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);
d6c26b9be9b2a6d6a2'>refs</a><a class='active' href='/guix/log/gnu/packages/presentation.scm'>log</a><a href='/guix/tree/gnu/packages/presentation.scm?id=85ca23b0c54d18ef1ac32ed6c26b9be9b2a6d6a2'>tree</a><a href='/guix/commit/gnu/packages/presentation.scm?id=85ca23b0c54d18ef1ac32ed6c26b9be9b2a6d6a2'>commit</a><a href='/guix/diff/gnu/packages/presentation.scm?id=85ca23b0c54d18ef1ac32ed6c26b9be9b2a6d6a2'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages/presentation.scm'>
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<div class='path'>path: <a href='/guix/log/?id=85ca23b0c54d18ef1ac32ed6c26b9be9b2a6d6a2'>root</a>/<a href='/guix/log/gnu?id=85ca23b0c54d18ef1ac32ed6c26b9be9b2a6d6a2'>gnu</a>/<a href='/guix/log/gnu/packages?id=85ca23b0c54d18ef1ac32ed6c26b9be9b2a6d6a2'>packages</a>/<a href='/guix/log/gnu/packages/presentation.scm?id=85ca23b0c54d18ef1ac32ed6c26b9be9b2a6d6a2'>presentation.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/packages/presentation.scm?id=85ca23b0c54d18ef1ac32ed6c26b9be9b2a6d6a2&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-06-30 21:13:52 +0300'>2020-06-30</span></td><td><a href='/guix/commit/gnu/packages/presentation.scm?id=7dfe25f57433be9b26b08eb38faaa2560de4743d'>gnu: Add presentty.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/presentation.scm (presentty): New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Register it.
</span></span></td><td>Efraim Flashner</td></tr>
f symbols.
[maybe-inputs]: Wrap INPUTS in 'list' instead of 'quasiquote'.
* tests/hackage.scm (match-ghc-foo)
(match-ghc-foo-6)
(match-ghc-foo-revision)
(match-ghc-foo-import): Adjust accordingly.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;


</td></tr>
<tr class='logheader'><td><span title='2021-06-25 15:12:05 +0200'>2021-06-25</span></td><td class='logsubject'><a href='/guix/commit/tests/hackage.scm?id=dfac3e643a924ccefc997b4433a0b5c35928d657'>import: hackage: Support "common" field and imports</a></td><td>Philip Munksgaard</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
Fixes &lt;https://issues.guix.gnu.org/48701&gt;.

* guix/import/cabal.scm (make-cabal-parser): Modify.
(is-common): New variable.
(lex-common): New procedure.
(is-id): Modify.
(eval-cabal): Modify.
* tests/hackage.scm ("hackage-&gt;guix-package test cabal import") New test.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;


</td></tr>
<tr class='logheader'><td><span title='2021-05-22 23:39:27 +0200'>2021-05-22</span></td><td class='logsubject'><a href='/guix/commit/tests/hackage.scm?id=cfec09a9928e171a724f630ba652ea0241d52e92'>import: hackage: Prefix licenses with 'license:'.</a></td><td>Xinglu Chen</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* guix/import/hackage.scm (string-&gt;license): Prefix the value of the license
field with ‘license:’.
* tests/hackage.scm (match-ghc-foo, match-ghc-foo-6, match-ghc-foo-revision):
Adjust accordingly.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;


</td></tr>