simple-spawn-example.c

#include <uv.h>
#include <stdio.h>

static void
exit_cb(uv_process_t *handle, int64_t status, int signal) {
  printf("child exit: %lld, %d\n", status, signal);
}

int main(int argc, char **args) {
  uv_loop_t * loop = uv_default_loop();
  uv_process_t child_req;
  uv_process_options_t options;
  memset(&options, 0, sizeof(uv_process_options_t));

  char * _args[3];
  _args[0] = "top";
  _args[1] = ""; 
  _args[2] = NULL;

  options.exit_cb = exit_cb;
  options.file = _args[0];
  options.args = _args;
  
  int err = uv_spawn(loop, &child_req, &options);
  if (err) {
    const char * name = uv_err_name(err);
    printf("error: %s\n", name);
    return err;
  }
  uv_run(loop, UV_RUN_DEFAULT);
  printf("program exited\n");
  return 0;
}

Remember these following tips for uv_spawn API:

• 14th line: memset(&options, 0, sizeof(uv_process_options_t)) is very important.
• options.args is an array of char * type.