| /* |
| * Copyright (c) Wipro Technologies Ltd, 2002. All Rights Reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of version 2 of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it would be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| */ |
| /************************************************************************** |
| * |
| * TEST IDENTIFIER : mount03 |
| * |
| * EXECUTED BY : root / superuser |
| * |
| * TEST TITLE : Test for checking mount(2) flags |
| * |
| * TEST CASE TOTAL : 6 |
| * |
| * AUTHOR : Nirmala Devi Dhanasekar <nirmala.devi@wipro.com> |
| * |
| * SIGNALS |
| * Uses SIGUSR1 to pause before test if option set. |
| * (See the parse_opts(3) man page). |
| * |
| * DESCRIPTION |
| * Check for basic mount(2) system call flags. |
| * |
| * Verify that mount(2) syscall passes for each flag setting and validate |
| * the flags |
| * 1) MS_RDONLY - mount read-only. |
| * 2) MS_NODEV - disallow access to device special files. |
| * 3) MS_NOEXEC - disallow program execution. |
| * 4) MS_SYNCHRONOUS - writes are synced at once. |
| * 5) MS_REMOUNT - alter flags of a mounted FS. |
| * 6) MS_NOSUID - ignore suid and sgid bits. |
| * |
| * Setup: |
| * Setup signal handling. |
| * Create a mount point. |
| * Pause for SIGUSR1 if option specified. |
| * |
| * Test: |
| * Loop if the proper options are given. |
| * Execute mount system call for each flag |
| * Validate each flag setting. if validation fails |
| * Delete the mount point. |
| * Log the errno and Issue a FAIL message. |
| * Delete the mount point. |
| * Otherwise, Issue a PASS message. |
| * |
| * Cleanup: |
| * Print errno log and/or timing stats if options given |
| * Delete the temporary directory(s)/file(s) created. |
| * |
| * USAGE: <for command-line> |
| * mount03 [-T type] -D device [-e] [-i n] [-I x] [-p x] [-t] |
| * where, -T type : specifies the type of filesystem to |
| * be mounted. Default ext2. |
| * -D device : device to be mounted. |
| * -e : Turn on errno logging. |
| * -i n : Execute test n times. |
| * -I x : Execute test for x seconds. |
| * -p : Pause for SIGUSR1 before starting |
| * -P x : Pause for x seconds between iterations. |
| * -t : Turn on syscall timing. |
| * |
| * RESTRICTIONS |
| * test must run with the -D option |
| * test doesn't support -c option to run it in parallel, as mount |
| * syscall is not supposed to run in parallel. |
| *****************************************************************************/ |
| |
| #ifndef _GNU_SOURCE |
| # define _GNU_SOURCE |
| #endif |
| |
| #include <sys/types.h> |
| #include <sys/mount.h> |
| #include <sys/stat.h> |
| #include <sys/wait.h> |
| #include <assert.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <pwd.h> |
| #include <unistd.h> |
| #include "test.h" |
| #include "usctest.h" |
| |
| static void help(void); |
| static void setup(void); |
| static void cleanup(void); |
| static int test_rwflag(int, int); |
| static int setup_uid(void); |
| |
| char *TCID = "mount03"; /* Test program identifier. */ |
| int TST_TOTAL = 6; /* Total number of test cases. */ |
| extern char **environ; /* pointer to this processes env */ |
| |
| #define DEFAULT_FSTYPE "ext2" |
| #define TEMP_FILE "temp_file" |
| #define FILE_MODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH) |
| #define DIR_MODE (S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH) |
| #define SUID_MODE (S_ISUID|S_IRUSR|S_IXUSR|S_IXGRP|S_IXOTH) |
| |
| static char *Fstype; |
| |
| static char mntpoint[20]; |
| static char *fstype; |
| static char *device; |
| static int Tflag = 0; |
| static int Dflag = 0; |
| |
| static char write_buffer[BUFSIZ]; /* buffer used to write data to file */ |
| static char read_buffer[BUFSIZ]; /* buffer used to read data from file */ |
| static int fildes; /* file descriptor for temporary file */ |
| static char *Cmd_buffer[3]; /* Buffer to hold command string */ |
| static char Path_name[PATH_MAX]; /* Buffer to hold command string */ |
| static char testhome_path[PATH_MAX]; /* Test home Path */ |
| static char file[PATH_MAX]; /* Temporary file */ |
| static char cmd[] = "cp"; |
| |
| long rwflags[] = { |
| MS_RDONLY, |
| MS_NODEV, |
| MS_NOEXEC, |
| MS_SYNCHRONOUS, |
| MS_RDONLY, |
| MS_NOSUID, |
| }; |
| |
| static option_t options[] = { /* options supported by mount03 test */ |
| {"T:", &Tflag, &fstype}, /* -T type of filesystem */ |
| {"D:", &Dflag, &device}, /* -D device used for mounting */ |
| {NULL, NULL, NULL} |
| }; |
| |
| int main(int ac, char **av) |
| { |
| int lc, i; /* loop counter */ |
| char *msg; /* message returned from parse_opts */ |
| |
| /* parse standard options */ |
| if ((msg = parse_opts(ac, av, options, &help)) != NULL) |
| tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
| |
| /* Check for mandatory option of the testcase */ |
| if (!Dflag) { |
| tst_brkm(TBROK, NULL, |
| "you must specify the device used for mounting with -D " |
| "option"); |
| } |
| |
| if (Tflag) { |
| Fstype = (char *)malloc(strlen(fstype)+1); |
| if (Fstype == NULL) { |
| tst_brkm(TBROK|TERRNO, NULL, "malloc failed"); |
| } |
| Fstype[strlen(fstype)] = '\0'; |
| strncpy(Fstype, fstype, strlen(fstype)); |
| } else { |
| Fstype = (char *)malloc(strlen(DEFAULT_FSTYPE)+1); |
| if (Fstype == NULL) { |
| tst_brkm(TBROK|TERRNO, NULL, "malloc failed"); |
| } |
| strncpy(Fstype, DEFAULT_FSTYPE, strlen(DEFAULT_FSTYPE)); |
| Fstype[strlen(DEFAULT_FSTYPE)] = '\0'; |
| } |
| |
| if (STD_COPIES != 1) { |
| tst_resm(TINFO, "-c option has no effect for this testcase - " |
| "%s doesn't allow running more than one instance " |
| "at a time", TCID); |
| STD_COPIES = 1; |
| } |
| |
| setup(); |
| |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| |
| Tst_count = 0; |
| |
| for (i = 0; i < TST_TOTAL; ++i) { |
| |
| /* Call mount(2) */ |
| TEST(mount(device, mntpoint, Fstype, rwflags[i], NULL)); |
| |
| /* check return code */ |
| if (TEST_RETURN != 0) { |
| tst_resm(TFAIL|TTERRNO, "mount(2) failed"); |
| continue; |
| } |
| |
| /* Validate the rwflag */ |
| if (test_rwflag(i, lc) == 1) { |
| tst_resm(TFAIL, "mount(2) failed while" |
| " validating %ld", rwflags[i]); |
| } else { |
| tst_resm(TPASS, "mount(2) passed with " |
| "rwflag = %ld", rwflags[i]); |
| } |
| TEST(umount(mntpoint)); |
| if (TEST_RETURN != 0) { |
| tst_brkm(TBROK|TTERRNO, cleanup, |
| "umount(2) failed for %s", mntpoint); |
| } |
| } |
| } |
| |
| /* cleanup and exit */ |
| cleanup(); |
| |
| tst_exit(); |
| } |
| |
| /* |
| * test_rwflag(int i, int cnt) |
| * Validate the mount system call for rwflags. |
| */ |
| |
| int test_rwflag(int i, int cnt) |
| { |
| int fd, pid, status; |
| char nobody_uid[] = "nobody"; |
| struct passwd *ltpuser; |
| |
| switch (i) { |
| case 0: |
| /* Validate MS_RDONLY flag of mount call */ |
| |
| snprintf(file, PATH_MAX, "%stmp", Path_name); |
| if ((fd = open(file, O_CREAT | O_RDWR, S_IRWXU)) == -1) { |
| if (errno == EROFS) { |
| return 0; |
| } else { |
| tst_resm(TWARN|TERRNO, |
| "open didn't fail with EROFS"); |
| return 1; |
| } |
| } |
| close(fd); |
| return 1; |
| case 1: |
| /* Validate MS_NODEV flag of mount call */ |
| |
| snprintf(file, PATH_MAX, "%smynod_%d_%d", Path_name, getpid(), |
| cnt); |
| if (mknod(file, S_IFBLK | 0777, 0) == 0) { |
| if ((fd = open(file, O_RDWR, S_IRWXU)) == -1) { |
| if (errno == EACCES) { |
| return 0; |
| } else { |
| tst_resm(TWARN|TERRNO, |
| "open didn't fail with EACCES"); |
| return 1; |
| } |
| } |
| close(fd); |
| } else { |
| tst_resm(TWARN|TERRNO, "mknod(2) failed to create %s", |
| file); |
| return 1; |
| } |
| return 1; |
| case 2: |
| /* Validate MS_NOEXEC flag of mount call */ |
| |
| snprintf(file, PATH_MAX, "%stmp1", Path_name); |
| if ((fd = open(file, O_CREAT | O_RDWR, S_IRWXU)) == -1) { |
| tst_resm(TWARN|TERRNO, "opening %s failed", file); |
| } else { |
| close(fd); |
| execlp(file, basename(file), NULL); |
| } |
| return 1; |
| case 3: |
| /* |
| * Validate MS_SYNCHRONOUS flag of mount call. |
| * Copy some data into data buffer. |
| */ |
| |
| strcpy(write_buffer, "abcdefghijklmnopqrstuvwxyz"); |
| |
| /* Creat a temporary file under above directory */ |
| snprintf(file, PATH_MAX, "%s%s", Path_name, TEMP_FILE); |
| if ((fildes = open(file, O_RDWR | O_CREAT, FILE_MODE)) |
| == -1) { |
| tst_resm(TWARN|TERRNO, |
| "open(%s, O_RDWR|O_CREAT, %#o) failed", |
| file, FILE_MODE); |
| return 1; |
| } |
| |
| /* Write the buffer data into file */ |
| if (write(fildes, write_buffer, strlen(write_buffer)) != |
| strlen(write_buffer)) { |
| tst_resm(TWARN|TERRNO, "writing to %s failed", file); |
| close(fildes); |
| return 1; |
| } |
| |
| /* Set the file ptr to b'nning of file */ |
| if (lseek(fildes, 0, SEEK_SET) < 0) { |
| tst_resm(TWARN, "lseek() failed on %s, error=" |
| " %d", file, errno); |
| close(fildes); |
| return 1; |
| } |
| |
| /* Read the contents of file */ |
| if (read(fildes, read_buffer, sizeof(read_buffer)) > 0) { |
| if (strcmp(read_buffer, write_buffer)) { |
| tst_resm(TWARN, "Data read from %s and written " |
| "mismatch", file); |
| close(fildes); |
| return 1; |
| } else { |
| close(fildes); |
| return 0; |
| } |
| } else { |
| tst_resm(TWARN|TERRNO, "read() Fails on %s", file); |
| close(fildes); |
| return 1; |
| } |
| |
| case 4: |
| /* Validate MS_REMOUNT flag of mount call */ |
| |
| TEST(mount(device, mntpoint, Fstype, MS_REMOUNT, NULL)); |
| if (TEST_RETURN != 0) { |
| tst_resm(TWARN|TTERRNO, "mount(2) failed to remount"); |
| return 1; |
| } else { |
| snprintf(file, PATH_MAX, "%stmp2", Path_name); |
| if ((fd = open(file, O_CREAT | O_RDWR, S_IRWXU)) |
| == -1) { |
| tst_resm(TWARN, "open(%s) on readonly " |
| "filesystem passed", file); |
| return 1; |
| } else { |
| close(fd); |
| return 0; |
| } |
| } |
| case 5: |
| /* Validate MS_NOSUID flag of mount call */ |
| |
| if (setup_uid() != 0) { |
| tst_resm(TBROK|TERRNO, "setup_uid failed"); |
| return 1; |
| } |
| switch (pid = fork()) { |
| case -1: |
| tst_resm(TBROK|TERRNO, "fork failed"); |
| return 1; |
| case 0: |
| snprintf(file, PATH_MAX, "%ssetuid_test", Path_name); |
| if (chmod(file, SUID_MODE) != 0) { |
| tst_resm(TWARN, "chmod(%s, %#o) failed", |
| file, SUID_MODE); |
| } |
| |
| ltpuser = getpwnam(nobody_uid); |
| if (setreuid(ltpuser->pw_uid, ltpuser->pw_uid) == -1) { |
| tst_resm(TWARN|TERRNO, |
| "seteuid() failed to change euid to %d", |
| ltpuser->pw_uid); |
| } |
| execlp(file, basename(file), NULL); |
| exit(1); |
| default: |
| waitpid(pid, &status, 0); |
| if (WIFEXITED(status)) { |
| /* reset the setup_uid */ |
| if (status) |
| return 0; |
| else |
| return 1; |
| } |
| } |
| } |
| return 0; |
| } |
| |
| /* setup_uid() - performs setup for NOUID test */ |
| int setup_uid() |
| { |
| int pid, status; |
| char command[PATH_MAX]; |
| |
| switch (pid = fork()) { |
| case -1: |
| tst_resm(TWARN|TERRNO, "fork failed"); |
| return 1; |
| case 0: |
| Cmd_buffer[0] = cmd; |
| Cmd_buffer[1] = testhome_path; |
| Cmd_buffer[2] = Path_name; |
| |
| /* Put command into string */ |
| sprintf(command, "%s %s %s", cmd, testhome_path, Path_name); |
| |
| /* Run command to cp file to right spot */ |
| if (system(command) == 0) { |
| execlp(file, basename(file), NULL); |
| } else { |
| printf("call to %s failed\n", command); |
| } |
| exit(1); |
| default: |
| waitpid(pid, &status, 0); |
| if (WIFEXITED(status)) { |
| return WEXITSTATUS(status); |
| } else if (WIFSIGNALED(status)) { |
| return WTERMSIG(status); |
| } else { |
| /* Should be 0. */ |
| assert (status == 0); |
| return 0; |
| } |
| } |
| } |
| |
| /* setup() - performs all ONE TIME setup for this test */ |
| void setup() |
| { |
| char *test_home; /* variable to hold TESTHOME env */ |
| struct stat setuid_test_stat; |
| |
| tst_sig(FORK, DEF_HANDLER, cleanup); |
| |
| /* Check whether we are root */ |
| if (geteuid() != 0) { |
| free(Fstype); |
| tst_brkm(TBROK, NULL, "Test must be run as root"); |
| } |
| |
| /* Test home directory */ |
| test_home = get_current_dir_name(); |
| |
| /* make a temp directory */ |
| tst_tmpdir(); |
| |
| /* Unique mount point */ |
| (void)sprintf(mntpoint, "mnt_%d", getpid()); |
| |
| if (mkdir(mntpoint, DIR_MODE)) { |
| tst_brkm(TBROK|TERRNO, cleanup, "mkdir(%s, %#o) failed", |
| mntpoint, DIR_MODE); |
| } |
| /* Get the current working directory of the process */ |
| if (getcwd(Path_name, sizeof(Path_name)) == NULL) { |
| tst_brkm(TBROK, cleanup, "getcwd failed"); |
| } |
| if (chmod(Path_name, DIR_MODE) != 0) { |
| tst_brkm(TBROK, cleanup, "chmod(%s, %#o) failed", |
| Path_name, DIR_MODE); |
| } |
| snprintf(file, PATH_MAX, "%ssetuid_test", Path_name); |
| if (stat(file, &setuid_test_stat) < 0) { |
| tst_brkm(TBROK, cleanup, "stat for setuid_test failed"); |
| } else { |
| if ((setuid_test_stat.st_uid || setuid_test_stat.st_gid) && |
| chown(file, 0, 0) < 0) { |
| tst_brkm(TBROK, cleanup, |
| "chown for setuid_test failed"); |
| } |
| if (setuid_test_stat.st_mode != SUID_MODE && |
| chmod(file, SUID_MODE) < 0) { |
| tst_brkm(TBROK, cleanup, |
| "setuid for setuid_test failed"); |
| } |
| } |
| |
| /* |
| * under temporary directory |
| */ |
| snprintf(Path_name, PATH_MAX, "%s/%s/", Path_name, mntpoint); |
| |
| strcpy(testhome_path, test_home); |
| strcat(testhome_path, "/setuid_test"); |
| |
| TEST_PAUSE; |
| |
| } |
| |
| /* |
| *cleanup() - performs all ONE TIME cleanup for this test at |
| * completion or premature exit. |
| */ |
| void cleanup() |
| { |
| free(Fstype); |
| |
| /* |
| * print timing stats if that option was specified. |
| * print errno log if that option was specified. |
| */ |
| TEST_CLEANUP; |
| |
| tst_rmdir(); |
| } |
| |
| /* |
| * issue a help message |
| */ |
| void help() |
| { |
| printf("-T type : specifies the type of filesystem to be mounted." |
| " Default ext2. \n"); |
| printf("-D device : device used for mounting \n"); |
| } |