test: thread_different_uid_gid -- Style nitpicking

CC: Vitaly Ostrosablin <vostrosablin@virtuozzo.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>

test/zdtm/static/thread_different_uid_gid.c

@@ -30,43 +30,48 @@ int done = 0;
 
 void *chg_uid_gid(void *arg)
 {
-	int ret;
-	cap_t mycaps;
 	cap_t newcaps;
+	cap_t mycaps;
+	int ret;
+
 	test_msg("Aux thread runs as UID: %d; GID: %d\n", getuid(), getgid());
+
 	newcaps = cap_from_text("cap_setgid,cap_setuid=+eip");
-	if (!newcaps)
-	{
+	if (!newcaps) {
 		pr_perror("Failed to get capability struct\n");
 		exit(1);
 	}
+
 	ret = cap_set_proc(newcaps);
 	if (ret) {
 		pr_perror("Failed to set capabilities for the process\n");
 		exit(1);
 	}
+
 	mycaps = cap_get_proc();
 	if (!mycaps) {
 		pr_perror("Failed to get child thread capabilities\n");
 		exit_group(2);
 	}
+
 	test_msg("Child capabilities: %s\n", cap_to_text(mycaps, NULL));
 	test_msg("Changing UID/GID in child thread to %d:%d\n", uid, gid);
+
 	ret = syscall(SYS_setresgid, gid, gid, gid);
 	if (ret >= 0) {
 		syscall(SYS_setresuid, uid, uid, uid);
-	}
-	if (ret < 0) {
+	} else if (ret < 0) {
 		pr_perror("Failed to change UID/GID\n");
 		exit_group(2);
 	}
+
 	gid = getgid();
 	uid = getuid();
 	test_msg("Now aux thread runs as UID: %d; GID: %d\n", uid, gid);
+
 	test_msg("Child thread is waiting for main thread's signal\n");
 	pthread_mutex_lock(&mutex);
-	while (!done)
-	{
+	while (!done) {
 		pthread_cond_wait(&cond, &mutex);
 	}
 	pthread_mutex_unlock(&mutex);
@@ -77,13 +82,13 @@ void *chg_uid_gid(void *arg)
 
 int main(int argc, char **argv)
 {
-
-	int ret;
-	cap_t newcaps;
 	pthread_t diff_cred_thread;
-	test_init(argc, argv);
+	cap_t newcaps;
 	int maingroup;
 	int mainuser;
+	int ret;
+
+	test_init(argc, argv);
 
 	if (getuid() != 0) {
 		fail("Test is expected to be run with root privileges\n");
@@ -94,9 +99,9 @@ int main(int argc, char **argv)
 	test_msg("Test daemonized\n");
 
 	test_msg("Acquiring CAP_SETGID and CAP_SETUID...\n");
+
 	newcaps = cap_from_text("cap_setgid,cap_setuid=+eip");
-	if (!newcaps)
-	{
+	if (!newcaps) {
 		pr_perror("Failed to get capability struct\n");
 		exit(1);
 	}
@@ -119,13 +124,14 @@ int main(int argc, char **argv)
 
 	test_msg("Creating thread with different UID/GID\n");
 	ret = pthread_create(&diff_cred_thread, NULL, &chg_uid_gid, NULL);
+
 	sleep(5);
+
 	test_msg("Relinquishing root privileges\n");
 	ret = syscall(SYS_setresgid, maingroup, maingroup, maingroup);
 	if (ret >= 0) {
 		ret = syscall(SYS_setresuid, mainuser, mainuser, mainuser);
-	}
-	if (ret < 0) {
+	} else if (ret < 0) {
 		pr_perror("Failed to drop privileges\n");
 		exit(1);
 	}
@@ -142,12 +148,15 @@ int main(int argc, char **argv)
 		pr_perror("Thread credentials match after restore\n");
 		exit(1);
 	}
+
 	pthread_mutex_lock(&mutex);
 	done = 1;
 	pthread_cond_signal(&cond);
 	pthread_mutex_unlock(&mutex);
 	pthread_join(diff_cred_thread, NULL);
 	test_msg("Threads joined\n");
+
 	pass();
+
 	return 0;
 }