fchmod02.c revision 0b9589f3f9c0345b29cfcf7da5a1253c708303eb
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: fchmod02 22 * 23 * Test Description: 24 * Verify that, fchmod(2) will succeed to change the mode of a file/directory 25 * set the sticky bit on it if invoked by root (uid = 0) process with 26 * the following constraints, 27 * - the process is not the owner of the file/directory. 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/directory. 30 * 31 * Expected Result: 32 * fchmod() should return value 0 on success and succeeds to set sticky bit 33 * on the specified file. 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 * fchmod02 [-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 'super-user' (root) 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 <grp.h> 81#include <pwd.h> 82 83#include "test.h" 84#include "usctest.h" 85 86#define LTPUSER "nobody" 87#define LTPGRP "users" 88#define FILE_MODE S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH 89#define PERMS 01777 /* 90 * Mode permissions of test file with sticky 91 * bit set. 92 */ 93#define TESTFILE "testfile" 94 95int fd; /* file descriptor variable */ 96char *TCID = "fchmod02"; 97int TST_TOTAL = 1; 98 99void setup(); /* Main setup function for the test */ 100void cleanup(); /* Main cleanup function for the test */ 101 102int main(int ac, char **av) 103{ 104 struct stat stat_buf; /* stat(2) struct contents */ 105 int lc; 106 const char *msg; 107 108 msg = parse_opts(ac, av, NULL, NULL); 109 if (msg != NULL) { 110 tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); 111 112 } 113 114 setup(); 115 116 for (lc = 0; TEST_LOOPING(lc); lc++) { 117 118 tst_count = 0; 119 120 /* 121 * Call fchmod(2) with specified mode argument 122 * (sticky-bit set) on testfile. 123 */ 124 TEST(fchmod(fd, PERMS)); 125 126 if (TEST_RETURN == -1) { 127 tst_resm(TFAIL, "fchmod(%d, %#o) Failed, errno=%d : %s", 128 fd, PERMS, TEST_ERRNO, strerror(TEST_ERRNO)); 129 continue; 130 } 131 /* 132 * Perform functional verification if test 133 * executed without (-f) option. 134 */ 135 if (STD_FUNCTIONAL_TEST) { 136 /* 137 * Get the testfile information using 138 * fstat(2). 139 */ 140 if (fstat(fd, &stat_buf) < 0) { 141 tst_brkm(TFAIL, cleanup, "fstat(2) of %s " 142 "failed, errno:%d", TESTFILE, 143 TEST_ERRNO); 144 } 145 146 /* Check for expected mode permissions */ 147 if ((stat_buf.st_mode & PERMS) == PERMS) { 148 tst_resm(TPASS, "Functionality of fchmod(%d, " 149 "%#o) Successful", fd, PERMS); 150 } else { 151 tst_resm(TFAIL, "%s: Incorrect modes 0%03o, " 152 "Expected 0%03o", TESTFILE, 153 stat_buf.st_mode, PERMS); 154 } 155 } else { 156 tst_resm(TPASS, "call succeeded"); 157 } 158 } 159 160 cleanup(); 161 162 tst_exit(); 163} 164 165/* 166 * void 167 * setup() - performs all ONE TIME setup for this test. 168 * Create a temporary directory and change directory to it. 169 * Create a test file under temporary directory. 170 * Change the ownership of test file to that of "ltpuser1" user. 171 */ 172void setup(void) 173{ 174 struct passwd *ltpuser; /* password struct for ltpuser1 */ 175 struct group *ltpgroup; /* group struct for ltpuser1 */ 176 gid_t group1_gid; /* user and process group id's */ 177 uid_t user1_uid; 178 179 tst_sig(FORK, DEF_HANDLER, cleanup); 180 181 TEST_PAUSE; 182 183 /* Check that the test process id is super/root */ 184 if (geteuid() != 0) { 185 tst_brkm(TBROK, NULL, "Must be super/root for this test!"); 186 tst_exit(); 187 } 188 189 tst_tmpdir(); 190 191 /* Get the uid of guest user - ltpuser1 */ 192 if ((ltpuser = getpwnam(LTPUSER)) == NULL) { 193 tst_brkm(TBROK, cleanup, "%s not in /etc/passwd", LTPUSER); 194 } 195 user1_uid = ltpuser->pw_uid; 196 197 /* Get the group id of guest user - ltpuser1 */ 198 if ((ltpgroup = getgrnam(LTPGRP)) == NULL) { 199 tst_brkm(TBROK, cleanup, "%s not in /etc/group", LTPGRP); 200 } 201 group1_gid = ltpgroup->gr_gid; 202 203 /* 204 * Create a test file under temporary directory with specified 205 * mode permissios and set the ownership of the test file to the 206 * uid/gid of guest user user1. 207 */ 208 if ((fd = open(TESTFILE, O_RDWR | O_CREAT, FILE_MODE)) == -1) { 209 tst_brkm(TBROK, cleanup, 210 "open(%s, O_RDWR|O_CREAT, %#o) Failed, errno=%d : %s", 211 TESTFILE, FILE_MODE, errno, strerror(errno)); 212 } 213 214 if (chown(TESTFILE, user1_uid, group1_gid) < 0) { 215 tst_brkm(TBROK, cleanup, "chown(2) of %s failed", TESTFILE); 216 } 217 218 /* Set the effective gid of the process to that of user */ 219 if (setgid(group1_gid) < 0) { 220 tst_brkm(TBROK, cleanup, "setgid(2) to %d failed", group1_gid); 221 } 222} 223 224/* 225 * void 226 * cleanup() - performs all ONE TIME cleanup for this test at 227 * completion or premature exit. 228 * Close the testfile created in the setup. 229 * Remove the test directory and testfile created in the setup. 230 */ 231void cleanup(void) 232{ 233 /* 234 * print timing stats if that option was specified. 235 */ 236 TEST_CLEANUP; 237 238 /* Close the testfile created in the setup() */ 239 if (close(fd) == -1) { 240 tst_brkm(TBROK, NULL, "close(%s) Failed, errno=%d : %s", 241 TESTFILE, errno, strerror(errno)); 242 } 243 244 tst_rmdir(); 245 246} 247