test chroot and chdir restoration

One testcase ensures that cwd is restore and chroot is not wrongly set. The second ensure that a container with a child task which is chrooted, when restored, is restored with the child task chrooted.

The third testcase tries to restore a container which was itself chrooted. This fails, as it is up to userspace to make sure that the container is restarted in the right place. One way to do this is with the
restart -r chroot_dir < ckpt
option.

(The third testcase does not by default run)

---
 Makefile             |    2 +-
 runall.sh            |    6 ++
 taskfs/Makefile      |   16 +++++
 taskfs/README        |    1 +
 taskfs/chrootsleep.c |   55 ++++++++++++++++
 taskfs/cwdsleep.c    |   43 +++++++++++++
 taskfs/runtest.sh    |  170 ++++++++++++++++++++++++++++++++++++++++++++++++++
 7 files changed, 292 insertions(+), 1 deletions(-)
 create mode 100644 taskfs/Makefile
 create mode 100644 taskfs/README
 create mode 100644 taskfs/chrootsleep.c
 create mode 100644 taskfs/cwdsleep.c
 create mode 100755 taskfs/runtest.sh

index 3463f31..95f8b6e 100644
@@ -1,5 +1,5 @@
 SUBDIRS = libcrtest counterloop fileio simple userns ipc sleep \
-	  process-tree futex epoll
+	  process-tree futex epoll taskfs
 
 targets = ns_exec mysu
 

index d15dc25..1eddd74 100644
@@ -97,5 +97,11 @@ bash runtests.sh
 update_totals $?
 popd
 
+echo Running cwd/chroot tests
+pushd taskfs
+bash runtest.sh
+update_totals $?
+popd
+
 echo $passed out of $total test groups passed.
 exit 0

new file mode 100644
index 0000000..ab13816
@@ -0,0 +1,16 @@
+targets = cwdsleep chrootsleep
+
+all: $(targets)
+
+SLIBS = ../libcrtest/libcrtest.a
+LIBCMD = -I../libcrtest -L../libcrtest $(SLIBS)
+
+cwdsleep: cwdsleep.c $(SLIBS)
+	gcc -static -o cwdsleep cwdsleep.c $(LIBCMD)
+
+chrootsleep: chrootsleep.c $(SLIBS)
+	gcc -static -o chrootsleep chrootsleep.c $(LIBCMD)
+
+clean:
+	rm -f $(targets)
+	rm -rf cr_taskfs*

new file mode 100644
index 0000000..546b462
@@ -0,0 +1 @@
+test cwd and chroot

1.6.4.4