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      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 }
     45