#include <stdlib.h>
#include <sys/wait.h>
#include <unistd.h>
#include <stdio.h>
int main( ) {
pid_t pid;
int status = -1;
if ((pid = fork()) != 0) {
printf("Father process wait child PID=%dn", pid);
wait(&status);
printf("Child finish with status: %dn",WEXITSTATUS(status));
exit(0);
}
else {
printf("Child process running...n");
execl("/bin/ls","ls", "-la", NULL);
printf("Child ending...n");
}
}
当编译这段代码时,else的最后一行不打印,我不知道为什么。
http://linux.die.net/man/3/execl
exec()函数族用新的进程映像替换当前的进程映像。…exec()函数只在发生错误时返回。返回值为-1,errno表示错误。