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=549e0f2fa7f0a19801f6a86c992f1dd48e6b0d0a'>root</a>/<a href='/guix/log/tests?id=549e0f2fa7f0a19801f6a86c992f1dd48e6b0d0a'>tests</a>/<a href='/guix/log/tests/elm.scm?id=549e0f2fa7f0a19801f6a86c992f1dd48e6b0d0a'>elm.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/tests/elm.scm?id=549e0f2fa7f0a19801f6a86c992f1dd48e6b0d0a&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2024-09-17 17:34:58 +0200'>2024-09-17</span></td><td><a href='/guix/commit/tests/elm.scm?id=7979001c58fcadd98bae09781c495f0a462d6e04'>tests: Adjust ‘elm’ importer test to expect inputs without labels.</a><span class='msg-avail'>...<span class='msg-tooltip'>This is a followup af85c38b017be3d932d4665acd9ff4b5c56a9790.

* tests/elm.scm ("(guix import elm)"): Expect new-style inputs.

Change-Id: If3c6b17b5a5d17ad443c3ddb05f94dc2458ba182
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2024-06-03 22:58:53 +0200'>2024-06-03</span></td><td><a href='/guix/commit/tests/elm.scm?id=510ad5d93c0ba6208aa42815863853ec522352e6'>import: utils: End package descriptions with period.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/import/utils.scm (beautify-description): Append period to last
words which do not end with one.
* tests/crate.scm: Append period to descriptions.
* tests/elm.scm: Append period to descriptions.
* tests/gem.scm: Append period to descriptions.
* tests/hexpm.scm: Append period to descriptions.
* tests/minetest.scm: Append period to descriptions.
* tests/pypi.scm: Append period to descriptions.
* tests/import-utils.scm ("beautify-description: transform fragment into
sentence"): Likewise.

Change-Id: I0b12c4d94cb26cf62fab5b7cbf7885e66ff6c10f
Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Herman Rimm</td></tr>
<tr><td><span title='2022-05-22 01:07:52 +0200'>2022-05-22</span></td><td><a href='/guix/commit/tests/elm.scm?id=903c82583e1cec4c9ff09d5895c5cc646c37b661'>import: Add Elm importer.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/import/elm.scm, guix/scripts/import/elm.scm: New files.
* Makefile.am (MODULES): Add them.
* guix/scripts/import.scm (importers): Add "elm".
* doc/guix.texi (Invoking guix import): Document Elm importer.
* doc/contributing.texi (Elm Packages): Mention it.
* tests/elm.scm ("(guix import elm)"): New test group.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Philip McGrath</td></tr>
<tr><td><span title='2022-05-22 01:07:51 +0200'>2022-05-22</span></td><td><a href='/guix/commit/tests/elm.scm?id=aefcfdd0ae2aa41adb3d1106752b6a291ef1d80f'>guix: Add elm-build-system.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/patches/elm-offline-package-registry.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/elm.scm (elm): Use it.
* guix/build-system/elm.scm, guix/build/elm-build-system.scm,
tests/elm.scm: New files.
* Makefile.scm (MODULES, SCM_TESTS): Add them.
* doc/guix.texi (Build Systems): Document 'elm-build-system'.
* doc/contributing.texi (Elm Packages): New section. Document naming
conventions and utilities.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Philip McGrath</td></tr>