From 28e02ede59c9edf5e806985df9f05a3344945d7f Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 18:15:01 +0200 Subject: Merging upstream version 3.3.0. Signed-off-by: Daniel Baumann --- support/idmap | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100755 support/idmap (limited to 'support/idmap') diff --git a/support/idmap b/support/idmap new file mode 100755 index 0000000..b212aaf --- /dev/null +++ b/support/idmap @@ -0,0 +1,45 @@ +#!/usr/bin/env python3 +# 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/from the +# backup area as follows and get the differing ID values mapped just like a +# remote transfer to/from the backed-up machine would do: +# +# rsync -av --usermap=`idmap --to /mnt/backup/etc/passwd` \ +# --groupmap=`idmap --to /mnt/backup/etc/group` \ +# /some/src/ /mnt/backup/some/dest/ +# +# rsync -av --usermap=`idmap --from /mnt/backup/etc/passwd` \ +# --groupmap=`idmap --from /mnt/backup/etc/group` \ +# /mnt/backup/some/src/ /some/dest/ + +import re, fileinput, argparse + +NAME_ID_RE = re.compile(r'^(\w+):[^:]+:(\d+)') + +def main(): + maps = [ ] + for line in fileinput.input(args.files): + m = NAME_ID_RE.match(line) + if not m: + continue + if args.to: + pair = (m[1], m[2]) + else: + pair = (m[2], m[1]) + maps.append(':'.join(pair)) + print(','.join(maps)) + + +if __name__ == '__main__': + parser = argparse.ArgumentParser(description="Output usermap or groupmap args for rsync.", add_help=False) + action = parser.add_argument_group() + action = parser.add_mutually_exclusive_group(required=True) + action.add_argument("--from", action="store_true", help="Output the map for use on the sending side.") + action.add_argument("--to", action="store_true", help="Output the map for use on the receiving side.") + parser.add_argument("--help", "-h", action="help", help="Output this help message and exit.") + parser.add_argument("files", metavar="FILE", default='-', nargs='*', help="The file(s) that hold the name & id pairs. Defaults to stdin.") + args = parser.parse_args() + main() + +# vim: sw=4 et -- cgit v1.2.3