1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) International Business Machines Corp., 2001
4 * Ported to LTP: Wayne Boyer
5 * 06/2017 Modified by Guangwen Feng <fenggw-fnst@cn.fujitsu.com>
6 */
7
8 /*
9 * DESCRIPTION
10 * Open a file with oflag = O_CREAT set, does it set the sticky bit off?
11 * Open a dir with O_DIRECTORY, does it set the S_IFDIR bit on?
12 *
13 * ALGORITHM
14 * 1. open a new file with O_CREAT, fstat.st_mode should not have the
15 * 01000 bit on. In Linux, the save text bit is *NOT* cleared.
16 * 2. open a new dir with O_DIRECTORY, fstat.st_mode should have the
17 * 040000 bit on.
18 */
19
20 #define _GNU_SOURCE /* for O_DIRECTORY */
21 #include <sys/types.h>
22 #include <sys/stat.h>
23 #include <fcntl.h>
24 #include <errno.h>
25 #include "tst_test.h"
26
27 #define TEST_FILE "testfile"
28 #define TEST_DIR "testdir"
29
30 static int fd;
31
32 static struct tcase {
33 char *filename;
34 int flag;
35 mode_t mode;
36 unsigned short tst_bit;
37 char *desc;
38 } tcases[] = {
39 {TEST_FILE, O_RDWR | O_CREAT, 01444, S_ISVTX, "Sticky bit"},
40 {TEST_DIR, O_DIRECTORY, 0, S_IFDIR, "Directory bit"}
41 };
42
verify_open(unsigned int n)43 static void verify_open(unsigned int n)
44 {
45 struct tcase *tc = &tcases[n];
46 struct stat buf;
47
48 TEST(open(tc->filename, tc->flag, tc->mode));
49 fd = TST_RET;
50 if (fd == -1) {
51 tst_res(TFAIL, "Cannot open a file");
52 return;
53 }
54
55 SAFE_FSTAT(fd, &buf);
56 if (!(buf.st_mode & tc->tst_bit))
57 tst_res(TFAIL, "%s is cleared unexpectedly", tc->desc);
58 else
59 tst_res(TPASS, "%s is set as expected", tc->desc);
60
61 SAFE_CLOSE(fd);
62 if (S_ISREG(buf.st_mode))
63 SAFE_UNLINK(tc->filename);
64 }
65
setup(void)66 static void setup(void)
67 {
68 SAFE_MKDIR(TEST_DIR, 0755);
69 }
70
cleanup(void)71 static void cleanup(void)
72 {
73 if (fd > 0)
74 SAFE_CLOSE(fd);
75 }
76
77 static struct tst_test test = {
78 .tcnt = ARRAY_SIZE(tcases),
79 .needs_tmpdir = 1,
80 .setup = setup,
81 .cleanup = cleanup,
82 .test = verify_open,
83 };
84