120 lines
3.1 KiB
C
120 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2013 Wanlong Gao <gaowanlong@cn.fujitsu.com>
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* Copyright (c) 2018 Linux Test Project
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*/
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/*
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* DESCRIPTION
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* Check for the following errors:
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* 1. EEXIST
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* 2. EISDIR
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* 3. ENOTDIR
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* 4. ENAMETOOLONG
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* 5. EACCES
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* 6. EFAULT
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*
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* ALGORITHM
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* 1. Open a file with O_CREAT and O_EXCL, when the file already
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* exists. Check the errno for EEXIST
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*
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* 2. Pass a directory as the pathname and request a write access,
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* check for errno for EISDIR
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*
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* 3. Specify O_DIRECTORY as a parameter to open and pass a file as the
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* pathname, check errno for ENOTDIR
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*
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* 4. Attempt to open() a filename which is more than VFS_MAXNAMLEN, and
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* check for errno to be ENAMETOOLONG.
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*
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* 5. Attempt to open a (0600) file owned by different user in WRONLY mode,
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* open(2) should fail with EACCES.
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*
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* 6. Attempt to pass an invalid pathname with an address pointing outside
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* the accessible address space of the process, as the argument to open(),
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* and expect to get EFAULT.
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*/
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#define _GNU_SOURCE /* for O_DIRECTORY */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <stdio.h>
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#include <errno.h>
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#include <sys/mman.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <pwd.h>
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#include "tst_test.h"
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#include "tst_get_bad_addr.h"
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static char *existing_fname = "open08_testfile";
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static char *toolong_fname = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyz";
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static char *dir_fname = "/tmp";
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static char *user2_fname = "user2_0600";
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static char *unmapped_fname;
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struct test_case_t;
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static struct test_case_t {
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char **fname;
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int flags;
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int error;
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} tcases[] = {
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{&existing_fname, O_CREAT | O_EXCL, EEXIST},
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{&dir_fname, O_RDWR, EISDIR},
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{&existing_fname, O_DIRECTORY, ENOTDIR},
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{&toolong_fname, O_RDWR, ENAMETOOLONG},
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{&user2_fname, O_WRONLY, EACCES},
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{&unmapped_fname, O_CREAT, EFAULT}
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};
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void verify_open(unsigned int i)
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{
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TEST(open(*tcases[i].fname, tcases[i].flags,
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S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH));
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if (TST_RET != -1) {
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tst_res(TFAIL, "call succeeded unexpectedly");
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return;
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}
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if (TST_ERR == tcases[i].error) {
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tst_res(TPASS, "expected failure - "
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"errno = %d : %s", TST_ERR,
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strerror(TST_ERR));
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} else {
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tst_res(TFAIL, "unexpected error - %d : %s - "
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"expected %d", TST_ERR,
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strerror(TST_ERR), tcases[i].error);
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}
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}
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static void setup(void)
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{
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int fildes;
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char nobody_uid[] = "nobody";
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struct passwd *ltpuser;
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umask(0);
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SAFE_CREAT(user2_fname, 0600);
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/* Switch to nobody user for correct error code collection */
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ltpuser = getpwnam(nobody_uid);
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SAFE_SETGID(ltpuser->pw_gid);
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SAFE_SETUID(ltpuser->pw_uid);
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fildes = SAFE_CREAT(existing_fname, 0600);
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close(fildes);
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unmapped_fname = tst_get_bad_addr(NULL);
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}
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static struct tst_test test = {
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.tcnt = ARRAY_SIZE(tcases),
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.needs_tmpdir = 1,
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.needs_root = 1,
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.setup = setup,
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.test = verify_open,
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};
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