linux - 如何等待进程子进程？

Question

我执行通常的 fork + exec 组合:

int sockets [2];
socketpair (AF_LOCAL, SOCK_STREAM, 0, sockets);
int pid = fork ();

if (pid == 0) {
  // child
  dup2 (sockets[0], STDIN_FILENO);
  dup2 (sockets[0], STDOUT_FILENO);
  execvp (argv[0], argv);
  _exit (123);
}
// parent

close (sockets[0]);
// TODO wait and see if child crashes

是否可以等到子进程崩溃或开始等待 read(...)？

Answer 1

checkout waitpid

 pid_t waitpid(pid_t pid, int *stat_loc, int options);

来自

#include <sys/wait.h>