-/* $NetBSD: machdep.c,v 1.7 1998/07/21 07:01:54 hubertf Exp $ */
+/* $NetBSD: machdep.c,v 1.20 2012/12/01 11:37:27 mbalmer Exp $ */
/*
* Copyright (c) 1988, 1993
* 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.
*
#if 0
static char sccsid[] = "@(#)machdep.c 8.1 (Berkeley) 5/31/93";
#else
-__RCSID("$NetBSD: machdep.c,v 1.7 1998/07/21 07:01:54 hubertf Exp $");
+__RCSID("$NetBSD: machdep.c,v 1.20 2012/12/01 11:37:27 mbalmer Exp $");
#endif
#endif /* not lint */
*
* All UNIX code should be included between the single "#ifdef UNIX" at the
* top of this file, and the "#endif" at the bottom.
- *
+ *
* To change a routine to include a new UNIX system, simply #ifdef the
* existing routine, as in the following example:
*
* #endif
* }
*
- * Appropriate variations of this are of course acceptible.
+ * Appropriate variations of this are of course acceptable.
* The use of "#elseif" is discouraged because of non-portability.
* If the correct #define doesn't exist, "UNIX_SYSV" in this case, make it up
* and insert it in the list at the top of the file. Alter the CFLAGS
*/
void
-md_slurp()
+md_slurp(void)
{
(void)fpurge(stdin);
}
*/
void
-md_heed_signals()
+md_heed_signals(void)
{
signal(SIGINT, onintr);
signal(SIGQUIT, byebye);
*/
void
-md_ignore_signals()
+md_ignore_signals(void)
{
signal(SIGQUIT, SIG_IGN);
signal(SIGINT, SIG_IGN);
*/
int
-md_get_file_id(fname)
- char *fname;
+md_get_file_id(const char *fname)
{
struct stat sbuf;
if (stat(fname, &sbuf)) {
return(-1);
}
- return((int) sbuf.st_ino);
+ return((int)sbuf.st_ino);
}
/* md_link_count():
*/
int
-md_link_count(fname)
-char *fname;
+md_link_count(const char *fname)
{
struct stat sbuf;
stat(fname, &sbuf);
- return((int) sbuf.st_nlink);
+ return((int)sbuf.st_nlink);
}
/* md_gct(): (Get Current Time)
* system doesn't provide all of the time units requested here, then you
* can provide only those that it does, and return zeros for the others.
* If you cannot provide good time values, then users may be able to copy
- * saved-game files and play them.
+ * saved-game files and play them.
*/
void
-md_gct(rt_buf)
- struct rogue_time *rt_buf;
+md_gct(struct rogue_time *rt_buf)
{
struct tm *t;
time_t seconds;
* exactly the same here.
* Or if md_gct() is implemented correctly, but your system does not provide
* file modification dates, you may return some date far in the past so
- * that the program will never know that a saved-game file being modified.
+ * that the program will never know that a saved-game file being modified.
* You may also do this if you wish to be able to restore games from
* saved-games that have been modified.
*/
void
-md_gfmt(fname, rt_buf)
- char *fname;
- struct rogue_time *rt_buf;
+md_gfmt(const char *fname, struct rogue_time *rt_buf)
{
struct stat sbuf;
time_t seconds;
struct tm *t;
stat(fname, &sbuf);
- seconds = (long) sbuf.st_mtime;
+ seconds = sbuf.st_mtime;
t = localtime(&seconds);
rt_buf->year = t->tm_year;
*/
boolean
-md_df(fname)
- char *fname;
+md_df(const char *fname)
{
if (unlink(fname)) {
return(0);
* function, but then the score file would only have one name in it.
*/
-char *
-md_gln()
+const char *
+md_gln(void)
{
struct passwd *p;
if (!(p = getpwuid(getuid())))
- return((char *)NULL);
- return(p->pw_name);
+ return NULL;
+ return p->pw_name;
}
/* md_sleep:
*/
void
-md_sleep(nsecs)
- int nsecs;
+md_sleep(int nsecs)
{
- (void) sleep(nsecs);
+ (void)sleep(nsecs);
}
/* md_getenv()
* values are strings, and each string is identified by a name. The names
* of the values needed, and their use, is as follows:
*
- * TERMCAP
- * The name of the users's termcap file, NOT the termcap entries
- * themselves. This is used ONLY if the program is compiled with
- * CURSES defined (-DCURSES). Even in this case, the program need
- * not find a string for TERMCAP. If it does not, it will use the
- * default termcap file as returned by md_gdtcf();
- * TERM
- * The name of the users's terminal. This is used ONLY if the program
- * is compiled with CURSES defined (-DCURSES). In this case, the string
- * value for TERM must be found, or the routines in curses.c cannot
- * function, and the program will quit.
* ROGUEOPTS
* A string containing the various game options. This need not be
* defined.
*
* If your system does not provide a means of searching for these values,
* you will have to do it yourself. None of the values above really need
- * to be defined except TERM when the program is compiled with CURSES
- * defined. In this case, as a bare minimum, you can check the 'name'
- * parameter, and if it is "TERM" find the terminal name and return that,
- * else return zero. If the program is not compiled with CURSES, you can
- * get by with simply always returning zero. Returning zero indicates
- * that their is no defined value for the given string.
+ * to be defined; you can get by with simply always returning zero.
+ * Returning zero indicates that their is no defined value for the
+ * given string.
*/
char *
-md_getenv(name)
- char *name;
+md_getenv(const char *name)
{
char *value;
* when no more memory can be allocated.
*/
-char *
-md_malloc(n)
- int n;
+void *
+md_malloc(size_t n)
{
char *t;
/* md_gseed() (Get Seed)
*
* This function returns a seed for the random number generator (RNG). This
- * seed causes the RNG to begin generating numbers at some point in it's
+ * seed causes the RNG to begin generating numbers at some point in its
* sequence. Without a random seed, the RNG will generate the same set
* of numbers, and every game will start out exactly the same way. A good
* number to use is the process id, given by getpid() on most UNIX systems.
* You need to find some single random integer, such as:
* process id.
* current time (minutes + seconds) returned from md_gct(), if implemented.
- *
+ *
* It will not help to return "get_rand()" or "rand()" or the return value of
* any pseudo-RNG. If you don't have a random number, you can just return 1,
* but this means your games will ALWAYS start the same way, and will play
*/
int
-md_gseed()
+md_gseed(void)
{
time_t seconds;
time(&seconds);
- return((int) seconds);
+ return((int)seconds);
}
/* md_exit():
*/
void
-md_exit(status)
- int status;
+md_exit(int status)
{
exit(status);
}
*/
void
-md_lock(l)
- boolean l;
+md_lock(boolean l)
{
- static int fd;
+ static int fd = -1;
short tries;
if (l) {
+ setegid(egid);
if ((fd = open(_PATH_SCOREFILE, O_RDONLY)) < 1) {
- message("cannot lock score file", 0);
+ setegid(gid);
+ messagef(0, "cannot lock score file");
return;
}
+ setegid(gid);
for (tries = 0; tries < 5; tries++)
if (!flock(fd, LOCK_EX|LOCK_NB))
return;
} else {
- (void)flock(fd, LOCK_NB);
+ (void)flock(fd, LOCK_UN|LOCK_NB);
(void)close(fd);
}
}
/* md_shell():
*
* This function spawns a shell for the user to use. When this shell is
- * terminated, the game continues. Since this program may often be run
- * setuid to gain access to privileged files, care is taken that the shell
- * is run with the user's REAL user id, and not the effective user id.
- * The effective user id is restored after the shell completes.
- */
-
-void
-md_shell(shell)
- char *shell;
-{
- int w;
-
- if (!fork()) {
- int uid;
-
- uid = getuid();
- setuid(uid);
- execl(shell, shell, 0);
- }
- wait(&w);
-}
-
-/* If you have a viable curses/termlib library, then use it and don't bother
- * implementing the routines below. And don't compile with -DCURSES.
- */
-
-#ifdef CURSES
-
-/* md_cbreak_no_echo_nonl:
- *
- * This routine sets up some terminal characteristics. The tty-driver
- * must be told to:
- * 1.) Not echo input.
- * 2.) Transmit input characters immediately upon typing. (cbreak mode)
- * 3.) Move the cursor down one line, without changing column, and
- * without generating a carriage-return, when it
- * sees a line-feed. This is only necessary if line-feed is ever
- * used in the termcap 'do' (cursor down) entry, in which case,
- * your system should must have a way of accomplishing this.
- *
- * When the parameter 'on' is true, the terminal is set up as specified
- * above. When this parameter is false, the terminal is restored to the
- * original state.
- *
- * Raw mode should not to be used. Keyboard signals/events/interrupts should
- * be sent, although they are not strictly necessary. See notes in
- * md_heed_signals().
- *
- * This function must be implemented for rogue to run properly if the
- * program is compiled with CURSES defined to use the enclosed curses
- * emulation package. If you are not using this, then this routine is
- * totally unnecessary.
- *
- * Notice that information is saved between calls. This is used to
- * restore the terminal to an initial saved state.
+ * terminated, the game continues.
*
+ * It is important that the game not give the shell the privileges the
+ * game uses to access the scores file. This version of the game runs
+ * with privileges low by default; only the saved gid (if setgid) or uid
+ * (if setuid) will be privileged, but that privilege is discarded by
+ * exec().
*/
void
-md_cbreak_no_echo_nonl(on)
- boolean on;
+md_shell(const char *shell)
{
- struct termios tty_buf;
- static struct termios tty_save;
-
- if (on) {
- tcgetattr(0, &tty_buf);
- tty_save = tty_buf;
- tty_buf.c_lflag &= ~(ICANON | ECHO);
- tty_buf.c_oflag &= ~ONLCR;
- tty_buf.c_cc[VMIN] = 1;
- tty_buf.c_cc[VTIME] = 2;
- tcsetattr(0, TCSADRAIN, &tty_buf);
- } else {
- tcsetattr(0, TCSADRAIN, &tty_save);
+ int w;
+ pid_t pid;
+
+ pid = fork();
+ switch (pid) {
+ case -1:
+ break;
+ case 0:
+ execl(shell, shell, (char *)NULL);
+ _exit(255);
+ default:
+ waitpid(pid, &w, 0);
+ break;
}
}
-/* md_gdtcf(): (Get Default Termcap File)
- *
- * This function is called ONLY when the program is compiled with CURSES
- * defined. If you use your system's curses/termlib library, this function
- * won't be called. On most UNIX systems, "/etc/termcap" suffices.
- *
- * If their is no such termcap file, then return 0, but in that case, you
- * must have a TERMCAP file returned from md_getenv("TERMCAP"). The latter
- * will override the value returned from md_gdtcf(). If the program is
- * compiled with CURSES defined, and md_gdtcf() returns 0, and
- * md_getenv("TERMCAP") returns 0, the program will have no terminal
- * capability information and will quit.
- */
-
-char *
-md_gdtcf()
-{
- return("/etc/termcap");
-}
-
-/* md_tstp():
- *
- * This function puts the game to sleep and returns to the shell. This
- * only applies to UNIX 4.2 and 4.3. For other systems, the routine should
- * be provided as a do-nothing routine. md_tstp() will only be referenced
- * in the code when compiled with CURSES defined.
- *
- */
-
-void
-md_tstp()
-{
-#ifdef UNIX_BSD4_2
- kill(0, SIGTSTP);
-#endif
-}
-
-#endif
-
-#endif
+#endif /* UNIX */
git.ckatri.com / bsdgames-darwin.git / blobdiff