1 /******************************************************************************
2 *
3 * Copyright (c) International Business Machines Corp., 2006
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 * NAME
20 * symlinkat01.c
21 *
22 * DESCRIPTION
23 * This test case will verify basic function of symlinkat
24 * added by kernel 2.6.16 or up.
25 *
26 * Author
27 * Yi Yang <yyangcdl@cn.ibm.com>
28 *
29 * History
30 * 08/25/2006 Created first by Yi Yang <yyangcdl@cn.ibm.com>
31 *
32 *****************************************************************************/
33
34 #define _GNU_SOURCE
35
36 #include <sys/types.h>
37 #include <sys/stat.h>
38 #include <sys/time.h>
39 #include <fcntl.h>
40 #include <error.h>
41 #include <stdlib.h>
42 #include <errno.h>
43 #include <string.h>
44 #include <signal.h>
45 #include "test.h"
46 #include "rmobj.h"
47 #include "linux_syscall_numbers.h"
48
49 #define MYRETCODE -999
50 #ifndef AT_FDCWD
51 #define AT_FDCWD -100
52 #endif
53
54 struct test_struct;
55 static void setup();
56 static void cleanup();
57 static void setup_every_copy();
58 static void mysymlinkat_test(struct test_struct *desc);
59
60 #define TEST_DIR1 "olddir"
61 #define TEST_DIR2 "newdir"
62 #define TEST_DIR3 "deldir"
63 #define TEST_FILE1 "oldfile"
64 #define TEST_FILE2 "newfile"
65 #define TEST_FIFO "fifo"
66
67 static char dpathname[256] = "%s/" TEST_DIR2 "/" TEST_FILE1;
68 static int olddirfd, newdirfd = -1, cwd_fd = AT_FDCWD, stdinfd = 0, crapfd =
69 -1, deldirfd;
70
71 struct test_struct {
72 const char *oldfn;
73 int *newfd;
74 const char *newfn;
75 const char *referencefn1;
76 const char *referencefn2;
77 int expected_errno;
78 } test_desc[] = {
79 /* relative paths */
80 {
81 "../" TEST_DIR1 "/" TEST_FILE1, &newdirfd, TEST_FILE1,
82 TEST_DIR1 "/" TEST_FILE1, TEST_DIR2 "/" TEST_FILE1, 0},
83 /* abs path at dst */
84 {
85 "../" TEST_DIR1 "/" TEST_FILE1, &newdirfd, dpathname,
86 TEST_DIR1 "/" TEST_FILE1, TEST_DIR2 "/" TEST_FILE1, 0},
87 /* relative paths to cwd */
88 {
89 "../" TEST_DIR1 "/" TEST_FILE1, &cwd_fd,
90 TEST_DIR2 "/" TEST_FILE1, TEST_DIR1 "/" TEST_FILE1,
91 TEST_DIR2 "/" TEST_FILE1, 0},
92 /* abs path */
93 {
94 "../" TEST_DIR1 "/" TEST_FILE1, &cwd_fd, dpathname,
95 TEST_DIR1 "/" TEST_FILE1, TEST_DIR2 "/" TEST_FILE1, 0},
96 /* relative paths to invalid */
97 {
98 "../" TEST_DIR1 "/" TEST_FILE1, &stdinfd,
99 TEST_DIR2 "/" TEST_FILE1, 0, 0, ENOTDIR},
100 /* abs path at dst */
101 {
102 "../" TEST_DIR1 "/" TEST_FILE1, &stdinfd, dpathname,
103 TEST_DIR1 "/" TEST_FILE1, TEST_DIR2 "/" TEST_FILE1, 0},
104 /* relative paths to crap */
105 {
106 "../" TEST_DIR1 "/" TEST_FILE1, &crapfd,
107 TEST_DIR2 "/" TEST_FILE1, 0, 0, EBADF},
108 /* abs path at dst */
109 {
110 "../" TEST_DIR1 "/" TEST_FILE1, &crapfd, dpathname,
111 TEST_DIR1 "/" TEST_FILE1, TEST_DIR2 "/" TEST_FILE1, 0},
112 /* relative paths to deleted */
113 {
114 "../" TEST_DIR1 "/" TEST_FILE1, &deldirfd,
115 TEST_DIR2 "/" TEST_FILE1, 0, 0, ENOENT},
116 /* abs path at dst */
117 {
118 "../" TEST_DIR1 "/" TEST_FILE1, &deldirfd, dpathname,
119 TEST_DIR1 "/" TEST_FILE1, TEST_DIR2 "/" TEST_FILE1, 0},
120 /* fifo link */
121 /* { TEST_FIFO, &newdirfd, TEST_FILE1, TEST_DIR1"/"TEST_FIFO, TEST_DIR2"/"TEST_FILE1, 0 }, */
122 };
123
124 char *TCID = "symlinkat01";
125 int TST_TOTAL = sizeof(test_desc) / sizeof(*test_desc);
126
127 #define SUCCEED_OR_DIE(syscall, message, ...) \
128 (errno = 0, \
129 ({int ret=syscall(__VA_ARGS__); \
130 if (ret==-1) \
131 tst_brkm(TBROK, cleanup, message, __VA_ARGS__, strerror(errno)); \
132 ret;}))
133
mysymlinkat(const char * oldfilename,int newdirfd,const char * newfilename)134 static int mysymlinkat(const char *oldfilename,
135 int newdirfd, const char *newfilename)
136 {
137 return ltp_syscall(__NR_symlinkat, oldfilename, newdirfd, newfilename);
138 }
139
main(int ac,char ** av)140 int main(int ac, char **av)
141 {
142 int lc;
143 int i;
144
145 /* Disable test if the version of the kernel is less than 2.6.16 */
146 if ((tst_kvercmp(2, 6, 16)) < 0) {
147 tst_resm(TWARN, "This test can only run on kernels that are ");
148 tst_resm(TWARN, "2.6.16 and higher");
149 exit(0);
150 }
151
152 tst_parse_opts(ac, av, NULL, NULL);
153
154 setup();
155
156 for (lc = 0; TEST_LOOPING(lc); lc++) {
157
158 tst_count = 0;
159
160 for (i = 0; i < TST_TOTAL; i++) {
161 setup_every_copy();
162 mysymlinkat_test(&test_desc[i]);
163
164 }
165
166 }
167
168 cleanup();
169 tst_exit();
170 }
171
setup_every_copy(void)172 static void setup_every_copy(void)
173 {
174 close(newdirfd);
175 rmobj(TEST_DIR2, NULL);
176
177 SUCCEED_OR_DIE(mkdir, "mkdir(%s, %o) failed: %s", TEST_DIR2, 0700);
178 newdirfd =
179 SUCCEED_OR_DIE(open, "open(%s, 0x%x) failed: %s", TEST_DIR2,
180 O_DIRECTORY);
181 }
182
mysymlinkat_test(struct test_struct * desc)183 static void mysymlinkat_test(struct test_struct *desc)
184 {
185 int fd;
186
187 TEST(mysymlinkat(desc->oldfn, *desc->newfd, desc->newfn));
188
189 /* check return code */
190 if (TEST_ERRNO == desc->expected_errno) {
191 if (TEST_RETURN == 0 && desc->referencefn1 != NULL) {
192 int tnum = rand(), vnum = ~tnum;
193 int len;
194 fd = SUCCEED_OR_DIE(open,
195 "open(%s, 0x%x) failed: %s",
196 desc->referencefn1, O_RDWR);
197 if ((len =
198 write(fd, &tnum,
199 sizeof(tnum))) != sizeof(tnum))
200 tst_brkm(TBROK, cleanup,
201 "write() failed: expected %zu, returned %d; error: %s",
202 sizeof(tnum), len,
203 strerror(errno));
204 SUCCEED_OR_DIE(close, "close(%d) failed: %s",
205 fd);
206
207 fd = SUCCEED_OR_DIE(open,
208 "open(%s, 0x%x) failed: %s",
209 desc->referencefn2,
210 O_RDONLY);
211 if ((len =
212 read(fd, &vnum,
213 sizeof(vnum))) != sizeof(tnum))
214 tst_brkm(TBROK, cleanup,
215 "read() failed: expected %zu, returned %d; error: %s",
216 sizeof(vnum), len,
217 strerror(errno));
218 SUCCEED_OR_DIE(close, "close(%d) failed: %s",
219 fd);
220
221 if (tnum == vnum)
222 tst_resm(TPASS, "Test passed");
223 else
224 tst_resm(TFAIL,
225 "The link file's content isn't as same as the original file's "
226 "although symlinkat returned 0");
227 } else {
228 tst_resm(TPASS,
229 "symlinkat() returned the expected errno %d: %s",
230 TEST_ERRNO, strerror(TEST_ERRNO));
231 }
232 } else {
233 tst_resm(TFAIL,
234 TEST_RETURN ==
235 0 ? "symlinkat() surprisingly succeeded" :
236 "symlinkat() Failed, errno=%d : %s", TEST_ERRNO,
237 strerror(TEST_ERRNO));
238 }
239 }
240
setup(void)241 static void setup(void)
242 {
243 char *tmp;
244
245 tst_sig(NOFORK, DEF_HANDLER, cleanup);
246
247 tst_tmpdir();
248
249 SUCCEED_OR_DIE(mkdir, "mkdir(%s, %o) failed: %s", TEST_DIR1, 0700);
250 SUCCEED_OR_DIE(mkdir, "mkdir(%s, %o) failed: %s", TEST_DIR3, 0700);
251 olddirfd =
252 SUCCEED_OR_DIE(open, "open(%s, 0x%x) failed: %s", TEST_DIR1,
253 O_DIRECTORY);
254 deldirfd =
255 SUCCEED_OR_DIE(open, "open(%s, 0x%x) failed: %s", TEST_DIR3,
256 O_DIRECTORY);
257 SUCCEED_OR_DIE(rmdir, "rmdir(%s) failed: %s", TEST_DIR3);
258 SUCCEED_OR_DIE(close, "close(%d) failed: %s",
259 SUCCEED_OR_DIE(open, "open(%s, 0x%x, %o) failed: %s",
260 TEST_DIR1 "/" TEST_FILE1,
261 O_CREAT | O_EXCL, 0600));
262
263 /* gratuitous memory leak here */
264 tmp = strdup(dpathname);
265 snprintf(dpathname, sizeof(dpathname), tmp, get_current_dir_name());
266
267 TEST_PAUSE;
268 }
269
cleanup(void)270 static void cleanup(void)
271 {
272 tst_rmdir();
273 }
274