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glibc/dirent/tst-seekdir.c
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#include <stdio.h> | |
#include <dirent.h> | |
#include <stdlib.h> | |
static int | |
do_test (void) | |
{ | |
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; | |
} | |
#define TEST_FUNCTION do_test () | |
#include "../test-skeleton.c" |