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glibc  2.9
Functions
pipe.c File Reference
#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>

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Functions

void read_from_pipe (int file)
void write_to_pipe (int file)
int main (void)

Function Documentation

int main ( void  )

Definition at line 32 of file pipe.c.

{
  pid_t pid;
  int mypipe[2];

/*@group*/
  /* Create the pipe.  */
  if (pipe (mypipe))
    {
      fprintf (stderr, "Pipe failed.\n");
      return EXIT_FAILURE;
    }
/*@end group*/

  /* Create the child process.  */
  pid = fork ();
  if (pid == (pid_t) 0)
    {
      /* This is the child process.
        Close other end first.  */
      close (mypipe[1]);
      read_from_pipe (mypipe[0]);
      return EXIT_SUCCESS;
    }
  else if (pid < (pid_t) 0)
    {
      /* The fork failed.  */
      fprintf (stderr, "Fork failed.\n");
      return EXIT_FAILURE;
    }
  else
    {
      /* This is the parent process.
        Close other end first.  */
      close (mypipe[0]);
      write_to_pipe (mypipe[1]);
      return EXIT_SUCCESS;
    }
}

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void read_from_pipe ( int  file)

Definition at line 9 of file pipe.c.

{
  FILE *stream;
  int c;
  stream = fdopen (file, "r");
  while ((c = fgetc (stream)) != EOF)
    putchar (c);
  fclose (stream);
}

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void write_to_pipe ( int  file)

Definition at line 22 of file pipe.c.

{
  FILE *stream;
  stream = fdopen (file, "w");
  fprintf (stream, "hello, world!\n");
  fprintf (stream, "goodbye, world!\n");
  fclose (stream);
}

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