zdtm:tty:vt: add simple test

Inspired by static/console test.
Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Reviewed-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/zdtm.sh

@@ -107,6 +107,7 @@ static/pty04
 static/tty02
 static/tty03
 static/console
+static/vt
 static/child_opened_proc
 static/cow01
 static/fpu00
@@ -246,6 +247,7 @@ ns/static/clean_mntns
 ns/static/mntns_link_remap
 ns/static/mntns_link_ghost
 ns/static/console
+ns/static/vt
 ns/static/rtc
 ns/static/mntns_shared_bind
 ns/static/mntns_shared_bind02
@@ -292,6 +294,7 @@ tun
 chroot
 chroot-file
 console
+vt
 rtc
 tempfs
 maps007

test/zdtm/.gitignore

@@ -168,6 +168,7 @@
 /live/static/zombie00
 /live/static/ip.dump
 /live/static/ip.rst
+/live/static/vt
 /live/streaming/fifo_dyn
 /live/streaming/fifo_loop
 /live/streaming/file_aio

test/zdtm/live/static/Makefile

@@ -139,6 +139,7 @@ TST_FILE	=				\
 		fifo_ro				\
 		fifo_wronly			\
 		console				\
+		vt				\
 		unlink_fifo			\
 		unlink_fifo_wronly		\
 		unlink_mmap00			\

test/zdtm/live/static/vt.c

+#define _GNU_SOURCE
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include "zdtmtst.h"
+
+const char *test_doc	= "Check c/r of a virtual terminal";
+const char *test_author	= "Ruslan Kuprieiev <kupruser@gmail.com>";
+
+char *filename;
+TEST_OPTION(filename, string, "file name", 1);
+
+int main(int argc, char **argv)
+{
+	struct stat st1, st2;
+	int fd;
+
+	test_init(argc, argv);
+
+	if (mknod(filename, S_IFCHR | S_IRUSR | S_IWUSR, makedev(4, 5))) {
+		err("Can't create virtual terminal %s", filename);
+		return 1;
+	}
+
+	fd = open(filename, O_RDONLY);
+	if (fd < 0) {
+		err("Open virtual terminal %s failed", filename);
+		return 1;
+	}
+
+	if (fstat(fd, &st1)) {
+		err("Can't stat %s virtual terminal", filename);
+		return 1;
+	}
+
+	test_daemon();
+	test_waitsig();
+
+	if (fstat(fd, &st2)) {
+		err("Can't stat %s virtual terminal", filename);
+		return 1;
+	}
+
+	if (st1.st_rdev != st2.st_rdev) {
+		fail("Virtual terminal rdev mismatch %x != %x on %s",
+		     (int)st1.st_rdev, (int)st2.st_rdev,
+		     filename);
+		return 1;
+	}
+
+	pass();
+	return 0;
+}