pipe_parcld_std.c

Linux大学上机源码学习

/* Using pipe with stdio function  */

#include "unistd.h"
#include "stdio.h"
#include "string.h"
main()
{ int fd[2],pid,n;
 FILE *fp;
  char dat[20]="hello world\n",c;
  pipe(fd);
  pid=fork();
  if(pid==0)
  { close(fd[1]);
    fp=fdopen(fd[0],"r");
    while((c=fgetc(fp))!=EOF)
      putchar(c);
  }
 else
  {
  close(fd[0]);
  fp=fdopen(fd[1],"w");
  fprintf(fp,"parent input %s",dat);
 }
exit(0);
}