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#include <signal.h>

#include <sys/wait.h>

在父进程中注册子进程退出时操作：

子进程退出函数child_wait:

static void child_wait (int sig){ int pid; int status; while ((pid = waitpid (-1, &status, WNOHANG)) > 0) { if (WIFEXITED (status)) printf ("--pid=%d--status=%x--rc=%d---/n", pid, status, WEXITSTATUS(status)); else if (WIFSIGNALED(status)) printf ("--pid=%d--signal=%d--/n", pid, WTERMSIG(status)); }} 

父进程注册退出函数

struct sigaction siga;siga.sa_handler = child_wait;siga.sa_flags = 0;memset(&siga.sa_mask, 0, sizeof(sigset_t)); 

父进程生成子进程：

pid_t pid;pid = vfork();if (pid > 0){fprintf (stderr, "new child, pid: %d./n", pid);}else if (pid == 0) {/* child process*/if (execl (workpath, name, NULL) < 0){printf("execl failed/n");}_exit (1);}else {/* father process */perror ("vfork");}