glibc/io/tst-ftw-lnk.c

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/* Test for ftw function related to symbolic links for BZ #23501
Copyright (C) 2019-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
Prefer https to http for gnu.org and fsf.org URLs Also, change sources.redhat.com to sourceware.org. This patch was automatically generated by running the following shell script, which uses GNU sed, and which avoids modifying files imported from upstream: sed -ri ' s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g ' \ $(find $(git ls-files) -prune -type f \ ! -name '*.po' \ ! -name 'ChangeLog*' \ ! -path COPYING ! -path COPYING.LIB \ ! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \ ! -path manual/texinfo.tex ! -path scripts/config.guess \ ! -path scripts/config.sub ! -path scripts/install-sh \ ! -path scripts/mkinstalldirs ! -path scripts/move-if-change \ ! -path INSTALL ! -path locale/programs/charmap-kw.h \ ! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \ ! '(' -name configure \ -execdir test -f configure.ac -o -f configure.in ';' ')' \ ! '(' -name preconfigure \ -execdir test -f preconfigure.ac ';' ')' \ -print) and then by running 'make dist-prepare' to regenerate files built from the altered files, and then executing the following to cleanup: chmod a+x sysdeps/unix/sysv/linux/riscv/configure # Omit irrelevant whitespace and comment-only changes, # perhaps from a slightly-different Autoconf version. git checkout -f \ sysdeps/csky/configure \ sysdeps/hppa/configure \ sysdeps/riscv/configure \ sysdeps/unix/sysv/linux/csky/configure # Omit changes that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines git checkout -f \ sysdeps/powerpc/powerpc64/ppc-mcount.S \ sysdeps/unix/sysv/linux/s390/s390-64/syscall.S # Omit change that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-09-07 13:40:42 +08:00
<https://www.gnu.org/licenses/>. */
#include <ftw.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <support/support.h>
#include <support/check.h>
#define TSTDIR "tst-ftw-lnk.d"
static void
un (const char *file)
{
struct stat st;
/* Does the file exist? */
if (lstat (file, &st) < 0
&& errno == ENOENT)
return;
/* If so, try to remove it. */
if (unlink (file) < 0)
FAIL_EXIT1 ("Unable to unlink %s", file);
}
static void
debug_cb (const char *which, const char *fpath,
const struct stat *sb, int typeflags)
{
const char *sb_type = "???";
const char *ftw_type = "???";
/* Coding style here is intentionally "wrong" to increase readability. */
if (S_ISREG (sb->st_mode)) sb_type = "REG";
if (S_ISDIR (sb->st_mode)) sb_type = "DIR";
if (S_ISLNK (sb->st_mode)) sb_type = "LNK";
if (typeflags == FTW_F) ftw_type = "F";
if (typeflags == FTW_D) ftw_type = "D";
if (typeflags == FTW_DNR) ftw_type = "DNR";
if (typeflags == FTW_DP) ftw_type = "DP";
if (typeflags == FTW_NS) ftw_type = "NS";
if (typeflags == FTW_SL) ftw_type = "SL";
if (typeflags == FTW_SLN) ftw_type = "SLN";
printf ("%s %5d %-3s %-3s %s\n", which, (int)(sb->st_ino % 100000), sb_type, ftw_type, fpath);
}
int good_cb = 0;
#define EXPECTED_GOOD 12
/* See if the stat buffer SB refers to the file AS_FNAME. */
static void
check_same_stats (const struct stat *sb, const char *as_fname)
{
struct stat as;
if (lstat (as_fname, &as) < 0)
FAIL_EXIT1 ("unable to stat %s for comparison", as_fname);
if (as.st_mode == sb->st_mode
&& as.st_ino == sb->st_ino
&& as.st_size == sb->st_size)
good_cb ++;
else
printf ("statbuf data doesn't match %s\n", as_fname);
}
static int
callback_phys (const char *fpath, const struct stat *sb, int typeflags, struct FTW *ftwbuf)
{
debug_cb ("P", fpath, sb, typeflags);
/* This callback is for when the FTW_PHYS flag is set. The results
should reflect the physical filesystem entry, not what it might
point to. */
/* link1-bad is a dangling symlink, but we're reporting on the link
anyway (ala lstat ()). */
if (strcmp (fpath, "./link1-bad") == 0)
{
if (S_ISLNK (sb->st_mode) && typeflags == FTW_SL)
good_cb ++;
else
printf ("link1-bad had wrong phys stats\n");
check_same_stats (sb, "link1-bad");
}
/* link2-ok is a regular non-dangling symlink. */
if (strcmp (fpath, "./link2-ok") == 0)
{
if (S_ISLNK (sb->st_mode) && typeflags == FTW_SL)
good_cb ++;
else
printf ("link2-ok had wrong phys stats\n");
check_same_stats (sb, "link2-ok");
}
/* This is the file link2-ok points to. */
if (strcmp (fpath, "./link2-tgt") == 0)
{
if (S_ISREG (sb->st_mode) && typeflags == FTW_F)
good_cb ++;
else
printf ("link2-tgt had wrong phys stats\n");
check_same_stats (sb, "link2-tgt");
}
return 0;
}
static int
callback_log (const char *fpath, const struct stat *sb, int typeflags, struct FTW *ftwbuf)
{
debug_cb ("L", fpath, sb, typeflags);
/* This callback is for when the FTW_PHYS flags is NOT set. The
results should reflect the logical file, i.e. symlinks should be
followed. */
/* We would normally report what link1-bad links to, but link1-bad
is a dangling symlink. This is an exception to FTW_PHYS in that
we report FTW_SLN (dangling symlink) but the stat data is
correctly set to the link itself (ala lstat ()). */
if (strcmp (fpath, "./link1-bad") == 0)
{
if (S_ISLNK (sb->st_mode) && typeflags == FTW_SLN)
good_cb ++;
else
printf ("link1-bad had wrong logical stats\n");
check_same_stats (sb, "link1-bad");
}
/* link2-ok points to link2-tgt, so we expect data reflecting
link2-tgt (ala stat ()). */
if (strcmp (fpath, "./link2-ok") == 0)
{
if (S_ISREG (sb->st_mode) && typeflags == FTW_F)
good_cb ++;
else
printf ("link2-ok had wrong logical stats\n");
check_same_stats (sb, "link2-tgt");
}
/* This is the file link2-ok points to. */
if (strcmp (fpath, "./link2-tgt") == 0)
{
if (S_ISREG (sb->st_mode) && typeflags == FTW_F)
good_cb ++;
else
printf ("link2-tgt had wrong logical stats\n");
check_same_stats (sb, "link2-tgt");
}
return 0;
}
static int
do_test (void)
{
struct stat st;
if (chdir (support_objdir_root) < 0)
FAIL_EXIT1 ("cannot chdir to objdir root");
if (chdir ("io") < 0)
FAIL_EXIT1 ("cannot chdir to objdir/io subdir");
if (stat (TSTDIR, &st) >= 0)
{
/* Directory does exist, delete any potential conflicts. */
if (chdir (TSTDIR) < 0)
FAIL_EXIT1 ("cannot chdir to %s\n", TSTDIR);
un ("link1-bad");
un ("link1-tgt");
un ("link2-ok");
un ("link2-tgt");
}
else
{
/* Directory does not exist, create it. */
mkdir (TSTDIR, 0777);
if (chdir (TSTDIR) < 0)
FAIL_EXIT1 ("cannot chdir to %s\n", TSTDIR);
}
/* At this point, we're inside our test directory, and need to
prepare it. */
if (symlink ("link1-tgt", "link1-bad") < 0)
FAIL_EXIT1 ("symlink link1-bad failed");
if (symlink ("link2-tgt", "link2-ok") < 0)
FAIL_EXIT1 ("symlink link2-ok failed");
if (open ("link2-tgt", O_RDWR|O_CREAT, 0777) < 0)
FAIL_EXIT1 ("create of link2-tgt failed");
/* Now we run the tests. */
nftw (".", callback_phys, 10, FTW_PHYS);
nftw (".", callback_log, 10, 0);
/* Did we see the expected number of correct callbacks? */
if (good_cb != EXPECTED_GOOD)
{
FAIL_EXIT1 ("Saw %d good callbacks, expected %d\n",
good_cb, EXPECTED_GOOD);
}
return 0;
}
#include <support/test-driver.c>