From: H.G.Muller <hgm@hgm-xboard.(none)>
Date: Fri, 11 Mar 2016 22:43:48 +0000 (+0100)
Subject: Also try to get help for engine options
X-Git-Url: http://hgm.nubati.net/cgi-bin/gitweb.cgi?p=xboard.git;a=commitdiff_plain;h=c4709fa28f09b91b7d36c17cce477b7b9b498e6e;hp=9d32c01d675cb8e6a95a9492b1d9eb274653e1ca

Also try to get help for engine options

Help clicks in the Engine Settings dialogs will try to scan the man page
of the corresponding engine for info about the option. This is a bit
tricky, as it must assume the name of the engine is the same as that
of the engine command and the manual for it is in section 6. In addition
it must look in both /usr/share/man and /usr/local/share/man, as it cannot
know whether the engine was installed from source or repo. Finally it
must hope the man page isn't gzipped.
---

diff --git a/dialogs.c b/dialogs.c
index 6ecdcaf7..d57b5769 100644
--- a/dialogs.c
+++ b/dialogs.c
@@ -2491,8 +2491,14 @@ GetHelpText (FILE *f, char *name)
 void
 DisplayHelp (char *name)
 {
-    char *manFile = MANDIR "/man6/xboard.6";
-    FILE *f = fopen(manFile, "r");
+    char buf[MSG_SIZ], *manFile = MANDIR "/man6/xboard.6";
+    FILE *f;
+    if(currentCps) snprintf(manFile = buf, MSG_SIZ, "/usr/share/man/man6/%s.6", currentCps->program);
+    f = fopen(manFile, "r");
+    if(!f && currentCps) { // engine manual could be in two places
+	snprintf(buf, MSG_SIZ, "/usr/man/man6/%s.6", currentCps->program);
+	f= fopen(buf, "r");
+    }
     if(f) {
 	GetHelpText(f, name);
 	fclose(f);