Borrowed from Debian.

--- swish-e-2.4.7/src/parser.c	2009-04-05 03:58:32.000000000 +0200
+++ swish-e-2.4.7/src/parser.c	2013-06-11 13:53:08.196559035 +0200
@@ -1760,7 +1760,7 @@
     va_start(args, msg);
     vsnprintf(str, 1000, msg, args );
     va_end(args);
-    xmlParserError(parse_data->ctxt, str);
+    xmlParserError(parse_data->ctxt, "%s", str);
 }
 
 static void warning(void *data, const char *msg, ...)
@@ -1772,7 +1772,7 @@
     va_start(args, msg);
     vsnprintf(str, 1000, msg, args );
     va_end(args);
-    xmlParserWarning(parse_data->ctxt, str);
+    xmlParserWarning(parse_data->ctxt, "%s", str);
 }
 
 
--- swish-e-2.4.7/src/result_output.c	2009-04-05 03:58:32.000000000 +0200
+++ swish-e-2.4.7/src/result_output.c	2013-06-11 13:53:38.593550825 +0200
@@ -752,7 +752,7 @@
             s = (char *) emalloc(MAXWORDLEN + 1);
             n = strftime(s, (size_t) MAXWORDLEN, fmt, localtime(&(pv->value.v_date)));
             if (n && f)
-                fprintf(f, s);
+                fprintf(f, "%s", s);
             efree(s);
         }
         break;
href='/guix/refs/?id=05c08ec9f60851aa72b5eaf67ab7d2da2ffde872'>refs</a><a class='active' href='/guix/log/etc/guix-install.sh'>log</a><a href='/guix/tree/etc/guix-install.sh?id=05c08ec9f60851aa72b5eaf67ab7d2da2ffde872'>tree</a><a href='/guix/commit/etc/guix-install.sh?id=05c08ec9f60851aa72b5eaf67ab7d2da2ffde872'>commit</a><a href='/guix/diff/etc/guix-install.sh?id=05c08ec9f60851aa72b5eaf67ab7d2da2ffde872'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/etc/guix-install.sh'>
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<div class='path'>path: <a href='/guix/log/?id=05c08ec9f60851aa72b5eaf67ab7d2da2ffde872'>root</a>/<a href='/guix/log/etc?id=05c08ec9f60851aa72b5eaf67ab7d2da2ffde872'>etc</a>/<a href='/guix/log/etc/guix-install.sh?id=05c08ec9f60851aa72b5eaf67ab7d2da2ffde872'>guix-install.sh</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/etc/guix-install.sh?id=05c08ec9f60851aa72b5eaf67ab7d2da2ffde872&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2018-01-30 03:48:04 +0100'>2018-01-30</span></td><td><a href='/guix/commit/etc/guix-install.sh?id=6f4e8693e7b0c5d830eafa8a69c3559390f13369'>etc: Add installation script.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/guix-install.sh: New file.
* Makefile.am (EXTRA_DIST): Add it.
* doc/guix.texi (Binary Installation): Mention it.

Co-authored-by: sharlatan &lt;sharlatanus@gmail.com&gt;
</span></span></td><td>Ricardo Wurmus</td></tr>