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#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <dirent.h>
#include <stdlib.h>
int
main (int argc, char *argv[])
{
DIR * dirp;
long int save3 = 0;
long int cur;
int i = 0;
int result = 0;
struct dirent *dp;
off_t save0, rewind_ret;
dirp = opendir (".");
if (dirp == NULL)
{
printf ("opendir failed: %s\n", strerror(errno));
return 1;
}
save0 = telldir (dirp);
if (save0 == -1)
{
printf ("telldir failed: %s\n", strerror(errno));
result = 1;
}
for (dp = readdir (dirp); dp != NULL; dp = readdir (dirp))
{
/* save position 3 (after fourth entry) */
if (i++ == 3)
save3 = telldir (dirp);
printf ("%s\n", dp->d_name);
/* stop at 400 (just to make sure dirp->__offset and dirp->__size are
scrambled */
if (i == 400)
break;
}
printf ("going back past 4-th entry...\n");
/* go back to saved entry */
seekdir (dirp, save3);
/* Check whether telldir equals to save3 now. */
cur = telldir (dirp);
if (cur != save3)
{
printf ("seekdir (d, %ld); telldir (d) == %ld\n", save3, cur);
result = 1;
}
/* print remaining files (3-last) */
for (dp = readdir (dirp); dp != NULL; dp = readdir (dirp))
printf ("%s\n", dp->d_name);
/* Check rewinddir */
rewinddir (dirp);
rewind_ret = telldir (dirp);
if (rewind_ret == -1)
{
printf ("telldir failed: %s\n", strerror(errno));
result = 1;
}
else if (save0 != rewind_ret)
{
printf ("rewinddir didn't reset directory stream\n");
result = 1;
}
closedir (dirp);
return result;
}
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