glibc/dirent/tst-seekdir.c

43 lines
779 B
C

#include <stdio.h>
#include <dirent.h>
#include <stdlib.h>
int
main (int argc, char *argv[])
{
DIR * dirp;
long int save3 = 0;
int i = 0;
struct dirent *dp;
dirp = opendir(".");
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);
/* print remaining files (3-last) */
for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp))
printf("%s\n", dp->d_name);
closedir (dirp);
exit(0);
}