c - 调用c文件时如何添加参数

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7年前关闭。
好的，我要把我的代码贴出来。我解释了我以前想做的事情。把我的c文件都发出去，希望你能找到我的错误。谢谢你
我是myfork.c

#include <stdio.h>
#include <unistd.h>
int main(int argc,char *argv[])
{
  int pid;
  int s;
  int waitPid;
  int childPid;

  pid = fork();
  if (pid == 0 && pid != -1) {
    childPid = getpid();
    printf("Child Process ID:%d, Parent ID:%d, Process "
           "Group:%d\n",childPid,getppid(),getgid());
    execl("/bin/cat","cat","-b","-t","-v",argv[1],(char*)NULL);
  } else {
    printf("Original Process ID:%d, Parent Is:%d, Process Group "
           "Is:%d\n",childPid,getppid(),getgid());
    waitPid = waitpid(childPid,&s,0);
  }
  return 1;
}

这是测试c

#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>

int main(void){
  pid_t fork_return;
  fork_return = fork();
  if (fork_return==0) {
    printf("In the CHILD process\n");
  } else {
    printf("In the PARENT process\n");
  }
  return 0;
}

最佳答案

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/wait.h>

int main(int argc, char *argv[])
{
    int pid;
    int s;
    int waitPid;
    int childPid;

    if ((pid = fork()) == -1)
    {
        perror("fork");
        exit(1);
    }

    if (pid == 0)
    {
        printf("Child Process ID:%d, Parent ID:%d, Process Group:%d\n", getpid(), getppid(), getgid());

        execl("/bin/cat", "cat", "-b", "-t", "-v", argv[1], (char*)NULL);
    }
    else
    {
        waitPid = waitpid(pid, &s, 0);

        printf("Original Process ID:%d, Parent (of parent) Is:%d, Process Group Is:%d\n", getpid(), getppid(), getgid());
    }

    return 0;
}

./myfork测试.c
您可能需要测试execl()是否没有失败，等等，除了一些非常小的错误之外，您基本上已经有了它。最重要的是把父printf()放在waitpid()之后。

关于c - 调用c文件时如何添加参数，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/9123061/