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Date: Wed, 12 Feb 2014 18:18:52 +0100
From: Miklos Szeredi <miklos@...redi.hu>
To: Dave Chinner <david@...morbit.com>
Cc: viro@...IV.linux.org.uk, torvalds@...ux-foundation.org,
linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
bfields@...ldses.org, hch@...radead.org, akpm@...ux-foundation.org,
dhowells@...hat.com, zab@...hat.com, jack@...e.cz,
luto@...capital.net, mszeredi@...e.cz
Subject: Re: [PATCH 00/13] cross rename v4
On Tue, Feb 11, 2014 at 05:01:41PM +0100, Miklos Szeredi wrote:
> On Mon, Feb 10, 2014 at 09:51:45PM +1100, Dave Chinner wrote:
> > Miklos, can you please write an xfstest for this new API? That way
> > we can verify that the behaviour is as documented, and we can ensure
> > that when we implement it on other filesystems it works exactly the
> > same on all filesystems?
This is a standalone testprog, but I guess it's trivial to integrate into
xfstests.
Please let me know what you think.
Thanks,
Miklos
----
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <dirent.h>
#include <utime.h>
#include <errno.h>
#include <assert.h>
#include <sys/types.h>
#include <sys/stat.h>
static char testfile[1024];
static char testfile2[1024];
static char testdir[1024];
static char testdir2[1024];
static char testname[256];
static char testdata[] = "abcdefghijklmnopqrstuvwxyz";
static char testdata2[] = "1234567890-=qwertyuiop[]\asdfghjkl;'zxcvbnm,./";
static const char *testdir_files[] = { "f1", "f2", NULL};
static const char *testdir_files2[] = { "f3", "f4", "f5", NULL};
static const char *testdir_empty[] = { NULL};
static int testdatalen = sizeof(testdata) - 1;
static int testdata2len = sizeof(testdata2) - 1;
static unsigned int testnum = 1;
static unsigned int select_test = 0;
static unsigned int skip_test = 0;
#define swap(a, b) \
do { typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while (0)
#define MAX_ENTRIES 1024
static void test_perror(const char *func, const char *msg)
{
printf("%s %s() - %s: %s\n", testname, func, msg,
strerror(errno));
}
static void test_error(const char *func, const char *msg, ...)
__attribute__ ((format (printf, 2, 3)));
static void __start_test(const char *fmt, ...)
__attribute__ ((format (printf, 1, 2)));
static void test_error(const char *func, const char *msg, ...)
{
va_list ap;
printf("%s %s() - ", testname, func);
va_start(ap, msg);
vfprintf(stdout, msg, ap);
va_end(ap);
fprintf(stdout, "\n");
}
static void success(void)
{
printf("%s OK\n", testname);
}
static void __start_test(const char *fmt, ...)
{
unsigned int n;
va_list ap;
n = sprintf(testname, "%3i [", testnum++);
va_start(ap, fmt);
n += vsprintf(testname + n, fmt, ap);
va_end(ap);
sprintf(testname + n, "]");
}
#define start_test(msg, args...) { \
if ((select_test && testnum != select_test) || \
(testnum == skip_test)) { \
testnum++; \
return 0; \
} \
__start_test(msg, ##args); \
}
#define PERROR(msg) test_perror(__FUNCTION__, msg)
#define ERROR(msg, args...) test_error(__FUNCTION__, msg, ##args)
static int check_size(const char *path, int len)
{
struct stat stbuf;
int res = stat(path, &stbuf);
if (res == -1) {
PERROR("stat");
return -1;
}
if (stbuf.st_size != len) {
ERROR("length %u instead of %u", (int) stbuf.st_size,
(int) len);
return -1;
}
return 0;
}
static int check_type(const char *path, mode_t type)
{
struct stat stbuf;
int res = lstat(path, &stbuf);
if (res == -1) {
PERROR("lstat");
return -1;
}
if ((stbuf.st_mode & S_IFMT) != type) {
ERROR("type 0%o instead of 0%o", stbuf.st_mode & S_IFMT, type);
return -1;
}
return 0;
}
static int check_mode(const char *path, mode_t mode)
{
struct stat stbuf;
int res = lstat(path, &stbuf);
if (res == -1) {
PERROR("lstat");
return -1;
}
if ((stbuf.st_mode & 07777) != mode) {
ERROR("mode 0%o instead of 0%o", stbuf.st_mode & 07777, mode);
return -1;
}
return 0;
}
static int check_nlink(const char *path, nlink_t nlink)
{
struct stat stbuf;
int res = lstat(path, &stbuf);
if (res == -1) {
PERROR("lstat");
return -1;
}
if (stbuf.st_nlink != nlink) {
ERROR("nlink %li instead of %li", (long) stbuf.st_nlink,
(long) nlink);
return -1;
}
return 0;
}
static int check_nonexist(const char *path)
{
struct stat stbuf;
int res = lstat(path, &stbuf);
if (res == 0) {
ERROR("file should not exist");
return -1;
}
if (errno != ENOENT) {
ERROR("file should not exist: %s", strerror(errno));
return -1;
}
return 0;
}
static int check_buffer(const char *buf, const char *data, unsigned len)
{
if (memcmp(buf, data, len) != 0) {
ERROR("data mismatch");
return -1;
}
return 0;
}
static int check_data(const char *path, const char *data, int offset,
unsigned len)
{
char buf[4096];
int res;
int fd = open(path, O_RDONLY);
if (fd == -1) {
PERROR("open");
return -1;
}
if (lseek(fd, offset, SEEK_SET) == (off_t) -1) {
PERROR("lseek");
close(fd);
return -1;
}
while (len) {
int rdlen = len < sizeof(buf) ? len : sizeof(buf);
res = read(fd, buf, rdlen);
if (res == -1) {
PERROR("read");
close(fd);
return -1;
}
if (res != rdlen) {
ERROR("short read: %u instead of %u", res, rdlen);
close(fd);
return -1;
}
if (check_buffer(buf, data, rdlen) != 0) {
close(fd);
return -1;
}
data += rdlen;
len -= rdlen;
}
res = close(fd);
if (res == -1) {
PERROR("close");
return -1;
}
return 0;
}
static int check_dir_contents(const char *path, const char **contents)
{
int i;
int res;
int err = 0;
int found[MAX_ENTRIES];
const char *cont[MAX_ENTRIES];
DIR *dp;
for (i = 0; contents[i]; i++) {
assert(i < MAX_ENTRIES - 3);
found[i] = 0;
cont[i] = contents[i];
}
found[i] = 0;
cont[i++] = ".";
found[i] = 0;
cont[i++] = "..";
cont[i] = NULL;
dp = opendir(path);
if (dp == NULL) {
PERROR("opendir");
return -1;
}
memset(found, 0, sizeof(found));
while(1) {
struct dirent *de;
errno = 0;
de = readdir(dp);
if (de == NULL) {
if (errno) {
PERROR("readdir");
closedir(dp);
return -1;
}
break;
}
for (i = 0; cont[i] != NULL; i++) {
assert(i < MAX_ENTRIES);
if (strcmp(cont[i], de->d_name) == 0) {
if (found[i]) {
ERROR("duplicate entry <%s>",
de->d_name);
err--;
} else
found[i] = 1;
break;
}
}
if (!cont[i]) {
ERROR("unexpected entry <%s>", de->d_name);
err --;
}
}
for (i = 0; cont[i] != NULL; i++) {
if (!found[i]) {
ERROR("missing entry <%s>", cont[i]);
err--;
}
}
res = closedir(dp);
if (res == -1) {
PERROR("closedir");
return -1;
}
if (err)
return -1;
return 0;
}
static int create_file(const char *path, const char *data, int len)
{
int res;
int fd;
unlink(path);
fd = open(path, O_CREAT | O_WRONLY | O_TRUNC | O_EXCL, 0644);
if (fd == -1) {
PERROR("creat");
return -1;
}
if (len) {
res = write(fd, data, len);
if (res == -1) {
PERROR("write");
close(fd);
return -1;
}
if (res != len) {
ERROR("write is short: %u instead of %u", res, len);
close(fd);
return -1;
}
}
res = close(fd);
if (res == -1) {
PERROR("close");
return -1;
}
res = check_type(path, S_IFREG);
if (res == -1)
return -1;
res = check_mode(path, 0644);
if (res == -1)
return -1;
res = check_nlink(path, 1);
if (res == -1)
return -1;
res = check_size(path, len);
if (res == -1)
return -1;
if (len) {
res = check_data(path, data, 0, len);
if (res == -1)
return -1;
}
return 0;
}
static int cleanup_dir(const char *path, const char **dir_files, int quiet)
{
int i;
int err = 0;
for (i = 0; dir_files[i]; i++) {
int res;
char fpath[1024];
sprintf(fpath, "%s/%s", path, dir_files[i]);
res = unlink(fpath);
if (res == -1 && !quiet) {
PERROR("unlink");
err --;
}
}
if (err)
return -1;
return 0;
}
static int create_dir(const char *path, const char **dir_files)
{
int res;
int i;
rmdir(path);
res = mkdir(path, 0755);
if (res == -1) {
PERROR("mkdir");
return -1;
}
res = check_type(path, S_IFDIR);
if (res == -1)
return -1;
res = check_mode(path, 0755);
if (res == -1)
return -1;
for (i = 0; dir_files[i]; i++) {
char fpath[1024];
sprintf(fpath, "%s/%s", path, dir_files[i]);
res = create_file(fpath, "", 0);
if (res == -1) {
cleanup_dir(path, dir_files, 1);
return -1;
}
}
res = check_dir_contents(path, dir_files);
if (res == -1) {
cleanup_dir(path, dir_files, 1);
return -1;
}
return 0;
}
static void cleanup_one(const char *path)
{
int res;
res = unlink(path);
if (res == -1 && errno != ENOENT) {
res = rmdir(path);
if (res == -1) {
DIR *dp = opendir(path);
if (dp != NULL) {
int fd = dirfd(dp);
while (1) {
struct dirent *de = readdir(dp);
if (de == NULL)
break;
res = unlinkat(fd, de->d_name, 0);
if (res == -1) {
unlinkat(fd, de->d_name,
AT_REMOVEDIR);
}
}
closedir(dp);
rmdir(path);
}
}
}
}
static void cleanup(void)
{
cleanup_one(testfile);
cleanup_one(testfile2);
cleanup_one(testdir);
cleanup_one(testdir2);
}
#define SYS_renameat2 316
#define RENAME_NOREPLACE (1 << 0) /* Don't overwrite target */
#define RENAME_EXCHANGE (1 << 1) /* Exchange source and dest */
static int sys_renameat2(int dfd1, const char *path1,
int dfd2, const char *path2,
unsigned int flags)
{
return syscall(SYS_renameat2, dfd1, path1, dfd2, path2, flags);
}
static const char *type_name(int type, int empty)
{
switch (type) {
case S_IFREG:
return "REG ";
case S_IFLNK:
return "LNK ";
case S_IFDIR:
if (empty)
return "DIR-";
else
return "DIR+";
case 0:
return "- ";
default:
return "????";
}
}
static int check_any(const char *path, int type, void *data, int data_len)
{
int res;
char buf[1024];
if (type) {
res = check_type(path, type);
if (res == -1)
return -1;
}
switch (type) {
case S_IFDIR:
res = check_mode(path, 0755);
if (res == -1)
return -1;
res = check_dir_contents(path, data);
if (res == -1)
return -1;
res = cleanup_dir(path, data, 0);
if (res == -1)
return -1;
res = rmdir(path);
if (res == -1)
return -1;
break;
case S_IFREG:
res = check_mode(path, 0644);
if (res == -1)
return -1;
res = check_nlink(path, 1);
if (res == -1)
return -1;
res = check_size(path, data_len);
if (res == -1)
return -1;
res = check_data(path, data, 0, data_len);
if (res == -1)
return -1;
res = unlink(path);
if (res == -1) {
PERROR("unlink");
return -1;
}
break;
case S_IFLNK:
res = check_mode(path, 0777);
if (res == -1)
return -1;
res = readlink(path, buf, sizeof(buf));
if (res == -1) {
PERROR("readlink");
return -1;
}
if (res != data_len) {
ERROR("short readlink: %u instead of %u", res,
data_len);
return -1;
}
if (memcmp(buf, data, data_len) != 0) {
ERROR("link mismatch");
return -1;
}
res = unlink(path);
if (res == -1) {
PERROR("unlink");
return -1;
}
break;
}
res = check_nonexist(path);
if (res == -1)
return -1;
return 0;
}
static int create_any(const char *path, int type, void *data, int data_len)
{
int res;
switch (type) {
case S_IFREG:
res = create_file(path, data, data_len);
break;
case S_IFLNK:
res = symlink(data, path);
if (res == -1)
PERROR("symlink");
break;
case S_IFDIR:
res = create_dir(path, data);
break;
case 0:
res = check_nonexist(path);
break;
}
return res;
}
static const char *rename_flag_name(unsigned int flags)
{
switch (flags) {
case 0:
return "(none)";
case RENAME_NOREPLACE:
return "(NOREPLACE)";
case RENAME_EXCHANGE:
return "(EXCHANGE)";
case RENAME_NOREPLACE | RENAME_EXCHANGE:
return "(NOREPLACE | EXCHANGE)";
default:
return "????";
}
}
static int test_rename(unsigned int flags, int src_type, int src_empty,
int dst_type, int dst_empty, int err)
{
int res;
const char *src = NULL;
const char *dst = NULL;
void *src_data = NULL;
void *dst_data = NULL;
int src_datalen = 0;
int dst_datalen = 0;
start_test("rename %-11s %s -> %s error: '%s'",
rename_flag_name(flags),
type_name(src_type, src_empty),
type_name(dst_type, dst_empty),
strerror(err));
res = 0;
if (src_type == S_IFDIR) {
src_data = src_empty ? testdir_empty : testdir_files;
src = testdir;
} else {
src = testfile;
src_data = testdata;
src_datalen = testdatalen;
}
if (dst_type == S_IFDIR) {
dst = testdir2;
dst_data = dst_empty ? testdir_empty : testdir_files2;
} else {
dst = testfile2;
dst_data = testdata2;
dst_datalen = testdata2len;
}
res = create_any(src, src_type, src_data, src_datalen);
if (res == -1)
goto cleanup;
res = create_any(dst, dst_type, dst_data, dst_datalen);
if (res == -1)
goto cleanup;
res = sys_renameat2(AT_FDCWD, src, AT_FDCWD, dst, flags);
if (res == 0) {
if (err) {
ERROR("renameat2 should have failed");
res = -1;
goto cleanup;
}
if (!(flags & RENAME_EXCHANGE)) {
dst_type = src_type;
dst_data = src_data;
dst_datalen = src_datalen;
src_type = 0;
src_data = NULL;
src_datalen = 0;
} else {
swap(src_type, dst_type);
swap(src_data, dst_data);
swap(dst_datalen, src_datalen);
}
} else {
if (errno == ENOSYS || errno == EINVAL) {
success(); /* not supported, most likely */
res = 0;
goto cleanup;
}
if (err != errno) {
PERROR("wrong errno");
res = -1;
goto cleanup;
}
}
res = check_any(src, src_type, src_data, src_datalen);
if (res == -1)
goto cleanup;
res = check_any(dst, dst_type, dst_data, dst_datalen);
if (res == -1)
goto cleanup;
success();
return 0;
cleanup:
cleanup();
return res;
}
static int test_renames(void)
{
int err = 0;
err += test_rename(0, 0, 0, S_IFREG, 0, ENOENT);
err += test_rename(0, 0, 0, S_IFLNK, 0, ENOENT);
err += test_rename(0, 0, 0, S_IFDIR, 0, ENOENT);
err += test_rename(0, 0, 0, S_IFDIR, 1, ENOENT);
err += test_rename(0, 0, 0, 0, 0, ENOENT);
err += test_rename(0, S_IFREG, 0, S_IFREG, 0, 0);
err += test_rename(0, S_IFREG, 0, S_IFLNK, 0, 0);
err += test_rename(0, S_IFREG, 0, S_IFDIR, 0, EISDIR);
err += test_rename(0, S_IFREG, 0, S_IFDIR, 1, EISDIR);
err += test_rename(0, S_IFREG, 0, 0, 0, 0);
err += test_rename(0, S_IFLNK, 0, S_IFREG, 0, 0);
err += test_rename(0, S_IFLNK, 0, S_IFLNK, 0, 0);
err += test_rename(0, S_IFLNK, 0, S_IFDIR, 0, EISDIR);
err += test_rename(0, S_IFLNK, 0, S_IFDIR, 1, EISDIR);
err += test_rename(0, S_IFLNK, 0, 0, 0, 0);
err += test_rename(0, S_IFDIR, 0, S_IFREG, 0, ENOTDIR);
err += test_rename(0, S_IFDIR, 0, S_IFLNK, 0, ENOTDIR);
err += test_rename(0, S_IFDIR, 0, S_IFDIR, 0, ENOTEMPTY);
err += test_rename(0, S_IFDIR, 0, S_IFDIR, 1, 0);
err += test_rename(0, S_IFDIR, 0, 0, 0, 0);
err += test_rename(0, S_IFDIR, 1, S_IFREG, 0, ENOTDIR);
err += test_rename(0, S_IFDIR, 1, S_IFLNK, 0, ENOTDIR);
err += test_rename(0, S_IFDIR, 1, S_IFDIR, 0, ENOTEMPTY);
err += test_rename(0, S_IFDIR, 1, S_IFDIR, 1, 0);
err += test_rename(0, S_IFDIR, 1, 0, 0, 0);
err += test_rename(RENAME_NOREPLACE, 0, 0, S_IFREG, 0, ENOENT);
err += test_rename(RENAME_NOREPLACE, 0, 0, S_IFLNK, 0, ENOENT);
err += test_rename(RENAME_NOREPLACE, 0, 0, S_IFDIR, 0, ENOENT);
err += test_rename(RENAME_NOREPLACE, 0, 0, S_IFDIR, 1, ENOENT);
err += test_rename(RENAME_NOREPLACE, 0, 0, 0, 0, ENOENT);
err += test_rename(RENAME_NOREPLACE, S_IFREG, 0, S_IFREG, 0, EEXIST);
err += test_rename(RENAME_NOREPLACE, S_IFREG, 0, S_IFLNK, 0, EEXIST);
err += test_rename(RENAME_NOREPLACE, S_IFREG, 0, S_IFDIR, 0, EEXIST);
err += test_rename(RENAME_NOREPLACE, S_IFREG, 0, S_IFDIR, 1, EEXIST);
err += test_rename(RENAME_NOREPLACE, S_IFREG, 0, 0, 0, 0);
err += test_rename(RENAME_NOREPLACE, S_IFLNK, 0, S_IFREG, 0, EEXIST);
err += test_rename(RENAME_NOREPLACE, S_IFLNK, 0, S_IFLNK, 0, EEXIST);
err += test_rename(RENAME_NOREPLACE, S_IFLNK, 0, S_IFDIR, 0, EEXIST);
err += test_rename(RENAME_NOREPLACE, S_IFLNK, 0, S_IFDIR, 1, EEXIST);
err += test_rename(RENAME_NOREPLACE, S_IFLNK, 0, 0, 0, 0);
err += test_rename(RENAME_NOREPLACE, S_IFDIR, 0, S_IFREG, 0, EEXIST);
err += test_rename(RENAME_NOREPLACE, S_IFDIR, 0, S_IFLNK, 0, EEXIST);
err += test_rename(RENAME_NOREPLACE, S_IFDIR, 0, S_IFDIR, 0, EEXIST);
err += test_rename(RENAME_NOREPLACE, S_IFDIR, 0, S_IFDIR, 1, EEXIST);
err += test_rename(RENAME_NOREPLACE, S_IFDIR, 0, 0, 0, 0);
err += test_rename(RENAME_NOREPLACE, S_IFDIR, 1, S_IFREG, 0, EEXIST);
err += test_rename(RENAME_NOREPLACE, S_IFDIR, 1, S_IFLNK, 0, EEXIST);
err += test_rename(RENAME_NOREPLACE, S_IFDIR, 1, S_IFDIR, 0, EEXIST);
err += test_rename(RENAME_NOREPLACE, S_IFDIR, 1, S_IFDIR, 1, EEXIST);
err += test_rename(RENAME_NOREPLACE, S_IFDIR, 1, 0, 0, 0);
err += test_rename(RENAME_EXCHANGE, 0, 0, S_IFREG, 0, ENOENT);
err += test_rename(RENAME_EXCHANGE, 0, 0, S_IFLNK, 0, ENOENT);
err += test_rename(RENAME_EXCHANGE, 0, 0, S_IFDIR, 0, ENOENT);
err += test_rename(RENAME_EXCHANGE, 0, 0, S_IFDIR, 1, ENOENT);
err += test_rename(RENAME_EXCHANGE, 0, 0, 0, 0, ENOENT);
err += test_rename(RENAME_EXCHANGE, S_IFREG, 0, S_IFREG, 0, 0);
err += test_rename(RENAME_EXCHANGE, S_IFREG, 0, S_IFLNK, 0, 0);
err += test_rename(RENAME_EXCHANGE, S_IFREG, 0, S_IFDIR, 0, 0);
err += test_rename(RENAME_EXCHANGE, S_IFREG, 0, S_IFDIR, 1, 0);
err += test_rename(RENAME_EXCHANGE, S_IFREG, 0, 0, 0, ENOENT);
err += test_rename(RENAME_EXCHANGE, S_IFLNK, 0, S_IFREG, 0, 0);
err += test_rename(RENAME_EXCHANGE, S_IFLNK, 0, S_IFLNK, 0, 0);
err += test_rename(RENAME_EXCHANGE, S_IFLNK, 0, S_IFDIR, 0, 0);
err += test_rename(RENAME_EXCHANGE, S_IFLNK, 0, S_IFDIR, 1, 0);
err += test_rename(RENAME_EXCHANGE, S_IFLNK, 0, 0, 0, ENOENT);
err += test_rename(RENAME_EXCHANGE, S_IFDIR, 0, S_IFREG, 0, 0);
err += test_rename(RENAME_EXCHANGE, S_IFDIR, 0, S_IFLNK, 0, 0);
err += test_rename(RENAME_EXCHANGE, S_IFDIR, 0, S_IFDIR, 0, 0);
err += test_rename(RENAME_EXCHANGE, S_IFDIR, 0, S_IFDIR, 1, 0);
err += test_rename(RENAME_EXCHANGE, S_IFDIR, 0, 0, 0, ENOENT);
err += test_rename(RENAME_EXCHANGE, S_IFDIR, 1, S_IFREG, 0, 0);
err += test_rename(RENAME_EXCHANGE, S_IFDIR, 1, S_IFLNK, 0, 0);
err += test_rename(RENAME_EXCHANGE, S_IFDIR, 1, S_IFDIR, 0, 0);
err += test_rename(RENAME_EXCHANGE, S_IFDIR, 1, S_IFDIR, 1, 0);
err += test_rename(RENAME_EXCHANGE, S_IFDIR, 1, 0, 0, ENOENT);
err += test_rename(RENAME_NOREPLACE | RENAME_EXCHANGE,
S_IFREG, 0, S_IFREG, 0, EINVAL);
return err;
}
int main(int argc, char *argv[])
{
const char *basepath;
int err = 0;
int res;
umask(0);
if (argc != 2) {
fprintf(stderr, "usage: %s testdir\n", argv[0]);
return 1;
}
basepath = argv[1];
assert(strlen(basepath) < 512);
if (basepath[0] != '/') {
fprintf(stderr, "testdir must be an absolute path\n");
return 1;
}
sprintf(testfile, "%s/testfile", basepath);
sprintf(testfile2, "%s/testfile2", basepath);
sprintf(testdir, "%s/testdir", basepath);
sprintf(testdir2, "%s/testdir2", basepath);
if (check_nonexist(testfile) == -1 ||
check_nonexist(testfile2) == -1 ||
check_nonexist(testdir) == -1 ||
check_nonexist(testdir2) == -1)
return 1;
err += test_renames();
res = mkdir(testdir, 0755);
if (res == -1) {
perror(testdir);
return 1;
}
res = mkdir(testdir2, 0755);
if (res == -1) {
perror(testdir2);
return 1;
}
printf("------- Doing cross-directory renames...\n");
sprintf(testfile, "%s/testdir/subfile", basepath);
sprintf(testdir, "%s/testdir/subdir", basepath);
sprintf(testfile2, "%s/testdir2/subfile2", basepath);
sprintf(testdir2, "%s/testdir2/subdir2", basepath);
err += test_renames();
sprintf(testdir, "%s/testdir", basepath);
sprintf(testdir2, "%s/testdir2", basepath);
cleanup();
if (err) {
fprintf(stderr, "%i tests failed\n", -err);
return 1;
}
return 0;
}
--
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