[CRIU] [PATCH 15/15] test: pty05 -- Add testing of multiple devpts instance

[Cyrill Gorcunov]

Signed-off-by: Cyrill Gorcunov <gorcunov at openvz.org>
---
 test/zdtm/static/Makefile   |   1 +
 test/zdtm/static/pty05.c    | 183 ++++++++++++++++++++++++++++++++++++
 test/zdtm/static/pty05.desc |   1 +
 3 files changed, 185 insertions(+)
 create mode 100644 test/zdtm/static/pty05.c
 create mode 100644 test/zdtm/static/pty05.desc

diff --git a/test/zdtm/static/Makefile b/test/zdtm/static/Makefile
index fe67747db954..416c3d2bb11c 100644
--- a/test/zdtm/static/Makefile
+++ b/test/zdtm/static/Makefile
@@ -340,6 +340,7 @@ TST_DIR		=				\
 		shared_slave_mount_children	\
 		non_uniform_share_propagation	\
 		private_bind_propagation	\
+		pty05				\
 
 TST_DIR_FILE	=				\
 		chroot				\
diff --git a/test/zdtm/static/pty05.c b/test/zdtm/static/pty05.c
new file mode 100644
index 000000000000..f900e559f204
--- /dev/null
+++ b/test/zdtm/static/pty05.c
@@ -0,0 +1,183 @@
+#define _XOPEN_SOURCE 500
+
+#include <termios.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <signal.h>
+#include <limits.h>
+#include <fcntl.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/mount.h>
+
+#include "zdtmtst.h"
+
+const char *test_doc	= "Test multiple PTYs with different session leaders";
+const char *test_author	= "Cyrill Gorcunov <gorcunov at openvz.org>";
+
+char *dirname;
+TEST_OPTION(dirname, string, "directory name", 1);
+
+static int pty_get_index(int fd)
+{
+	int index;
+
+	if (ioctl(fd, TIOCGPTN, &index)) {
+		pr_perror("Can't fetch ptmx index");
+		return -1;
+	}
+
+	return index;
+}
+
+static int open_pty_pair(char *dir, int *fdm, int *fds)
+{
+	char path[PATH_MAX];
+	int index;
+
+	snprintf(path, sizeof(path), "%s/ptmx", dir);
+	*fdm = open(path, O_RDWR);
+	if (*fdm < 0) {
+		pr_perror("Can't open %s", path);
+		return -1;
+	}
+
+	grantpt(*fdm);
+	unlockpt(*fdm);
+
+	index = pty_get_index(*fdm);
+	if (index < 0) {
+		close(*fdm);
+		return -1;
+	}
+
+	snprintf(path, sizeof(path), "%s/%d", dir, index);
+	*fds = open(path, O_RDWR);
+	if (*fds < 0) {
+		pr_perror("Can't open %s\n", path);
+		close(*fdm);
+		return -1;
+	}
+
+	test_msg("Created pair %d/%d index %d\n", *fdm, *fds, index);
+	return 0;
+}
+
+int main(int argc, char *argv[])
+{
+	char path[PATH_MAX], *dir1, *dir2;
+	struct peer_s {
+		char	*str;
+		int	size;
+		int	fdm;
+		int	fds;
+	} peers[2] = {
+		{ .str = "hello1\n", .size = 7, },
+		{ .str = "hello2\n", .size = 7, } };
+	int ret, retval = 1, i;
+	char buf[64];
+
+	test_init(argc, argv);
+
+	if (mkdir(dirname, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH)) {
+		pr_perror("Can't create testing directory %s", dirname);
+		exit(1);
+	}
+
+	snprintf(path, sizeof(path), "%s/%s", dirname, "lvl1");
+	dir1 = strdup(path);
+
+	if (!dir1 || mkdir(path, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH)) {
+		pr_perror("Can't create testing directory %s", path);
+		exit(1);
+	}
+	test_msg("Mounting first devpts at %s\n", dir1);
+	if (mount("devpts", path, "devpts", 0, "newinstance,ptmxmode=0666")) {
+		pr_perror("Can't mount testing directory %s", path);
+		exit(1);
+	}
+
+	snprintf(path, sizeof(path), "%s/%s", dirname, "lvl2");
+	dir2 = strdup(path);
+	if (!dir2 || mkdir(path, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH)) {
+		umount2(dir1, MNT_DETACH);
+		pr_perror("Can't create testing directory %s", path);
+		exit(1);
+	}
+	test_msg("Mounting second devpts at %s\n", dir2);
+	if (mount("devpts", path, "devpts", 0, "newinstance,ptmxmode=0666")) {
+		umount2(dir1, MNT_DETACH);
+		pr_perror("Can't mount testing directory %s", path);
+		exit(1);
+	}
+
+	if (open_pty_pair(dir1, &peers[0].fdm, &peers[0].fds) ||
+	    open_pty_pair(dir2, &peers[1].fdm, &peers[1].fds)) {
+		umount2(dir1, MNT_DETACH);
+		umount2(dir2, MNT_DETACH);
+		exit(1);
+	}
+
+	for (i = 0; i < ARRAY_SIZE(peers); i++) {
+		test_msg("Writting %d bytes into fds %d\n", peers[i].size, peers[i].fds);
+		ret = write(peers[i].fds, peers[i].str, peers[i].size);
+		if (ret != peers[i].size) {
+			pr_perror("Can't write into fds %d, "
+				  "%d bytes but %d expected",
+				  peers[i].fds, ret, peers[i].size);
+			exit(1);
+		}
+	}
+
+	test_daemon();
+	test_waitsig();
+
+	signal(SIGHUP, SIG_IGN);
+
+	for (i = 0; i < ARRAY_SIZE(peers); i++) {
+		memset(buf, 0, sizeof(buf));
+		test_msg("Reading %d bytes from fdm %d\n", peers[i].size, peers[i].fdm);
+		ret = read(peers[i].fdm, buf, peers[i].size);
+		if (ret != peers[i].size) {
+			fail("Can't read from fdm %d, "
+			     "got %d bytes but %d expected",
+			     peers[i].fdm, ret, peers[i].size);
+			goto out;
+		}
+
+		if (strncmp(buf, peers[i].str, peers[i].size - 1)) {
+			fail("Data mismatch on fdm %d (got %s but %s expected)",
+			     peers[i].fdm, buf, peers[i].str);
+			goto out;
+		}
+	}
+
+	retval = 0;
+out:
+	for (i = 0; i < ARRAY_SIZE(peers); i++) {
+		close(peers[i].fds);
+		close(peers[i].fdm);
+	}
+
+	if (umount2(dir1, MNT_DETACH))
+		pr_perror("Can't unmount %s\n", dir1);
+	if (umount2(dir2, MNT_DETACH))
+		pr_perror("Can't unmount %s\n", dir2);
+	if (rmdir(dir1))
+		pr_perror("Can't remove %s", dir1);
+	if (rmdir(dir2))
+		pr_perror("Can't remove %s", dir2);
+	if (rmdir(dirname))
+		pr_perror("Can't remove %s", dirname);
+
+	free(dir1);
+	free(dir2);
+
+	if (retval == 0)
+		pass();
+
+	return retval;
+}
diff --git a/test/zdtm/static/pty05.desc b/test/zdtm/static/pty05.desc
new file mode 100644
index 000000000000..3fd8e03f7ed7
--- /dev/null
+++ b/test/zdtm/static/pty05.desc
@@ -0,0 +1 @@
+{'flavor': 'ns', 'flags': 'suid', 'feature': 'mnt_id'}
-- 
2.17.1