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/* Check that TRT happens for pipe corner cases (for our definition of TRT).
#progos: linux
#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);
}
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