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man: add ID_LIKE definition to os-release(5)

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As requested by Raphaël Hertzog from the Debian project, encode
derivative information in /etc/os-release.
This commit is contained in:
Lennart Poettering
2012-03-06 13:59:12 +01:00
parent 93e487fc8f
commit e21aee1494
1 changed files with 36 additions and 0 deletions
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man/os-release.xml
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@@ -144,6 +144,42 @@
<literal>ID=debian</literal>.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>ID_LIKE=</varname></term>
<listitem><para>A space-separated list
of operating system identifiers in the
same syntax as the
<varname>ID=</varname> setting. Should
list identifiers of operating systems
that are closely related to the local
operating system in regards to
packaging and programming interfaces,
for example listing one or more
distribution identifiers the local
distribution is a derivative
from. Build scripts and similar should
check this variable if they need to
identify the local operating system
and the value of
<varname>ID=</varname> is not
recognized. Operating systems should
be listed in order of how closely the
local operating system relates to the
listed ones, starting with the
closest. This field is
optional. Example: for an operating
system with
<literal>ID=centos</literal> an
assignment of <literal>ID_LIKE="rhel
fedora"</literal> would be
appropriate. For an operating systemd
with <literal>ID=ubuntu</literal> an
assignment of
<literal>ID_LIKE=debian</literal> is
appropriate.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>VERSION_ID=</varname></term>