2016-03-23 16:34:57 +01:00
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#!/bin/sh
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#
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# 2016 Daniel Heule (hda at sfs.biz)
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2017-08-20 11:06:07 -04:00
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# Copyright 2017, Philippe Gregoire <pg@pgregoire.xyz>
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2016-03-23 16:34:57 +01:00
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#
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# This file is part of cdist.
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#
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# cdist is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# cdist is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with cdist. If not, see <http://www.gnu.org/licenses/>.
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#
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#
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2016-03-24 11:22:09 +01:00
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# Returns the process name of pid 1 ( normaly the init system )
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# for example at linux this value is "init" or "systemd" in most cases
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2016-03-23 16:34:57 +01:00
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#
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2019-10-02 15:39:30 +02:00
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case $(uname -s) in
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2017-08-20 11:06:07 -04:00
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Linux)
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2020-01-30 18:35:50 +01:00
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if test -d /proc/1/
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2019-10-02 15:39:30 +02:00
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then
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2020-01-30 18:35:50 +01:00
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comm_name=$(cat /proc/1/comm)
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2019-10-02 15:39:30 +02:00
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else
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2020-01-30 18:35:50 +01:00
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# BusyBox's versions of ps and pgrep do not support some options
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# depending on which compile-time options have been used.
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# Both pgrep and ps are tried to get the command name
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comm_name=$(
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pgrep -P0 -l 2>/dev/null | awk '/^1[ \t]/ { print $2 }'
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|| ps -o comm= -p 1 2>/dev/null)
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2019-10-02 15:39:30 +02:00
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fi
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2020-01-30 18:35:50 +01:00
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case $comm_name
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in
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systemd)
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echo systemd
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;;
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init)
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# It could be anything...
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if test -h /proc/1/exe
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then
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init_exe=/proc/1/exe
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else
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init_exe=$(command -v "$comm_name")
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fi
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test -x "$comm_exe" || exit 1
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case $("$comm_exe" --version | head -n 1)
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in
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*SysV*)
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echo init
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;;
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*upstart*)
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echo upstart
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;;
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*)
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echo ""
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;;
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esac
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esac
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2017-08-20 11:06:07 -04:00
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;;
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2019-04-24 11:15:44 +02:00
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FreeBSD|OpenBSD)
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2019-10-02 15:39:30 +02:00
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ps -o comm= -p 1 2>/dev/null || true
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;;
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Darwin)
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basename "$(ps -o comm= -p 1 2>/dev/null)"
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2016-03-24 11:22:09 +01:00
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;;
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*)
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2016-03-25 16:39:48 +01:00
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# return a empty string as unknown value
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echo ""
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2016-03-24 11:22:09 +01:00
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;;
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esac
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