dhcp/repos/extra-x86_64/0001-99-replace-hostname-with-uname-n.patch

   1 From b2482a4f7d9a06a9c10a26eb1fb2b855d83e94c7 Mon Sep 17 00:00:00 2001
   2 From: Christian Hesse <mail@eworm.de>
   3 Date: Thu, 4 Aug 2022 12:15:46 +0200
   4 Subject: [PATCH] [!99] replace `hostname` with `uname -n` & `sysctl`
   5
   6 The former belongs to package `inetutils`, which has some security
   7 implications, so let's use `uname` from `coreutils` to get the hostname.
   8
   9 For *setting* the hostname things are more limited. Let's use `sysctl`.
  10 ---
  11  client/scripts/linux | 4 ++--
  12  1 file changed, 2 insertions(+), 2 deletions(-)
  13
  14 diff --git a/client/scripts/linux b/client/scripts/linux
  15 index c4e51f6d..fe4da445 100755
  16 --- a/client/scripts/linux
  17 +++ b/client/scripts/linux
  18 @@ -113,7 +113,7 @@ set_hostname() {
  19      local current_hostname
  20
  21      if [ -n "$new_host_name" ]; then
  22 -        current_hostname=$(hostname)
  23 +        current_hostname=$(uname -n)
  24
  25          # current host name is empty, '(none)' or 'localhost' or differs from new one from DHCP
  26          if [ -z "$current_hostname" ] ||
  27 @@ -121,7 +121,7 @@ set_hostname() {
  28             [ "$current_hostname" = 'localhost' ] ||
  29             [ "$current_hostname" = "$old_host_name" ]; then
  30             if [ "$new_host_name" != "$old_host_name" ]; then
  31 -               hostname "$new_host_name"
  32 +               sysctl -w kernel/hostname="$new_host_name"
  33             fi
  34          fi
  35      fi