Mercurial > hg > early-roguelike
view rogue3/daemon.c @ 162:600873555ec0
Don't swap signal handlers in md_shellescape().
md_shellescape() sets SIGINT and SIGQUIT to be ignored, storing the
previous handlers, and restores them after the shell exits. But it
mixed up the two handlers.
Since the signals were usually handled by the same function, this fix
doesn't have much effect, but anything that makes signal code less
confusing is a good thing.
author | John "Elwin" Edwards |
---|---|
date | Mon, 08 Jun 2015 10:01:25 -0400 |
parents | 527e2150eaf0 |
children |
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/* * Contains functions for dealing with things that happen in the * future. * * @(#)daemon.c 3.3 (Berkeley) 6/15/81 * * Rogue: Exploring the Dungeons of Doom * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman * All rights reserved. * * See the file LICENSE.TXT for full copyright and licensing information. */ #include "curses.h" #include "rogue.h" #define EMPTY 0 #define DAEMON -1 #define MAXDAEMONS 20 #define _X_ { EMPTY } struct delayed_action d_list[MAXDAEMONS] = { _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, }; /* * d_slot: * Find an empty slot in the daemon/fuse list */ struct delayed_action * d_slot() { register int i; register struct delayed_action *dev; for (i = 0, dev = d_list; i < MAXDAEMONS; i++, dev++) if (dev->d_type == EMPTY) return dev; debug("Ran out of fuse slots"); return NULL; } /* * find_slot: * Find a particular slot in the table */ struct delayed_action * find_slot(void (*func)()) { register int i; register struct delayed_action *dev; for (i = 0, dev = d_list; i < MAXDAEMONS; i++, dev++) if (dev->d_type != EMPTY && func == dev->d_func) return dev; return NULL; } /* * daemon: * Start a daemon, takes a function. */ void start_daemon(void (*func)(), int arg, int type) { register struct delayed_action *dev; dev = d_slot(); if (dev != NULL) { dev->d_type = type; dev->d_func = func; dev->d_arg = arg; dev->d_time = DAEMON; } } /* * kill_daemon: * Remove a daemon from the list */ void kill_daemon(void (*func)()) { register struct delayed_action *dev; if ((dev = find_slot(func)) == NULL) return; /* * Take it out of the list */ dev->d_type = EMPTY; } /* * do_daemons: * Run all the daemons that are active with the current flag, * passing the argument to the function. */ void do_daemons(int flag) { register struct delayed_action *dev; /* * Loop through the devil list */ for (dev = d_list; dev <= &d_list[MAXDAEMONS-1]; dev++) /* * Executing each one, giving it the proper arguments */ if (dev->d_type == flag && dev->d_time == DAEMON) (*dev->d_func)(dev->d_arg); } /* * fuse: * Start a fuse to go off in a certain number of turns */ void fuse(void (*func)(), int arg, int time, int type) { register struct delayed_action *wire; wire = d_slot(); if (wire != NULL) { wire->d_type = type; wire->d_func = func; wire->d_arg = arg; wire->d_time = time; } } /* * lengthen: * Increase the time until a fuse goes off */ void lengthen(void (*func)(), int xtime) { register struct delayed_action *wire; if ((wire = find_slot(func)) == NULL) return; wire->d_time += xtime; } /* * extinguish: * Put out a fuse */ void extinguish(void (*func)()) { register struct delayed_action *wire; if ((wire = find_slot(func)) == NULL) return; wire->d_type = EMPTY; } /* * do_fuses: * Decrement counters and start needed fuses */ void do_fuses(int flag) { register struct delayed_action *wire; /* * Step though the list */ for (wire = d_list; wire <= &d_list[MAXDAEMONS-1]; wire++) { /* * Decrementing counters and starting things we want. We also need * to remove the fuse from the list once it has gone off. */ if (flag == wire->d_type && wire->d_time > 0 && --wire->d_time == 0) { wire->d_type = EMPTY; (*wire->d_func)(wire->d_arg); } } }