zdtm: execite test cases from a test user

Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/zdtm.sh

@@ -131,6 +131,21 @@ static/sigpending
 static/sk-netlink
 "
 
+TEST_SUID_LIST="
+pid00
+caps00
+maps01
+groups
+sched_prio00
+sched_policy00
+sock_opts00
+sock_opts01
+cmdlinenv00
+packet_sock
+fanotify00
+sk-netlink
+"
+
 CRTOOLS=$(readlink -f `dirname $0`/../crtools)
 CRTOOLS_CPT=$CRTOOLS
 TMP_TREE=""
@@ -216,6 +231,15 @@ start_test()
 	killall -9 $tname > /dev/null 2>&1
 	make -C $tdir $tname.cleanout
 
+	unset ZDTM_UID
+	unset ZDTM_GID
+
+	echo $TEST_SUID_LIST | grep $tname || {
+		export ZDTM_UID=18943
+		export ZDTM_GID=58467
+		chown $ZDTM_UID:$ZDTM_GID $tdir
+	}
+
 	if [ -z "$PIDNS" ]; then
 		make -C $tdir $tname.pid
 		PID=`cat $test.pid` || return 1

test/zdtm/lib/ns.c

@@ -72,6 +72,7 @@ static int prepare_mntns()
 			fprintf(stderr, "mknod(/dev/ptmx) failed: %m\n");
 			return -1;
 		}
+		chmod("/dev/ptmx", 0666);
 		if (mkdir("/dev/pts", 0755) && errno != EEXIST) {
 			fprintf(stderr, "mkdir(/dev/pts) failed: %m\n");
 			return -1;
@@ -88,6 +89,7 @@ static int prepare_mntns()
 
 	mkdir("/dev", 0777);
 	mknod("/dev/null", 0777 | S_IFCHR, makedev(1, 3));
+	chmod("/dev/null", 0777);
 	return 0;
 }
 

test/zdtm/lib/test.c

@@ -126,6 +126,18 @@ void test_init(int argc, char **argv)
 		exit(1);
 	}
 
+	val = getenv("ZDTM_GID");
+	if (val && (setgid(atoi(val)) == -1)) {
+		fprintf(stderr, "Can't set gid: %m");
+		exit(1);
+	}
+
+	val = getenv("ZDTM_UID");
+	if (val && (setuid(atoi(val)) == -1)) {
+		fprintf(stderr, "Can't set gid: %m");
+		exit(1);
+	}
+
 	if (sigaction(SIGTERM, &sa, NULL)) {
 		fprintf(stderr, "Can't set SIGTERM handler: %m\n");
 		exit(1);

test/zdtm/live/static/Makefile

@@ -248,7 +248,7 @@ cleanout:
 	$(RM) -f -r *.pid *.out* *.test* *.state
 
 %.cleanout: %
-	$(RM) -f -r $<.pid $<.out* $<.test* $<.*.test $<.state
+	$(RM) -f -r $<.pid $<.out* *$<.test* $<.*.test $<.state
 
 realclean:	cleandep cleanout
 

test/zdtm/live/static/file_fown.c

@@ -108,7 +108,7 @@ int main(int argc, char *argv[])
 		exit(1);
 	}
 
-	if (setresuid(-1, 1, -1)) {
+	if (!getuid() && setresuid(-1, 1, -1)) {
 		fail("setresuid failed\n");
 		exit(1);
 	}

test/zdtm/live/static/unlink_fstat00.c

@@ -58,14 +58,21 @@ int main(int argc, char ** argv)
 		mode = (fst.st_mode | S_IXOTH);
 	else
 		mode = (fst.st_mode ^ S_IXOTH);
+
 	if (fchmod(fd, mode) < 0) {
 		err("can't chmod %s: %m\n", filename);
 		goto failed;
 	}
-	/* Change uid, gid */
-	if (fchown(fd, (uid = fst.st_uid + 1), (gid = fst.st_gid + 1)) < 0) {
-		err("can't chown %s: %m\n", filename);
-		goto failed;
+
+	if (getuid()) {
+		uid = getuid();
+		gid = getgid();
+	} else {
+		/* Change uid, gid */
+		if (fchown(fd, (uid = fst.st_uid + 1), (gid = fst.st_gid + 1)) < 0) {
+			err("can't chown %s: %m\n", filename);
+			goto failed;
+		}
 	}
 
 	if (lseek(fd, 0, SEEK_SET) != 0) {