Add pledge support and move score file to $HOME.

For high score entries use the same logic as in snake(6) and tetris(6):
Try LOGNAME then USER then getlogin(2) and fall back to ???.
For variety, atc(6) uses flock(2), so add a "flock" promise to the usual
"stdio rpath rpath cpath tty" for games.

4 files changed, 40 insertions, 33 deletions

diff --git a/games/atc/atc.6 b/games/atc/atc.6
index 66975861aa7..bd26475e067 100644
--- a/games/atc/atc.6
+++ b/games/atc/atc.6
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: atc.6,v 1.20 2014/11/30 02:41:43 schwarze Exp $
+.\"	$OpenBSD: atc.6,v 1.21 2015/11/29 15:23:38 tb Exp $
 .\"
 .\" Copyright (c) 1990, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -34,7 +34,7 @@
 .\"
 .\" Copyright (c) 1986 Ed James. All rights reserved.
 .\"
-.Dd $Mdocdate: November 30 2014 $
+.Dd $Mdocdate: November 29 2015 $
 .Dt ATC 6
 .Os
 .Sh NAME
@@ -585,13 +585,18 @@ line:		[ (  1  1 ) (  6  6 ) ]
 		[ ( 13 17 ) ( 28 17 ) ]
 		[ (  1  7 ) ( 11  7 ) ] ;
 .Ed
+.Sh ENVIRONMENT
+.Bl -tag -width Ds
+.It Ev LOGNAME
+Name to be recorded in high score file.
+.El
 .Sh FILES
 Files are kept in a special directory, which can be shown by using the
 .Fl p
 flag.
 .Pp
 .Bl -tag -width "/usr/share/games/atc/Game_List" -compact
-.It Pa /var/games/atc_score
+.It Pa $HOME/.atc.scores
 Score file.
 .It Pa /usr/share/games/atc/Game_List
 The list of playable games.
diff --git a/games/atc/log.c b/games/atc/log.c
index 7ac6ea31672..575a9264f67 100644
--- a/games/atc/log.c
+++ b/games/atc/log.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: log.c,v 1.19 2014/12/09 05:01:14 deraadt Exp $	*/
+/*	$OpenBSD: log.c,v 1.20 2015/11/29 15:23:38 tb Exp $	*/
 /*	$NetBSD: log.c,v 1.3 1995/03/21 15:04:21 cgd Exp $	*/
 
 /*-
@@ -94,23 +94,30 @@ int
 open_score_file(void)
 {
 	mode_t old_mode;
+	char *home;
+	char scorefile[PATH_MAX];
+	int ret;
 	int score_fd;
 
+	home = getenv("HOME");
+	if (home == NULL || *home == '\0')
+		err(1, "getenv");
+	ret = snprintf(scorefile, sizeof(scorefile), "%s/%s", home,
+	    ".atc.scores");
+	if (ret < 0 || ret >= PATH_MAX)
+		errc(1, ENAMETOOLONG, "%s/%s", home, ".atc.scores");
+
 	old_mode = umask(0);
-	score_fd = open(_PATH_SCORE, O_CREAT|O_RDWR, 0664);
-	if (score_fd < 0) {
-		perror(_PATH_SCORE);
-		return (-1);
-	}
+	score_fd = open(scorefile, O_CREAT|O_RDWR, 0644);
+	if (score_fd < 0)
+		err(1, "open");
 	/*
 	 * This is done to take advantage of stdio, while still 
 	 * allowing a O_CREAT during the open(2) of the log file.
 	 */
 	score_fp = fdopen(score_fd, "r+");
-	if (score_fp == NULL) {
-		perror(_PATH_SCORE);
-		return (-1);
-	}
+	if (score_fp == NULL)
+		err(1, "fdopen");
 	umask(old_mode);
 	return (0);
 }
@@ -119,17 +126,15 @@ int
 log_score(int list_em)
 {
 	int		i, num_scores = 0, good, changed = 0, found = 0;
-	struct passwd	*pw;
+	const char	*name;
 	char		*cp;
 	char		scanstr[50];
 	SCORE		score[NUM_SCORES], thisscore;
 
 	if (score_fp == NULL)
 		return (-1);
-	if (flock(fileno(score_fp), LOCK_EX) < 0) {
-		perror("flock");
-		return (-1);
-	}
+	if (flock(fileno(score_fp), LOCK_EX) < 0)
+		err(1, "flock");
 	snprintf(scanstr, 50, "%%%zus %%%zus %%d %%d %%d", sizeof(score[0].name)-1,
 	    sizeof(score[0].game)-1);
 	for (;;) {
@@ -143,13 +148,14 @@ log_score(int list_em)
 			break;
 	}
 	if (!test_mode && !list_em) {
-		if ((pw = (struct passwd *) getpwuid(getuid())) == NULL) {
-			fprintf(stderr, 
-				"getpwuid failed for uid %u.  Who are you?\n",
-				getuid());
-			return (-1);
-		}
-		strlcpy(thisscore.name, pw->pw_name, sizeof(thisscore.name));
+		name = getenv("LOGNAME");
+		if (name == NULL || *name == '\0')
+			name = getenv("USER");
+		if (name == NULL || *name == '\0')
+			name = getlogin();
+		if (name == NULL || *name == '\0')
+			name = "  ???";
+		strlcpy(thisscore.name, name, sizeof(thisscore.name));
 
 		cp = strrchr(file, '/');
 		if (cp == NULL) {
diff --git a/games/atc/main.c b/games/atc/main.c
index 032c93c7ab8..d67a5f454ad 100644
--- a/games/atc/main.c
+++ b/games/atc/main.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: main.c,v 1.24 2015/11/20 16:58:37 tb Exp $	*/
+/*	$OpenBSD: main.c,v 1.25 2015/11/29 15:23:38 tb Exp $	*/
 /*	$NetBSD: main.c,v 1.4 1995/04/27 21:22:25 mycroft Exp $	*/
 
 /*-
@@ -54,15 +54,12 @@ main(int argc, char *argv[])
 	const char		*file = NULL;
 	char			*seed;
 	struct sigaction	sa;
-	gid_t			gid;
 	struct itimerval	itv;
 
+	if (pledge("stdio rpath wpath cpath flock tty", NULL) == -1)
+		err(1, "pledge");
 	open_score_file();
 
-	/* revoke privs */
-	gid = getgid();
-	setresgid(gid, gid, gid);
-
 	start_time = time(0);
 	makenoise = 1;
 	seed = NULL;
diff --git a/games/atc/pathnames.h b/games/atc/pathnames.h
index 9c513682f8b..2f76ec10629 100644
--- a/games/atc/pathnames.h
+++ b/games/atc/pathnames.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: pathnames.h,v 1.3 2003/06/03 03:01:38 millert Exp $	*/
+/*	$OpenBSD: pathnames.h,v 1.4 2015/11/29 15:23:38 tb Exp $	*/
 /*	$NetBSD: pathnames.h,v 1.3 1995/03/21 15:04:28 cgd Exp $	*/
 
 /*-
@@ -35,4 +35,3 @@
 #include <paths.h>
 
 #define	_PATH_GAMES	"/usr/share/games/atc/"
-#define	_PATH_SCORE	"/var/games/atc_score"