mirror of
https://github.com/samba-team/samba.git
synced 2025-06-25 19:17:10 +03:00
f92c000fc9
are broken (apparently all BSD systems). This breakage leads to unlink on files in an open directory causing a later seekdir to miss files. The bug happens due to a block boundary bug in the BSD libc implementation of these calls. This replacement code also fixes a severe memory usage problem with telldir that can cause closedir() to take an arbitrary amount of time. I have reported the bug in readdir to Greg Lehey (a FreeBSD maintainer) (This used to be commit e1bf7c4279fbc03a52497d24cea375e75059cba1)
111 lines
2.0 KiB
C
111 lines
2.0 KiB
C
/*
|
|
test readdir/unlink pattern that OS/2 uses
|
|
tridge@samba.org July 2005
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <sys/stat.h>
|
|
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
#include <dirent.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#include <fcntl.h>
|
|
#ifdef REPLACE_READDIR
|
|
#include "lib/replace/repdir/repdir.h"
|
|
#endif
|
|
|
|
#define NUM_FILES 700
|
|
#define READDIR_SIZE 100
|
|
#define DELETE_SIZE 4
|
|
|
|
#define TESTDIR "test.dir"
|
|
|
|
#define FAILED() (fprintf(stderr, "Failed at %s:%d - %s\n", __FUNCTION__, __LINE__, strerror(errno)), exit(1), 1)
|
|
|
|
#ifndef MIN
|
|
#define MIN(a,b) ((a)<(b)?(a):(b))
|
|
#endif
|
|
|
|
static void cleanup(void)
|
|
{
|
|
/* I'm a lazy bastard */
|
|
system("rm -rf " TESTDIR);
|
|
mkdir(TESTDIR, 0700) == 0 || FAILED();
|
|
}
|
|
|
|
static void create_files()
|
|
{
|
|
int i;
|
|
for (i=0;i<NUM_FILES;i++) {
|
|
char fname[40];
|
|
sprintf(fname, TESTDIR "/test%u.txt", i);
|
|
close(open(fname, O_CREAT|O_RDWR, 0600)) == 0 || FAILED();
|
|
}
|
|
}
|
|
|
|
static int os2_delete(DIR *d)
|
|
{
|
|
off_t offsets[READDIR_SIZE];
|
|
int i, j;
|
|
struct dirent *de;
|
|
char names[READDIR_SIZE][30];
|
|
|
|
/* scan, remembering offsets */
|
|
for (i=0, de=readdir(d);
|
|
de && i < READDIR_SIZE;
|
|
de=readdir(d), i++) {
|
|
offsets[i] = telldir(d);
|
|
strcpy(names[i], de->d_name);
|
|
}
|
|
|
|
if (i == 0) {
|
|
return 0;
|
|
}
|
|
|
|
/* delete the first few */
|
|
for (j=0; j<MIN(i, DELETE_SIZE); j++) {
|
|
char fname[40];
|
|
sprintf(fname, TESTDIR "/%s", names[j]);
|
|
unlink(fname) == 0 || FAILED();
|
|
}
|
|
|
|
/* seek to just after the deletion */
|
|
seekdir(d, offsets[j-1]);
|
|
|
|
/* return number deleted */
|
|
return j;
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
int total_deleted = 0;
|
|
DIR *d;
|
|
struct dirent *de;
|
|
|
|
cleanup();
|
|
create_files();
|
|
|
|
d = opendir(TESTDIR);
|
|
|
|
/* skip past . and .. */
|
|
de = readdir(d);
|
|
strcmp(de->d_name, ".") == 0 || FAILED();
|
|
de = readdir(d);
|
|
strcmp(de->d_name, "..") == 0 || FAILED();
|
|
|
|
while (1) {
|
|
int n = os2_delete(d);
|
|
if (n == 0) break;
|
|
total_deleted += n;
|
|
}
|
|
closedir(d);
|
|
|
|
printf("Deleted %d files of %d\n", total_deleted, NUM_FILES);
|
|
|
|
rmdir(TESTDIR) == 0 || FAILED();
|
|
|
|
return 0;
|
|
}
|