid(-1, NULL, WNOHANG) > 0);
}</p><p>int main() {
struct sigaction sa;
sa.sa_handler = sigchld_handler;
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART;
if (sigaction(SIGCHLD, &sa, NULL) == -1) {
perror("sigaction");
exit(EXIT_FAILURE);
}</p><pre class="brush:php;toolbar:false;"><code>pid_t pid = fork();
if (pid == 0) {
    // 子进程
    printf("Child process\n");
    exit(0);
} else if (pid > 0) {
    // 父进程
    printf("Parent process\n");
    while (1) {
        sleep(1);
    }
} else {
    perror("fork");
    exit(EXIT_FAILURE);
}

return 0;

<code>nohup your_command &</code>

#include <stdio.h></p><h1>include <stdlib.h></h1><h1>include <unistd.h></h1><p>int main() {
pid_t pid = fork();
if (pid == 0) {
// 子进程
setsid();
printf("Child process\n");
while (1) {
sleep(1);
}
} else if (pid > 0) {
// 父进程
printf("Parent process\n");
exit(0);
} else {
perror("fork");
exit(EXIT_FAILURE);
}</p><pre class="brush:php;toolbar:false;"><code>return 0;

<code>crontab -e</code>

<code><em> </em> <em> </em> * kill -s SIGCHLD -p $(ps -o ppid= -p $$)</code>