s/saftey/safety/

[bsdgames-darwin.git] / dm / dm.c

diff --git a/dm/dm.c b/dm/dm.c
index bbd0c447ee6129dc44089b260f6cd0f7c43b714e..e2f7b36cd97c6a567f2f78222f56b7c03fe363f2 100644 (file)
--- a/dm/dm.c
+++ b/dm/dm.c
@@ -1,6 +1,8 @@
+/*     $NetBSD: dm.c,v 1.29 2009/08/27 00:22:28 dholland Exp $ */
+

 /*
 /*

- * Copyright (c) 1987 Regents of the University of California.
- * All rights reserved.
+ * Copyright (c) 1987, 1993
+ *     The Regents of the University of California.  All rights reserved.

  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions


@@ -10,11 +12,7 @@
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.

- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *     This product includes software developed by the University of
- *     California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
+ * 3. Neither the name of the University nor the names of its contributors

  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *


@@ -31,49 +29,70 @@
  * SUCH DAMAGE.
  */
 
  * SUCH DAMAGE.
  */
 

+#include <sys/cdefs.h>

 #ifndef lint
 #ifndef lint

-char copyright[] =
-"@(#) Copyright (c) 1987 Regents of the University of California.\n\
- All rights reserved.\n";
+__COPYRIGHT("@(#) Copyright (c) 1987, 1993\
+ The Regents of the University of California.  All rights reserved.");

 #endif /* not lint */
 
 #ifndef lint
 #endif /* not lint */
 
 #ifndef lint

-static char sccsid[] = "@(#)dm.c       5.16 (Berkeley) 2/28/91";
+#if 0
+static char sccsid[] = "@(#)dm.c       8.1 (Berkeley) 5/31/93";
+#else
+__RCSID("$NetBSD: dm.c,v 1.29 2009/08/27 00:22:28 dholland Exp $");
+#endif

 #endif /* not lint */
 
 #include <sys/param.h>
 #include <sys/file.h>
 #include <sys/time.h>
 #include <sys/resource.h>
 #endif /* not lint */
 
 #include <sys/param.h>
 #include <sys/file.h>
 #include <sys/time.h>
 #include <sys/resource.h>

+
+#include <err.h>
+#include <ctype.h>
+#include <errno.h>

 #include <pwd.h>
 #include <pwd.h>

-#include <utmp.h>
-#include <nlist.h>

 #include <stdio.h>
 #include <stdio.h>

-#include <ctype.h>
+#include <stdlib.h>

 #include <string.h>
 #include <string.h>

+#include <time.h>
+#include <unistd.h>
+
+#include "utmpentry.h"

 #include "pathnames.h"
 
 #include "pathnames.h"
 

-extern int errno;

 static time_t  now;                    /* current time value */
 static int     priority = 0;           /* priority game runs at */
 static char    *game,                  /* requested game */
                *gametty;               /* from tty? */
 
 static time_t  now;                    /* current time value */
 static int     priority = 0;           /* priority game runs at */
 static char    *game,                  /* requested game */
                *gametty;               /* from tty? */
 

-/*ARGSUSED*/
-main(argc, argv)
-       int argc;
-       char **argv;
+static void c_day(const char *, const char *, const char *);
+static void c_game(const char *, const char  *, const char *, const char *);
+static void c_tty(const char *);
+static const char *hour(int);
+static double load(void);
+static void nogamefile(void);
+static void play(char **) __dead;
+static void read_config(void);
+static int users(void);
+
+#ifdef LOG
+static void logfile(void);
+#endif
+
+int
+main(int argc __unused, char *argv[])

 {
 {

-       char *cp, *rindex(), *ttyname();
-       time_t time();
+       char *cp;

 
        nogamefile();
 
        nogamefile();

-       game = (cp = rindex(*argv, '/')) ? ++cp : *argv;
+       game = (cp = strrchr(*argv, '/')) ? ++cp : *argv;

 
        if (!strcmp(game, "dm"))
                exit(0);
 
        gametty = ttyname(0);
 
        if (!strcmp(game, "dm"))
                exit(0);
 
        gametty = ttyname(0);

+       unsetenv("TZ");

        (void)time(&now);
        read_config();
 #ifdef LOG
        (void)time(&now);
        read_config();
 #ifdef LOG


@@ -81,32 +100,31 @@ main(argc, argv)
 #endif
        play(argv);
        /*NOTREACHED*/
 #endif
        play(argv);
        /*NOTREACHED*/

+       return (0);

 }
 
 /*
  * play --
  *     play the game
  */
 }
 
 /*
  * play --
  *     play the game
  */

-play(args)
-       char **args;
+static void
+play(char **args)

 {
        char pbuf[MAXPATHLEN];
 
 {
        char pbuf[MAXPATHLEN];
 

-       (void)strcpy(pbuf, _PATH_HIDE);
-       (void)strcpy(pbuf + sizeof(_PATH_HIDE) - 1, game);
+       snprintf(pbuf, sizeof(pbuf), "%s%s", _PATH_HIDE, game);

        if (priority > 0)       /* < 0 requires root */
                (void)setpriority(PRIO_PROCESS, 0, priority);
        if (priority > 0)       /* < 0 requires root */
                (void)setpriority(PRIO_PROCESS, 0, priority);

-       setgid(getgid());       /* we run setgid kmem; lose it */

        execv(pbuf, args);
        execv(pbuf, args);

-       (void)fprintf(stderr, "dm: %s: %s\n", pbuf, strerror(errno));
-       exit(1);
+       err(1, "%s", pbuf);

 }
 
 /*
  * read_config --
  *     read through config file, looking for key words.
  */
 }
 
 /*
  * read_config --
  *     read through config file, looking for key words.
  */

-read_config()
+static void
+read_config(void)

 {
        FILE *cfp;
        char lbuf[BUFSIZ], f1[40], f2[40], f3[40], f4[40], f5[40];
 {
        FILE *cfp;
        char lbuf[BUFSIZ], f1[40], f2[40], f3[40], f4[40], f5[40];


@@ -114,21 +132,21 @@ read_config()
        if (!(cfp = fopen(_PATH_CONFIG, "r")))
                return;
        while (fgets(lbuf, sizeof(lbuf), cfp))
        if (!(cfp = fopen(_PATH_CONFIG, "r")))
                return;
        while (fgets(lbuf, sizeof(lbuf), cfp))

-               switch(*lbuf) {
+               switch (*lbuf) {

                case 'b':               /* badtty */
                case 'b':               /* badtty */

-                       if (sscanf(lbuf, "%s%s", f1, f2) != 2 ||
+                       if (sscanf(lbuf, "%39s%39s", f1, f2) != 2 ||

                            strcasecmp(f1, "badtty"))
                                break;
                        c_tty(f2);
                        break;
                case 'g':               /* game */
                            strcasecmp(f1, "badtty"))
                                break;
                        c_tty(f2);
                        break;
                case 'g':               /* game */

-                       if (sscanf(lbuf, "%s%s%s%s%s",
+                       if (sscanf(lbuf, "%39s%39s%39s%39s%39s",

                            f1, f2, f3, f4, f5) != 5 || strcasecmp(f1, "game"))
                                break;
                        c_game(f2, f3, f4, f5);
                        break;
                case 't':               /* time */
                            f1, f2, f3, f4, f5) != 5 || strcasecmp(f1, "game"))
                                break;
                        c_game(f2, f3, f4, f5);
                        break;
                case 't':               /* time */

-                       if (sscanf(lbuf, "%s%s%s%s", f1, f2, f3, f4) != 4 ||
+                       if (sscanf(lbuf, "%39s%39s%39s%39s", f1, f2, f3, f4) != 4 ||

                            strcasecmp(f1, "time"))
                                break;
                        c_day(f2, f3, f4);
                            strcasecmp(f1, "time"))
                                break;
                        c_day(f2, f3, f4);


@@ -140,10 +158,10 @@ read_config()
  * c_day --
  *     if day is today, see if okay to play
  */
  * c_day --
  *     if day is today, see if okay to play
  */

-c_day(s_day, s_start, s_stop)
-       char *s_day, *s_start, *s_stop;
+static void
+c_day(const char *s_day, const char *s_start, const char *s_stop)

 {
 {

-       static char *days[] = {
+       static const char *const days[] = {

                "sunday", "monday", "tuesday", "wednesday",
                "thursday", "friday", "saturday",
        };
                "sunday", "monday", "tuesday", "wednesday",
                "thursday", "friday", "saturday",
        };


@@ -154,17 +172,17 @@ c_day(s_day, s_start, s_stop)
                ct = localtime(&now);
        if (strcasecmp(s_day, days[ct->tm_wday]))
                return;
                ct = localtime(&now);
        if (strcasecmp(s_day, days[ct->tm_wday]))
                return;

-       if (!isdigit(*s_start) || !isdigit(*s_stop))
+       if (!isdigit((unsigned char)*s_start) || 
+           !isdigit((unsigned char)*s_stop))

                return;
        start = atoi(s_start);
        stop = atoi(s_stop);
        if (ct->tm_hour >= start && ct->tm_hour < stop) {
                return;
        start = atoi(s_start);
        stop = atoi(s_stop);
        if (ct->tm_hour >= start && ct->tm_hour < stop) {

-               fputs("dm: Sorry, games are not available from ", stderr);
-               hour(start);
-               fputs(" to ", stderr);
-               hour(stop);
-               fputs(" today.\n", stderr);
-               exit(0);
+               if (start == 0 && stop == 24)
+                       errx(0, "Sorry, games are not available today.");
+               else
+                       errx(0, "Sorry, games are not available from %s to %s today.",
+                            hour(start), hour(stop));

        }
 }
 
        }
 }
 


@@ -172,48 +190,41 @@ c_day(s_day, s_start, s_stop)
  * c_tty --
  *     decide if this tty can be used for games.
  */
  * c_tty --
  *     decide if this tty can be used for games.
  */

-c_tty(tty)
-       char *tty;
+static void
+c_tty(const char *tty)

 {
        static int first = 1;
        static char *p_tty;
 {
        static int first = 1;
        static char *p_tty;

-       char *rindex();

 
        if (first) {
 
        if (first) {

-               p_tty = rindex(gametty, '/');
+               p_tty = strrchr(gametty, '/');

                first = 0;
        }
 
                first = 0;
        }
 

-       if (!strcmp(gametty, tty) || p_tty && !strcmp(p_tty, tty)) {
-               fprintf(stderr, "dm: Sorry, you may not play games on %s.\n", gametty);
-               exit(0);
-       }
+       if (!strcmp(gametty, tty) || (p_tty && !strcmp(p_tty, tty)))
+               errx(1, "Sorry, you may not play games on %s.", gametty);

 }
 
 /*
  * c_game --
  *     see if game can be played now.
  */
 }
 
 /*
  * c_game --
  *     see if game can be played now.
  */

-c_game(s_game, s_load, s_users, s_priority)
-       char *s_game, *s_load, *s_users, *s_priority;
+static void
+c_game(const char *s_game, const char *s_load, const char *s_users, 
+       const char *s_priority)

 {
        static int found;
 {
        static int found;

-       double load();

 
        if (found)
                return;
        if (strcmp(game, s_game) && strcasecmp("default", s_game))
                return;
        ++found;
 
        if (found)
                return;
        if (strcmp(game, s_game) && strcasecmp("default", s_game))
                return;
        ++found;

-       if (isdigit(*s_load) && atoi(s_load) < load()) {
-               fputs("dm: Sorry, the load average is too high right now.\n", stderr);
-               exit(0);
-       }
-       if (isdigit(*s_users) && atoi(s_users) <= users()) {
-               fputs("dm: Sorry, there are too many users logged on right now.\n", stderr);
-               exit(0);
-       }
-       if (isdigit(*s_priority))
+       if (isdigit((unsigned char)*s_load) && atoi(s_load) < load())
+               errx(0, "Sorry, the load average is too high right now.");
+       if (isdigit((unsigned char)*s_users) && atoi(s_users) <= users())
+               errx(0, "Sorry, there are too many users logged on right now.");
+       if (isdigit((unsigned char)*s_priority))

                priority = atoi(s_priority);
 }
 
                priority = atoi(s_priority);
 }
 


@@ -221,16 +232,14 @@ c_game(s_game, s_load, s_users, s_priority)
  * load --
  *     return 15 minute load average
  */
  * load --
  *     return 15 minute load average
  */

-double
-load()
+static double
+load(void)

 {
        double avenrun[3];
 
 {
        double avenrun[3];
 

-       if (getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0])) < 0) {
-               fputs("dm: getloadavg() failed.\n", stderr);
-               exit(1);
-       }
-       return(avenrun[2]);
+       if (getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0])) < 0)
+               err(1, "getloadavg() failed");
+       return (avenrun[2]);

 }
 
 /*
 }
 
 /*


@@ -239,26 +248,20 @@ load()
  *     todo: check idle time; if idle more than X minutes, don't
  *     count them.
  */
  *     todo: check idle time; if idle more than X minutes, don't
  *     count them.
  */

-users()
+static int
+users(void)

 {
 {

-       
-       register int nusers, utmp;
-       struct utmp buf;
+       struct utmpentry *ep;
+       int nusers;

 
 

-       if ((utmp = open(_PATH_UTMP, O_RDONLY, 0)) < 0) {
-               (void)fprintf(stderr, "dm: %s: %s\n",
-                   _PATH_UTMP, strerror(errno));
-               exit(1);
-       }
-       for (nusers = 0; read(utmp, (char *)&buf, sizeof(struct utmp)) > 0;)
-               if (buf.ut_name[0] != '\0')
-                       ++nusers;
-       return(nusers);
+       nusers = getutentries(NULL, &ep);
+       return nusers;

 }
 
 }
 

-nogamefile()
+static void
+nogamefile(void)

 {
 {

-       register int fd, n;
+       int fd, n;

        char buf[BUFSIZ];
 
        if ((fd = open(_PATH_NOGAMES, O_RDONLY, 0)) >= 0) {
        char buf[BUFSIZ];
 
        if ((fd = open(_PATH_NOGAMES, O_RDONLY, 0)) >= 0) {


@@ -274,22 +277,19 @@ nogamefile()
  * hour --
  *     print out the hour in human form
  */
  * hour --
  *     print out the hour in human form
  */

-hour(h)
-       int h;
+static const char *
+hour(int h)

 {
 {

-       switch(h) {
-       case 0:
-               fputs("midnight", stderr);
-               break;
-       case 12:
-               fputs("noon", stderr);
-               break;
-       default:
-               if (h > 12)
-                       fprintf(stderr, "%dpm", h - 12);
-               else
-                       fprintf(stderr, "%dam", h);
-       }
+       static const char *const hours[] = {
+           "midnight", "1am", "2am", "3am", "4am", "5am",
+           "6am", "7am", "8am", "9am", "10am", "11am",
+           "noon", "1pm", "2pm", "3pm", "4pm", "5pm",
+           "6pm", "7pm", "8pm", "9pm", "10pm", "11pm", "midnight" };
+
+       if (h < 0 || h > 24)
+               return ("BAD TIME");
+       else
+               return (hours[h]);

 }
 
 #ifdef LOG
 }
 
 #ifdef LOG


@@ -297,32 +297,32 @@ hour(h)
  * logfile --
  *     log play of game
  */
  * logfile --
  *     log play of game
  */

-logfile()
+static void
+logfile(void)

 {
 {

-       struct passwd *pw, *getpwuid();
+       struct passwd *pw;

        FILE *lp;
        uid_t uid;
        int lock_cnt;
        FILE *lp;
        uid_t uid;
        int lock_cnt;

-       char *ctime();

 
        if (lp = fopen(_PATH_LOG, "a")) {
                for (lock_cnt = 0;; ++lock_cnt) {
                        if (!flock(fileno(lp), LOCK_EX))
                                break;
                        if (lock_cnt == 4) {
 
        if (lp = fopen(_PATH_LOG, "a")) {
                for (lock_cnt = 0;; ++lock_cnt) {
                        if (!flock(fileno(lp), LOCK_EX))
                                break;
                        if (lock_cnt == 4) {

-                               perror("dm: log lock");
+                               warnx("log lock");

                                (void)fclose(lp);
                                return;
                        }
                                (void)fclose(lp);
                                return;
                        }

-                       sleep((u_int)1);
+                       sleep(1);

                }
                if (pw = getpwuid(uid = getuid()))
                        fputs(pw->pw_name, lp);
                else
                        fprintf(lp, "%u", uid);
                fprintf(lp, "\t%s\t%s\t%s", game, gametty, ctime(&now));
                }
                if (pw = getpwuid(uid = getuid()))
                        fputs(pw->pw_name, lp);
                else
                        fprintf(lp, "%u", uid);
                fprintf(lp, "\t%s\t%s\t%s", game, gametty, ctime(&now));

-               (void)fclose(lp);

                (void)flock(fileno(lp), LOCK_UN);
                (void)flock(fileno(lp), LOCK_UN);

+               (void)fclose(lp);

        }
 }
 #endif /* LOG */
        }
 }
 #endif /* LOG */