使用execl的C线程会自杀

我的问题是：我的代码应该同时执行当前目录中的所有可执行文件（即所有二进制文件和所有脚本）。 代码如下：

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>
#include <dirent.h>   

/* struct created for passing arguments at every thread */
struct thread_data {

  long  thread_id;
  char *nome_file;
};

/* task of every thread */
void *work(void *thread_args) {

  long tid;
  char *name;
  struct thread_data *my_data;

  my_data = (struct thread_data *)thread_args;
  tid = my_data -> thread_id;
  name = my_data -> nome_file;
  printf("thread number %ld get file %s\n", tid, name); 
  execl(name, name, (char *)0);
  printf("execl failed\n");
  pthread_exit(NULL);
}

int filter(const struct dirent *entry) {

  /* Filter for scandir(): I consider only the regular files */
  if(entry -> d_type == DT_REG)
    return 1;
  else
    return 0;
}

int main() {

  int n, rc;
  long t;  
  struct dirent **namelist;
  pthread_attr_t attr;
  void *status;
  /* Number of regular files in the current directory */
  n = scandir(".", &namelist, filter, alphasort);
  if(n < 0) {
    perror("scandir()");
    exit(EXIT_FAILURE);
  }
  /* How many threads? */
  pthread_t thread[n];
  /* Every thread will receive one instance of the struct thread_data */
  struct thread_data thread_data_array[n];

  /* With this, I'm sure my threads will be joinable */
  pthread_attr_init(&attr);
  pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);

  for(t=0; t<n; t++) {
    printf("Main: creating thread %ld\n", t);
    /* Filling the arguments in the struct */
    thread_data_array[t].thread_id = t;
    thread_data_array[t].nome_file = namelist[t] -> d_name;
    rc = pthread_create(&thread[t], &attr, work, (void *)&thread_data_array[t]);
    if(rc) {
       printf("ERROR: pthread_create() is %d\n", rc);
       exit(EXIT_FAILURE);
    }
  }

  pthread_attr_destroy(&attr);
  for(t=0; t<n; t++) {
    rc = pthread_join(thread[t], &status);
    if(rc) {
      printf("ERROR: pthread_join() is %d\n", rc);
      exit(EXIT_FAILURE);
    }
    printf("Main: join succeeded on thread %ld\n", t);
  }

  printf("Main: program finished. Quitting...\n");
  pthread_exit(NULL);

}

---

然后，他不会继续执行其他文件。如果成功，错误可能在execl返回值中…

所有

exec

-系列函数在成功时用指定的可执行文件替换当前进程（非线程）；他们回来的唯一途径就是失败。您应该使用

fork

后跟

execl

，或者最好使用

posix_spawn

所有

exec

-系列函数在成功时用指定的可执行文件替换当前进程（非线程）；他们回来的唯一途径就是失败。您应该使用

fork

后跟

execl

，或者最好使用

posix\u-spawn
我不知道应该将posix\u-spawn放在哪里：（您现在尝试使用
execl
的方式是您使用
posix\u-spawn
的方式。我不知道应该将posix\u-spawn放在哪里：（您现在尝试使用
execl
的方式就是使用
posix\u spawn
的方式。
Main: creating thread 0
Main: creating thread 1
Main: creating thread 2
Main: creating thread 3
Main: creating thread 4
Main: creating thread 5
Main: creating thread 6
thread number 0 get file slide.pdf
execl failed
thread number 1 get file hello.sh
Congrats, you executed this script, I'm hello.sh!