holds.py revision d7747cbcf0e2da91e8d0e3dfd6d3ac45da469773
#! /usr/bin/python2.4
#
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# Copyright 2009 Sun Microsystems, Inc. All rights reserved.
# Use is subject to license terms.
#
"""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
gotone = False
t = zfs.table.Table(fields, rjustfields)
for ds in zfs.dataset.snapshots_fromcmdline(args, options.recursive):
gotone = True
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()
elif not gotone:
raise zfs.util.ZFSError(errno.ENOENT, _("no matching datasets"))