sim/testsuite/sim/cris/c/pipe4.c

   1 /* Check that TRT happens for pipe corner cases.
   2 #notarget: cris*-*-elf
   3 */
   4 #include <stddef.h>
   5 #include <signal.h>
   6 #include <stdlib.h>
   7 #include <stdio.h>
   8 #include <unistd.h>
   9 #include <errno.h>
  10 #include <limits.h>
  11
  12 void err (const char *s)
  13 {
  14   perror (s);
  15   abort ();
  16 }
  17
  18 int main (void)
  19 {
  20   int pip[2];
  21   char c;
  22   int pipemax;
  23
  24   if (pipe (pip) != 0)
  25     err ("pipe");
  26
  27 #ifdef PIPE_MAX
  28   pipemax = PIPE_MAX;
  29 #else
  30   pipemax = fpathconf (pip[1], _PC_PIPE_BUF);
  31 #endif
  32
  33   if (pipemax <= 0)
  34     {
  35       fprintf (stderr, "Bad pipemax %d\n", pipemax);
  36       abort ();
  37     }
  38
  39   /* Writing to wrong end of pipe.  */
  40   if (write (pip[0], "argh", 1) != -1
  41       || errno != EBADF)
  42     err ("write pipe");
  43
  44   errno = 0;
  45
  46   /* Reading from wrong end of pipe.  */
  47   if (read (pip[1], &c, 1) != -1
  48       || errno != EBADF)
  49     err ("write pipe");
  50
  51   errno = 0;
  52
  53   if (close (pip[0]) != 0)
  54     err ("close");
  55
  56   if (signal (SIGPIPE, SIG_IGN) != SIG_DFL)
  57     err ("signal");
  58
  59   /* Writing to pipe with closed read end.  */
  60   if (write (pip[1], "argh", 1) != -1
  61       || errno != EPIPE)
  62     err ("write closed");
  63
  64   printf ("pass\n");
  65   exit (0);
  66 }