79 lines
1.5 KiB
C
79 lines
1.5 KiB
C
#include <stdio.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;
|
|
long int save0;
|
|
long int rewind;
|
|
|
|
dirp = opendir (".");
|
|
if (dirp == NULL)
|
|
{
|
|
printf ("opendir failed: %m\n");
|
|
return 1;
|
|
}
|
|
|
|
save0 = telldir (dirp);
|
|
if (save0 == -1)
|
|
{
|
|
printf ("telldir failed: %m\n");
|
|
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 = telldir (dirp);
|
|
if (rewind == -1)
|
|
{
|
|
printf ("telldir failed: %m\n");
|
|
result = 1;
|
|
}
|
|
else if (save0 != rewind)
|
|
{
|
|
printf ("rewinddir didn't reset directory stream\n");
|
|
result = 1;
|
|
}
|
|
|
|
closedir (dirp);
|
|
return result;
|
|
}
|