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From: randy@retix.retix.COM (Miyazaki Randy)
Newsgroups: comp.unix.questions
Subject: Unix doesn't work !
Message-ID: <407@retix.retix.COM>
Date: 24 Mar 89 02:14:24 GMT
Reply-To: randy@retix.retix.com.UUCP (Miyazaki Randy)
Distribution: usa
Organization: Retix, Santa Monica CA
Lines: 31

Why does the child read not terminate with a End of File indication ?
Bizzarely enough, the program hangs both under BSD 4.3 and
S5R3 (Interactive VP/IX 1.0.6). This seems to contradict any
documentation on pipes I have seen.

int pipefd[2];
char buf;

main()
{
  int len;
  
  if (pipe(pipefd) < 0)
    {
      perror("pipe");
      exit(1);
    }
  if (fork())
    {
      /* Parent process here */
      printf("reading...\n");
      len = read(pipefd[0], &buf, 1);
      printf("child read return %d\n", len);
      if (len < 0)
	perror("read");
      exit(0);
    }
  sleep(2);
  printf("child process exiting, parent read should return EOF\n");
  exit(0);
}