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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [sim/] [testsuite/] [sim/] [cris/] [c/] [pipe6.c] - Blame information for rev 157

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Line No. Rev Author Line
1 24 jeremybenn
/* Check that writing an inordinate amount of data works (somewhat).
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#notarget: cris*-*-elf
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#output: got: a\nexit: 0\n
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   This test-case will *not* work on host (or for real): the first
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   pipemax+1 bytes will be successfully written.  It's just for
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   exercising a rare execution path.  */
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#include <stddef.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <limits.h>
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#include <unistd.h>
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#include <sched.h>
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#include <signal.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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int pip[2];
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int pipemax;
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int
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process (void *arg)
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{
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  char *s = arg;
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  char *buf = calloc (pipemax * 100, 1);
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  int ret;
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  if (buf == NULL)
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    abort ();
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  *buf = *s;
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  ret = write (pip[1], buf, pipemax * 100);
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  if (ret != -1 || errno != EFBIG)
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    {
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      perror ("write");
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      abort ();
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    }
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  return 0;
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}
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int
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main (void)
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{
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  int retcode;
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  int pid;
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  int st = 0;
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  long stack[16384];
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  char buf[1];
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  retcode = pipe (pip);
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  if (retcode != 0)
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    {
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      fprintf (stderr, "Bad pipe %d\n", retcode);
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      abort ();
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    }
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#ifdef PIPE_MAX
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  pipemax = PIPE_MAX;
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#else
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  pipemax = fpathconf (pip[1], _PC_PIPE_BUF);
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#endif
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  if (pipemax <= 0)
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    {
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      fprintf (stderr, "Bad pipemax %d\n", pipemax);
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      abort ();
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    }
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  pid = clone (process, (char *) stack + sizeof (stack) - 64,
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               (CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND)
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               | SIGCHLD, "ab");
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  if (pid <= 0)
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    {
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      fprintf (stderr, "Bad clone %d\n", pid);
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      abort ();
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    }
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  while ((retcode = read (pip[0], buf, 1)) == 0)
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    ;
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  if (retcode != 1)
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    {
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      fprintf (stderr, "Bad read 1: %d\n", retcode);
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      abort ();
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    }
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  printf ("got: %c\n", buf[0]);
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  if (close (pip[0]) != 0)
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    {
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      perror ("pip close");
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      abort ();
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    }
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  retcode = waitpid (pid, &st, __WALL);
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  if (retcode != pid || !WIFEXITED (st))
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    {
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      fprintf (stderr, "Bad wait %d:%d %x\n", pid, retcode, st);
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      perror ("errno");
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      abort ();
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    }
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  printf ("exit: %d\n", WEXITSTATUS (st));
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  return 0;
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}

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