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xss
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Add xkeygrab program

This commit is contained in:
Neale Pickett 2008-04-15 17:18:35 -06:00
parent 48249418df
commit 09f76a5fee
7 changed files with 155 additions and 21 deletions
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2
Makefile
View File

@ -1,7 +1,7 @@
CFLAGS = -Wall
LDLIBS = -lX11
all: xss xsswin xcursorpos magic
all: xss xsswin xcursorpos xkeygrab magic
xss: LDLIBS += -lXss

31
README
View File

@ -5,16 +5,17 @@ program when the X server turns on the built-in screen saver.
`xsswin` makes a full-screen black window and runs some other program,
passing along the window ID in the environment ($XSS_WINDOW) and
possibly as an argument (XSS_WINDOW gets replaced with the id). It does
not grab keyboard or mouse focus: you'll have to run something else
(like `xtrlock`) to do this or other windows will continue to get
keyboard and mouse events.
possibly as an argument (XSS_WINDOW gets replaced with the id).
`xkeygrab` grabs the keyboard and mouse, and echoes all typed lines to
stdout.
`xcursorpos` prints out the x and y coordinates of the cursor.
`magic` is a reimplementation of the "magic" screen saver from After
Dark.
Examples
--------
@ -28,27 +29,37 @@ Run like `xautolock`:
xss xlock -mode qix &
Shell script to run `magic` and `xtrlock` at the same time, but prevent
locking if the cursor is in the upper-left corner:
Shell script to run `magic` while waiting for a pass word from the keybord. Won't
do anything if the cursor is in the upper-left corner:
#! /bin/sh
xcursorpos | (read x y; [ $x -lt 20 -a $y -lt 20 ]) && exit 0
xsswin magic XSS_WINDOW &
pid=$!
xtrlock
xkeygrab | (while [ "$l" != "secret" ]; do read l; done)
kill $pid
Download
--------
You can download a [tarball of the latest
commit](http://woozle.org/~neale/repos/?p=xss;a=snapshot) or use git:
git clone http://woozle.org/~neale/repos/xss/
History
-------
AIX apparently had something also called `xss` which did almost exactly
what mine does, but with command-line options.
I'm not aware of anything else like `xsswin` or `xcursorpos`. If there
is already something out there to do these jobs please let me know so I
can quit using my versions.
`magic` is similar to the `qix` hack from xscreensaver and xlock.
I'm not aware of anything else like the rest of the programs, which is
why I wrote them.
I lifted some code from `beforelight` from the X11 distribution, and
from `slock` from [suckless.org](http://suckless.org/). Both have a

4
magic.c
View File

@ -74,7 +74,7 @@ main(int argc, char * const argv[])
}
}
if ((Window)-1 == w) {
fprintf(stderr, "Usage: %s [WINDOW_ID]\n", argv[0]);
(void)fprintf(stderr, "Usage: %s [WINDOW_ID]\n", argv[0]);
return 64; /* EX_USAGE */
}
@ -188,7 +188,7 @@ main(int argc, char * const argv[])
}
except {
fprintf(stderr, "Error: %s\n", exception);
(void)fprintf(stderr, "Error: %s\n", exception);
return 69; /* EX_UNAVAILABLE */
}
return 0;

6
xcursorpos.c
View File

@ -25,7 +25,7 @@ main(int argc, char *argv[])
Display *display = NULL;
if (argc != 1) {
fprintf(stderr, "Usage: %s\n", argv[0]);
(void)fprintf(stderr, "Usage: %s\n", argv[0]);
return 64; /* EX_USAGE */
}
@ -39,7 +39,7 @@ main(int argc, char *argv[])
if (! XQueryPointer(display, root, &root, &win, &x, &y, &win_x, &win_y, &mask)) {
raise("unable to query pointer");
}
printf("%d %d\n", x, y);
(void)printf("%d %d\n", x, y);
} while (0);
if (display) {
@ -47,7 +47,7 @@ main(int argc, char *argv[])
}
except {
fprintf(stderr, "Error: %s\n", exception);
(void)fprintf(stderr, "Error: %s\n", exception);
return 69; /* EX_UNAVAILABLE */
}

123
xkeygrab.c Normal file
View File

@ -0,0 +1,123 @@
/* xkeygrab -- grab keyboard and mouse, writing typed lines to stdout
* Copyright (C) 2008 Neale Pickett <neale@woozle.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <unistd.h>
#include <ctype.h>
#include <poll.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/keysym.h>
#include "obj.h"
int
main(int argc, char *argv[])
{
Display *display = NULL;
if (argc != 1) {
(void)fprintf(stderr, "Usage: %s\n", argv[0]);
return 64; /* EX_USAGE */
}
try {
Window root;
char obuf[4096];
int obuflen = 0;
struct pollfd fds[2];
if (! (display = XOpenDisplay(NULL))) raise("cannot open display");
root = DefaultRootWindow(display);
if (GrabSuccess != XGrabPointer(display, root,
False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
GrabModeAsync, GrabModeAsync,
None, None, CurrentTime)) {
raise("cannot grab pointer");
}
if (GrabSuccess != XGrabKeyboard(display, root,
True,
GrabModeAsync, GrabModeAsync,
CurrentTime)) {
raise("cannot grab keyboard");
}
fds[0].fd = STDOUT_FILENO;
fds[0].events = 0;
fds[1].fd = ConnectionNumber(display);
fds[1].events = POLLIN;
while (1) {
int ret;
ret = poll(fds, 2, -1);
if (fds[0].revents & POLLERR) {
break;
}
if (fds[1].revents & POLLIN) {
XEvent event;
(void)XNextEvent(display, &event);
if (KeyPress == event.type) {
char buf[32];
KeySym ksym;
int i;
if (obuflen == sizeof(obuf)) continue;
i = XLookupString(&event.xkey, buf, sizeof(buf), &ksym, NULL);
switch (ksym) {
case XK_Return:
if (obuflen) {
(void)write(STDOUT_FILENO, obuf, obuflen);
(void)write(STDOUT_FILENO, "\n", 1);
obuflen = 0;
}
break;
case XK_BackSpace:
if (obuflen) obuflen -= 1;
break;
default:
if (1 == i) {
switch (buf[0]) {
case '\025':
obuflen = 0;
break;
case ' ' ... '~':
obuf[obuflen++] = buf[0];
break;
}
}
break;
}
}
}
}
} while (0);
if (display) {
(void)XUngrabKeyboard(display, CurrentTime);
(void)XUngrabPointer(display, CurrentTime);
(void)XCloseDisplay(display);
}
except {
(void)fprintf(stderr, "Error: %s\n", exception);
return 69; /* EX_UNAVAILABLE */
}
return 0;
}

6
xss.c
View File

@ -40,7 +40,7 @@ main(int argc, char *argv[])
Display *display = NULL;
if (argc < 2) {
fprintf(stderr, "Usage: %s PROGRAM [ARGUMENT ...]\n", argv[0]);
(void)fprintf(stderr, "Usage: %s PROGRAM [ARGUMENT ...]\n", argv[0]);
return 64; /* EX_USAGE */
}
signal(SIGCHLD, sigchld);
@ -55,7 +55,7 @@ main(int argc, char *argv[])
}
XScreenSaverSelectInput(display, DefaultRootWindow(display), ScreenSaverNotifyMask);
while (! XNextEvent(display, &event)) {
if (event.type == ss_event) {
if (ss_event == event.type) {
XScreenSaverNotifyEvent *sevent = (XScreenSaverNotifyEvent *)&event;
if (ScreenSaverOn == sevent->state) {
@ -77,7 +77,7 @@ main(int argc, char *argv[])
}
except {
fprintf(stderr, "Error: %s\n", exception);
(void)fprintf(stderr, "Error: %s\n", exception);
return 69; /* EX_UNAVAILABLE */
}

4
xsswin.c
View File

@ -31,7 +31,7 @@ main(int argc, char * const argv[])
Window w;
if (argc < 2) {
fprintf(stderr, "Usage: %s PROGRAM [ARGUMENT ...]\n", argv[0]);
(void)fprintf(stderr, "Usage: %s PROGRAM [ARGUMENT ...]\n", argv[0]);
return 64; /* EX_USAGE */
}
@ -97,7 +97,7 @@ main(int argc, char * const argv[])
}
except {
fprintf(stderr, "Error: %s\n", exception);
(void)fprintf(stderr, "Error: %s\n", exception);
return 69; /* EX_UNAVAILABLE */
}
return 0;