#! /usr/bin/python2.4

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# Copyright 2009 Sun Microsystems, Inc.  All rights reserved.

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"""This module implements the "zfs holds" subcommand.

The only public interface is the zfs.holds.do_holds() function."""

import optparse

import sys

import errno

import time

import zfs.util

import zfs.dataset

import zfs.table

_ = zfs.util._

def do_holds():

	"""Implements the "zfs holds" subcommand."""

	def usage(msg=None):

		parser.print_help()

		if msg:

			print

			parser.exit("zfs: error: " + msg)

		else:

			parser.exit()

	u = _("""holds [-r] <snapshot> ...""")

	parser = optparse.OptionParser(usage=u, prog="zfs")

	parser.add_option("-r", action="store_true", dest="recursive",

	    help=_("list holds recursively"))

	(options, args) = parser.parse_args(sys.argv[2:])

	if len(args) < 1:

		usage(_("missing snapshot argument"))

	fields = ("name", "tag", "timestamp")

	rjustfields = ()

	printing = False 

	t = zfs.table.Table(fields, rjustfields) 

	for ds in zfs.dataset.snapshots_fromcmdline(args, options.recursive):

		for tag, tm in ds.get_holds().iteritems():

			val = {"name": ds.name, "tag": tag,

			    "timestamp": time.ctime(tm)}

			t.addline(ds.name, val)

			printing = True

	if printing:

		t.printme()