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/* Check for a sim bug, whereby an invalid seek (to a negative offset)
did not return an error. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
int
main (void)
{
FILE *f;
const char fname[] = "sk1test.dat";
const char tsttxt[]
= "A random line of text, used to test correct read, write and seek.\n";
char buf[sizeof tsttxt] = "";
int fd;
f = fopen (fname, "wb");
if (f == NULL
|| fwrite (tsttxt, 1, strlen (tsttxt), f) != strlen (tsttxt)
|| fclose (f) != 0)
{
printf ("fail\n");
exit (1);
}
fd = open (fname, O_RDONLY);
if (fd < 0
|| lseek (fd, -1L, SEEK_CUR) != -1
|| errno != EINVAL
|| read (fd, buf, strlen (tsttxt)) != strlen (tsttxt)
|| strcmp (buf, tsttxt) != 0)
{
printf ("fail\n");
exit (1);
}
printf ("pass\n");
exit (0);
}
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