1: /* Test assert_perror().
    2:  *
    3:  * This is hairier than you'd think, involving games with
    4:  * stdio and signals.
    5:  *
    6:  */
    7: 
    8: #include <signal.h>
    9: #include <stdlib.h>
   10: #include <stdio.h>
   11: #include <string.h>
   12: #include <setjmp.h>
   13: 
   14: jmp_buf rec;
   15: char buf[160];
   16: 
   17: static void
   18: sigabrt (int unused)
   19: {
   20:   longjmp (rec, 1);  /* recover control */
   21: }
   22: 
   23: #undef NDEBUG
   24: #include <assert.h>
   25: static void
   26: assert1 (void)
   27: {
   28:   assert_perror (1);
   29: }
   30: 
   31: static void
   32: assert2 (void)
   33: {
   34:   assert_perror (0);
   35: }
   36: 
   37: #define NDEBUG
   38: #include <assert.h>
   39: static void
   40: assert3 (void)
   41: {
   42:   assert_perror (2);
   43: }
   44: 
   45: int
   46: main(void)
   47: {
   48:   volatile int failed = 1;  /* safety in presence of longjmp() */
   49: 
   50:   fclose (stderr);
   51:   stderr = tmpfile ();
   52:   if (!stderr)
   53:     abort ();
   54: 
   55:   signal (SIGABRT, sigabrt);
   56: 
   57:   if (!setjmp (rec))
   58:     assert1 ();
   59:   else
   60:     failed = 0;  /* should happen */
   61: 
   62:   if (!setjmp (rec))
   63:     assert2 ();
   64:   else
   65:     failed = 1; /* should not happen */
   66: 
   67:   if (!setjmp (rec))
   68:     assert3 ();
   69:   else
   70:     failed = 1; /* should not happen */
   71: 
   72:   rewind (stderr);
   73:   fgets (buf, 160, stderr);
   74:   if (!strstr(buf, strerror (1)))
   75:     failed = 1;
   76: 
   77:   fgets (buf, 160, stderr);
   78:   if (strstr (buf, strerror (0)))
   79:     failed = 1;
   80: 
   81:   fgets (buf, 160, stderr);
   82:   if (strstr (buf, strerror (2)))
   83:     failed = 1;
   84: 
   85:   return failed;
   86: }