This patch fixes SLiM so it really waits for the X server to be ready
before attempting to connect to it.  Indeed, the X server notices that
its parent process has a handler for SIGUSR1, and consequently sends it
SIGUSR1 when it's ready to accept connections.

The problem was that SLiM doesn't pay attention to SIGUSR1.  So in practice,
if X starts slowly, then SLiM gets ECONNREFUSED a couple of time on
/tmp/.X11-unix/X0, then goes on trying to connect to localhost:6000,
where nobody answers; eventually, it times out and tries again on
/tmp/.X11-unix/X0, and finally it shows up on the screen.

Patch by L. Courtès.

--- slim-1.3.6/app.cpp	2014-02-05 15:27:20.000000000 +0100
+++ slim-1.3.6/app.cpp	2014-02-09 22:42:04.000000000 +0100
@@ -119,7 +119,9 @@ void CatchSignal(int sig) {
 	exit(ERR_EXIT);
 }
 
+static volatile int got_sigusr1 = 0;
 void User1Signal(int sig) {
+	got_sigusr1 = 1;
 	signal(sig, User1Signal);
 }
 
@@ -884,6 +886,7 @@ int App::WaitForServer() {
 	int	ncycles	 = 120;
 	int	cycles;
 
+	while (!got_sigusr1);
 	for(cycles = 0; cycles < ncycles; cycles++) {
 		if((Dpy = XOpenDisplay(DisplayName))) {
 			XSetIOErrorHandler(xioerror);
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<div class='path'>path: <a href='/guix/log/?id=404dbd894c69c94b483c6139d2a39b1c1eaddf36'>root</a>/<a href='/guix/log/gnu?id=404dbd894c69c94b483c6139d2a39b1c1eaddf36'>gnu</a>/<a href='/guix/log/gnu/installer.scm?id=404dbd894c69c94b483c6139d2a39b1c1eaddf36'>installer.scm</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/installer.scm?id=404dbd894c69c94b483c6139d2a39b1c1eaddf36&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2024-05-29 22:01:23 -0400'>2024-05-29</span></td><td><a href='/guix/commit/gnu/installer.scm?id=afacfa33ec4b52cb9ffb9b0a7a0c1e68cf264673'>gnu: linux-libre: Enable Zstd compression of kernel modules.</a><span class='msg-avail'>...<span class='msg-tooltip'>This brings the on disk size of the kernel from 164 MiB to 144 MiB, or about
12%.

* gnu/packages/linux.scm (default-extra-linux-options)
[version&gt;=5.13]: Enable CONFIG_MODULE_COMPRESS_ZSTD, else
CONFIG_MODULE_COMPRESS_GZIP.
(make-linux-libre*) [phases] {set-environment}: Set ZSTD_CLEVEL environment
variable to 19.
[native-inputs]: Add zstd.
* gnu/build/linux-modules.scm (module-regex): Add .zst to regexp.  Update doc.
(modinfo-section-contents): Extend support to Zstd compressed module.
(dot-ko): Register the 'zstd compression type.
(ensure-dot-ko, file-name-&gt;module-name, load-linux-module*)
(module-name-&gt;file-name/guess, write-module-name-database)
(write-module-alias-database, write-module-device-database): Update doc.
(module-name-lookup): Also consider zstd-compressed modules.
* gnu/installer.scm (installer-program): Add guile-zstd extension to gexp.
* gnu/system/linux-initrd.scm (flat-linux-module-directory): Likewise.
Decompress zstd-compressed modules for use in initrd.
* guix/profiles.scm (linux-module-database): Add guile-zstd extension to gexp.

Change-Id: Ide899dc5c58ea5033583b1a91a92c025fc8d901a
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2023-12-25 19:58:21 +0200'>2023-12-25</span></td><td><a href='/guix/commit/gnu/installer.scm?id=3e41b252cfc81508bfcd0ac7103df212b35c3b91'>gnu: Adjust to removing ed.scm and nano.scm</a><span class='msg-avail'>...<span class='msg-tooltip'>This is a follow-up to f6817e71dff7d0d9fdb55db8b85a1d3d04e2bf5a and
e11e65a9ad08e18ea2faac3c9f4639a7b189bf76.

* gnu/installer.scm, gnu/packages/algebra.scm, gnu/packages/base.scm,
gnu/packages/cook.scm, gnu/packages/lisp.scm,
gnu/packages/patchutils.scm, gnu/packages/version-control.scm,
gnu/packages/web-browsers.scm, gnu/system.scm: Adjust module imports.

Change-Id: I25e5519fa003c35a14b81c3dda37b24527858634
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2023-12-02 12:25:45 +0100'>2023-12-02</span></td><td><a href='/guix/commit/gnu/installer.scm?id=b0715d7cd2a74bc231751f8afc9dffb2047501ac'>gnu: Use ‘libc-utf8-locales-for-target’.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/packages.scm (%standard-patch-inputs): Use
‘libc-utf8-locales-for-target’ instead of ‘glibc-utf8-locales’.
* guix/self.scm (%packages): Likewise.
* gnu/home/services/ssh.scm (file-join): Likewise
* gnu/installer.scm (build-compiled-file): Likewise.
* gnu/packages/chromium.scm (ungoogled-chromium/wayland): Likewise.
* gnu/packages/gnome.scm (libgweather4, tracker): Likewise.
* gnu/packages/javascript.scm (js-mathjax): Likewise.
* gnu/packages/package-management.scm (guix, flatpak): Likewise.
* gnu/packages/raspberry-pi.scm (raspi-arm64-chainloader): Likewise.
* gnu/packages/suckless.scm (svkbd): Likewise.
* gnu/services.scm (cleanup-gexp): Likewise.
* gnu/services/base.scm (guix-publish-shepherd-service): Likewise.
* gnu/services/guix.scm (guix-build-coordinator-shepherd-services)
(guix-build-coordinator-agent-shepherd-services): Likewise.
* gnu/services/guix.scm (guix-build-coordinator-queue-builds-shepherd-services):
(guix-data-service-shepherd-services)
(nar-herder-shepherd-services)
(bffe-shepherd-services): Likewise.
* gnu/services/web.scm (anonip-shepherd-service)
(mumi-shepherd-services): Likewise.
* gnu/system/image.scm (system-disk-image, system-iso9660-image)
(system-docker-image, system-tarball-image): Likewise.
* gnu/system/install.scm (%installation-services): Likewise.
* guix/profiles.scm (info-dir-file): Likewise.
(ca-certificate-bundle, profile-derivation): Likewise.
* guix/scripts/pack.scm (store-database, set-utf8-locale): Likewise.
* tests/pack.scm: Likewise.
* tests/profiles.scm ("profile-derivation, cross-compilation"):
Likewise.

Co-authored-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
Co-authored-by: Christopher Baines &lt;mail@cbaines.net&gt;
Change-Id: I24239f427bcc930c29d2ba5d00dc615960a6c374
</span></span></td><td>Janneke Nieuwenhuizen</td></tr>