postinst is in openssh-client 1:7.6p1-4ubuntu0.3.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
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 | #!/bin/sh
set -e
action="$1"
oldversion="$2"
umask 022
create_alternatives() {
# Create alternatives for the various r* tools.
# Make sure we don't change existing alternatives that a user might have
# changed, but clean up after some old alternatives that mistakenly pointed
# rlogin and rcp to ssh.
update-alternatives --quiet --remove rlogin /usr/bin/ssh
update-alternatives --quiet --remove rcp /usr/bin/ssh
for cmd in rsh rlogin rcp; do
scmd="s${cmd#r}"
if ! update-alternatives --display "$cmd" 2>/dev/null | \
grep -q "$scmd"; then
update-alternatives --quiet --install "/usr/bin/$cmd" "$cmd" "/usr/bin/$scmd" 20 \
--slave "/usr/share/man/man1/$cmd.1.gz" "$cmd.1.gz" "/usr/share/man/man1/$scmd.1.gz"
fi
done
}
set_ssh_agent_permissions() {
if ! getent group ssh >/dev/null; then
addgroup --system --quiet ssh
fi
if ! dpkg-statoverride --list /usr/bin/ssh-agent >/dev/null; then
chgrp ssh /usr/bin/ssh-agent
chmod 2755 /usr/bin/ssh-agent
fi
}
if [ "$action" = configure ]; then
create_alternatives
set_ssh_agent_permissions
fi
exit 0
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