| /* |
| * Copyright (c) International Business Machines Corp., 2000 |
| * Copyright (c) 2010 Cyril Hrubis chrubis@suse.cz |
| * |
| * 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 |
| */ |
| |
| /* |
| * FILE(s) : fs_perms.c simpletest.sh textx.o Makefile README |
| * DESCRIPTION : Regression test for Linux filesystem permissions. |
| * AUTHOR : Jeff Martin (martinjn@us.ibm.com) |
| * HISTORY : |
| * (04/12/01)v.99 First attempt at using C for fs-regression test. Only tests read and write bits. |
| * (04/19/01)v1.0 Added test for execute bit. |
| * (05/23/01)v1.1 Added command line parameter to specify test file. |
| * (07/12/01)v1.2 Removed conf file and went to command line parameters. |
| * (10/19/04) Rewritten to fit ltp test interface. |
| * Also now we try to run two different files, one is executed by execl, |
| * has shebang and should end up executed by kernel, other one is empty |
| * is executed by execlp and should end up executed by libc. |
| */ |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include <ctype.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <wait.h> |
| #include <linux/limits.h> |
| |
| #include "test.h" |
| |
| #define TEST_FILE_NAME1 "./test.file1" |
| #define TEST_FILE_NAME2 "./test.file2" |
| |
| char *TCID = "fs_perms"; |
| int TST_TOTAL = 1; |
| |
| static void cleanup(void) |
| { |
| seteuid(0); |
| setegid(0); |
| |
| tst_rmdir(); |
| |
| } |
| |
| /* |
| * Create file and set permissions, user id, group id. |
| * |
| * If flag is non zero, the file contains #!/PATH/sh shebang otherwise it's |
| * empty. |
| */ |
| static void testsetup(const char *file_name, int flag, mode_t mode, |
| int user_id, int group_id) |
| { |
| FILE *file; |
| |
| file = fopen(file_name, "w"); |
| |
| if (file == NULL) |
| tst_brkm(TBROK | TERRNO, cleanup, |
| "Could not create test file %s.", file_name); |
| |
| /* create file with shebang */ |
| if (flag) { |
| char buf[PATH_MAX]; |
| |
| if (tst_get_path("sh", buf, PATH_MAX)) |
| tst_brkm(TBROK, cleanup, |
| "Could not find path to sh in $PATH."); |
| |
| if (fprintf(file, "#!%s\n", buf) < 0) |
| tst_brkm(TBROK, cleanup, "Calling fprintf failed."); |
| } |
| |
| if (fclose(file)) |
| tst_brkm(TBROK | TERRNO, cleanup, "Calling fclose failed."); |
| |
| if (chmod(file_name, mode)) |
| tst_brkm(TBROK | TERRNO, cleanup, |
| "Could not chmod test file %s.", file_name); |
| |
| if (chown(file_name, user_id, group_id)) |
| tst_brkm(TBROK | TERRNO, cleanup, |
| "Could not chown test file %s.", file_name); |
| } |
| |
| /* |
| * Test permissions. |
| */ |
| static int testfperm(const char *file_name, int flag, int user_id, |
| int group_id, char *fperm) |
| { |
| FILE *file; |
| int status; |
| |
| switch (fork()) { |
| case 0: |
| if (setgid(group_id)) |
| tst_brkm(TBROK | TERRNO, cleanup, |
| "Could not setgid to %d.", group_id); |
| |
| if (setuid(user_id)) |
| tst_brkm(TBROK | TERRNO, cleanup, |
| "Could not setuid to %d.", user_id); |
| |
| switch (tolower(fperm[0])) { |
| case 'x': |
| |
| /* |
| * execlp runs file with sh in case kernel has |
| * no binmft handler for it, execl does not. |
| */ |
| if (flag) |
| execl(file_name, file_name, NULL); |
| else |
| execlp(file_name, "test", NULL); |
| |
| exit(1); |
| break; |
| default: |
| if ((file = fopen(file_name, fperm)) != NULL) { |
| fclose(file); |
| exit(0); |
| } |
| exit(1); |
| break; |
| } |
| break; |
| case -1: |
| tst_brkm(TBROK | TERRNO, cleanup, "fork failed"); |
| break; |
| default: |
| break; |
| } |
| |
| wait(&status); |
| |
| return WEXITSTATUS(status); |
| } |
| |
| static void print_usage(const char *bname) |
| { |
| char *usage = "<file mode> <file UID> <file GID> " |
| "<tester UID> <tester GID> <permission " |
| "to test r|w|x> <expected result 0|1>"; |
| |
| printf("Usage: %s %s\n", bname, usage); |
| } |
| |
| static long str_to_l(const char *str, const char *name, int base) |
| { |
| char *end; |
| long i = strtol(str, &end, base); |
| |
| if (*end != '\0') |
| tst_brkm(TBROK, NULL, "Invalid parameter '%s' passed. (%s)", |
| name, str); |
| |
| return i; |
| } |
| |
| int main(int argc, char *argv[]) |
| { |
| char *fperm; |
| gid_t fgroup_id, group_id; |
| uid_t fuser_id, user_id; |
| mode_t fmode; |
| int exp_res; |
| int res1, res2 = 1; |
| |
| tst_require_root(); |
| |
| if (argc != 8) { |
| print_usage(argv[0]); |
| tst_exit(); |
| } |
| |
| if (strlen(argv[6]) > 1) { |
| print_usage(argv[0]); |
| tst_exit(); |
| } |
| |
| fmode = str_to_l(argv[1], "file mode", 8); |
| fuser_id = str_to_l(argv[2], "file uid", 10); |
| fgroup_id = str_to_l(argv[3], "file gid", 10); |
| user_id = str_to_l(argv[4], "tester uid", 10); |
| group_id = str_to_l(argv[5], "tester gid", 10); |
| fperm = argv[6]; |
| exp_res = str_to_l(argv[7], "expected result", 10); |
| |
| tst_tmpdir(); |
| testsetup(TEST_FILE_NAME1, 0, fmode, fuser_id, fgroup_id); |
| |
| /* more tests for 'x' flag */ |
| if (tolower(fperm[0]) == 'x') { |
| testsetup(TEST_FILE_NAME2, 1, fmode, fuser_id, fgroup_id); |
| res2 = testfperm(TEST_FILE_NAME2, 1, user_id, group_id, fperm); |
| |
| if (res2 == exp_res) |
| res2 = 1; |
| else |
| res2 = 0; |
| } |
| |
| res1 = testfperm(TEST_FILE_NAME1, 0, user_id, group_id, fperm); |
| |
| tst_resm((exp_res == res1) && res2 ? TPASS : TFAIL, |
| "%c a %03o file owned by (%d/%d) as user/group (%d/%d)", |
| fperm[0], fmode, fuser_id, fgroup_id, user_id, group_id); |
| tst_rmdir(); |
| tst_exit(); |
| } |