zdtm: check a case when a slave pty is mounted to somewhere

travis-ci: success for A few fixes to c/r a docker container with a console (rev3)
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

test/zdtm/static/Makefile

@@ -114,6 +114,7 @@ TST_NOFILE	:=				\
 		rlimits00			\
 		pty00				\
 		pty01				\
+		pty-console			\
 		pty02				\
 		pty03				\
 		pty04				\
@@ -452,6 +453,8 @@ socket-tcp6-last-ack:	override CFLAGS += -D ZDTM_TCP_LAST_ACK -D ZDTM_IPV6
 socket-tcp6-closing:	override CFLAGS += -D ZDTM_IPV6
 socket-tcp6-unconn:	override CFLAGS += -D ZDTM_IPV6
 
+pty-console:		override CFLAGS += -D ZDTM_DEV_CONSOLE
+
 $(LIB):	force
 	$(Q) $(MAKE) -C $(LIBDIR)
 

test/zdtm/static/pty-console.c

+pty01.c
\ No newline at end of file

test/zdtm/static/pty-console.desc

+{'flags': 'suid', 'flavor' : 'ns uns'}

test/zdtm/static/pty01.c

@@ -9,6 +9,7 @@
 #include <string.h>
 #include <termios.h>
 #include <signal.h>
+#include <sys/mount.h>
 
 #include "zdtmtst.h"
 
@@ -51,6 +52,19 @@ int main(int argc, char *argv[])
 		return 1;
 	}
 
+#ifdef ZDTM_DEV_CONSOLE
+	{
+		int fd;
+		fd = open("/dev/console", O_CREAT | O_RDONLY, 0755);
+		if (fd < 0)
+			return -1;
+		close(fd);
+
+		if (mount(slavename, "/dev/console", NULL, MS_BIND, NULL))
+			return -1;
+	}
+#endif
+
 	if (fchown(slave1, new_uid, new_gid)) {
 		pr_perror("Can't set uid/gid on %s", slavename);
 		return 1;