/usr/lib/rosbag/savemsg.py is in python-rosbag 1.11.16-3.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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from __future__ import print_function
import optparse
import sys
import roslib.message
import rosbag
if __name__ == '__main__':
parser = optparse.OptionParser(usage='usage: savemsg.py [-b <bagfile] type')
parser.add_option('-b', '--bagfiles', action='store', dest='bagfile', default=None, help='Save message from a bagfile rather than system definition')
(options, args) = parser.parse_args()
if len(args) < 1:
parser.error('Message type not specified.')
if options.bagfile is None:
sys_class = roslib.message.get_message_class(args[0])
if sys_class is None:
print('Could not find message %s.' % args[0], file=sys.stderr)
else:
print('[%s]:' % args[0])
print(sys_class._full_text)
else:
for topic, msg, t in rosbag.Bag(options.bagfile).read_messages(raw=True):
if msg[0] == args[0]:
print('[%s]:' % args[0])
print(msg[4]._full_text)
exit(0)
print('Could not find message %s in bag %s.' % (args[0], options.bagfile), file=sys.stderr)
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