mirror of https://github.com/i3/i3lock.git
334 lines
11 KiB
C
334 lines
11 KiB
C
/*
|
||
* vim:ts=8:expandtab
|
||
*
|
||
* i3lock - an improved version of slock
|
||
*
|
||
* i3lock © 2009 Michael Stapelberg and contributors
|
||
* slock © 2006-2008 Anselm R Garbe
|
||
*
|
||
* See file LICENSE for license information.
|
||
*
|
||
* Note that on any error (calloc is out of memory for example)
|
||
* we do not do anything so that the user can fix the error by
|
||
* himself (kill X to get more free memory or stop some other
|
||
* program using SSH/console).
|
||
*
|
||
*/
|
||
#define _XOPEN_SOURCE 500
|
||
|
||
#include <ctype.h>
|
||
#include <stdarg.h>
|
||
#include <stdlib.h>
|
||
#include <stdio.h>
|
||
#include <stdint.h>
|
||
#include <string.h>
|
||
#include <unistd.h>
|
||
#include <sys/types.h>
|
||
#include <X11/keysym.h>
|
||
#include <X11/Xlib.h>
|
||
#include <X11/Xutil.h>
|
||
#include <X11/xpm.h>
|
||
#include <X11/extensions/dpms.h>
|
||
#include <stdbool.h>
|
||
#include <getopt.h>
|
||
|
||
#include <security/pam_appl.h>
|
||
|
||
static char passwd[256];
|
||
|
||
static void die(const char *errstr, ...) {
|
||
va_list ap;
|
||
|
||
va_start(ap, errstr);
|
||
vfprintf(stderr, errstr, ap);
|
||
va_end(ap);
|
||
exit(EXIT_FAILURE);
|
||
}
|
||
|
||
/*
|
||
* Returns the colorpixel to use for the given hex color (think of HTML).
|
||
*
|
||
* The hex_color may not start with #, for example FF00FF works.
|
||
*
|
||
* NOTE that get_colorpixel() does _NOT_ check the given color code for validity.
|
||
* This has to be done by the caller.
|
||
*
|
||
*/
|
||
uint32_t get_colorpixel(char *hex) {
|
||
char strgroups[3][3] = {{hex[0], hex[1], '\0'},
|
||
{hex[2], hex[3], '\0'},
|
||
{hex[4], hex[5], '\0'}};
|
||
uint32_t rgb16[3] = {(strtol(strgroups[0], NULL, 16)),
|
||
(strtol(strgroups[1], NULL, 16)),
|
||
(strtol(strgroups[2], NULL, 16))};
|
||
|
||
return (rgb16[0] << 16) + (rgb16[1] << 8) + rgb16[2];
|
||
}
|
||
|
||
/*
|
||
* Check if given file can be opened => exists
|
||
*
|
||
*/
|
||
bool file_exists(const char *filename)
|
||
{
|
||
FILE * file = fopen(filename, "r");
|
||
if(file)
|
||
{
|
||
fclose(file);
|
||
return true;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
/*
|
||
* Puts the given XPM error code to stderr
|
||
*
|
||
*/
|
||
void print_xpm_error(int err)
|
||
{
|
||
switch (err) {
|
||
case XpmColorError:
|
||
fprintf(stderr, "XPM: Could not parse or alloc requested color\n");
|
||
break;
|
||
case XpmOpenFailed:
|
||
fprintf(stderr, "XPM: Cannot open file\n");
|
||
break;
|
||
case XpmFileInvalid:
|
||
fprintf(stderr, "XPM: invalid XPM file\n");
|
||
break;
|
||
case XpmNoMemory:
|
||
fprintf(stderr, "XPM: Not enough memory\n");
|
||
break;
|
||
case XpmColorFailed:
|
||
fprintf(stderr, "XPM: Color not found\n");
|
||
break;
|
||
}
|
||
}
|
||
|
||
|
||
/*
|
||
* Callback function for PAM. We only react on password request callbacks.
|
||
*
|
||
*/
|
||
static int conv_callback(int num_msg, const struct pam_message **msg,
|
||
struct pam_response **resp, void *appdata_ptr) {
|
||
if (num_msg == 0)
|
||
return 1;
|
||
|
||
/* PAM expects an arry of responses, one for each message */
|
||
if ((*resp = calloc(num_msg, sizeof(struct pam_message))) == NULL) {
|
||
perror("calloc");
|
||
return 1;
|
||
}
|
||
|
||
for (int c = 0; c < num_msg; c++) {
|
||
if (msg[c]->msg_style != PAM_PROMPT_ECHO_OFF &&
|
||
msg[c]->msg_style != PAM_PROMPT_ECHO_ON)
|
||
continue;
|
||
|
||
/* return code is currently not used but should be set to zero */
|
||
resp[c]->resp_retcode = 0;
|
||
if ((resp[c]->resp = strdup(passwd)) == NULL) {
|
||
perror("strdup");
|
||
return 1;
|
||
}
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
int main(int argc, char *argv[]) {
|
||
char curs[] = {0, 0, 0, 0, 0, 0, 0, 0};
|
||
char buf[32];
|
||
char *username;
|
||
int num, screen;
|
||
|
||
unsigned int len;
|
||
bool running = true;
|
||
|
||
/* By default, fork, don’t beep and don’t turn off monitor */
|
||
bool dont_fork = false;
|
||
bool beep = false;
|
||
bool dpms = false;
|
||
bool xpm_image = false;
|
||
char xpm_image_path[256];
|
||
char color[7] = "ffffff"; // white
|
||
Cursor invisible;
|
||
Display *dpy;
|
||
KeySym ksym;
|
||
Pixmap pmap;
|
||
Window root, w;
|
||
XColor black, dummy;
|
||
XEvent ev;
|
||
XSetWindowAttributes wa;
|
||
|
||
pam_handle_t *handle;
|
||
struct pam_conv conv = {conv_callback, NULL};
|
||
|
||
char opt;
|
||
int optind = 0;
|
||
static struct option long_options[] = {
|
||
{"version", no_argument, NULL, 'v'},
|
||
{"nofork", no_argument, NULL, 'n'},
|
||
{"beep", no_argument, NULL, 'b'},
|
||
{"dpms", no_argument, NULL, 'd'},
|
||
{"image", required_argument, NULL, 'i'},
|
||
{"color", required_argument, NULL, 'c'},
|
||
{NULL, no_argument, NULL, 0}
|
||
};
|
||
|
||
while ((opt = getopt_long(argc, argv, "vnbdi:c:", long_options, &optind)) != -1) {
|
||
switch (opt) {
|
||
case 'v':
|
||
die("i3lock-"VERSION", © 2009 Michael Stapelberg\n"
|
||
"based on slock, which is © 2006-2008 Anselm R Garbe\n");
|
||
case 'n':
|
||
dont_fork = true;
|
||
break;
|
||
case 'b':
|
||
beep = true;
|
||
break;
|
||
case 'd':
|
||
dpms = true;
|
||
break;
|
||
case 'i':
|
||
strncpy(xpm_image_path, optarg, 255);
|
||
xpm_image = true;
|
||
break;
|
||
case 'c':
|
||
{
|
||
char *arg = optarg;
|
||
/* Skip # if present */
|
||
if (arg[0] == '#')
|
||
arg++;
|
||
|
||
if (strlen(arg) != 6 || sscanf(arg, "%06[0-9a-fA-F]", color) != 1)
|
||
die("color is invalid, color must be given in 6-byte format: rrggbb\n");
|
||
|
||
break;
|
||
}
|
||
default:
|
||
die("i3lock: Unknown option. Syntax: i3lock [-v] [-n] [-b] [-d] [-i image.xpm] [-c color]\n");
|
||
}
|
||
}
|
||
|
||
if ((username = getenv("USER")) == NULL)
|
||
die("USER environment variable not set, please set it.\n");
|
||
|
||
int ret = pam_start("i3lock", username, &conv, &handle);
|
||
if (ret != PAM_SUCCESS)
|
||
die("PAM: %s\n", pam_strerror(handle, ret));
|
||
|
||
if(!(dpy = XOpenDisplay(0)))
|
||
die("i3lock: cannot open display\n");
|
||
screen = DefaultScreen(dpy);
|
||
root = RootWindow(dpy, screen);
|
||
|
||
if (!dont_fork) {
|
||
if (fork() != 0)
|
||
return 0;
|
||
}
|
||
|
||
/* init */
|
||
wa.override_redirect = 1;
|
||
wa.background_pixel = get_colorpixel(color);
|
||
w = XCreateWindow(dpy, root, 0, 0, DisplayWidth(dpy, screen), DisplayHeight(dpy, screen),
|
||
0, DefaultDepth(dpy, screen), CopyFromParent,
|
||
DefaultVisual(dpy, screen), CWOverrideRedirect | CWBackPixel, &wa);
|
||
XAllocNamedColor(dpy, DefaultColormap(dpy, screen), "black", &black, &dummy);
|
||
pmap = XCreateBitmapFromData(dpy, w, curs, 8, 8);
|
||
invisible = XCreatePixmapCursor(dpy, pmap, pmap, &black, &black, 0, 0);
|
||
XDefineCursor(dpy, w, invisible);
|
||
XMapRaised(dpy, w);
|
||
|
||
if(xpm_image && file_exists(xpm_image_path))
|
||
{
|
||
GC gc = XDefaultGC(dpy, 0);
|
||
int depth = DefaultDepth(dpy, screen);
|
||
int disp_width = DisplayWidth(dpy, screen);
|
||
int disp_height = DisplayHeight(dpy, screen);
|
||
Pixmap pix = XCreatePixmap(dpy, w, disp_width, disp_height, depth);
|
||
int err = XpmReadFileToPixmap(dpy, w, xpm_image_path, &pix, 0, 0);
|
||
if (err != 0) {
|
||
print_xpm_error(err);
|
||
return 1;
|
||
}
|
||
XCopyArea(dpy, pix, w, gc, 0, 0, disp_width, disp_height, 0, 0);
|
||
}
|
||
|
||
for(len = 1000; len; len--) {
|
||
if(XGrabPointer(dpy, root, False, ButtonPressMask | ButtonReleaseMask,
|
||
GrabModeAsync, GrabModeAsync, None, invisible, CurrentTime) == GrabSuccess)
|
||
break;
|
||
usleep(1000);
|
||
}
|
||
if((running = running && (len > 0))) {
|
||
for(len = 1000; len; len--) {
|
||
if(XGrabKeyboard(dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
|
||
== GrabSuccess)
|
||
break;
|
||
usleep(1000);
|
||
}
|
||
running = (len > 0);
|
||
}
|
||
len = 0;
|
||
XSync(dpy, False);
|
||
|
||
/* main event loop */
|
||
while(running && !XNextEvent(dpy, &ev)) {
|
||
if (len == 0 && dpms && DPMSCapable(dpy)) {
|
||
DPMSEnable(dpy);
|
||
DPMSForceLevel(dpy, DPMSModeOff);
|
||
}
|
||
|
||
if(ev.type != KeyPress)
|
||
continue;
|
||
|
||
buf[0] = 0;
|
||
num = XLookupString(&ev.xkey, buf, sizeof buf, &ksym, 0);
|
||
if(IsKeypadKey(ksym)) {
|
||
if(ksym == XK_KP_Enter)
|
||
ksym = XK_Return;
|
||
else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
|
||
ksym = (ksym - XK_KP_0) + XK_0;
|
||
}
|
||
if(IsFunctionKey(ksym) ||
|
||
IsKeypadKey(ksym) ||
|
||
IsMiscFunctionKey(ksym) ||
|
||
IsPFKey(ksym) ||
|
||
IsPrivateKeypadKey(ksym))
|
||
continue;
|
||
switch(ksym) {
|
||
case XK_Return:
|
||
passwd[len] = 0;
|
||
if ((ret = pam_authenticate(handle, 0)) == PAM_SUCCESS)
|
||
running = false;
|
||
else {
|
||
fprintf(stderr, "PAM: %s\n", pam_strerror(handle, ret));
|
||
if (beep)
|
||
XBell(dpy, 100);
|
||
}
|
||
len = 0;
|
||
break;
|
||
case XK_Escape:
|
||
len = 0;
|
||
break;
|
||
case XK_BackSpace:
|
||
if (len > 0)
|
||
len--;
|
||
break;
|
||
default:
|
||
if(num && !iscntrl((int) buf[0]) && (len + num < sizeof passwd)) {
|
||
memcpy(passwd + len, buf, num);
|
||
len += num;
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
XUngrabPointer(dpy, CurrentTime);
|
||
XFreePixmap(dpy, pmap);
|
||
XDestroyWindow(dpy, w);
|
||
XCloseDisplay(dpy);
|
||
return 0;
|
||
}
|