selftest: check file readability in shadow_copy2 test

Add tests which verify that a snapshot file is readable
if and only if it its metadata can be retrieved. Also
verify (in most tests) that file is retrieved from the
correct snapshot.

Together with the existing test for number of previous
versions we can stat, this test checks that we can read
those files, and also that we cannot break out of a snapshot
if wide links are not allowed.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=12172

Signed-off-by: Uri Simchoni <uri@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
(cherry picked from commit 495b8177363bf1930f3afb373ad73caac022f353)

diff --git a/source3/script/tests/test_shadow_copy.sh b/source3/script/tests/test_shadow_copy.sh
index f5a1444b4fe2acb9e54bc68e39721afd34b58c7c..8b7e4c754b49a8dfa00112719aad812dbef07d20 100755 (executable)
--- a/source3/script/tests/test_shadow_copy.sh
+++ b/source3/script/tests/test_shadow_copy.sh
@@ -129,18 +129,48 @@ test_count_versions()
     local share
     local path
     local expected_count
+    local skip_content
     local versions
+    local tstamps
+    local tstamp
+    local content
 
     share=$1
     path=$2
     expected_count=$3
+    skip_content=$4
     versions=`$SMBCLIENT -U$USERNAME%$PASSWORD "//$SERVER/$share" -I $SERVER_IP -c "allinfo $path" | grep "^create_time:" | wc -l`
-    if [ "$versions" = "$expected_count" ] ; then
-        true
-    else
+    if [ "$versions" != "$expected_count" ] ; then
         echo "expected $expected_count versions of $path, got $versions"
-        false
+        return 1
     fi
+
+    #readable snapshots
+    tstamps=`$SMBCLIENT -U$USERNAME%$PASSWORD "//$SERVER/$share" -I $SERVER_IP -c "allinfo $path" | awk '/^@GMT-/ {snapshot=$1} /^create_time:/ {printf "%s\n", snapshot}'`
+    for tstamp in $tstamps ; do
+        if ! $SMBCLIENT -U$USERNAME%$PASSWORD "//$SERVER/$share" -I $SERVER_IP -c "get $tstamp\\$path $WORKDIR/foo" ; then
+            echo "Failed getting \\\\$SERVER\\$share\\$tstamp\\$path"
+            return 1
+        fi
+        #also check the content, but not for wide links
+        if [ "x$skip_content" != "x1" ] ; then
+            content=`cat $WORKDIR/foo`
+            if [ "$content" != "$tstamp" ] ; then
+                echo "incorrect content of \\\\$SERVER\\$share\\$tstamp\\$path expected [$tstamp]  got [$content]"
+                return 1
+            fi
+        fi
+    done
+
+    #non-readable snapshots
+    tstamps=`$SMBCLIENT -U$USERNAME%$PASSWORD "//$SERVER/$share" -I $SERVER_IP -c "allinfo $path" | \
+        awk '/^@GMT-/ {if (snapshot!=""){printf "%s\n", snapshot} ; snapshot=$1} /^create_time:/ {snapshot=""} END {if (snapshot!=""){printf "%s\n", snapshot}}'`
+    for tstamp in $tstamps ; do
+        if $SMBCLIENT -U$USERNAME%$PASSWORD "//$SERVER/$share" -I $SERVER_IP -c "get $tstamp\\$path $WORKDIR/foo" ; then
+            echo "Unexpected success getting \\\\$SERVER\\$share\\$tstamp\\$path"
+            return 1
+        fi
+    done
 }
 
 # Test fetching a previous version of a file
@@ -196,11 +226,11 @@ test_shadow_copy_fixed()
         failed=`expr $failed + 1`
 
     testit "$msg - abs symlink outside" \
-        test_count_versions $share bar/letcpasswd $ncopies_blocked || \
+        test_count_versions $share bar/letcpasswd $ncopies_blocked  1 || \
         failed=`expr $failed + 1`
 
     testit "$msg - rel symlink outside" \
-        test_count_versions $share bar/loutside $ncopies_blocked || \
+        test_count_versions $share bar/loutside $ncopies_blocked 1 || \
         failed=`expr $failed + 1`
 }