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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <ftw.h>
#include "fd-util.h"
#include "log.h"
#include "missing_magic.h"
#include "recurse-dir.h"
#include "strv.h"
#include "tests.h"
static char **list_nftw = NULL;
static int nftw_cb(
const char *fpath,
const struct stat *sb,
int typeflag,
struct FTW *ftwbuf) {
if (ftwbuf->level == 0) /* skip top-level */
return FTW_CONTINUE;
switch (typeflag) {
case FTW_F:
log_debug("ftw found %s", fpath);
assert_se(strv_extend(&list_nftw, fpath) >= 0);
break;
case FTW_SL:
log_debug("ftw found symlink %s, ignoring.", fpath);
break;
case FTW_D:
log_debug("ftw entering %s", fpath);
assert_se(strv_extendf(&list_nftw, "%s/", fpath) >= 0);
break;
case FTW_DNR:
log_debug("ftw open directory failed %s", fpath);
break;
case FTW_NS:
log_debug("ftw stat inode failed %s", fpath);
break;
case FTW_DP:
case FTW_SLN:
default:
assert_not_reached();
}
return FTW_CONTINUE;
}
static int recurse_dir_callback(
RecurseDirEvent event,
const char *path,
int dir_fd,
int inode_fd,
const struct dirent *de,
const struct statx *sx,
void *userdata) {
char ***l = userdata;
assert_se(path);
assert_se(de);
switch (event) {
case RECURSE_DIR_ENTRY:
assert_se(!IN_SET(de->d_type, DT_UNKNOWN, DT_DIR));
log_debug("found %s%s", path,
de->d_type == DT_LNK ? ", ignoring." : "");
if (de->d_type != DT_LNK)
assert_se(strv_extend(l, path) >= 0);
break;
case RECURSE_DIR_ENTER:
assert_se(de->d_type == DT_DIR);
log_debug("entering %s", path);
assert_se(strv_extendf(l, "%s/", path) >= 0);
break;
case RECURSE_DIR_LEAVE:
log_debug("leaving %s", path);
break;
case RECURSE_DIR_SKIP_MOUNT:
log_debug("skipping mount %s", path);
break;
case RECURSE_DIR_SKIP_DEPTH:
log_debug("skipping depth %s", path);
break;
case RECURSE_DIR_SKIP_OPEN_DIR_ERROR_BASE...RECURSE_DIR_SKIP_OPEN_DIR_ERROR_MAX:
log_debug_errno(event - RECURSE_DIR_SKIP_OPEN_DIR_ERROR_BASE, "failed to open dir %s: %m", path);
break;
case RECURSE_DIR_SKIP_OPEN_INODE_ERROR_BASE...RECURSE_DIR_SKIP_OPEN_INODE_ERROR_MAX:
log_debug_errno(event - RECURSE_DIR_SKIP_OPEN_INODE_ERROR_BASE, "failed to open inode %s: %m", path);
break;
case RECURSE_DIR_SKIP_STAT_INODE_ERROR_BASE...RECURSE_DIR_SKIP_STAT_INODE_ERROR_MAX:
log_debug_errno(event - RECURSE_DIR_SKIP_STAT_INODE_ERROR_BASE, "failed to stat inode %s: %m", path);
break;
default:
assert_not_reached();
}
return RECURSE_DIR_CONTINUE;
}
int main(int argc, char *argv[]) {
_cleanup_strv_free_ char **list_recurse_dir = NULL;
const char *p;
usec_t t1, t2, t3, t4;
_cleanup_close_ int fd = -EBADF;
log_show_color(true);
test_setup_logging(LOG_INFO);
if (argc > 1)
p = argv[1];
else
p = "/usr/share/man"; /* something hopefully reasonably stable while we run (and limited in size) */
fd = open(p, O_DIRECTORY|O_CLOEXEC);
if (fd < 0 && errno == ENOENT)
return log_tests_skipped_errno(errno, "Couldn't open directory %s", p);
assert_se(fd >= 0);
/* If the test directory is on an overlayfs then files and their directory may return different
* st_dev in stat results, which confuses nftw into thinking they're on different filesystems and
* won't return the result when the FTW_MOUNT flag is set. */
if (fd_is_fs_type(fd, OVERLAYFS_SUPER_MAGIC))
return log_tests_skipped("nftw mountpoint detection produces false-positives on overlayfs");
/* Enumerate the specified dirs in full, once via nftw(), and once via recurse_dir(), and ensure the
* results are identical. nftw() sometimes skips symlinks (see
* https://github.com/systemd/systemd/issues/29603), so ignore them to avoid bogus errors. */
t1 = now(CLOCK_MONOTONIC);
assert_se(recurse_dir(fd, p, 0, UINT_MAX, RECURSE_DIR_SORT|RECURSE_DIR_ENSURE_TYPE|RECURSE_DIR_SAME_MOUNT, recurse_dir_callback, &list_recurse_dir) >= 0);
t2 = now(CLOCK_MONOTONIC);
t3 = now(CLOCK_MONOTONIC);
assert_se(nftw(p, nftw_cb, 64, FTW_PHYS|FTW_MOUNT) >= 0);
t4 = now(CLOCK_MONOTONIC);
log_info("recurse_dir(): %s – nftw(): %s", FORMAT_TIMESPAN(t2 - t1, 1), FORMAT_TIMESPAN(t4 - t3, 1));
strv_sort(list_recurse_dir);
strv_sort(list_nftw);
for (size_t i = 0;; i++) {
const char *a = list_nftw ? list_nftw[i] : NULL,
*b = list_recurse_dir ? list_recurse_dir[i] : NULL;
if (!streq_ptr(a, b)) {
log_error("entry %zu different: %s vs %s", i, strna(a), strna(b));
assert_not_reached();
}
if (!a)
break;
}
list_nftw = strv_free(list_nftw);
return 0;
}
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