Obtain name of XBoard's man file from external command

Rather than hard-coding the path to the man file, it is now obtained
by running "man -w xboard".

diff --git a/dialogs.c b/dialogs.c
index 430f179..191061c 100644 (file)
--- a/dialogs.c
+++ b/dialogs.c
@@ -2492,12 +2492,17 @@ GetHelpText (FILE *f, char *name)
 void
 DisplayHelp (char *name)
 {
+    static char *xboardMan;
     char buf[MSG_SIZ], tidy[MSG_SIZ];
     FILE *f;
+    if(!xboardMan) {
+       xboardMan = BufferCommandOutput("man -w xboard", MSG_SIZ); // obtain path to XBoard's man file
+       if(xboardMan) xboardMan[strlen(xboardMan)-1] = NULLCHAR;   // strip off traling linefeed
+    }
     if(currentCps) {
        TidyProgramName(currentCps == &first ? appData.firstChessProgram : appData.secondChessProgram, "localhost", tidy);
        snprintf(buf, MSG_SIZ, "/usr/local/share/man/man6/%s.6", tidy);
-    } else snprintf(buf, MSG_SIZ, "%s/man6/xboard.6", manDir);
+    } else snprintf(buf, MSG_SIZ, "%s", xboardMan);
     f = fopen(buf, "r");
     if(!f && currentCps) { // engine manual could be in two places
        snprintf(buf, MSG_SIZ, "/usr/share/man/man6/%s.6", tidy);