prg4_5.c

配套光盘网络编程进程间的通信,网络编程进程间的通信是一本很经典的好书

#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>

#define		MAXLINE		 100
int main(int argc,int **argv)
{
  size_t  n;
  char  buff[MAXLINE],command[MAXLINE];
  FILE  *fp;
  
  fgets(buff,MAXLINE,stdin);
  n = strlen(buff);
  if (buff[n-1] == '\n')
  	n--;
  snprintf(command,sizeof(command),"cat %s",buff);
  fp = popen(command,"r");
  
  while(fgets(buff,MAXLINE,fp) != NULL)
  	fputs(buff,stdout);
  
  pclose(fp);
  exit(0);
}