test: add fake_snap.pl for snapshot simulation

The script simulates snapshots by simply copying file data from the base
path to a snapshot path located under .snapshots/@GMT-%Y.%m.%d-%H.%M.%S/

Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>

diff --git a/source3/script/tests/fake_snap.pl b/source3/script/tests/fake_snap.pl
new file mode 100755 (executable)
index 0000000..d1233f3
--- /dev/null
+++ b/source3/script/tests/fake_snap.pl
@@ -0,0 +1,70 @@
+#!/usr/bin/perl -w
+
+use strict;
+
+use File::Path qw(rmtree);
+use POSIX ();
+
+sub _create_snapshot
+{
+       my ($base_path) = @_;
+       my $time_str = POSIX::strftime("%Y.%m.%d-%H.%M.%S" , localtime());
+       my $snap_path = $base_path . "/.snapshots/\@GMT-" . $time_str;
+       my $ret;
+
+       POSIX::mkdir($base_path . "/.snapshots", 0777);
+
+       # add trailing slash to src path to ensure that only contents is copied
+       $ret = system("rsync", "-a", "--exclude=.snapshots/", "${base_path}/",
+                     $snap_path);
+       if ($ret != 0) {
+               print STDERR "rsync failed with $ret\n";
+       } else {
+               print "$snap_path\n";
+       }
+
+       return $ret;
+}
+
+sub _delete_snapshot
+{
+       my ($base_path, $snap_path) = @_;
+
+       # we're doing a recursive delete, so do some sanity checks
+       if ((index($snap_path, $base_path) != 0) || (index($snap_path, ".snapshots") == -1)) {
+               print STDERR "invalid snap_path: $snap_path\n";
+               return -1;
+       }
+
+       rmtree($snap_path, {error => \my $err});
+       if (@$err) {
+               for my $diag (@$err) {
+                       my ($file, $message) = %$diag;
+                       if ($file eq '') {
+                               print STDERR "rmtree error: $message\n";
+                       } else {
+                               print STDERR "rmtree error $file: $message\n";
+                       }
+               }
+               return -1;
+       }
+
+       return 0;
+}
+
+my $ret;
+my $num_args = $#ARGV + 1;
+my $cmd = shift;
+
+if (($num_args == 2) && ($cmd eq "--check")) {
+       $ret = 0;
+} elsif (($num_args == 2) && ($cmd eq "--create")) {
+       $ret = _create_snapshot($ARGV[0]);
+} elsif (($num_args == 3) && ($cmd eq "--delete")) {
+       $ret = _delete_snapshot($ARGV[0], $ARGV[1]);
+} else {
+       print STDERR "invalid script argument\n";
+       $ret = -1;
+}
+
+exit $ret;