Allow disabling savefile UID checking in sysconf

doc/Guidebook.mn

@@ -3007,6 +3007,9 @@ A string explaining how to recover a game on this system (no default value).
 SEDUCE
 0 or 1 to disable or enable, respectively, the SEDUCE option (see the source
 for details on this function).
+.lp
+CHECK_SAVE_UID
+0 or 1 to disable or enable, respectively, the UID checking for savefiles.
 .pg
 The following options affect the score file:
 .pg

doc/Guidebook.tex

@@ -3597,6 +3597,9 @@ A string explaining how to recover a game on this system (no default value).
 \item[\ib{SEDUCE}]
 0 or 1 to disable or enable, respectively, the SEDUCE option (see the source)
 for details on this function.
+%.lp
+\item[\ib{CHECK\_SAVE\_UID}]
+0 or 1 to disable or enable, respectively, the UID checking for savefiles.
 \elist
 
 %.pg

include/sys.h

@@ -35,6 +35,7 @@ struct sysopt {
 # endif
 #endif
 	int seduce;
+	int check_save_uid; /* restoring savefile checks UID? */
 };
 
 extern  struct sysopt sysopt;

src/files.c

@@ -2206,6 +2206,9 @@ int		src;
     } else if (src == SET_IN_SYS && match_varname(buf, "RECOVER", 7)) {
         if (sysopt.recover) free(sysopt.recover);
         sysopt.recover = dupstr(bufp);
+    } else if (src == SET_IN_SYS && match_varname(buf, "CHECK_SAVE_UID", 14)) {
+	n = atoi(bufp);
+	sysopt.check_save_uid = n;
     } else if (match_varname(buf, "SEDUCE", 6)) {
         n = !!atoi(bufp);	/* XXX this could be tighter */
         /* allow anyone to turn it off, but only sysconf to turn it on*/

src/restore.c

@@ -502,6 +502,13 @@ register struct obj *otmp;
 	else otmp->spe = fruitadd(oldf->fname, (struct fruit *)0);
 }
 
+
+#ifdef SYSCF
+#define SYSOPT_CHECK_SAVE_UID sysopt.check_save_uid
+#else
+#define SYSOPT_CHECK_SAVE_UID TRUE
+#endif
+
 STATIC_OVL
 boolean
 restgamestate(fd, stuckid, steedid)
@@ -517,7 +524,7 @@ unsigned int *stuckid, *steedid;
 	unsigned long uid;
 
 	mread(fd, (genericptr_t) &uid, sizeof uid);
-	if (uid != (unsigned long)getuid()) {		/* strange ... */
+	if (SYSOPT_CHECK_SAVE_UID && uid != (unsigned long)getuid()) {		/* strange ... */
 	    /* for wizard mode, issue a reminder; for others, treat it
 	       as an attempt to cheat and refuse to restore this file */
 	    pline("Saved game was not yours.");

src/sys.c

@@ -67,6 +67,7 @@ sys_early_init()
 # endif
 #endif
 
+	sysopt.check_save_uid = 1;
 	sysopt.seduce = 1;	/* if it's compiled in, default to on */
 	sysopt_seduce_set(sysopt.seduce);
 }

sys/unix/sysconf

@@ -35,6 +35,9 @@ MAXPLAYERS=10
 # Uncomment the next line to disable the SEDUCE option.
 #SEDUCE=0
 
+# Uncomment to disable savefile UID checking.
+#CHECK_SAVE_UID=0
+
 # Record (high score) file options.
 # CAUTION: changing these after people have started playing games can
 #  lead to lost high scores!