[LTP] [PATCH 1/2]mount/mount03.c: cleanup

[DAN LI <li.dan@cn.fujitsu.com>]

1. Remove useless comments

2. Revise code to follow ltp-code-style

Signed-off-by: DAN LI <li.dan@cn.fujitsu.com>
---
 testcases/kernel/syscalls/mount/mount03.c | 208 +++++++++++++-----------------
 1 file changed, 89 insertions(+), 119 deletions(-)

diff --git a/testcases/kernel/syscalls/mount/mount03.c b/testcases/kernel/syscalls/mount/mount03.c
index 04570b9..ea4b0e9 100644
--- a/testcases/kernel/syscalls/mount/mount03.c
+++ b/testcases/kernel/syscalls/mount/mount03.c
@@ -14,10 +14,8 @@
  * 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
@@ -26,10 +24,6 @@
  *
  *    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.
  *
@@ -42,13 +36,13 @@
  *	5) MS_REMOUNT - alter flags of a mounted FS.
  *	6) MS_NOSUID - ignore suid and sgid bits.
  *
- * 	Setup:
+ *	Setup:
  *	  Setup signal handling.
  *	  Create a mount point.
  *	  Pause for SIGUSR1 if option specified.
  *
- * 	Test:
- *	 Loop if the proper options are given.
+ *	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.
@@ -56,22 +50,10 @@
  *	  Delete the mount point.
  *	  Otherwise, Issue a PASS message.
  *
- * 	Cleanup:
- * 	  Print errno log and/or timing stats if options given
+ *	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
@@ -102,30 +84,29 @@ static int setup_uid(void);

 char *TCID = "mount03";
 int TST_TOTAL = 6;
-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 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 *fs_type;

 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";
+static int tflag;
+static int dflag;
+
+static char write_buffer[BUFSIZ];
+static char read_buffer[BUFSIZ];
+static int fildes;
+static char path_name[PATH_MAX];
+static char testhome_path[PATH_MAX];
+static char file[PATH_MAX];
+static char *cmd = "cp";

 long rwflags[] = {
 	MS_RDONLY,
@@ -136,41 +117,41 @@ long rwflags[] = {
 	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  */
+static option_t options[] = {
+	{"T:", &tflag, &fstype},
+	{"D:", &dflag, &device},
 	{NULL, NULL, NULL}
 };

-int main(int ac, char **av)
+int main(int argc, char *argv[])
 {
 	int lc, i;
 	char *msg;

-	if ((msg = parse_opts(ac, av, options, &help)) != NULL)
+	msg = parse_opts(argc, argv, options, &help);
+	if (msg != NULL)
 		tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);

 	/* Check for mandatory option of the testcase */
-	if (!Dflag) {
+	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) {
+	if (tflag) {
+		fs_type = (char *)malloc(strlen(fstype) + 1);
+		if (fs_type == NULL)
 			tst_brkm(TBROK | TERRNO, NULL, "malloc failed");
-		}
-		Fstype[strlen(fstype)] = '\0';
-		strncpy(Fstype, fstype, strlen(fstype));
+
+		fs_type[strlen(fstype)] = '\0';
+		strncpy(fs_type, fstype, strlen(fstype));
 	} else {
-		Fstype = (char *)malloc(strlen(DEFAULT_FSTYPE) + 1);
-		if (Fstype == NULL) {
+		fs_type = (char *)malloc(strlen(DEFAULT_FSTYPE) + 1);
+		if (fs_type == NULL)
 			tst_brkm(TBROK | TERRNO, NULL, "malloc failed");
-		}
-		strncpy(Fstype, DEFAULT_FSTYPE, strlen(DEFAULT_FSTYPE));
-		Fstype[strlen(DEFAULT_FSTYPE)] = '\0';
+
+		strncpy(fs_type, DEFAULT_FSTYPE, strlen(DEFAULT_FSTYPE));
+		fs_type[strlen(DEFAULT_FSTYPE)] = '\0';
 	}

 	if (STD_COPIES != 1) {
@@ -189,7 +170,8 @@ int main(int ac, char **av)
 		for (i = 0; i < TST_TOTAL; ++i) {

 			/* Call mount(2) */
-			TEST(mount(device, mntpoint, Fstype, rwflags[i], NULL));
+			TEST(mount(device, mntpoint, fs_type,
+						rwflags[i], NULL));

 			/* check return code */
 			if (TEST_RETURN != 0) {
@@ -198,22 +180,20 @@ int main(int ac, char **av)
 			}

 			/* Validate the rwflag */
-			if (test_rwflag(i, lc) == 1) {
+			if (test_rwflag(i, lc) == 1)
 				tst_resm(TFAIL, "mount(2) failed while"
 					 " validating %ld", rwflags[i]);
-			} else {
+			else
 				tst_resm(TPASS, "mount(2) passed with "
 					 "rwflag = %ld", rwflags[i]);
-			}
+
 			TEST(umount(mntpoint));
-			if (TEST_RETURN != 0) {
+			if (TEST_RETURN != 0)
 				tst_brkm(TBROK | TTERRNO, cleanup,
 					 "umount(2) failed for %s", mntpoint);
-			}
 		}
 	}

-	/* cleanup and exit */
 	cleanup();

 	tst_exit();
@@ -234,8 +214,9 @@ int test_rwflag(int i, int cnt)
 	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) {
+		snprintf(file, PATH_MAX, "%stmp", path_name);
+		fd = open(file, O_CREAT | O_RDWR, S_IRWXU);
+		if (fd == -1) {
 			if (errno == EROFS) {
 				return 0;
 			} else {
@@ -249,10 +230,11 @@ int test_rwflag(int i, int cnt)
 	case 1:
 		/* Validate MS_NODEV flag of mount call */

-		snprintf(file, PATH_MAX, "%smynod_%d_%d", Path_name, getpid(),
+		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) {
+			fd = open(file, O_RDWR, S_IRWXU);
+			if (fd == -1) {
 				if (errno == EACCES) {
 					return 0;
 				} else {
@@ -271,8 +253,9 @@ int test_rwflag(int i, int cnt)
 	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) {
+		snprintf(file, PATH_MAX, "%stmp1", path_name);
+		fd = open(file, O_CREAT | O_RDWR, S_IRWXU);
+		if (fd == -1) {
 			tst_resm(TWARN | TERRNO, "opening %s failed", file);
 		} else {
 			close(fd);
@@ -288,9 +271,9 @@ int test_rwflag(int i, int cnt)
 		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) {
+		snprintf(file, PATH_MAX, "%s%s", path_name, TEMP_FILE);
+		fildes = open(file, O_RDWR | O_CREAT, FILE_MODE);
+		if (fildes == -1) {
 			tst_resm(TWARN | TERRNO,
 				 "open(%s, O_RDWR|O_CREAT, %#o) failed",
 				 file, FILE_MODE);
@@ -333,14 +316,14 @@ int test_rwflag(int i, int cnt)
 	case 4:
 		/* Validate MS_REMOUNT flag of mount call */

-		TEST(mount(device, mntpoint, Fstype, MS_REMOUNT, NULL));
+		TEST(mount(device, mntpoint, fs_type, 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) {
+			snprintf(file, PATH_MAX, "%stmp2", path_name);
+			fd = open(file, O_CREAT | O_RDWR, S_IRWXU);
+			if (fd == -1) {
 				tst_resm(TWARN, "open(%s) on readonly "
 					 "filesystem passed", file);
 				return 1;
@@ -356,23 +339,23 @@ int test_rwflag(int i, int cnt)
 			tst_resm(TBROK | TERRNO, "setup_uid failed");
 			return 1;
 		}
-		switch (pid = fork()) {
+		pid = fork();
+		switch (pid) {
 		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) {
+			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) {
+			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:
@@ -395,24 +378,21 @@ int setup_uid()
 	int pid, status;
 	char command[PATH_MAX];

-	switch (pid = fork()) {
+	pid = fork();
+	switch (pid) {
 	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);
+		sprintf(command, "%s %s %s", cmd, testhome_path, path_name);

 		/* Run command to cp file to right spot */
-		if (system(command) == 0) {
+		if (system(command) == 0)
 			execlp(file, basename(file), NULL);
-		} else {
+		else
 			printf("call to %s failed\n", command);
-		}
+
 		exit(1);
 	default:
 		waitpid(pid, &status, 0);
@@ -428,17 +408,16 @@ int setup_uid()
 	}
 }

-/* setup() - performs all ONE TIME setup for this test */
 void setup()
 {
-	char *test_home;	/* variable to hold TESTHOME env */
+	char *test_home;
 	struct stat setuid_test_stat;

 	tst_sig(FORK, DEF_HANDLER, cleanup);

 	/* Check whether we are root */
 	if (geteuid() != 0) {
-		free(Fstype);
+		free(fs_type);
 		tst_brkm(TBROK, NULL, "Test must be run as root");
 	}

@@ -451,38 +430,37 @@ void setup()
 	/* Unique mount point */
 	(void)sprintf(mntpoint, "mnt_%d", getpid());

-	if (mkdir(mntpoint, DIR_MODE)) {
+	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) {
+	if (getcwd(path_name, sizeof(path_name)) == NULL)
 		tst_brkm(TBROK, cleanup, "getcwd failed");
-	}
-	if (chmod(Path_name, DIR_MODE) != 0) {
+
+	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);
+			 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) {
+		    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) {
+		    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);
+	snprintf(path_name, PATH_MAX, "%s/%s/", path_name, mntpoint);

 	strcpy(testhome_path, test_home);
 	strcat(testhome_path, "/setuid_test");
@@ -491,18 +469,10 @@ void setup()

 }

-/*
- *cleanup() -  performs all ONE TIME cleanup for this test at
- *		completion or premature exit.
- */
 void cleanup()
 {
-	free(Fstype);
+	free(fs_type);

-	/*
-	 * print timing stats if that option was specified.
-	 * print errno log if that option was specified.
-	 */
 	TEST_CLEANUP;

 	tst_rmdir();
@@ -514,6 +484,6 @@ void cleanup()
 void help()
 {
 	printf("-T type	  : specifies the type of filesystem to be mounted."
-	       " Default ext2. \n");
-	printf("-D device : device used for mounting \n");
+	       "Default ext2.\n");
+	printf("-D device : device used for mounting\n");
 }
-- 
1.8.3

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