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  • Committer: Teddy Hogeborn
  • Date: 2024-11-17 16:53:00 UTC
  • mto: This revision was merged to the branch mainline in revision 412.
  • Revision ID: teddy@recompile.se-20241117165300-02hxm96s8cj9528e
mandos: Avoid closing configured server network socket

If we are passed a pre-created created network socket as a file
descriptor, we must avoid later closing it (when stdin, stdout and
stderr are dup2()ed over with /dev/null) by making sure that the
network file descriptor is not 0, 1, or 2, by creating a new file
descriptor if necessary.

However, when we create a new file descriptor we must check that the
new file descriptor is not 0, 1, or 2 either, and try again until we
get a suitable file descriptor.

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#!/bin/sh
 
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# prerm script for mandos
 
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#
 
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# see: dh_installdeb(1)
 
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set -e
 
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# summary of how this script can be called:
 
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#        * <prerm> 'remove'
 
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#        * <old-prerm> 'upgrade' <new-version>
 
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#        * <new-prerm> 'failed-upgrade' <old-version>
 
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#        * <conflictor's-prerm> 'remove' 'in-favour' <package> <new-version>
 
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#        * <deconfigured's-prerm> 'deconfigure' 'in-favour'
 
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#          <package-being-installed> <version> 'removing'
 
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#          <conflicting-package> <version>
 
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# for details, see /usr/share/doc/packaging-manual/
 
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case "$1" in
 
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    remove|deconfigure)
 
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        invoke-rc.d mandos stop || :
 
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        ;;
 
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    upgrade|failed-upgrade)
 
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        ;;
 
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    *)
 
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        echo "prerm called with unknown argument '$1'" >&2
 
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        exit 0
 
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    ;;
 
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esac
 
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#DEBHELPER#
 
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exit 0