| /* |
| * |
| * Copyright (c) International Business Machines Corp., 2001 |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| * the GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /* |
| * Test Name: mknod04 |
| * |
| * Test Description: |
| * Verify that mknod(2) succeeds when used to create a filesystem |
| * node on a directory with set group-ID bit set. |
| * The node created should not have group-ID bit set and its gid should be |
| * equal to the effective gid of the process. |
| * |
| * Expected Result: |
| * mknod() should return value 0 on success and node created should not |
| * have set group-ID bit set and its gid should be equal to the effective |
| * gid of the process. |
| * |
| * Algorithm: |
| * Setup: |
| * Setup signal handling. |
| * Create temporary directory. |
| * Pause for SIGUSR1 if option specified. |
| * |
| * Test: |
| * Loop if the proper options are given. |
| * Execute system call |
| * Check return code, if system call failed (return=-1) |
| * Log the errno and Issue a FAIL message. |
| * Otherwise, |
| * Verify the Functionality of system call |
| * if successful, |
| * Issue Functionality-Pass message. |
| * Otherwise, |
| * Issue Functionality-Fail message. |
| * Cleanup: |
| * Print errno log and/or timing stats if options given |
| * Delete the temporary directory created. |
| * |
| * Usage: <for command-line> |
| * mknod04 [-c n] [-f] [-i n] [-I x] [-P x] [-t] |
| * where, -c n : Run n copies concurrently. |
| * -f : Turn off functionality Testing. |
| * -i n : Execute test n times. |
| * -I x : Execute test for x seconds. |
| * -P x : Pause for x seconds between iterations. |
| * -t : Turn on syscall timing. |
| * |
| * HISTORY |
| * 07/2001 Ported by Wayne Boyer |
| * |
| * RESTRICTIONS: |
| * This test should be run by 'super-user' (root) only. |
| * |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <errno.h> |
| #include <string.h> |
| #include <signal.h> |
| #include <pwd.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| |
| #include "test.h" |
| |
| #define LTPUSER "nobody" |
| #define MODE_RWX S_IFIFO | S_IRWXU | S_IRWXG | S_IRWXO |
| #define MODE_SGID S_IFIFO | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO |
| #define DIR_TEMP "testdir_4" |
| #define TNODE "tnode_%d" |
| |
| struct stat buf; /* struct. to hold stat(2) o/p contents */ |
| struct passwd *user1; /* struct. to hold getpwnam(3) o/p contents */ |
| |
| char *TCID = "mknod04"; |
| int TST_TOTAL = 1; |
| char node_name[PATH_MAX]; /* buffer to hold node name created */ |
| |
| gid_t group1_gid, group2_gid, mygid; /* user and process group id's */ |
| uid_t save_myuid, user1_uid; /* user and process user id's */ |
| pid_t mypid; /* process id */ |
| |
| void setup(); /* setup function for the test */ |
| void cleanup(); /* cleanup function for the test */ |
| |
| int main(int ac, char **av) |
| { |
| int lc; |
| int fflag; |
| |
| tst_parse_opts(ac, av, NULL, NULL); |
| |
| setup(); |
| |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| |
| tst_count = 0; |
| |
| /* |
| * TEST CASE CONDITION: |
| * Attempt to create a filesystem node on a directory |
| * with group id (sgid) bit set such that, |
| * the node created by mknod(2) should not have group id |
| * (sgid) bit set and node's gid should be equal to the |
| * effective gid of the process. |
| */ |
| TEST(mknod(node_name, MODE_RWX, 0)); |
| |
| /* Check return code from mknod(2) */ |
| if (TEST_RETURN == -1) { |
| tst_resm(TFAIL, "mknod(%s, %#o, 0) failed, errno=%d : " |
| "%s", node_name, MODE_RWX, TEST_ERRNO, |
| strerror(TEST_ERRNO)); |
| continue; |
| } |
| /* Set the functionality flag */ |
| fflag = 1; |
| |
| /* Check for node's creation */ |
| if (stat(node_name, &buf) < 0) { |
| tst_resm(TFAIL, "stat() of %s failed, errno:%d", |
| node_name, TEST_ERRNO); |
| /* unset fflag */ |
| fflag = 0; |
| } |
| |
| /* Verify mode permissions of node */ |
| if (buf.st_mode & S_ISGID) { |
| tst_resm(TFAIL, "%s: Incorrect modes, setgid " |
| "bit set", node_name); |
| /* unset flag as functionality fails */ |
| fflag = 0; |
| } |
| |
| /* Verify group ID of node */ |
| if (buf.st_gid != group2_gid) { |
| tst_resm(TFAIL, "%s: Incorrect group", |
| node_name); |
| /* unset flag as functionality fails */ |
| fflag = 0; |
| } |
| if (fflag) { |
| tst_resm(TPASS, "Functionality of mknod(%s, " |
| "%#o, 0) successful", |
| node_name, MODE_RWX); |
| } |
| |
| /* Remove the node for the next go `round */ |
| if (unlink(node_name) == -1) { |
| tst_resm(TWARN, "unlink(%s) failed, errno:%d %s", |
| node_name, errno, strerror(errno)); |
| } |
| } |
| |
| /* Change the directory back to temporary directory */ |
| chdir(".."); |
| |
| /* |
| * Invoke cleanup() to delete the test directories created |
| * in the setup() and exit main(). |
| */ |
| cleanup(); |
| |
| tst_exit(); |
| } |
| |
| /* |
| * void |
| * setup(void) - performs all ONE TIME setup for this test. |
| * Exit the test program on receipt of unexpected signals. |
| * Create a temporary directory used to hold test directories created |
| * and change the directory to it. |
| * Verify that pid of process executing the test is root. |
| * Create a test directory on temporary directory and set the ownership |
| * of test directory to guest user and process, change mode permissions |
| * to set group-id bit on it. |
| * Set the effective uid/gid of the process to that of guest user. |
| */ |
| void setup(void) |
| { |
| tst_require_root(); |
| |
| /* Capture unexpected signals */ |
| tst_sig(NOFORK, DEF_HANDLER, cleanup); |
| |
| TEST_PAUSE; |
| |
| /* Make a temp dir and cd to it */ |
| tst_tmpdir(); |
| |
| /* fix permissions on the tmpdir */ |
| if (chmod(".", 0711) != 0) { |
| tst_brkm(TBROK, cleanup, "chmod() failed"); |
| } |
| |
| /* Save the real user id of the current test process */ |
| save_myuid = getuid(); |
| |
| /* Save the process id of the current test process */ |
| mypid = getpid(); |
| |
| /* Get the node name to be created in the test */ |
| sprintf(node_name, TNODE, mypid); |
| |
| /* Get the uid/gid of ltp user */ |
| if ((user1 = getpwnam(LTPUSER)) == NULL) { |
| tst_brkm(TBROK, cleanup, "%s not in /etc/passwd", LTPUSER); |
| } |
| user1_uid = user1->pw_uid; |
| group1_gid = user1->pw_gid; |
| |
| /* Get the effective group id of the test process */ |
| group2_gid = getegid(); |
| |
| /* |
| * Create a test directory under temporary directory with the |
| * specified mode permissions, with uid/gid set to that of guest |
| * user and the test process. |
| */ |
| if (mkdir(DIR_TEMP, MODE_RWX) < 0) { |
| tst_brkm(TBROK, cleanup, "mkdir(2) of %s failed", DIR_TEMP); |
| } |
| if (chown(DIR_TEMP, user1_uid, group2_gid) < 0) { |
| tst_brkm(TBROK, cleanup, "chown(2) of %s failed", DIR_TEMP); |
| } |
| if (chmod(DIR_TEMP, MODE_SGID) < 0) { |
| tst_brkm(TBROK, cleanup, "chmod(2) of %s failed", DIR_TEMP); |
| } |
| |
| /* |
| * Verify that test directory created with expected permission modes |
| * and ownerships. |
| */ |
| if (stat(DIR_TEMP, &buf) < 0) { |
| tst_brkm(TBROK, cleanup, "stat(2) of %s failed", DIR_TEMP); |
| } |
| |
| /* Verify modes of test directory */ |
| if (!(buf.st_mode & S_ISGID)) { |
| tst_brkm(TBROK, cleanup, |
| "%s: Incorrect modes, setgid bit not set", DIR_TEMP); |
| } |
| |
| /* Verify group ID */ |
| if (buf.st_gid != group2_gid) { |
| tst_brkm(TBROK, cleanup, "%s: Incorrect group", DIR_TEMP); |
| } |
| |
| /* |
| * Set the effective group id and user id of the test process |
| * to that of guest user (nobody) |
| */ |
| if (setgid(group1_gid) < 0) { |
| tst_brkm(TBROK, cleanup, |
| "Unable to set process gid to that of ltp user"); |
| } |
| if (setreuid(-1, user1_uid) < 0) { |
| tst_brkm(TBROK, cleanup, |
| "Unable to set process uid to that of ltp user"); |
| } |
| |
| /* Save the real group ID of the current process */ |
| mygid = getgid(); |
| |
| /* Change directory to DIR_TEMP */ |
| if (chdir(DIR_TEMP) < 0) { |
| tst_brkm(TBROK, cleanup, |
| "Unable to change to %s directory", DIR_TEMP); |
| } |
| } |
| |
| /* |
| * cleanup() - Performs all ONE TIME cleanup for this test at |
| * completion or premature exit. |
| * Print test timing stats and errno log if test executed with options. |
| * Restore the real/effective user id of the process changed during |
| * setup(). |
| * Remove temporary directory and sub-directories/files under it |
| * created during setup(). |
| * Exit the test program with normal exit code. |
| */ |
| void cleanup(void) |
| { |
| |
| /* |
| * Restore the effective uid of the process changed in the |
| * setup(). |
| */ |
| if (setreuid(-1, save_myuid) < 0) { |
| tst_brkm(TBROK, cleanup, |
| "resetting process real/effective uid failed"); |
| } |
| |
| tst_rmdir(); |
| |
| } |