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author | Simon Rettberg | 2018-10-16 10:08:48 +0200 |
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committer | Simon Rettberg | 2018-10-16 10:08:48 +0200 |
commit | d3a98cf6cbc3bd0b9efc570f58e8812c03931c18 (patch) | |
tree | cbddf8e50f35a9c6e878a5bfe3c6d625d99e12ba /driver/xscreensaver-command.c | |
download | xscreensaver-d3a98cf6cbc3bd0b9efc570f58e8812c03931c18.tar.gz xscreensaver-d3a98cf6cbc3bd0b9efc570f58e8812c03931c18.tar.xz xscreensaver-d3a98cf6cbc3bd0b9efc570f58e8812c03931c18.zip |
Original 5.40
Diffstat (limited to 'driver/xscreensaver-command.c')
-rw-r--r-- | driver/xscreensaver-command.c | 450 |
1 files changed, 450 insertions, 0 deletions
diff --git a/driver/xscreensaver-command.c b/driver/xscreensaver-command.c new file mode 100644 index 0000000..f4a855d --- /dev/null +++ b/driver/xscreensaver-command.c @@ -0,0 +1,450 @@ +/* xscreensaver-command, Copyright (c) 1991-2013 Jamie Zawinski <jwz@jwz.org> + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation. No representations are made about the suitability of this + * software for any purpose. It is provided "as is" without express or + * implied warranty. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include <stdio.h> +#include <stdlib.h> +#include <time.h> +#include <sys/time.h> +#include <sys/types.h> + +#ifdef HAVE_UNISTD_H +# include <unistd.h> +#endif + +/* #include <X11/Xproto.h> / * for CARD32 */ +#include <X11/Xlib.h> +#include <X11/Xatom.h> +#include <X11/Xutil.h> /* for XGetClassHint() */ +#include <X11/Xos.h> + +#include <X11/Intrinsic.h> /* only needed to get through xscreensaver.h */ + + +/* You might think that to read an array of 32-bit quantities out of a + server-side property, you would pass an array of 32-bit data quantities + into XGetWindowProperty(). You would be wrong. You have to use an array + of longs, even if long is 64 bits (using 32 of each 64.) + */ +typedef long PROP32; + +#include "remote.h" +#include "version.h" + +#ifdef _VROOT_H_ +ERROR! you must not include vroot.h in this file +#endif + +char *progname; + +Atom XA_VROOT; +Atom XA_SCREENSAVER, XA_SCREENSAVER_VERSION, XA_SCREENSAVER_RESPONSE; +Atom XA_SCREENSAVER_ID, XA_SCREENSAVER_STATUS, XA_SELECT, XA_DEMO, XA_EXIT; +Atom XA_BLANK, XA_LOCK; +static Atom XA_ACTIVATE, XA_DEACTIVATE, XA_CYCLE, XA_NEXT, XA_PREV; +static Atom XA_RESTART, XA_PREFS, XA_THROTTLE, XA_UNTHROTTLE; + +static char *screensaver_version; +# ifdef __GNUC__ + __extension__ /* don't warn about "string length is greater than the + length ISO C89 compilers are required to support" in the + usage string... */ +# endif +static char *usage = "\n\ +usage: %s -<option>\n\ +\n\ + This program provides external control of a running xscreensaver process.\n\ + Version %s, copyright (c) 1991-%s Jamie Zawinski <jwz@jwz.org>.\n\ +\n\ + The xscreensaver program is a daemon that runs in the background.\n\ + You control a running xscreensaver process by sending it messages\n\ + with this program, xscreensaver-command. See the man pages for\n\ + details. These are the arguments understood by xscreensaver-command:\n\ +\n\ + -demo Ask the xscreensaver process to enter interactive demo mode.\n\ +\n\ + -prefs Ask the xscreensaver process to bring up the preferences\n\ + panel.\n\ +\n\ + -activate Turn on the screensaver (blank the screen), as if the user\n\ + had been idle for long enough.\n\ +\n\ + -deactivate Turns off the screensaver (un-blank the screen), as if user\n\ + activity had been detected.\n\ +\n\ + -cycle If the screensaver is active (the screen is blanked), then\n\ + stop the current graphics demo and run a new one (chosen\n\ + randomly.)\n\ +\n\ + -next Like either -activate or -cycle, depending on which is more\n\ + appropriate, except that the graphics hack that will be run\n\ + is the next one in the list, instead of a randomly-chosen\n\ + one. In other words, repeatedly executing -next will cause\n\ + the xscreensaver process to invoke each graphics demo\n\ + sequentially. (Though using the -demo option is probably\n\ + an easier way to accomplish that.)\n\ +\n\ + -prev Like -next, but goes in the other direction.\n\ +\n\ + -select <N> Like -activate, but runs the Nth element in the list of\n\ + hacks. By knowing what is in the `programs' list, and in\n\ + what order, you can use this to activate the screensaver\n\ + with a particular graphics demo. (The first element in the\n\ + list is numbered 1, not 0.)\n\ +\n\ + -exit Causes the xscreensaver process to exit gracefully.\n\ + This does nothing if the display is currently locked.\n\ + (Note that one must *never* kill xscreensaver with -9!)\n\ +\n\ + -restart Causes the screensaver process to exit and then restart with\n\ + the same command line arguments as last time. You shouldn't\n\ + really need to do this, since xscreensaver notices when the\n\ + .xscreensaver file has changed and re-reads it as needed.\n\ +\n\ + -lock Tells the running xscreensaver process to lock the screen\n\ + immediately. This is like -activate, but forces locking as\n\ + well, even if locking is not the default. If the saver is\n\ + already active, this causes it to be locked as well.\n\ +\n\ + -version Prints the version of xscreensaver that is currently running\n\ + on the display -- that is, the actual version number of the\n\ + running xscreensaver background process, rather than the\n\ + version number of xscreensaver-command.\n\ +\n\ + -time Prints the time at which the screensaver last activated or\n\ + deactivated (roughly, how long the user has been idle or\n\ + non-idle -- but not quite, since it only tells you when the\n\ + screen became blanked or un-blanked.)\n\ +\n\ + -watch Prints a line each time the screensaver changes state: when\n\ + the screen blanks, locks, unblanks, or when the running hack\n\ + is changed. This option never returns; it is intended for\n\ + use by shell scripts that want to react to the screensaver\n\ + in some way.\n\ +\n\ + See the man page for more details.\n\ + For updates, check https://www.jwz.org/xscreensaver/\n\ +\n"; + +/* Note: The "-throttle" command is deprecated -- it predates the XDPMS + extension. Instead of using -throttle, users should instead just + power off the monitor (e.g., "xset dpms force off".) In a few + minutes, the xscreensaver daemon will notice that the monitor is + off, and cease running hacks. + */ + +#define USAGE() do { \ + fprintf (stderr, usage, progname, screensaver_version, year); exit (1); \ + } while(0) + +static int watch (Display *); + +int +main (int argc, char **argv) +{ + Display *dpy; + int i; + char *dpyname = 0; + Atom *cmd = 0; + long arg = 0L; + char *s; + Atom XA_WATCH = 0; /* kludge: not really an atom */ + char year[5]; + + progname = argv[0]; + s = strrchr (progname, '/'); + if (s) progname = s+1; + + screensaver_version = (char *) malloc (5); + memcpy (screensaver_version, screensaver_id + 17, 4); + screensaver_version [4] = 0; + + s = strchr (screensaver_id, '-'); + s = strrchr (s, '-'); + s++; + strncpy (year, s, 4); + year[4] = 0; + + for (i = 1; i < argc; i++) + { + const char *s = argv [i]; + int L; + if (s[0] == '-' && s[1] == '-') s++; + L = strlen (s); + if (L < 2) USAGE (); + if (!strncmp (s, "-display", L)) dpyname = argv [++i]; + else if (cmd) USAGE(); + else if (!strncmp (s, "-activate", L)) cmd = &XA_ACTIVATE; + else if (!strncmp (s, "-deactivate", L)) cmd = &XA_DEACTIVATE; + else if (!strncmp (s, "-cycle", L)) cmd = &XA_CYCLE; + else if (!strncmp (s, "-next", L)) cmd = &XA_NEXT; + else if (!strncmp (s, "-prev", L)) cmd = &XA_PREV; + else if (!strncmp (s, "-select", L)) cmd = &XA_SELECT; + else if (!strncmp (s, "-exit", L)) cmd = &XA_EXIT; + else if (!strncmp (s, "-restart", L)) cmd = &XA_RESTART; + else if (!strncmp (s, "-demo", L)) cmd = &XA_DEMO; + else if (!strncmp (s, "-preferences",L)) cmd = &XA_PREFS; + else if (!strncmp (s, "-prefs",L)) cmd = &XA_PREFS; + else if (!strncmp (s, "-lock", L)) cmd = &XA_LOCK; + else if (!strncmp (s, "-throttle", L)) cmd = &XA_THROTTLE; + else if (!strncmp (s, "-unthrottle", L)) cmd = &XA_UNTHROTTLE; + else if (!strncmp (s, "-version", L)) cmd = &XA_SCREENSAVER_VERSION; + else if (!strncmp (s, "-time", L)) cmd = &XA_SCREENSAVER_STATUS; + else if (!strncmp (s, "-watch", L)) cmd = &XA_WATCH; + else USAGE (); + + if (cmd == &XA_SELECT || cmd == &XA_DEMO) + { + long a; + char c; + if (i+1 < argc && (1 == sscanf(argv[i+1], " %ld %c", &a, &c))) + { + arg = a; + i++; + } + } + } + + if (!cmd) + USAGE (); + + if (arg < 0) + /* no command may have a negative argument. */ + USAGE(); + else if (arg == 0) + { + /* SELECT must have a non-zero argument. */ + if (cmd == &XA_SELECT) + USAGE(); + } + else /* arg > 0 */ + { + /* no command other than SELECT and DEMO may have a non-zero argument. */ + if (cmd != &XA_DEMO && cmd != &XA_SELECT) + USAGE(); + } + + + + /* For backward compatibility: -demo with no arguments used to send a + "DEMO 0" ClientMessage to the xscreensaver process, which brought up + the built-in demo mode dialog. Now that the demo mode dialog is no + longer built in, we bring it up by just running the "xscreensaver-demo" + program. + + Note that "-DEMO <n>" still sends a ClientMessage. + */ + if (cmd == &XA_PREFS || + (cmd == &XA_DEMO && arg == 0)) + { + char buf [512]; + char *new_argv[] = { "xscreensaver-demo", 0, 0, 0, 0, 0 }; + int ac = 1; + + if (dpyname) + { + new_argv[ac++] = "-display"; + new_argv[ac++] = dpyname; + } + + if (cmd == &XA_PREFS) + new_argv[ac++] = "-prefs"; + + fflush(stdout); + fflush(stderr); + execvp (new_argv[0], new_argv); /* shouldn't return */ + + sprintf (buf, "%s: could not exec %s", progname, new_argv[0]); + perror(buf); + fflush(stdout); + fflush(stderr); + exit (-1); + } + + + + if (!dpyname) dpyname = (char *) getenv ("DISPLAY"); + + if (!dpyname) + { + dpyname = ":0.0"; + fprintf (stderr, + "%s: warning: $DISPLAY is not set: defaulting to \"%s\".\n", + progname, dpyname); + } + + dpy = XOpenDisplay (dpyname); + if (!dpy) + { + fprintf (stderr, "%s: can't open display %s\n", progname, + (dpyname ? dpyname : "(null)")); + exit (1); + } + + XA_VROOT = XInternAtom (dpy, "__SWM_VROOT", False); + XA_SCREENSAVER = XInternAtom (dpy, "SCREENSAVER", False); + XA_SCREENSAVER_ID = XInternAtom (dpy, "_SCREENSAVER_ID", False); + XA_SCREENSAVER_VERSION = XInternAtom (dpy, "_SCREENSAVER_VERSION",False); + XA_SCREENSAVER_STATUS = XInternAtom (dpy, "_SCREENSAVER_STATUS", False); + XA_SCREENSAVER_RESPONSE = XInternAtom (dpy, "_SCREENSAVER_RESPONSE", False); + XA_ACTIVATE = XInternAtom (dpy, "ACTIVATE", False); + XA_DEACTIVATE = XInternAtom (dpy, "DEACTIVATE", False); + XA_RESTART = XInternAtom (dpy, "RESTART", False); + XA_CYCLE = XInternAtom (dpy, "CYCLE", False); + XA_NEXT = XInternAtom (dpy, "NEXT", False); + XA_PREV = XInternAtom (dpy, "PREV", False); + XA_SELECT = XInternAtom (dpy, "SELECT", False); + XA_EXIT = XInternAtom (dpy, "EXIT", False); + XA_DEMO = XInternAtom (dpy, "DEMO", False); + XA_PREFS = XInternAtom (dpy, "PREFS", False); + XA_LOCK = XInternAtom (dpy, "LOCK", False); + XA_BLANK = XInternAtom (dpy, "BLANK", False); + XA_THROTTLE = XInternAtom (dpy, "THROTTLE", False); + XA_UNTHROTTLE = XInternAtom (dpy, "UNTHROTTLE", False); + + XSync (dpy, 0); + + if (cmd == &XA_WATCH) + { + i = watch (dpy); + exit (i); + } + + if (*cmd == XA_ACTIVATE || *cmd == XA_LOCK || + *cmd == XA_NEXT || *cmd == XA_PREV || *cmd == XA_SELECT) + /* People never guess that KeyRelease deactivates the screen saver too, + so if we're issuing an activation command, wait a second. + No need to do this if stdin is not a tty, meaning we're not being + run from the command line. + */ + if (isatty(0)) + sleep (1); + + i = xscreensaver_command (dpy, *cmd, arg, True, NULL); + if (i < 0) exit (i); + else exit (0); +} + + +static int +watch (Display *dpy) +{ + char *v = 0; + Window window = RootWindow (dpy, 0); + XWindowAttributes xgwa; + XEvent event; + PROP32 *last = 0; + + if (v) free (v); + XGetWindowAttributes (dpy, window, &xgwa); + XSelectInput (dpy, window, xgwa.your_event_mask | PropertyChangeMask); + + while (1) + { + XNextEvent (dpy, &event); + if (event.xany.type == PropertyNotify && + event.xproperty.state == PropertyNewValue && + event.xproperty.atom == XA_SCREENSAVER_STATUS) + { + Atom type; + int format; + unsigned long nitems, bytesafter; + unsigned char *dataP = 0; + + if (XGetWindowProperty (dpy, + RootWindow (dpy, 0), /* always screen #0 */ + XA_SCREENSAVER_STATUS, + 0, 999, False, XA_INTEGER, + &type, &format, &nitems, &bytesafter, + &dataP) + == Success + && type + && dataP) + { + time_t tt; + char *s; + Bool changed = False; + Bool running = False; + PROP32 *data = (PROP32 *) dataP; + + if (type != XA_INTEGER || nitems < 3) + { + STATUS_LOSE: + if (last) XFree (last); + if (data) XFree (data); + fprintf (stderr, "%s: bad status format on root window.\n", + progname); + return -1; + } + + tt = (time_t) data[1]; + if (tt <= (time_t) 666000000L) /* early 1991 */ + goto STATUS_LOSE; + + s = ctime(&tt); + if (s[strlen(s)-1] == '\n') + s[strlen(s)-1] = 0; + + if (!last || data[0] != last[0]) + { + /* State changed. */ + if (data[0] == XA_BLANK) + printf ("BLANK %s\n", s); + else if (data[0] == XA_LOCK) + printf ("LOCK %s\n", s); + else if (data[0] == 0) + printf ("UNBLANK %s\n", s); + else + goto STATUS_LOSE; + } + + if (!last) + changed = True; + else + { + int i; + for (i = 2; i < nitems; i++) + { + if (data[i] != last[i]) + changed = True; + if (data[i]) + running = True; + } + } + + if (running && changed) + { + int i; + fprintf (stdout, "RUN"); + for (i = 2; i < nitems; i++) + fprintf (stdout, " %d", (int) data[i]); + fprintf (stdout, "\n"); + } + + fflush (stdout); + + if (last) XFree (last); + last = data; + } + else + { + if (last) XFree (last); + if (dataP) XFree (dataP); + fprintf (stderr, "%s: no saver status on root window.\n", + progname); + return -1; + } + } + } +} |