The Guile process taking the role of PID 1 during Guix builds does not reap
zombie processes, which makes them continue responding to "kill -0".

--- a/src/testsuite/stop-server.sh	2015-02-05 11:24:00.535908842 +0100
+++ b/src/testsuite/stop-server.sh	2015-02-05 11:25:00.264351349 +0100
@@ -1,6 +1,21 @@
 #!/bin/sh
 # ngIRCd Test Suite
 
+process_is_alive(){
+    ! process_is_dead "$1" && ! process_is_undead "$1"
+}
+
+process_is_dead(){
+    ! kill -0 "$1"
+}
+
+process_is_undead(){
+    case $(ps -p "$1" -o state=) in
+        (Z*) true ;;
+        (*) false ;;
+    esac
+}
+
 [ -z "$srcdir" ] && srcdir=`dirname $0`
 
 # read in functions
@@ -24,7 +40,7 @@
 
 # waiting ...
 for i in 1 2 3 4 5; do
-  kill -0 $pid > /dev/null 2>&1; r=$?
+  process_is_alive $pid > /dev/null 2>&1; r=$?
   if [ $r -ne 0 ]; then
     echo " ok".
     exit 0
ut type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>Wojtek's customized Guix</td><td class='sub right'></td></tr></table>
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<div class='path'>path: <a href='/guix/log/?id=7749477876247199b0726d8dc6e93991a0c0c0f2'>root</a>/<a href='/guix/log/gnu?id=7749477876247199b0726d8dc6e93991a0c0c0f2'>gnu</a>/<a href='/guix/log/gnu/system?id=7749477876247199b0726d8dc6e93991a0c0c0f2'>system</a>/<a href='/guix/log/gnu/system/images?id=7749477876247199b0726d8dc6e93991a0c0c0f2'>images</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/system/images?id=7749477876247199b0726d8dc6e93991a0c0c0f2&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2024-09-08 02:00:00 +0200'>2024-09-08</span></td><td><a href='/guix/commit/gnu/system/images?id=7eddfea4a01e95a58a2c18f71bc4a345a1ad378f'>images: wsl2: Update comment.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/system/images/wsl2.scm (wsl-boot-program): Update privileged
program directory in a comment.

Change-Id: I65906cbfbcd17ff164837ad293dc4324314bfcf1
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2024-05-22 11:15:30 +0800'>2024-05-22</span></td><td><a href='/guix/commit/gnu/system/images?id=327a1f0779a5df8ebb57e39d4a44e040a5d0bdfe'>system: images: Add visionfive2 module.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/system/images/visionfive2.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.

Change-Id: I8831f1148bcddb0d604e1174034fca85cd2887a1
</span></span></td><td>Zheng Junjie</td></tr>
<tr><td><span title='2024-04-18 10:43:06 -0400'>2024-04-18</span></td><td><a href='/guix/commit/gnu/system/images?id=65e8472a4b6fc6f66871ba0dad518b7d4c63595e'>system: Remove nss-certs from OS templates, adjust doc.</a><span class='msg-avail'>...<span class='msg-tooltip'>This is a follow-up to commit 86afaadb51 ("system: Add 'nss-certs' to
%base-packages-networking.")

* doc/guix-cookbook.texi (Running Guix on a Linode Server): Remove nss-certs
from operating system's packages field.
(Running Guix on a Kimsufi Server): Likewise.
* doc/guix.texi (Using the Configuration System): Likewise.
(X.509 Certificates): Adjust to mention nss-certs *is* part of %base-packages.
* gnu/installer/services.scm (%system-services): Remove recommendation to
install nss-certs.
* gnu/system/examples/bare-bones.tmpl (host-name): Remove obsolete comments.
* gnu/system/examples/desktop.tmpl (packages): Remove nss-certs.
* gnu/system/examples/lightweight-desktop.tmpl (packages): Likewise.
* gnu/system/examples/plasma.tmpl (packages): Likewise.
* gnu/system/examples/raspberry-pi-64-nfs-root.tmpl (packages): Likewise.
* gnu/system/examples/raspberry-pi-64.tmpl (packages): Likewise.
* gnu/system/examples/vm-image.tmpl (packages): Likewise.
* gnu/system/images/orangepi-r1-plus-lts-rk3328.scm (packages): Likewise.
* gnu/system/images/pine64.scm (packages): Likewise.
* gnu/system/install.scm (installation-os) [packages]: Likewise.

Change-Id: If09123a69b987178bcb0aab61c4570c14fc1286f
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2023-12-22 16:06:15 -0800'>2023-12-22</span></td><td><a href='/guix/commit/gnu/system/images?id=ab1ff7ca40b0a2d935f715dcf64f0f3128632d3d'>images: Add orangepi-r1-plus-lts image.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/local.mk: Register image.
* gnu/system/images/orangepi-r1-plus-lts-rk3328.scm: New file.
* gnu/system/install.scm (orangepi-r1-plus-lts-rk3328-installation-os):
  New variable.

Signed-off-by: Vagrant Cascadian &lt;vagrant@debian.org&gt;
</span></span></td><td>Herman Rimm</td></tr>
<tr><td><span title='2023-06-14 14:52:21 +0300'>2023-06-14</span></td><td><a href='/guix/commit/gnu/system/images?id=f3114ac4f0f1ac20a85dcb20c44cb32e06c22a14'>system: images: Add unmatched module.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/system/images/unmatched.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2022-12-26 09:34:26 +0100'>2022-12-26</span></td><td><a href='/guix/commit/gnu/system/images?id=c50cd1bbece27097456242f246f89c053e7cc1a2'>images: wsl2: Create XDG_RUNTIME_DIR on first login.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/system/images/wsl2.scm (wsl-boot-program): Create XDG_RUNTIME_DIR on
first login and set it.

Signed-off-by: Mathieu Othacehe &lt;othacehe@gnu.org&gt;
</span></span></td><td>dan</td></tr>
<tr><td><span title='2022-12-09 11:02:15 +0800'>2022-12-09</span></td><td><a href='/guix/commit/gnu/system/images?id=ec9326f021e37aa6ae97d6bab0c39f44f24cd11b'>system: images: Add networking support to pine64 image.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/system/images/pine64.scm (pine64-barebones-os) [services]: Add
dhcp-client-service-type and ntp-service-type to the list of services.
[packages]: Add nss-certs to the list of packages.

Signed-off-by: 宋文武 &lt;iyzsong@member.fsf.org&gt;
</span></span></td><td>Gabriel Wicki</td></tr>