Source:NetHack 3.6.1/src/mail.c
Jump to navigation
Jump to search
Below is the full text to mail.c from the source code of NetHack 3.6.1. To link to a particular line, write [[Source:NetHack 3.6.1/src/mail.c#line123]], for example.
Contents
Top of file
/* NetHack 3.6 mail.c $NHDT-Date: 1519070343 2018/02/19 19:59:03 $ $NHDT-Branch: NetHack-3.6.0 $:$NHDT-Revision: 1.31 $ */
/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/*-Copyright (c) Pasi Kallinen, 2018. */
/* NetHack may be freely redistributed. See license for details. */The NetHack General Public License applies to screenshots, source code and other content from NetHack.
This content was modified from the original NetHack source code distribution (by splitting up NetHack content between wiki pages, and possibly further editing). See the page history for a list of who changed it, and on what dates.
#include "hack.h"
#ifdef MAIL
#ifdef SIMPLE_MAIL
# include <fcntl.h>
# include <errno.h>
#endif /* SIMPLE_MAIL */
#include "mail.h"
/*
* Notify user when new mail has arrived. Idea by Merlyn Leroy.
*
* The mail daemon can move with less than usual restraint. It can:
* - move diagonally from a door
* - use secret and closed doors
* - run through a monster ("Gangway!", etc.)
* - run over pools & traps
*
* Possible extensions:
* - Open the file MAIL and do fstat instead of stat for efficiency.
* (But sh uses stat, so this cannot be too bad.)
* - Examine the mail and produce a scroll of mail named "From somebody".
* - Invoke MAILREADER in such a way that only this single mail is read.
* - Do something to the text when the scroll is enchanted or cancelled.
* - Make the daemon always appear at a stairwell, and have it find a
* path to the hero.
*
* Note by Olaf Seibert: On the Amiga, we usually don't get mail. So we go
* through most of the effects at 'random' moments.
* Note by Paul Winner: The MSDOS port also 'fakes' the mail daemon at
* random intervals.
*/
STATIC_DCL boolean FDECL(md_start, (coord *));
STATIC_DCL boolean FDECL(md_stop, (coord *, coord *));
STATIC_DCL boolean FDECL(md_rush, (struct monst *, int, int));
STATIC_DCL void FDECL(newmail, (struct mail_info *));
extern char *viz_rmin, *viz_rmax; /* line-of-sight limits (vision.c) */
#if !defined(UNIX) && !defined(VMS)
int mustgetmail = -1;
#endif
#ifdef UNIX
#include <sys/stat.h>
#include <pwd.h>
/* DON'T trust all Unices to declare getpwuid() in <pwd.h> */
#if !defined(_BULL_SOURCE) && !defined(__sgi) && !defined(_M_UNIX)
#if !defined(SUNOS4) && !(defined(ULTRIX) && defined(__GNUC__))
/* DO trust all SVR4 to typedef uid_t in <sys/types.h> (probably to a long) */
#if defined(POSIX_TYPES) || defined(SVR4) || defined(HPUX)
extern struct passwd *FDECL(getpwuid, (uid_t));
#else
extern struct passwd *FDECL(getpwuid, (int));
#endif
#endif
#endif
static struct stat omstat, nmstat;
static char *mailbox = (char *) 0;
static long laststattime;
#if !defined(MAILPATH) && defined(AMS) /* Just a placeholder for AMS */
#define MAILPATH "/dev/null"
#endif
#if !defined(MAILPATH) && (defined(LINUX) || defined(__osf__))
#define MAILPATH "/var/spool/mail/"
#endif
#if !defined(MAILPATH) && defined(__FreeBSD__)
#define MAILPATH "/var/mail/"
#endif
#if !defined(MAILPATH) && (defined(BSD) || defined(ULTRIX))
#define MAILPATH "/usr/spool/mail/"
#endif
#if !defined(MAILPATH) && (defined(SYSV) || defined(HPUX))
#define MAILPATH "/usr/mail/"
#endif
free_maildata
void
free_maildata()
{
if (mailbox)
free((genericptr_t) mailbox), mailbox = (char *) 0;
}
getmailstatus
void
getmailstatus()
{
if (mailbox) {
; /* no need to repeat the setup */
} else if ((mailbox = nh_getenv("MAIL")) != 0) {
mailbox = dupstr(mailbox);
#ifdef MAILPATH
} else {
#ifdef AMS
struct passwd ppasswd;
(void) memcpy(&ppasswd, getpwuid(getuid()), sizeof (struct passwd));
if (ppasswd.pw_dir) {
/* note: 'sizeof "LITERAL"' includes +1 for terminating '\0' */
mailbox = (char *) alloc((unsigned) (strlen(ppasswd.pw_dir)
+ sizeof AMS_MAILBOX));
Strcpy(mailbox, ppasswd.pw_dir);
Strcat(mailbox, AMS_MAILBOX);
}
#else
const char *pw_name = getpwuid(getuid())->pw_name;
/* note: 'sizeof "LITERAL"' includes +1 for terminating '\0' */
mailbox = (char *) alloc((unsigned) (strlen(pw_name)
+ sizeof MAILPATH));
Strcpy(mailbox, MAILPATH);
Strcat(mailbox, pw_name);
#endif /* AMS */
#endif /* MAILPATH */
}
debugpline3("mailbox=%c%s%c",
mailbox ? '\"' : '<',
mailbox ? mailbox : "null",
mailbox ? '\"' : '>');
if (mailbox && stat(mailbox, &omstat)) {
#ifdef PERMANENT_MAILBOX
pline("Cannot get status of MAIL=\"%s\".", mailbox);
free_maildata(); /* set 'mailbox' to Null */
#else
omstat.st_mtime = 0;
#endif
}
}
#endif /* UNIX */
md_start
/*
* Pick coordinates for a starting position for the mail daemon. Called
* from newmail() and newphone().
*/
STATIC_OVL boolean
md_start(startp)
coord *startp;
{
coord testcc; /* scratch coordinates */
int row; /* current row we are checking */
int lax; /* if TRUE, pick a position in sight. */
int dd; /* distance to current point */
int max_distance; /* max distance found so far */
/*
* If blind and not telepathic, then it doesn't matter what we pick ---
* the hero is not going to see it anyway. So pick a nearby position.
*/
if (Blind && !Blind_telepat) {
if (!enexto(startp, u.ux, u.uy, (struct permonst *) 0))
return FALSE; /* no good positions */
return TRUE;
}
/*
* Arrive at an up or down stairwell if it is in line of sight from the
* hero.
*/
if (couldsee(upstair.sx, upstair.sy)) {
startp->x = upstair.sx;
startp->y = upstair.sy;
return TRUE;
}
if (couldsee(dnstair.sx, dnstair.sy)) {
startp->x = dnstair.sx;
startp->y = dnstair.sy;
return TRUE;
}
/*
* Try to pick a location out of sight next to the farthest position away
* from the hero. If this fails, try again, just picking the farthest
* position that could be seen. What we really ought to be doing is
* finding a path from a stairwell...
*
* The arrays viz_rmin[] and viz_rmax[] are set even when blind. These
* are the LOS limits for each row.
*/
lax = 0; /* be picky */
max_distance = -1;
retry:
for (row = 0; row < ROWNO; row++) {
if (viz_rmin[row] < viz_rmax[row]) {
/* There are valid positions on this row. */
dd = distu(viz_rmin[row], row);
if (dd > max_distance) {
if (lax) {
max_distance = dd;
startp->y = row;
startp->x = viz_rmin[row];
} else if (enexto(&testcc, (xchar) viz_rmin[row], row,
(struct permonst *) 0)
&& !cansee(testcc.x, testcc.y)
&& couldsee(testcc.x, testcc.y)) {
max_distance = dd;
*startp = testcc;
}
}
dd = distu(viz_rmax[row], row);
if (dd > max_distance) {
if (lax) {
max_distance = dd;
startp->y = row;
startp->x = viz_rmax[row];
} else if (enexto(&testcc, (xchar) viz_rmax[row], row,
(struct permonst *) 0)
&& !cansee(testcc.x, testcc.y)
&& couldsee(testcc.x, testcc.y)) {
max_distance = dd;
*startp = testcc;
}
}
}
}
if (max_distance < 0) {
if (!lax) {
lax = 1; /* just find a position */
goto retry;
}
return FALSE;
}
return TRUE;
}
md_stop
/*
* Try to choose a stopping point as near as possible to the starting
* position while still adjacent to the hero. If all else fails, try
* enexto(). Use enexto() as a last resort because enexto() chooses
* its point randomly, which is not what we want.
*/
STATIC_OVL boolean
md_stop(stopp, startp)
coord *stopp; /* stopping position (we fill it in) */
coord *startp; /* starting position (read only) */
{
int x, y, distance, min_distance = -1;
for (x = u.ux - 1; x <= u.ux + 1; x++)
for (y = u.uy - 1; y <= u.uy + 1; y++) {
if (!isok(x, y) || (x == u.ux && y == u.uy))
continue;
if (accessible(x, y) && !MON_AT(x, y)) {
distance = dist2(x, y, startp->x, startp->y);
if (min_distance < 0 || distance < min_distance
|| (distance == min_distance && rn2(2))) {
stopp->x = x;
stopp->y = y;
min_distance = distance;
}
}
}
/* If we didn't find a good spot, try enexto(). */
if (min_distance < 0 && !enexto(stopp, u.ux, u.uy, &mons[PM_MAIL_DAEMON]))
return FALSE;
return TRUE;
}
/* Let the mail daemon have a larger vocabulary. */
static NEARDATA const char *mail_text[] = { "Gangway!", "Look out!",
"Pardon me!" };
#define md_exclamations() (mail_text[rn2(3)])
md_rush
/*
* Make the mail daemon run through the dungeon. The daemon will run over
* any monsters that are in its path, but will replace them later. Return
* FALSE if the md gets stuck in a position where there is a monster. Return
* TRUE otherwise.
*/
STATIC_OVL boolean
md_rush(md, tx, ty)
struct monst *md;
register int tx, ty; /* destination of mail daemon */
{
struct monst *mon; /* displaced monster */
register int dx, dy; /* direction counters */
int fx = md->mx, fy = md->my; /* current location */
int nfx = fx, nfy = fy, /* new location */
d1, d2; /* shortest distances */
/*
* It is possible that the monster at (fx,fy) is not the md when:
* the md rushed the hero and failed, and is now starting back.
*/
if (m_at(fx, fy) == md) {
remove_monster(fx, fy); /* pick up from orig position */
newsym(fx, fy);
}
/*
* At the beginning and exit of this loop, md is not placed in the
* dungeon.
*/
while (1) {
/* Find a good location next to (fx,fy) closest to (tx,ty). */
d1 = dist2(fx, fy, tx, ty);
for (dx = -1; dx <= 1; dx++)
for (dy = -1; dy <= 1; dy++)
if ((dx || dy) && isok(fx + dx, fy + dy)
&& !IS_STWALL(levl[fx + dx][fy + dy].typ)) {
d2 = dist2(fx + dx, fy + dy, tx, ty);
if (d2 < d1) {
d1 = d2;
nfx = fx + dx;
nfy = fy + dy;
}
}
/* Break if the md couldn't find a new position. */
if (nfx == fx && nfy == fy)
break;
fx = nfx; /* this is our new position */
fy = nfy;
/* Break if the md reaches its destination. */
if (fx == tx && fy == ty)
break;
if ((mon = m_at(fx, fy)) != 0) /* save monster at this position */
verbalize1(md_exclamations());
else if (fx == u.ux && fy == u.uy)
verbalize("Excuse me.");
place_monster(md, fx, fy); /* put md down */
newsym(fx, fy); /* see it */
flush_screen(0); /* make sure md shows up */
delay_output(); /* wait a little bit */
/* Remove md from the dungeon. Restore original mon, if necessary. */
if (mon) {
if ((mon->mx != fx) || (mon->my != fy))
place_worm_seg(mon, fx, fy);
else
place_monster(mon, fx, fy);
} else
remove_monster(fx, fy);
newsym(fx, fy);
}
/*
* Check for a monster at our stopping position (this is possible, but
* very unlikely). If one exists, then have the md leave in disgust.
*/
if ((mon = m_at(fx, fy)) != 0) {
place_monster(md, fx, fy); /* display md with text below */
newsym(fx, fy);
verbalize("This place's too crowded. I'm outta here.");
if ((mon->mx != fx) || (mon->my != fy)) /* put mon back */
place_worm_seg(mon, fx, fy);
else
place_monster(mon, fx, fy);
newsym(fx, fy);
return FALSE;
}
place_monster(md, fx, fy); /* place at final spot */
newsym(fx, fy);
flush_screen(0);
delay_output(); /* wait a little bit */
return TRUE;
}
newmail
/* Deliver a scroll of mail. */
/*ARGSUSED*/
STATIC_OVL void
newmail(info)
struct mail_info *info;
{
struct monst *md;
coord start, stop;
boolean message_seen = FALSE;
/* Try to find good starting and stopping places. */
if (!md_start(&start) || !md_stop(&stop, &start))
goto give_up;
/* Make the daemon. Have it rush towards the hero. */
if (!(md = makemon(&mons[PM_MAIL_DAEMON], start.x, start.y, NO_MM_FLAGS)))
goto give_up;
if (!md_rush(md, stop.x, stop.y))
goto go_back;
message_seen = TRUE;
verbalize("%s, %s! %s.", Hello(md), plname, info->display_txt);
if (info->message_typ) {
struct obj *obj = mksobj(SCR_MAIL, FALSE, FALSE);
if (info->object_nam)
obj = oname(obj, info->object_nam);
if (info->response_cmd)
new_omailcmd(obj, info->response_cmd);
if (distu(md->mx, md->my) > 2)
verbalize("Catch!");
display_nhwindow(WIN_MESSAGE, FALSE);
obj = hold_another_object(obj, "Oops!", (const char *) 0,
(const char *) 0);
}
/* zip back to starting location */
go_back:
(void) md_rush(md, start.x, start.y);
mongone(md);
/* deliver some classes of messages even if no daemon ever shows up */
give_up:
if (!message_seen && info->message_typ == MSG_OTHER)
pline("Hark! \"%s.\"", info->display_txt);
}
#if !defined(UNIX) && !defined(VMS)
ckmailstatus
void
ckmailstatus()
{
if (u.uswallow || !flags.biff)
return;
if (mustgetmail < 0) {
#if defined(AMIGA) || defined(MSDOS) || defined(TOS)
mustgetmail = (moves < 2000) ? (100 + rn2(2000)) : (2000 + rn2(3000));
#endif
return;
}
if (--mustgetmail <= 0) {
static struct mail_info deliver = {
MSG_MAIL, "I have some mail for you", 0, 0
};
newmail(&deliver);
mustgetmail = -1;
}
}
/*ARGSUSED*/readmail
void
readmail(otmp)
struct obj *otmp UNUSED;
{
static char *junk[] = {
NULL, /* placeholder for "Report bugs to <devteam@nethack.org>.", */
"Please disregard previous letter.", "Welcome to NetHack.",
#ifdef AMIGA
"Only Amiga makes it possible.", "CATS have all the answers.",
#endif
"This mail complies with the Yendorian Anti-Spam Act (YASA)",
"Please find enclosed a small token to represent your Owlbear",
"**FR33 P0T10N 0F FULL H34L1NG**",
"Please return to sender (Asmodeus)",
"Buy a potion of gain level for only $19.99! Guaranteed to be blessed!",
"Invitation: Visit the NetHack web site at http://www.nethack.org!"
};
/* XXX replace with more general substitution code and add local
* contact message. Also use DEVTEAM_URL */
if (junk[0] == NULL) {
#define BUGS_FORMAT "Report bugs to <%s>."
/* +2 from '%s' suffices as substitute for usual +1 for terminator */
junk[0] = (char *) alloc(strlen(BUGS_FORMAT) + strlen(DEVTEAM_EMAIL));
Sprintf(junk[0], BUGS_FORMAT, DEVTEAM_EMAIL);
#undef BUGS_FORMAT
}
if (Blind) {
pline("Unfortunately you cannot see what it says.");
} else
pline("It reads: \"%s\"", junk[rn2(SIZE(junk))]);
}
#endif /* !UNIX && !VMS */
#ifdef UNIX
ckmailstatus
void
ckmailstatus()
{
ck_server_admin_msg();
if (!mailbox || u.uswallow || !flags.biff
#ifdef MAILCKFREQ
|| moves < laststattime + MAILCKFREQ
#endif
)
return;
laststattime = moves;
if (stat(mailbox, &nmstat)) {
#ifdef PERMANENT_MAILBOX
pline("Cannot get status of MAIL=\"%s\" anymore.", mailbox);
free_maildata();
#else
nmstat.st_mtime = 0;
#endif
} else if (nmstat.st_mtime > omstat.st_mtime) {
if (nmstat.st_size) {
static struct mail_info deliver = {
#ifndef NO_MAILREADER
MSG_MAIL, "I have some mail for you",
#else
/* suppress creation and delivery of scroll of mail */
MSG_OTHER, "You have some mail in the outside world",
#endif
0, 0
};
newmail(&deliver);
}
getmailstatus(); /* might be too late ... */
}
}
#if defined(SIMPLE_MAIL) || defined(SERVER_ADMIN_MSG)read_simplemail
void
read_simplemail(mbox, adminmsg)
char *mbox;
boolean adminmsg;
{
FILE* mb = fopen(mbox, "r");
char curline[128], *msg;
boolean seen_one_already = FALSE;
#ifdef SIMPLE_MAIL
struct flock fl = { 0 };
#endif
const char *msgfrom = adminmsg
? "The voice of %s booms through the caverns:"
: "This message is from '%s'.";
if (!mb)
goto bail;
#ifdef SIMPLE_MAIL
fl.l_type = F_RDLCK;
fl.l_whence = SEEK_SET;
fl.l_start = 0;
fl.l_len = 0;
errno = 0;
#endif
/* Allow this call to block. */
if (!adminmsg
#ifdef SIMPLE_MAIL
&& fcntl (fileno (mb), F_SETLKW, &fl) == -1
#endif
)
goto bail;
while (fgets(curline, 128, mb) != NULL) {
if (!adminmsg) {
#ifdef SIMPLE_MAIL
fl.l_type = F_UNLCK;
fcntl (fileno(mb), F_UNLCK, &fl);
#endif
pline("There is a%s message on this scroll.",
seen_one_already ? "nother" : "");
}
msg = strchr(curline, ':');
if (!msg)
goto bail;
*msg = '\0';
msg++;
msg[strlen(msg) - 1] = '\0'; /* kill newline */
pline(msgfrom, curline);
if (adminmsg)
verbalize(msg);
else
pline("It reads: \"%s\".", msg);
seen_one_already = TRUE;
#ifdef SIMPLE_MAIL
errno = 0;
if (!adminmsg) {
fl.l_type = F_RDLCK;
fcntl(fileno(mb), F_SETLKW, &fl);
}
#endif
}
#ifdef SIMPLE_MAIL
if (!adminmsg) {
fl.l_type = F_UNLCK;
fcntl(fileno(mb), F_UNLCK, &fl);
}
#endif
fclose(mb);
if (adminmsg)
display_nhwindow(WIN_MESSAGE, TRUE);
else
unlink(mailbox);
return;
bail:
/* bail out _professionally_ */
if (!adminmsg)
pline("It appears to be all gibberish.");
}
#endif /* SIMPLE_MAIL */
ck_server_admin_msg
void
ck_server_admin_msg()
{
#ifdef SERVER_ADMIN_MSG
static struct stat ost,nst;
static long lastchk = 0;
if (moves < lastchk + SERVER_ADMIN_MSG_CKFREQ) return;
lastchk = moves;
if (!stat(SERVER_ADMIN_MSG, &nst)) {
if (nst.st_mtime > ost.st_mtime)
read_simplemail(SERVER_ADMIN_MSG, TRUE);
ost.st_mtime = nst.st_mtime;
}
#endif /* SERVER_ADMIN_MSG */
}
/*ARGSUSED*/readmail
void
readmail(otmp)
struct obj *otmp UNUSED;
{
#ifdef DEF_MAILREADER /* This implies that UNIX is defined */
register const char *mr = 0;
#endif /* DEF_MAILREADER */
#ifdef SIMPLE_MAIL
read_simplemail(mailbox, FALSE);
return;
#endif /* SIMPLE_MAIL */
#ifdef DEF_MAILREADER /* This implies that UNIX is defined */
display_nhwindow(WIN_MESSAGE, FALSE);
if (!(mr = nh_getenv("MAILREADER")))
mr = DEF_MAILREADER;
if (child(1)) {
(void) execl(mr, mr, (char *) 0);
nh_terminate(EXIT_FAILURE);
}
#else
#ifndef AMS /* AMS mailboxes are directories */
display_file(mailbox, TRUE);
#endif /* AMS */
#endif /* DEF_MAILREADER */
/* get new stat; not entirely correct: there is a small time
window where we do not see new mail */
getmailstatus();
}
#endif /* UNIX */
#ifdef VMS
extern NDECL(struct mail_info *parse_next_broadcast);
volatile int broadcasts = 0;
ckmailstatus
void
ckmailstatus()
{
struct mail_info *brdcst;
if (u.uswallow || !flags.biff)
return;
while (broadcasts > 0) { /* process all trapped broadcasts [until] */
broadcasts--;
if ((brdcst = parse_next_broadcast()) != 0) {
newmail(brdcst);
break; /* only handle one real message at a time */
}
}
}
readmail
void
readmail(otmp)
struct obj *otmp;
{
#ifdef SHELL /* can't access mail reader without spawning subprocess */
const char *txt, *cmd;
char *p, buf[BUFSZ] = DUMMY, qbuf[BUFSZ];
int len;
/* there should be a command in OMAILCMD */
if (has_oname(otmp))
txt = ONAME(otmp);
else
txt = "";
len = strlen(txt);
if (has_omailcmd(otmp))
cmd = OMAILCMD(otmp);
if (!cmd || !*cmd)
cmd = "SPAWN";
Sprintf(qbuf, "System command (%s)", cmd);
getlin(qbuf, buf);
if (*buf != '\033') {
for (p = eos(buf); p > buf; *p = '\0')
if (*--p != ' ')
break; /* strip trailing spaces */
if (*buf)
cmd = buf; /* use user entered command */
if (!strcmpi(cmd, "SPAWN") || !strcmp(cmd, "!"))
cmd = (char *) 0; /* interactive escape */
vms_doshell(cmd, TRUE);
(void) sleep(1);
}
#else
nhUse(otmp);
#endif /* SHELL */
}
#endif /* VMS */
#endif /* MAIL */
/*mail.c*/