Generate the xboard man page (now covering cmail too) from the texinfo

[xboard.git] / backend.c

diff --git a/backend.c b/backend.c
index 5962591..e9ae20f 100644 (file)
--- a/backend.c
+++ b/backend.c
@@ -116,7 +116,7 @@ typedef struct {
 
 /* Search stats from chessprogram */
 typedef struct {
-  char movelist[MSG_SIZ]; /* Last PV we were sent */
+  char movelist[2*MSG_SIZ]; /* Last PV we were sent */
   int depth;              /* Current search depth */
   int nr_moves;           /* Total nr of root moves */
   int moves_left;         /* Moves remaining to be searched */
@@ -4349,9 +4349,23 @@ HandleMachineMove(message, cps)
                programStats.nodes = nodes;
                programStats.time = time;
                programStats.score = curscore;
-               strcpy(programStats.movelist, buf1);
                programStats.got_only_move = 0;
 
+               /* Buffer overflow protection */
+               if (buf1[0] != NULLCHAR) {
+                   if (strlen(buf1) >= sizeof(programStats.movelist)
+                       && appData.debugMode) {
+                       fprintf(debugFP,
+                               "PV is too long; using the first %d bytes.\n",
+                               sizeof(programStats.movelist) - 1);
+                   }
+                   strncpy(programStats.movelist, buf1,
+                           sizeof(programStats.movelist));
+                   buf1[sizeof(programStats.movelist) - 1] = NULLCHAR;
+               } else {
+                   sprintf(programStats.movelist, " no PV\n");
+               }
+
                if (programStats.seen_stat) {
                    programStats.ok_to_send = 1;
                }