执行python脚本并在c中获取脚本pid

Question

我想在c中执行一个python脚本来获取一个自定义的可执行文件名，但我的所有尝试都失败了，因为它总是涉及一些子进程，我没有pid来联系＆＃39;它...

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <signal.h>
#include <sys/ipc.h>
#include <sys/shm.h>

void  SIGINT_handler(int);
void  SIGTERM_handler(int);
void  SIGUSR1_handler(int);

int   ShmID;
pid_t *ShmPTR;
pid_t c_pid; // should be the script pid

int main(void) {
  pid_t p_pid = getpid();
  key_t MyKey;
  if (signal(SIGINT, SIGINT_handler) == SIG_ERR) {
    printf("SIGINT install error\n");
    exit(1);
  }
  if (signal(SIGTERM, SIGTERM_handler) == SIG_ERR) {
    printf("SIGTERM install error\n");
    exit(2);
  }
  if (signal(SIGUSR1, SIGUSR1_handler) == SIG_ERR) {
    printf("SIGUSR1 install error\n");
    exit(3);
  }
  MyKey   = ftok(".", 's');
  ShmID   = shmget(MyKey, sizeof(pid_t), IPC_CREAT | 0666);
  ShmPTR  = (pid_t *) shmat(ShmID, NULL, 0);
  *ShmPTR = p_pid;

  //---This is where I'm stuck---
}

void  SIGINT_handler(int sig) {
  signal(sig, SIG_IGN);
  kill(c_pid, sig);//send interrupt signal to pyton script
  printf("From SIGINT: just got a %d (SIGINT ^C) signal\n", sig);
  signal(sig, SIGINT_handler);
}

void  SIGTERM_handler(int sig) {
  signal(sig, SIG_IGN);
  kill(c_pid, sig);//send terminate signal to python script
  printf("From SIGTERM: just got a %d (SIGTERM ^\\) signal"
                          " and is about to quit\n", sig);
  shmdt(ShmPTR);
  shmctl(ShmID, IPC_RMID, NULL);

  exit(3);
}

void  SIGUSR1_handler(int sig) {
  signal(sig, SIG_IGN);
  kill(c_pid, sig);//send user signal 1 to python script
  printf("From SIGUSR1: just got a %d (SIGUSR1 ^C) signal\n", sig);
  signal(sig, SIGUSR1_handler);
}

  

免责声明：我更多是C的初学者

我该怎么做呢？