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169 lines
4.1 KiB
169 lines
4.1 KiB
/*
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* Copyright (c) International Business Machines Corp., 2001
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* Testcase to test whether chroot(2) sets errno correctly.
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*
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* 1. Test for ENAMETOOLONG:
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* Create a bad directory name with length more than
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* VFS_MAXNAMELEN (Linux kernel variable), and pass it as the
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* path to chroot(2).
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*
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* 2. Test for ENOENT:
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* Attempt to chroot(2) on a non-existent directory
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*
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* 3. Test for ENOTDIR:
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* Attempt to chdir(2) on a file.
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*
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* 4. Test for EFAULT:
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* The pathname parameter to chroot() points to an invalid address,
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* chroot(2) fails with EPERM.
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*
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* 5. Test for ELOOP:
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* Too many symbolic links were encountered When resolving the
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* pathname parameter.
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*
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* 07/2001 Ported by Wayne Boyer
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*/
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#include <stdio.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include "test.h"
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#include <fcntl.h>
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#include "safe_macros.h"
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char *TCID = "chroot03";
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static int fd;
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static char fname[255];
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static char nonexistent_dir[100] = "testdir";
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static char bad_dir[] = "abcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyz";
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static char symbolic_dir[] = "sym_dir1";
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struct test_case_t {
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char *dir;
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int error;
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} TC[] = {
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/*
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* to test whether chroot() is setting ENAMETOOLONG if the
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* pathname is more than VFS_MAXNAMELEN
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*/
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{
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bad_dir, ENAMETOOLONG},
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/*
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* to test whether chroot() is setting ENOTDIR if the argument
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* is not a directory.
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*/
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{
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fname, ENOTDIR},
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/*
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* to test whether chroot() is setting ENOENT if the directory
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* does not exist.
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*/
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{
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nonexistent_dir, ENOENT},
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#if !defined(UCLINUX)
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/*
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* attempt to chroot to a path pointing to an invalid address
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* and expect EFAULT as errno
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*/
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{
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(char *)-1, EFAULT},
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#endif
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{symbolic_dir, ELOOP}
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};
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int TST_TOTAL = ARRAY_SIZE(TC);
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static char *bad_addr;
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static void setup(void);
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static void cleanup(void);
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int main(int ac, char **av)
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{
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int lc;
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int i;
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tst_parse_opts(ac, av, NULL, NULL);
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setup();
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for (lc = 0; TEST_LOOPING(lc); lc++) {
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tst_count = 0;
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for (i = 0; i < TST_TOTAL; i++) {
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TEST(chroot(TC[i].dir));
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if (TEST_RETURN != -1) {
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tst_resm(TFAIL, "call succeeded unexpectedly");
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continue;
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}
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if (TEST_ERRNO == TC[i].error) {
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tst_resm(TPASS | TTERRNO, "failed as expected");
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} else {
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tst_resm(TFAIL | TTERRNO,
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"didn't fail as expected (expected errno "
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"= %d : %s)",
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TC[i].error, strerror(TC[i].error));
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}
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}
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}
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cleanup();
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tst_exit();
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}
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static void setup(void)
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{
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tst_sig(NOFORK, DEF_HANDLER, cleanup);
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TEST_PAUSE;
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tst_tmpdir();
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/*
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* create a file and use it to test whether chroot() is setting
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* ENOTDIR if the argument is not a directory.
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*/
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(void)sprintf(fname, "tfile_%d", getpid());
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fd = SAFE_CREAT(cleanup, fname, 0777);
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#if !defined(UCLINUX)
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bad_addr = mmap(0, 1, PROT_NONE,
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MAP_PRIVATE_EXCEPT_UCLINUX | MAP_ANONYMOUS, 0, 0);
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if (bad_addr == MAP_FAILED)
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tst_brkm(TBROK, cleanup, "mmap failed");
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TC[3].dir = bad_addr;
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#endif
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/*
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* create two symbolic directory who point to each other to
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* test ELOOP.
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*/
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SAFE_SYMLINK(cleanup, "sym_dir1/", "sym_dir2");
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SAFE_SYMLINK(cleanup, "sym_dir2/", "sym_dir1");
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}
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static void cleanup(void)
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{
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close(fd);
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tst_rmdir();
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}
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