sim/testsuite/cris/c/seek4.c

   1 /* Check for a sim bug, whereby an invalid seek (to a negative offset)
   2    did not return an error.  */
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <errno.h>
   7 #include <sys/types.h>
   8 #include <sys/stat.h>
   9 #include <fcntl.h>
  10 #include <unistd.h>
  11
  12 int
  13 main (void)
  14 {
  15   FILE *f;
  16   const char fname[] = "sk1test.dat";
  17   const char tsttxt[]
  18     = "A random line of text, used to test correct read, write and seek.\n";
  19   char buf[sizeof tsttxt] = "";
  20   int fd;
  21
  22   f = fopen (fname, "wb");
  23   if (f == NULL
  24       || fwrite (tsttxt, 1, strlen (tsttxt), f) != strlen (tsttxt)
  25       || fclose (f) != 0)
  26     {
  27       printf ("fail\n");
  28       exit (1);
  29     }
  30
  31   fd = open (fname, O_RDONLY);
  32   if (fd < 0
  33       || lseek (fd, -1L, SEEK_CUR) != -1
  34       || errno != EINVAL
  35       || read (fd, buf, strlen (tsttxt)) != strlen (tsttxt)
  36       || strcmp (buf, tsttxt) != 0)
  37     {
  38       printf ("fail\n");
  39       exit (1);
  40     }
  41
  42   printf ("pass\n");
  43   exit (0);
  44 }