fchmod03.c revision 4548c6cf9bcdd96d8303caa4130ab638b61f8a30 
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20/*
21 * Test Name: fchmod03
22 *
23 * Test Description:
24 *  Verify that, fchmod(2) will succeed to change the mode of a file
25 *  and set the sticky bit on it if invoked by non-root (uid != 0)
26 *  process with the following constraints,
27 *	- the process is the owner of the file.
28 *	- the effective group ID or one of the supplementary group ID's of the
29 *	  process is equal to the group ID of the file.
30 *
31 * Expected Result:
32 *  fchmod() should return value 0 on success and succeeds to change
33 *  the mode of specified file, sets sticky bit on it.
34 *
35 * Algorithm:
36 *  Setup:
37 *   Setup signal handling.
38 *   Create temporary directory.
39 *   Pause for SIGUSR1 if option specified.
40 *
41 *  Test:
42 *   Loop if the proper options are given.
43 *   Execute system call
44 *   Check return code, if system call failed (return=-1)
45 *   	Log the errno and Issue a FAIL message.
46 *   Otherwise,
47 *   	Verify the Functionality of system call
48 *      if successful,
49 *      	Issue Functionality-Pass message.
50 *      Otherwise,
51 *		Issue Functionality-Fail message.
52 *  Cleanup:
53 *   Print errno log and/or timing stats if options given
54 *   Delete the temporary directory created.
55 *
56 * Usage:  <for command-line>
57 *  fchmod03 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
58 *     where,  -c n : Run n copies concurrently.
59 *             -f   : Turn off functionality Testing.
60 *	       -i n : Execute test n times.
61 *	       -I x : Execute test for x seconds.
62 *	       -P x : Pause for x seconds between iterations.
63 *	       -t   : Turn on syscall timing.
64 *
65 * HISTORY
66 *	07/2001 Ported by Wayne Boyer
67 *
68 * RESTRICTIONS:
69 *  This test should be run by 'non-super-user' only.
70 *
71 */
72
73#include <stdio.h>
74#include <sys/types.h>
75#include <sys/stat.h>
76#include <sys/fcntl.h>
77#include <errno.h>
78#include <string.h>
79#include <signal.h>
80#include <pwd.h>
81
82#include "test.h"
83#include "usctest.h"
84
85#define FILE_MODE       (S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)
86#define PERMS		01777
87#define TESTFILE	"testfile"
88
89int fd;				/* file descriptor for test file */
90char *TCID = "fchmod03";	/* Test program identifier.    */
91int TST_TOTAL = 1;		/* Total number of test cases. */
92
93char nobody_uid[] = "nobody";
94struct passwd *ltpuser;
95
96void setup();			/* Main setup function for the test */
97void cleanup();			/* Main cleanup function for the test */
98
99int main(int ac, char **av)
100{
101	struct stat stat_buf;	/* stat struct. */
102	int lc;			/* loop counter */
103	char *msg;		/* message returned from parse_opts */
104	mode_t file_mode;	/* mode permissions set on testfile */
105
106	if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL)
107		tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
108
109	setup();
110
111	for (lc = 0; TEST_LOOPING(lc); lc++) {
112
113		Tst_count = 0;
114
115		TEST(fchmod(fd, PERMS));
116
117		if (TEST_RETURN == -1) {
118			tst_resm(TFAIL|TTERRNO, "fchmod failed");
119			continue;
120		}
121		/*
122		 * Perform functional verification if test
123		 * executed without (-f) option.
124		 */
125		if (STD_FUNCTIONAL_TEST) {
126			/*
127			 * Get the file information using
128			 * fstat(2).
129			 */
130			if (fstat(fd, &stat_buf) == -1)
131				tst_brkm(TFAIL|TERRNO, cleanup, "fstat failed");
132			file_mode = stat_buf.st_mode;
133
134			/* Verify STICKY BIT set on testfile */
135			if ((file_mode & PERMS) != PERMS)
136				tst_resm(TFAIL, "%s: Incorrect modes 0%3o, "
137					 "Expected 0777", TESTFILE, file_mode);
138			else
139				tst_resm(TPASS, "Functionality of fchmod(%d, "
140					 "%#o) successful", fd, PERMS);
141		} else
142			tst_resm(TPASS, "call succeeded");
143	}
144
145	cleanup();
146
147	tst_exit();
148}
149
150void setup()
151{
152
153	tst_sig(NOFORK, DEF_HANDLER, cleanup);
154
155	tst_require_root(NULL);
156
157	ltpuser = getpwnam(nobody_uid);
158	if (ltpuser == NULL)
159		tst_brkm(TBROK|TERRNO, NULL, "getpwnam failed");
160	if (seteuid(ltpuser->pw_uid) == -1)
161		tst_brkm(TBROK|TERRNO, NULL, "seteuid failed");
162
163	TEST_PAUSE;
164
165	tst_tmpdir();
166
167	/*
168	 * Create a test file under temporary directory with specified
169	 * mode permissios and set the ownership of the test file to the
170	 * uid/gid of guest user.
171	 */
172	if ((fd = open(TESTFILE, O_RDWR | O_CREAT, FILE_MODE)) == -1)
173		tst_brkm(TBROK|TERRNO, cleanup, "open failed");
174}
175
176void cleanup()
177{
178	TEST_CLEANUP;
179
180	if (close(fd) == -1)
181		tst_resm(TWARN|TERRNO, "close failed");
182
183	tst_rmdir();
184
185}
186