Zeng Linggang | b6b7bc4 | 2014-02-26 17:36:10 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2014 Fujitsu Ltd. |
| 3 | * Author: Zeng Linggang <zenglg.jy@cn.fujitsu.com> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of version 2 of the GNU General Public License as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it would be useful, but |
| 10 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along |
| 14 | * with this program. |
| 15 | */ |
| 16 | /* |
| 17 | * Test Description: |
| 18 | * Verify that, |
| 19 | * The flag of fchownat() is AT_SYMLINK_NOFOLLOW and the pathname would |
| 20 | * not be dereferenced if the pathname is a symbolic link. |
| 21 | */ |
| 22 | |
| 23 | #define _GNU_SOURCE |
| 24 | |
| 25 | #include <sys/types.h> |
| 26 | #include <sys/stat.h> |
| 27 | #include <fcntl.h> |
| 28 | #include <unistd.h> |
| 29 | #include <error.h> |
| 30 | #include <stdlib.h> |
| 31 | #include <errno.h> |
| 32 | #include <string.h> |
| 33 | #include <signal.h> |
| 34 | #include "test.h" |
Zeng Linggang | b6b7bc4 | 2014-02-26 17:36:10 +0800 | [diff] [blame] | 35 | #include "safe_macros.h" |
| 36 | #include "fchownat.h" |
| 37 | #include "lapi/fcntl.h" |
| 38 | |
| 39 | #define TESTFILE "testfile" |
| 40 | #define TESTFILE_LINK "testfile_link" |
| 41 | |
| 42 | char *TCID = "fchownat02"; |
| 43 | int TST_TOTAL = 1; |
| 44 | |
| 45 | static int dirfd; |
| 46 | static uid_t set_uid = 1000; |
| 47 | static gid_t set_gid = 1000; |
| 48 | static void setup(void); |
| 49 | static void cleanup(void); |
| 50 | static void test_verify(void); |
| 51 | static void fchownat_verify(void); |
| 52 | |
| 53 | int main(int ac, char **av) |
| 54 | { |
| 55 | int lc; |
Cyril Hrubis | 0b9589f | 2014-05-27 17:40:33 +0200 | [diff] [blame] | 56 | const char *msg; |
Zeng Linggang | b6b7bc4 | 2014-02-26 17:36:10 +0800 | [diff] [blame] | 57 | int i; |
| 58 | |
| 59 | msg = parse_opts(ac, av, NULL, NULL); |
| 60 | if (msg != NULL) |
| 61 | tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
| 62 | |
| 63 | setup(); |
| 64 | |
| 65 | for (lc = 0; TEST_LOOPING(lc); lc++) { |
| 66 | tst_count = 0; |
| 67 | for (i = 0; i < TST_TOTAL; i++) |
| 68 | fchownat_verify(); |
| 69 | } |
| 70 | |
| 71 | cleanup(); |
| 72 | tst_exit(); |
| 73 | } |
| 74 | |
| 75 | static void setup(void) |
| 76 | { |
| 77 | struct stat c_buf, l_buf; |
| 78 | |
| 79 | if ((tst_kvercmp(2, 6, 16)) < 0) |
| 80 | tst_brkm(TCONF, NULL, "This test needs kernel 2.6.16 or newer"); |
| 81 | |
| 82 | tst_require_root(NULL); |
| 83 | |
| 84 | tst_sig(NOFORK, DEF_HANDLER, cleanup); |
| 85 | |
| 86 | TEST_PAUSE; |
| 87 | |
| 88 | tst_tmpdir(); |
| 89 | |
| 90 | dirfd = SAFE_OPEN(cleanup, "./", O_DIRECTORY); |
| 91 | |
| 92 | SAFE_TOUCH(cleanup, TESTFILE, 0600, NULL); |
| 93 | |
| 94 | SAFE_SYMLINK(cleanup, TESTFILE, TESTFILE_LINK); |
| 95 | |
| 96 | SAFE_STAT(cleanup, TESTFILE_LINK, &c_buf); |
| 97 | |
| 98 | SAFE_LSTAT(cleanup, TESTFILE_LINK, &l_buf); |
| 99 | |
| 100 | if (l_buf.st_uid == set_uid || l_buf.st_gid == set_gid) { |
| 101 | tst_brkm(TBROK | TERRNO, cleanup, |
| 102 | "link_uid(%d) == set_uid(%d) or link_gid(%d) == " |
| 103 | "set_gid(%d)", l_buf.st_uid, set_uid, l_buf.st_gid, |
| 104 | set_gid); |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | static void fchownat_verify(void) |
| 109 | { |
| 110 | TEST(fchownat(dirfd, TESTFILE_LINK, set_uid, set_gid, |
| 111 | AT_SYMLINK_NOFOLLOW)); |
| 112 | |
| 113 | if (TEST_RETURN != 0) { |
| 114 | tst_resm(TFAIL | TTERRNO, "fchownat() failed, errno=%d : %s", |
| 115 | TEST_ERRNO, strerror(TEST_ERRNO)); |
| 116 | } else { |
| 117 | test_verify(); |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | static void test_verify(void) |
| 122 | { |
| 123 | struct stat c_buf, l_buf; |
| 124 | |
| 125 | SAFE_STAT(cleanup, TESTFILE_LINK, &c_buf); |
| 126 | |
| 127 | SAFE_LSTAT(cleanup, TESTFILE_LINK, &l_buf); |
| 128 | |
| 129 | if (c_buf.st_uid != set_uid && l_buf.st_uid == set_uid && |
| 130 | c_buf.st_gid != set_gid && l_buf.st_gid == set_gid) { |
| 131 | tst_resm(TPASS, "fchownat() test AT_SYMLINK_NOFOLLOW success"); |
| 132 | } else { |
| 133 | tst_resm(TFAIL, |
| 134 | "fchownat() test AT_SYMLINK_NOFOLLOW fail with uid=%d " |
| 135 | "link_uid=%d set_uid=%d | gid=%d link_gid=%d " |
| 136 | "set_gid=%d", c_buf.st_uid, l_buf.st_uid, set_uid, |
| 137 | c_buf.st_gid, l_buf.st_gid, set_gid); |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | static void cleanup(void) |
| 142 | { |
| 143 | tst_rmdir(); |
Zeng Linggang | b6b7bc4 | 2014-02-26 17:36:10 +0800 | [diff] [blame] | 144 | } |