lstat03.c revision 7d0a4a57fbcd47f72b67c08df532e8ef47f6fdae 
1/*
2 *
3 *   Copyright (c) International Business Machines  Corp., 2001
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20/*
21 * Test Name: lstat03
22 *
23 * Test Description:
24 *  Verify that, lstat(2) succeeds to get the status of a file pointed to by
25 *  symlink and fills the stat structure elements.
26 *
27 * Expected Result:
28 *  lstat() should return value 0 on success and the stat structure elements
29 *  should be filled with the symlink file information.
30 *
31 * Algorithm:
32 *  Setup:
33 *   Setup signal handling.
34 *   Create temporary directory.
35 *   Pause for SIGUSR1 if option specified.
36 *
37 *  Test:
38 *   Loop if the proper options are given.
39 *   Execute system call
40 *   Check return code, if system call failed (return=-1)
41 *   	Log the errno and Issue a FAIL message.
42 *   Otherwise,
43 *   	Verify the Functionality of system call
44 *      if successful,
45 *      	Issue Functionality-Pass message.
46 *      Otherwise,
47 *		Issue Functionality-Fail message.
48 *  Cleanup:
49 *   Print errno log and/or timing stats if options given
50 *   Delete the temporary directory created.
51 *
52 * Usage:  <for command-line>
53 *  lstat03 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
54 *     where,  -c n : Run n copies concurrently.
55 *             -f   : Turn off functionality Testing.
56 *	       -i n : Execute test n times.
57 *	       -I x : Execute test for x seconds.
58 *	       -P x : Pause for x seconds between iterations.
59 *	       -t   : Turn on syscall timing.
60 *
61 * HISTORY
62 *	07/2001 Ported by Wayne Boyer
63 *
64 * RESTRICTIONS:
65 *  This test should be run by 'non-super-user' only.
66 *
67 */
68#include <stdio.h>
69#include <sys/types.h>
70#include <sys/fcntl.h>
71#include <sys/stat.h>
72#include <errno.h>
73#include <string.h>
74#include <signal.h>
75#include <pwd.h>
76
77#include "test.h"
78#include "usctest.h"
79
80#define FILE_MODE	S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH
81#define TESTFILE	"testfile"
82#define SFILE		"sfile"
83#define FILE_SIZE       1024
84#define BUF_SIZE	256
85#define PERMS		0644
86
87char *TCID = "lstat03";		/* Test program identifier.    */
88int TST_TOTAL = 1;		/* Total number of test cases. */
89extern int Tst_count;		/* Test Case counter for tst_* routines */
90uid_t user_id;			/* user id/group id of test process */
91gid_t group_id;
92
93char nobody_uid[] = "nobody";
94struct passwd *ltpuser;
95
96void setup();			/* Setup function for the test */
97void cleanup();			/* Cleanup function for the test */
98
99int main(int ac, char **av)
100{
101	struct stat stat_buf;	/* stat structure buffer */
102	int lc;			/* loop counter */
103	char *msg;		/* message returned from parse_opts */
104
105	/* Parse standard options given to run the test. */
106	msg = parse_opts(ac, av, NULL, NULL);
107	if (msg != NULL) {
108		tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
109
110	}
111
112	setup();
113
114	for (lc = 0; TEST_LOOPING(lc); lc++) {
115
116		Tst_count = 0;
117
118		/*
119		 * Call lstat(2) to get the status of
120		 * symlink file into stat structure.
121		 */
122		TEST(lstat(SFILE, &stat_buf));
123
124		if (TEST_RETURN == -1) {
125			tst_resm(TFAIL,
126				 "lstat(%s, &stat_buf) Failed, errno=%d : %s",
127				 SFILE, TEST_ERRNO, strerror(TEST_ERRNO));
128			continue;
129		}
130		/*
131		 * Perform functional verification if test
132		 * executed without (-f) option.
133		 */
134		if (STD_FUNCTIONAL_TEST) {
135			/*
136			 * Verify the data returned by lstat(2)
137			 * aganist the expected data.
138			 */
139			if ((stat_buf.st_uid != user_id) ||
140			    (stat_buf.st_gid != group_id) ||
141			    (!(stat_buf.st_mode && S_IFLNK)) ||
142			    (stat_buf.st_size != strlen(TESTFILE))) {
143				tst_resm(TFAIL, "Functionality of lstat(2) on "
144					 "'%s' Failed", SFILE);
145			} else {
146				tst_resm(TPASS, "Functionality of lstat(2) on "
147					 "'%s' Succcessful", SFILE);
148			}
149		} else {
150			tst_resm(TPASS, "call succeeded");
151		}
152	}
153
154	cleanup();
155
156}
157
158/*
159 * setup() -  Performs setup function for the test.
160 *	      Creat a temporary directory and chdir to it.
161 *	      Creat a test file and write some known data into it.
162 *	      Close the test file and creat a symlink of test file under
163 *	      temporary directory.
164 *	      Get uid/gid of test process.
165 */
166void setup()
167{
168	int i, fd;		/* file handle for test file */
169	char tst_buff[BUF_SIZE];	/* data buffer */
170	int wbytes;		/* no. of bytes to be written */
171	int write_len = 0;	/* size of data */
172
173	tst_sig(NOFORK, DEF_HANDLER, cleanup);
174
175	/* Switch to nobody user for correct error code collection */
176	if (geteuid() != 0) {
177		tst_brkm(TBROK, NULL, "Test must be run as root");
178	}
179	ltpuser = getpwnam(nobody_uid);
180	if (setuid(ltpuser->pw_uid) == -1) {
181		tst_resm(TINFO, "setuid failed to "
182			 "to set the effective uid to %d", ltpuser->pw_uid);
183		perror("setuid");
184	}
185
186	TEST_PAUSE;
187
188	tst_tmpdir();
189
190	if ((fd = open(TESTFILE, O_RDWR | O_CREAT, FILE_MODE)) == -1) {
191		tst_brkm(TBROK, cleanup,
192			 "open(%s, O_RDWR|O_CREAT, %#o) Failed, errno=%d : %s",
193			 TESTFILE, FILE_MODE, errno, strerror(errno));
194	}
195
196	/* Fill the test buffer with the known data */
197	for (i = 0; i < BUF_SIZE; i++) {
198		tst_buff[i] = 'a';
199	}
200
201	/* Write to the file 1k data from the buffer */
202	while (write_len < FILE_SIZE) {
203		if ((wbytes = write(fd, tst_buff, sizeof(tst_buff))) <= 0) {
204			tst_brkm(TBROK, cleanup,
205				 "write(2) on %s Failed, errno=%d : %s",
206				 TESTFILE, errno, strerror(errno));
207		} else {
208			write_len += wbytes;
209		}
210	}
211
212	if (close(fd) == -1) {
213		tst_resm(TWARN, "close(%s) Failed, errno=%d : %s",
214			 TESTFILE, errno, strerror(errno));
215	}
216
217	/* Create a symlink of testfile */
218	if (symlink(TESTFILE, SFILE) < 0) {
219		tst_brkm(TBROK, cleanup, "symlink() of %s Failed, errno=%d : "
220			 "%s", TESTFILE, errno, strerror(errno));
221	}
222
223	/* Get the uid/gid of the process */
224	user_id = getuid();
225	group_id = getgid();
226}
227
228/*
229 * cleanup() - performs all ONE TIME cleanup for this test at
230 *	       completion or premature exit.
231 *	       Remove the symlink file, test file and temporary directory.
232 */
233void cleanup()
234{
235	/*
236	 * print timing stats if that option was specified.
237	 * print errno log if that option was specified.
238	 */
239	TEST_CLEANUP;
240
241	tst_rmdir();
242
243}