Allow the configuration file and theme directory to be specified at run time.
Patch by Eelco Dolstra, from Nixpkgs.

--- slim-1.3.6/app.cpp	2013-10-02 00:38:05.000000000 +0200
+++ slim-1.3.6/app.cpp	2013-10-15 11:02:55.629263422 +0200
@@ -200,7 +200,9 @@
 
 	/* Read configuration and theme */
 	cfg = new Cfg;
-	cfg->readConf(CFGFILE);
+	char *cfgfile = getenv("SLIM_CFGFILE");
+	if (!cfgfile) cfgfile = CFGFILE;
+	cfg->readConf(cfgfile);
 	string themebase = "";
 	string themefile = "";
 	string themedir = "";
@@ -208,7 +210,9 @@
 	if (testing) {
 		themeName = testtheme;
 	} else {
-		themebase = string(THEMESDIR) + "/";
+		char *themesdir = getenv("SLIM_THEMESDIR");
+		if (!themesdir) themesdir = THEMESDIR;
+		themebase = string(themesdir) + "/";
 		themeName = cfg->getOption("current_theme");
 		string::size_type pos;
 		if ((pos = themeName.find(",")) != string::npos) {
put type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>Wojtek's customized Guix</td><td class='sub right'></td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=3048b6f20440c17f3d8fb045646095faad615da9'>refs</a><a class='active' href='/guix/log/gnu/packages/moreutils.scm'>log</a><a href='/guix/tree/gnu/packages/moreutils.scm?id=3048b6f20440c17f3d8fb045646095faad615da9'>tree</a><a href='/guix/commit/gnu/packages/moreutils.scm?id=3048b6f20440c17f3d8fb045646095faad615da9'>commit</a><a href='/guix/diff/gnu/packages/moreutils.scm?id=3048b6f20440c17f3d8fb045646095faad615da9'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages/moreutils.scm'>
<input type='hidden' name='id' value='3048b6f20440c17f3d8fb045646095faad615da9'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=3048b6f20440c17f3d8fb045646095faad615da9'>root</a>/<a href='/guix/log/gnu?id=3048b6f20440c17f3d8fb045646095faad615da9'>gnu</a>/<a href='/guix/log/gnu/packages?id=3048b6f20440c17f3d8fb045646095faad615da9'>packages</a>/<a href='/guix/log/gnu/packages/moreutils.scm?id=3048b6f20440c17f3d8fb045646095faad615da9'>moreutils.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/moreutils.scm?id=3048b6f20440c17f3d8fb045646095faad615da9&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2024-08-31 10:42:36 +0200'>2024-08-31</span></td><td><a href='/guix/commit/gnu/packages/moreutils.scm?id=a2255a5b783fe3a1a5b7b1284f394d5ff1589fe3'>gnu: moreutils: Add 'bash' input for 'wrap-program'.</a><span class='msg-avail'>...<span class='msg-tooltip'>It is required for cross-compilation.

* gnu/packages/moreutils.scm (moreutils)[inputs]: Add 'bash-minimal'.

Signed-off-by: Maxim Cournoyer &lt;maxim.cournoyer@gmail.com&gt;
Change-Id: I3f0d8ec4f7f6c99a5c759abe2f438ccbbb5c913c
</span></span></td><td>Maxime Devos</td></tr>
<tr><td><span title='2024-08-31 10:42:08 +0200'>2024-08-31</span></td><td><a href='/guix/commit/gnu/packages/moreutils.scm?id=7e4ddd2d2e11c3a978a56b20aec6cd2e5935d07a'>gnu: docbook: Remove leftovers.</a><span class='msg-avail'>...<span class='msg-tooltip'>docbook-xsl patches are probably remnants from
1f7d94597f1e78776f854eeca46c03a3aded8466.

* gnu/packages/docbook.scm: Remove unused import.
* gnu/packages/patches/docbook-xsl-nonrecursive-string-subst.patch: Remove.
* gnu/packages/patches/docbook-xsl-support-old-url.patch: Ditto.
* gnu/local.mk: Unregister it.
* gnu/packages/moreutils.scm (moreutils)[native-inputs]: Drop obsolete
comment.

Signed-off-by: Maxim Cournoyer &lt;maxim.cournoyer@gmail.com&gt;
</span></span></td><td>Bruno Victal</td></tr>
<tr><td><span title='2024-04-26 16:45:03 +0100'>2024-04-26</span></td><td><a href='/guix/commit/gnu/packages/moreutils.scm?id=27625a7f902744a56a669ed0c83f471129c1884b'>gnu: moreutils: Update to 0.69.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/moreutils.scm (moreutils): Update to 0.69.

Signed-off-by: Christopher Baines &lt;mail@cbaines.net&gt;
</span></span></td><td>fanquake</td></tr>
<tr><td><span title='2023-11-19 01:00:00 +0100'>2023-11-19</span></td><td><a href='/guix/commit/gnu/packages/moreutils.scm?id=109a2485d7a76cfade54fbb408bf3c2e84376c47'>gnu: moreutils: Update to 0.68.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/moreutils.scm (moreutils): Update to 0.68.

Change-Id: Ie8320c18eaef1b481918894c5baaedc4144b0d19
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>