/usr/share/dhelp/maint-scripts/info.sh is in dhelp 0.6.21+nmu6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 | # Information retrieval/display functions for Debian maintainer scripts.
# Copyright (C) 2012 Georgios M. Zarkadas <gz@member.fsf.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public
# License along with this program; if not, write to the Free
# Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
# MA 02111-1307 USA.
#
# This file is intended to be sourced by maintainer scripts.
# Return success if package is installed.
#
is_pkg_installed ()
{
LC_ALL=C dpkg --status ${1} 2>/dev/null \
| grep --quiet '^Status: install ok installed' 2>/dev/null
return $?
}
# Return the package version.
#
get_pkg_version ()
{
echo $(LC_ALL=C dpkg --status ${1} 2>/dev/null \
| grep '^Version:' 2>/dev/null \
| cut --fields=2 --delimiter=' ' 2>/dev/null)
}
# Return the {major,minor,tail} part of version. Assume version has the form:
# major.minor.tail
# The || true handles missing/ill-formed argument cases.
version_major ()
{
expr "${1}" \: '\([^.]\+\)' 2>/dev/null || true
}
version_minor ()
{
expr "${1}" \: '[^.]\+\.\([^.]\+\)' 2>/dev/null || true
}
version_tail ()
{
expr "${1}" \: '[^.]\+\.[^.]\+\.\([^.]\+\)' 2>/dev/null || true
}
# Display and record to syslog (if logger is available) an error message.
#
install_msg ()
{
local package=${1}
local priority=${2}
# Remove package and priority from ARGV; then join all args to message.
shift; shift
local message="${package}:"
local arg
for arg; do
message="${message} ${arg}"
done
# Output to stanard error and to syslog, if logger is available.
>&2 echo "${message}"
if is_exec logger; then
logger -p syslog.${priority} -t "${package}" -- "${message}" || true
fi
}
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