...and lo, a Great Renaming came upon the land, the like of which shall not be seen again

1 files changed, 0 insertions, 754 deletions

diff --git a/jsmond.c b/jsmond.c
deleted file mode 100644
index a7b8d40..0000000
--- a/jsmond.c
+++ /dev/null
@@ -1,754 +0,0 @@
-/* need this, or else we don't get a prototype for strdup() from string.h */
-#define _XOPEN_SOURCE 500
-
-#include <string.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <limits.h>
-#include <errno.h>
-
-#include <X11/X.h>
-#include <X11/Xlib.h>
-#include <X11/extensions/XTest.h>
-
-#include <linux/joystick.h>
-#include <sys/inotify.h>
-
-/* microseconds to wait between sending a keypresss
-   or mouse click event and its release */
-#define EVENT_DELAY 100000
-
-/* if we can't find an unused keycode in the X keymap, use this one */
-#define FALLBACK_KEYCODE 255
-
-/* min/max allowed keycodes. really this should be queried from
-   the X server, but for Xorg this value is good enough for
-   argument checking. the max is 0xff as keycodes are 8 bit unsigned. */
-#define MIN_KEYCODE 8
-#define MAX_KEYCODE 255
-
-/* same as above, for mouse buttons. */
-#define MIN_BUTTON 1
-#define MAX_BUTTON 10
-
-/* command for -x */
-#define X_COMMAND "xscreensaver-command -deactivate"
-
-/* default "-i 250ms" */
-#define DEFAULT_INTERVAL 250
-
-typedef enum {
-	fm_auto_keycode, fm_keycode, fm_button, fm_motion, fm_cmd
-} fake_mode_t;
-
-/* user options */
-int interval = DEFAULT_INTERVAL; /* -i (always in millisec) */
-int debug = 0;                   /* -D */
-int keycode = -1;                /* -k */
-int button = -1;                 /* -b */
-char *event_dir = EVENTDIR;      /* -d */
-char *js_node_name = JSNODE;     /* -j */
-int autodiscover = 1; /* cleared if user supplies joydev args */
-fake_mode_t fake_mode = fm_auto_keycode;  /* -k, -b, -m */
-char *c_command = NULL;          /* -c, -x */
-int monitor_joysticks = 1;       /* -F */
-int monitor_fullscreen = 0;      /* -f, -F */
-
-/* joystick stuff */
-char *joynames[MAX_STICKS + 1];
-int last_joyname = 0;
-int joyfds[MAX_STICKS + 1];
-
-/* executable name, for warnings/errors */
-const char *self;
-
-/* X stuff */
-Display *xdisp;
-
-/* inotify stuff */
-int inotify_fd, watch_fd;
-char inotify_buf[sizeof(struct inotify_event) + NAME_MAX + 1];
-struct inotify_event *inotify_ev = (struct inotify_event *)inotify_buf;
-
-/* not going to include pages of usage info duplicating the man page */
-void usage(void) {
-	printf("jsmond v" VERSION " by B. Watson, WTFPL\n");
-	printf("Usage: %s [-i interval] [-b button | -k keycode] [-j name]\n", self);
-	printf("              [-d dir] [-D] [joystick [...]]\n");
-	printf("Built-in defaults: MAX_STICKS=%d, -d " EVENTDIR ", -j " JSNODE "\n", MAX_STICKS);
-	printf("See man page for details\n");
-	exit(0);
-}
-
-void die(const char *msg) {
-	fprintf(stderr, "%s: %s\n", self, msg);
-	exit(1);
-}
-
-/* make some trivial Xlib call that will result in Xlib killing
-   this process if it fails. XNoOp looks like it was meant for
-   exactly this, but it keeps returning 1 even if the X server is killed. */
-void ping_x_server(void) {
-	(void)XPending(xdisp);
-	if(debug) fprintf(stderr, "X server is still alive\n");
-}
-
-void send_fake_key(void) {
-	if(debug) fprintf(stderr, "sending keycode %d\n", keycode);
-
-	/* press... */
-	XTestFakeKeyEvent(xdisp, keycode, 1, 0L);
-	XSync(xdisp, 0);
-
-	/* ...wait 1/10 sec... */
-	usleep(EVENT_DELAY);
-
-	/* ...release */
-	XTestFakeKeyEvent(xdisp, keycode, 0, 0L);
-	XSync(xdisp, 0);
-}
-
-void send_fake_click(void) {
-	if(debug) fprintf(stderr, "sending button %d click\n", button);
-
-	/* press... */
-	XTestFakeButtonEvent(xdisp, button, 1, 0L);
-	XSync(xdisp, 0);
-
-	/* ...wait 1/10 sec... */
-	usleep(EVENT_DELAY);
-
-	/* ...release */
-	XTestFakeButtonEvent(xdisp, button, 0, 0L);
-	XSync(xdisp, 0);
-}
-
-/* XXX: the man page documents XTestFakeRelativeMotionEvent()
-   as taking 5 arguments (2nd one is screen_number), but Xtst.h
-	only has 4 (with no screen_number arg). */
-void send_fake_motion(void) {
-	int oldx, oldy, ignoreme;
-	Window win_ignoreme;
-
-	if(debug) fprintf(stderr, "sending mouse motion\n");
-
-	XQueryPointer(
-			xdisp,
-			DefaultRootWindow(xdisp),
-			&win_ignoreme,
-			&win_ignoreme,
-			&oldx,
-			&oldy,
-			&ignoreme,
-			&ignoreme,
-			(unsigned int *)&ignoreme);
-
-	if(debug) fprintf(stderr, "oldx %d, oldy %d\n", oldx, oldy);
-
-	/* move... */
-	XTestFakeRelativeMotionEvent(xdisp, 10, 10, 0L);
-	XSync(xdisp, 0);
-
-	/* ...wait 1/10 sec... */
-	usleep(EVENT_DELAY);
-
-	/* ...move back */
-	XTestFakeRelativeMotionEvent(xdisp, -10, -10, 0L);
-	XSync(xdisp, 0);
-
-	/* we've moved all 4 directions now. but if were were too close
-	   to an edge of the screen, the mouse pointer isn't where it
-	   started. so: */
-	XWarpPointer(
-			xdisp,
-			None,
-			DefaultRootWindow(xdisp),
-			0,
-			0,
-			0,
-			0,
-			oldx,
-			oldy);
-	XSync(xdisp, 0);
-}
-
-void exec_command(void) {
-	if(!c_command)
-		die("BUG: c_command is NULL\n");
-
-	if(debug) fprintf(stderr, "executing \"%s\"\n", c_command);
-	system(c_command);
-}
-
-void send_fake_x_event(void) {
-	switch(fake_mode) {
-		case fm_keycode:
-			send_fake_key();
-			break;
-		case fm_button:
-			send_fake_click();
-			break;
-		case fm_motion:
-			send_fake_motion();
-			break;
-		case fm_cmd:
-			exec_command();
-			break;
-		default: /* This Never Happens(tm) */
-			fprintf(stderr, "%s: BUG: fake_mode %d isn't a valid fake_mode_t!\n",
-					self, fake_mode);
-			exit(1);
-			break;
-	}
-}
-
-void open_joysticks(void) {
-	int fdcount, i;
-	struct js_event e;
-
-	fdcount = 0;
-	for(i = 0; i < last_joyname; i++) {
-		int synthev = 0;
-		if(joyfds[i] > -1) close(joyfds[i]);
-		joyfds[i] = open(joynames[i], O_RDONLY | O_NONBLOCK);
-		if(joyfds[i] > -1) {
-			fdcount++;
-			while( (read(joyfds[i], &e, sizeof(e)) > 0) && (e.type & JS_EVENT_INIT) )
-				synthev++;
-			if(debug)
-				fprintf(stderr, "opened %s, fd %d, skipped %d synthetic events\n",
-						joynames[i], joyfds[i], synthev);
-		}
-	}
-	if(debug) fprintf(stderr, "opened %d devices\n", fdcount);
-}
-
-void check_inotify() {
-	int res;
-
-	res = read(inotify_fd, inotify_buf, sizeof(inotify_buf) + NAME_MAX + 1);
-
-	if(res > 0) {
-		if(debug) {
-			fprintf(stderr, "read %d bytes from inotify_fd\n", res);
-			if(!inotify_ev->len) {
-				fprintf(stderr, "got event with no name: 0x%x\n", inotify_ev->mask);
-			} else {
-				fprintf(stderr, "got event with name %s: 0x%x\n", inotify_ev->name, inotify_ev->mask);
-			}
-		}
-
-		/* not much we can do to recover from this: */
-		if(inotify_ev->mask & IN_DELETE_SELF) {
-			die("someone deleted our device directory!");
-		}
-
-		/* ...or this: */
-		if(inotify_ev->mask & IN_UNMOUNT) {
-			die("someone unmounted our device directory!");
-		}
-
-		usleep(EVENT_DELAY); /* might not need, be paranoid */
-		open_joysticks();
-	} else {
-		if(errno != EAGAIN) {
-			/* not sure what could cause this, so no idea how/if we
-			   recover from it */
-			fprintf(stderr, "%s: failed to read from inotify_fd: %s\n",
-					self, strerror(errno));
-			exit(1);
-		}
-	}
-}
-
-int get_joystick_activity(void) {
-	struct js_event e;
-	int i, active = 0;
-
-	for(i = 0; i < last_joyname; i++) {
-		if(joyfds[i] < 0) continue;
-
-		if(debug) fprintf(stderr, "reading device %d, fd %d\n", i, joyfds[i]);
-
-		/* count events. any we get here *should* be real, but it doesn't
-			hurt to mask out synthetic ones again */
-		while(read(joyfds[i], &e, sizeof(e)) > 0) {
-			if(!(e.type & JS_EVENT_INIT)) active++;
-		}
-
-		/* EAGAIN just means there are no more events to read.
-			anything else is a problem, though not fatal */
-		if(errno != EAGAIN) {
-			if(debug) fprintf(stderr, "got error on device %d: %s\n", i, strerror(errno));
-		}
-	}
-
-	return active;
-}
-
-/* supposedly we could use the X window property _NET_WINDOW_FULLSCREEN
-   to detect a fullscreen window, but not everything actually sets that.
-   so a fullscreen window is defined here as:
-   - visible
-   - is the size of the root window
-   - and has input focus.
-*/
-int have_fullscreen_window(void) {
-	Window w;
-	XWindowAttributes w_attrs, root_attrs;
-	int revert_to;
-
-	/* man page doesn't document the actual
-	   return value, it says "int", is it really a Status? */
-	if(!XGetInputFocus(xdisp, &w, &revert_to)) {
-		if(debug) fprintf(stderr, "XGetInputFocus() failed\n");
-		return 0;
-	}
-
-	/* no window has focus (not an error) */
-	if(w == None)
-		return 0;
-
-	/* TODO: under what conditions does this fail? if it does fail once,
-		will it ever succeed again?
-
-		Hopefully, using w_attrs.root will do the right thing in multi-screen
-		environments. I can't easily test it though. */
-	if( XGetWindowAttributes(xdisp, w, &w_attrs) &&
-	    XGetWindowAttributes(xdisp, w_attrs.root, &root_attrs) )
-	{
-
-		if(debug)
-			fprintf(stderr,
-					"window id 0x%x (root 0x%x) has focus, map_state %d, geometry %dx%d\n",
-					(int)w, (int)w_attrs.root, w_attrs.map_state, w_attrs.width, w_attrs.height);
-
-		if( (w_attrs.map_state == IsViewable) &&
-				(root_attrs.width == w_attrs.width) &&
-				(root_attrs.height == w_attrs.height) )
-		{
-			if(debug) fprintf(stderr,
-					"window id 0x%x has input focus and looks fullscreen (%dx%d)\n",
-					(int)w, w_attrs.width, w_attrs.height);
-			return 1;
-		}
-	} else if(debug) {
-		if(debug) fprintf(stderr, "XGetWindowAttributes() failed\n");
-		return 0;
-	}
-
-	return 0;
-}
-
-/* this is the point of no return. the only way out of main_loop()
-   is process death. */
-void main_loop(void) {
-	int sleep_us;
-
-	sleep_us = interval * 1000;
-	fprintf(stderr, "entering main_loop(), sleep_us %d\n", sleep_us);
-
-	while(1) {
-		int active = 0;
-
-		/* Xlib will obligingly kill us, if X goes away */
-		ping_x_server();
-
-		/* check_inotify() will close & reopen the joystick fds as needed */
-		if(monitor_joysticks)
-			check_inotify();
-
-		/* let the fds gather events as we slumber */
-		if(debug) fprintf(stderr, "sleeping %dms...\n", interval);
-		usleep(sleep_us);
-
-		/* now see if any of them got any events while we took a nap */
-		if(monitor_joysticks)
-			active += get_joystick_activity();
-
-		if(monitor_fullscreen)
-			active += have_fullscreen_window();
-
-		/* if we got any activity on any of the fds, do our thing */
-		if(active) {
-			if(debug) fprintf(stderr, "*** got activity!\n");
-			send_fake_x_event();
-		} else if(debug) fprintf(stderr, "no activity\n");
-	}
-}
-
-/* make self point to our executable name without any directory */
-void set_exe_name(const char *argv0) {
-	const char *p;
-	self = argv0;
-	for(p = self; *p; p++)
-		if(p[0] == '/' && p[1]) self = p + 1;
-}
-
-char *make_joystick_name(int js) {
-	static char buf[PATH_MAX + 1];
-	sprintf(buf, "%s/%s%d", event_dir, js_node_name, js);
-	return buf;
-}
-
-/* add a joystick by pathname or number. note this only gets
-   called once, at startup: the list never gets modified after that. */
-void add_joystick_name(const char *name) {
-	if(last_joyname >= MAX_STICKS) {
-		fprintf(stderr,
-				"%s: too many device names, monitoring only the first %d\n",
-				self,
-				last_joyname);
-		return;
-	}
-
-	if(*name >= '0' && *name <= '9') {
-		add_joystick_name(make_joystick_name(atoi(name)));
-		return;
-	}
-
-	if( !(joynames[last_joyname] = strdup(name)) )
-		die(strerror(errno));
-
-	if(debug)
-		fprintf(stderr, "added device name %d: %s\n", last_joyname, name);
-
-	last_joyname++;
-}
-
-void populate_joynames(void) {
-	int i;
-
-	for(i = 0; i < MAX_STICKS; i++) {
-		add_joystick_name(make_joystick_name(i));
-	}
-}
-
-void set_fake_mode(fake_mode_t newmode) {
-	if(fake_mode != fm_auto_keycode)
-		die("use only one of the -k -b -m options");
-	else
-		fake_mode = newmode;
-}
-
-int set_interval(const char *arg) {
-	char *end;
-
-	interval = strtol(arg, &end, 0);
-
-	/* no digits at all */
-	if(end == arg) return 0;
-
-	/* no 0 or negative */
-	if(interval < 1) return 0;
-
-	/* digits only */
-	switch(*end) {
-		case '\0':
-			/* digits only, try to guess */
-			if(interval < 100) {
-				fprintf(stderr,
-						"%s: treating -i %d as %d seconds (use -i %dms if you meant %dms)\n",
-						self, interval, interval, interval, interval);
-				/* fall through */
-			} else {
-				break;
-			}
-		case 's':  interval *= 1000; break; /* sec */
-		case 'm':  break; /* ms, use as-is */
-	}
-
-	if(debug) fprintf(stderr, "interval set to %dms\n", interval);
-	return 1;
-}
-
-void parse_args(int argc, char **argv) {
-	char *nextarg;
-
-	if(argc > 1 && strcmp(argv[1], "--help") == 0) usage();
-
-	while(++argv, --argc) {
-		if(argv[0][0] != '-') {
-			/* no dash, treat as a joystick device */
-			add_joystick_name(*argv);
-			autodiscover = 0;
-		} else {
-			if(argv[0][1] && argv[0][2])
-				die("spaces required between options and arguments, please");
-			nextarg = argv[1];
-			switch(argv[0][1]) {
-				case 'm':
-					set_fake_mode(fm_motion);
-					break;
-				case 'k':
-					if(nextarg &&
-							(keycode = atoi(nextarg)) &&
-							(keycode >= MIN_KEYCODE) &&
-							(keycode <= MAX_KEYCODE) )
-					{
-						set_fake_mode(fm_keycode);
-						argv++, argc--;
-					} else {
-						fprintf(stderr, "%s: -k requires a keycode argument, %d-%d\n",
-								self, MIN_KEYCODE, MAX_KEYCODE);
-						exit(1);
-					}
-					break;
-				case 'b':
-					if(nextarg) button = atoi(nextarg);
-					if ( (button >= MIN_BUTTON) && (button <= MAX_BUTTON) ) {
-						set_fake_mode(fm_button);
-						argv++, argc--;
-					} else {
-						fprintf(stderr, "%s: -b requires a mouse button argument, %d-%d\n",
-								self, MIN_BUTTON, MAX_BUTTON);
-						exit(1);
-					}
-					break;
-				case 'i':
-					if(nextarg && set_interval(nextarg))
-						argv++, argc--;
-					else
-						die("-i requires a positive integer argument in milliseconds");
-					break;
-				case 'd':
-					if(nextarg) {
-						event_dir = nextarg;
-						argv++, argc--;
-					} else {
-						die("-d requires a directory argument");
-					}
-					break;
-				case 'j':
-					if(nextarg) {
-						js_node_name = nextarg;
-						argv++, argc--;
-					} else {
-						die("-j requires a string argument");
-					}
-					break;
-				case 'D':
-					debug = 1;
-					break;
-				case 'c':
-					if(nextarg) {
-						set_fake_mode(fm_cmd);
-						c_command = nextarg;
-						argv++, argc--;
-					} else {
-						die("-c requires a command argument");
-					}
-					break;
-				case 'x':
-					set_fake_mode(fm_cmd);
-					c_command = X_COMMAND;
-					break;
-				case 'F':
-					monitor_joysticks = 0; /* and fall thru */
-				case 'f':
-					monitor_fullscreen = 1;
-					break;
-				default:
-					die("unrecognized argument, try --help");
-					break;
-			}
-		}
-	}
-}
-
-/* make ourselves a daemon, double-fork technique.
-   verbose comments are not here because I think you need them, they're
-   here for me so I don't forget what this gibberish is for... */
-void daemonize(void) {
-	pid_t pid;
-
-	if((pid = fork()) < 0) {
-		/* in parent, fork failed */
-		fprintf(stderr, "%s: %s\n", self, strerror(errno));
-		die("failed to daemonize");
-	} else if(pid) {
-		/* in parent, fork succeeded */
-		exit(0);
-	}
-
-	/* now we're in the child, aka the 2nd generation parent.
-      the only reason for the first fork() was because setsid() can't
-	   be run in the parent process */
-	if( (setsid() < 0) ) {
-		fprintf(stderr, "%s: %s\n", self, strerror(errno));
-		die("failed to daemonize");
-	}
-
-	/* go on, do it again */
-	if((pid = fork()) < 0) {
-		/* in 2nd gen parent, fork failed */
-		fprintf(stderr, "%s: %s\n", self, strerror(errno));
-		die("failed to daemonize");
-	} else if(pid) {
-		/* in 2nd gen parent, fork succeeded */
-		fprintf(stderr, "%s: daemonized, PID %u\n", self, pid);
-		exit(0);
-	}
-
-	/* now we're in the grandchild, and we no longer need stdin/out/err */
-	close(0);
-	close(1);
-	close(2);
-
-	/* do this so we don't keep a filesystem from being umounted because
-		it's still busy (as our cwd) */
-	chdir("/");
-}
-
-/* helpers for init_* functions */
-void connect_to_x(void) {
-	int ignoreme;
-
-	if(debug) fprintf(stderr, "connecting to X server...\n");
-
-	xdisp = XOpenDisplay(getenv("DISPLAY"));
-
-	if(!xdisp) die("can't connect to X server");
-	if(debug) fprintf(stderr, "connected to X server\n");
-
-	if(XTestQueryExtension(xdisp, &ignoreme, &ignoreme, &ignoreme, &ignoreme)) {
-		if(debug) fprintf(stderr, "X server supports XTest extension, good\n");
-	} else {
-		die("X server doesn't support XTest extension\n");
-	}
-}
-
-/* XXX: XKeycodeToKeysym() is deprecated. I must learn XKB. */
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
-KeySym get_keysym(int i) {
-	return XKeycodeToKeysym(xdisp, i, 0);
-}
-#pragma GCC diagnostic pop
-
-/* the goggles, they do nothing! */
-void find_keycode() {
-	int i, min_code = 0, max_code = 0;
-	
-	/* man page doesn't document the return value */
-	(void)XDisplayKeycodes(xdisp, &min_code, &max_code);
-
-	if(debug) fprintf(stderr, "XDisplayKeycodes min %d, max %d\n", min_code, max_code);
-
-	for(i = min_code; i <= max_code; i++) {
-		if(get_keysym(i) == NoSymbol) {
-			keycode = i;
-			if(debug) fprintf(stderr, "using keycode %d\n", keycode);
-			break;
-		}
-	}
-
-	if(keycode < 0) {
-		fprintf(stderr,
-				"%s: can't find a free keycode in the keymap, using %d\n",
-				self, FALLBACK_KEYCODE);
-		keycode = FALLBACK_KEYCODE;
-	}
-}
-
-/* the device name check is mostly to guard against typos */
-void check_joyname(int i) {
-	if(joynames[i] && (strncmp(event_dir, joynames[i], strlen(event_dir)) != 0)) {
-		fprintf(stderr, "%s: device %s is not in event dir %s\n",
-				self, joynames[i], event_dir);
-		exit(1);
-	}
-}
-
-/* init_* functions. these are only called once each, from main() */
-void init_joysticks(void) {
-	int i;
-
-	for(i = 0; i < MAX_STICKS; i++) {
-		joyfds[i] = -1;
-		check_joyname(i);
-	}
-
-	open_joysticks();
-}
-
-void init_inotify(void) {
-	inotify_fd = inotify_init1(IN_NONBLOCK);
-	if(inotify_fd < 0) {
-		fprintf(stderr, "%s: inotify_init1() failed: %s",
-				self, strerror(errno));
-		exit(1);
-	}
-
-	if(debug) fprintf(stderr, "inotify_init1() returned %d\n", inotify_fd);
-
-	watch_fd = inotify_add_watch(
-			inotify_fd,
-			event_dir,
-			IN_CREATE | IN_DELETE | IN_DELETE_SELF);
-
-	if(watch_fd < 0) {
-		fprintf(stderr, "%s: inotify_add_watch(\"%s\") failed: %s\n",
-				self, event_dir, strerror(errno));
-		exit(1);
-	}
-
-	if(debug) fprintf(stderr, "inotify_add_watch() on %s returned %d\n", event_dir, inotify_fd);
-}
-
-void init_x(void) {
-	connect_to_x();
-
-	if(fake_mode == fm_auto_keycode) {
-		find_keycode();
-		fake_mode = fm_keycode;
-	}
-
-	/* do this now, before daemonizing. if something's wrong, Xlib
-	   will kill us. we'd better let that happen while we still have a
-	   stderr, so the user can see what happened. */
-	send_fake_x_event();
-}
-
-void print_banner() {
-	const char *m;
-
-	if(monitor_joysticks && monitor_fullscreen) {
-		m = "joysticks and fullscreen";
-	} else if(monitor_joysticks) {
-		m = "joysticks only";
-	} else if(monitor_fullscreen) {
-		m = "fullscreen only";
-	} else {
-		die("nothing to monitor!");
-	}
-
-	fprintf(stderr, "%s: v%s monitoring %s, interval %dms\n",
-			self, VERSION, m, interval);
-}
-
-int main(int argc, char **argv) {
-	set_exe_name(argv[0]);
-
-	parse_args(argc, argv);
-
-	print_banner();
-
-	if(monitor_joysticks) {
-		if(autodiscover) populate_joynames();
-		init_joysticks();
-		init_inotify();
-	}
-
-	init_x();
-
-	if(!debug) daemonize();
-
-	main_loop();
-
-	return 0;
-}