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/* Check that TRT happens for pipe corner cases (for our definition of TRT).

#notarget: cris*-*-elf

#xerror:

#output: Terminating simulation due to writing pipe * from one single thread\n

#output: program stopped with signal 4.\n

*/

#include <stddef.h>

#include <signal.h>

#include <stdlib.h>

#include <stdio.h>

#include <unistd.h>

#include <errno.h>

#include <limits.h>

void err (const char *s)

{

  perror (s);

  abort ();

}

int main (void)

{

  int pip[2];

  int pipemax;

  char *buf;

  if (pipe (pip) != 0)

    err ("pipe");

#ifdef PIPE_MAX

  pipemax = PIPE_MAX;

#else

  pipemax = fpathconf (pip[1], _PC_PIPE_BUF);

#endif

  if (pipemax <= 0)

    {

      fprintf (stderr, "Bad pipemax %d\n", pipemax);

      abort ();

    }

  /* Writing an inordinate amount to the pipe.  */

  buf = calloc (100 * pipemax, 1);

  if (buf == NULL)

    err ("calloc");

  /* The following doesn't trig on host; writing more than PIPE_MAX to a

     pipe with no reader makes the program hang.  Neither does it trig

     on target: we don't want to emulate the "hanging" (which would

     happen with *any* amount written to a pipe with no reader if we'd

     support it - but we don't).  Better to abort the simulation with a

     suitable message.  */

  if (write (pip[1], buf, 100 * pipemax) != -1

      || errno != EFBIG)

    err ("write mucho");

  printf ("pass\n");

  exit (0);

}