1 files changed, 15 insertions, 0 deletions
diff --git a/support/mapto b/support/mapto
new file mode 100755
index 0000000..9588752
--- /dev/null
+++ b/support/mapto
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+#!/usr/bin/env perl
+# This helper script makes it easy to use a passwd or group file to map
+# values in a LOCAL transfer.  For instance, if you mount a backup that
+# does not have the same passwd setup as the local machine, you can do
+# a copy TO the backup area as follows and get the differing ID values
+# mapped just like a remote transfer TO the backed-up machine would do:
+#
+# rsync -av --usermap=`mapto /mnt/backup/etc/passwd` \
+#           --groupmap=`mapto /mnt/backup/etc/group` \
+#           /some/src/ /mnt/backup/some/dest/
+
+while (<>) {
+    push @_, "$1:$2" if /^(\w+):[^:]+:(\d+)/;
+}
+print join(',', @_), "\n";