#include <unistd.h>
#include <sys/types.h>
#include <X11/extensions/Xrandr.h>
+#include <X11/extensions/Xinerama.h>
#include <X11/keysym.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
char *argv0;
+/* global count to prevent repeated error messages */
+int count_error = 0;
+
enum {
INIT,
INPUT,
NUMCOLS
};
-#include "config.h"
-
struct lock {
int screen;
Window root, win;
int errbase;
};
+#include "config.h"
+
static void
die(const char *errstr, ...)
{
if (fclose(f)) {
if (errno == EACCES)
die("slock: unable to disable OOM killer. "
- "suid or sgid set?\n");
+ "Make sure to suid or sgid slock.\n");
else
- die("slock: fclose %s: %s\n", oomfile,
- strerror(errno));
+ die("slock: fclose %s: %s\n", oomfile, strerror(errno));
}
}
#endif
+static void
+writemessage(Display *dpy, Window win, int screen)
+{
+ int len, line_len, width, height, s_width, s_height, i, j, k, tab_replace, tab_size;
+ XGCValues gr_values;
+ XFontStruct *fontinfo;
+ XColor color, dummy;
+ XineramaScreenInfo *xsi;
+ GC gc;
+ fontinfo = XLoadQueryFont(dpy, font_name);
+
+ if (fontinfo == NULL) {
+ if (count_error == 0) {
+ fprintf(stderr, "slock: Unable to load font \"%s\"\n", font_name);
+ fprintf(stderr, "slock: Try listing fonts with 'slock -f'\n");
+ count_error++;
+ }
+ return;
+ }
+
+ tab_size = 8 * XTextWidth(fontinfo, " ", 1);
+
+ XAllocNamedColor(dpy, DefaultColormap(dpy, screen),
+ text_color, &color, &dummy);
+
+ gr_values.font = fontinfo->fid;
+ gr_values.foreground = color.pixel;
+ gc=XCreateGC(dpy,win,GCFont+GCForeground, &gr_values);
+
+ /* To prevent "Uninitialized" warnings. */
+ xsi = NULL;
+
+ /*
+ * Start formatting and drawing text
+ */
+
+ len = strlen(message);
+
+ /* Max max line length (cut at '\n') */
+ line_len = 0;
+ k = 0;
+ for (i = j = 0; i < len; i++) {
+ if (message[i] == '\n') {
+ if (i - j > line_len)
+ line_len = i - j;
+ k++;
+ i++;
+ j = i;
+ }
+ }
+ /* If there is only one line */
+ if (line_len == 0)
+ line_len = len;
+
+ if (XineramaIsActive(dpy)) {
+ xsi = XineramaQueryScreens(dpy, &i);
+ s_width = xsi[0].width;
+ s_height = xsi[0].height;
+ } else {
+ s_width = DisplayWidth(dpy, screen);
+ s_height = DisplayHeight(dpy, screen);
+ }
+
+ height = s_height*3/7 - (k*20)/3;
+ width = (s_width - XTextWidth(fontinfo, message, line_len))/2;
+
+ /* Look for '\n' and print the text between them. */
+ for (i = j = k = 0; i <= len; i++) {
+ /* i == len is the special case for the last line */
+ if (i == len || message[i] == '\n') {
+ tab_replace = 0;
+ while (message[j] == '\t' && j < i) {
+ tab_replace++;
+ j++;
+ }
+
+ XDrawString(dpy, win, gc, width + tab_size*tab_replace, height + 20*k, message + j, i - j);
+ while (i < len && message[i] == '\n') {
+ i++;
+ j = i;
+ k++;
+ }
+ }
+ }
+
+ /* xsi should not be NULL anyway if Xinerama is active, but to be safe */
+ if (XineramaIsActive(dpy) && xsi != NULL)
+ XFree(xsi);
+}
+
+
+
static const char *
gethash(void)
{
hash = pw->pw_passwd;
#if HAVE_SHADOW_H
- if (hash[0] == 'x' && hash[1] == '\0') {
+ if (!strcmp(hash, "x")) {
struct spwd *sp;
- if (!(sp = getspnam(getenv("USER"))))
- die("slock: getspnam: cannot retrieve shadow entry (make sure to suid or sgid slock)\n");
+ if (!(sp = getspnam(pw->pw_name)))
+ die("slock: getspnam: cannot retrieve shadow entry. "
+ "Make sure to suid or sgid slock.\n");
hash = sp->sp_pwdp;
}
#else
- if (hash[0] == '*' && hash[1] == '\0') {
+ if (!strcmp(hash, "*")) {
#ifdef __OpenBSD__
- if (!(pw = getpwnam_shadow(getenv("USER"))))
- die("slock: getpwnam_shadow: cannot retrieve shadow entry (make sure to suid or sgid slock)\n");
+ if (!(pw = getpwuid_shadow(getuid())))
+ die("slock: getpwnam_shadow: cannot retrieve shadow entry. "
+ "Make sure to suid or sgid slock.\n");
hash = pw->pw_passwd;
#else
- die("slock: getpwuid: cannot retrieve shadow entry (make sure to suid or sgid slock)\n");
+ die("slock: getpwuid: cannot retrieve shadow entry. "
+ "Make sure to suid or sgid slock.\n");
#endif /* __OpenBSD__ */
}
#endif /* HAVE_SHADOW_H */
readpw(Display *dpy, struct xrandr *rr, struct lock **locks, int nscreens,
const char *hash)
{
+ XRRScreenChangeNotifyEvent *rre;
char buf[32], passwd[256], *inputhash;
- int num, screen, running, failure;
+ int num, screen, running, failure, oldc;
unsigned int len, color;
KeySym ksym;
XEvent ev;
- static int oldc = INIT;
len = 0;
running = 1;
failure = 0;
+ oldc = INIT;
- /* As "slock" stands for "Simple X display locker", the DPMS settings
- * had been removed and you can set it with "xset" or some other
- * utility. This way the user can easily set a customized DPMS
- * timeout. */
while (running && !XNextEvent(dpy, &ev)) {
if (ev.type == KeyPress) {
explicit_bzero(&buf, sizeof(buf));
continue;
switch (ksym) {
case XK_Return:
- passwd[len] = 0;
+ passwd[len] = '\0';
errno = 0;
if (!(inputhash = crypt(passwd, hash)))
fprintf(stderr, "slock: crypt: %s\n", strerror(errno));
running = !!strcmp(inputhash, hash);
if (running) {
XBell(dpy, 100);
- failure = True;
+ failure = 1;
}
explicit_bzero(&passwd, sizeof(passwd));
len = 0;
break;
case XK_BackSpace:
if (len)
- passwd[len--] = 0;
+ passwd[--len] = '\0';
break;
default:
- if (num && !iscntrl((int)buf[0]) && (len + num < sizeof(passwd))) {
+ if (num && !iscntrl((int)buf[0]) &&
+ (len + num < sizeof(passwd))) {
memcpy(passwd + len, buf, num);
len += num;
}
break;
}
- color = len ? INPUT : (failure || failonclear ? FAILED : INIT);
+ color = len ? INPUT : ((failure || failonclear) ? FAILED : INIT);
if (running && oldc != color) {
for (screen = 0; screen < nscreens; screen++) {
- XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[color]);
+ XSetWindowBackground(dpy,
+ locks[screen]->win,
+ locks[screen]->colors[color]);
XClearWindow(dpy, locks[screen]->win);
+ writemessage(dpy, locks[screen]->win, screen);
}
oldc = color;
}
} else if (rr->active && ev.type == rr->evbase + RRScreenChangeNotify) {
- XRRScreenChangeNotifyEvent *rre = (XRRScreenChangeNotifyEvent*)&ev;
+ rre = (XRRScreenChangeNotifyEvent*)&ev;
for (screen = 0; screen < nscreens; screen++) {
if (locks[screen]->win == rre->window) {
- XResizeWindow(dpy, locks[screen]->win, rre->width, rre->height);
+ if (rre->rotation == RR_Rotate_90 ||
+ rre->rotation == RR_Rotate_270)
+ XResizeWindow(dpy, locks[screen]->win,
+ rre->height, rre->width);
+ else
+ XResizeWindow(dpy, locks[screen]->win,
+ rre->width, rre->height);
XClearWindow(dpy, locks[screen]->win);
+ break;
}
}
- } else for (screen = 0; screen < nscreens; screen++)
- XRaiseWindow(dpy, locks[screen]->win);
+ } else {
+ for (screen = 0; screen < nscreens; screen++)
+ XRaiseWindow(dpy, locks[screen]->win);
+ }
}
}
lock->root = RootWindow(dpy, lock->screen);
for (i = 0; i < NUMCOLS; i++) {
- XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), colorname[i], &color, &dummy);
+ XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen),
+ colorname[i], &color, &dummy);
lock->colors[i] = color.pixel;
}
/* init */
wa.override_redirect = 1;
wa.background_pixel = lock->colors[INIT];
- lock->win = XCreateWindow(dpy, lock->root, 0, 0, DisplayWidth(dpy, lock->screen), DisplayHeight(dpy, lock->screen),
- 0, DefaultDepth(dpy, lock->screen), CopyFromParent,
- DefaultVisual(dpy, lock->screen), CWOverrideRedirect | CWBackPixel, &wa);
+ lock->win = XCreateWindow(dpy, lock->root, 0, 0,
+ DisplayWidth(dpy, lock->screen),
+ DisplayHeight(dpy, lock->screen),
+ 0, DefaultDepth(dpy, lock->screen),
+ CopyFromParent,
+ DefaultVisual(dpy, lock->screen),
+ CWOverrideRedirect | CWBackPixel, &wa);
lock->pmap = XCreateBitmapFromData(dpy, lock->win, curs, 8, 8);
- invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap, &color, &color, 0, 0);
+ invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap,
+ &color, &color, 0, 0);
XDefineCursor(dpy, lock->win, invisible);
/* Try to grab mouse pointer *and* keyboard for 600ms, else fail the lock */
for (i = 0, ptgrab = kbgrab = -1; i < 6; i++) {
if (ptgrab != GrabSuccess) {
ptgrab = XGrabPointer(dpy, lock->root, False,
- ButtonPressMask | ButtonReleaseMask |
- PointerMotionMask, GrabModeAsync,
- GrabModeAsync, None, invisible, CurrentTime);
+ ButtonPressMask | ButtonReleaseMask |
+ PointerMotionMask, GrabModeAsync,
+ GrabModeAsync, None, invisible, CurrentTime);
}
if (kbgrab != GrabSuccess) {
kbgrab = XGrabKeyboard(dpy, lock->root, True,
- GrabModeAsync, GrabModeAsync, CurrentTime);
+ GrabModeAsync, GrabModeAsync, CurrentTime);
}
/* input is grabbed: we can lock the screen */
/* we couldn't grab all input: fail out */
if (ptgrab != GrabSuccess)
- fprintf(stderr, "slock: unable to grab mouse pointer for screen %d\n", screen);
+ fprintf(stderr, "slock: unable to grab mouse pointer for screen %d\n",
+ screen);
if (kbgrab != GrabSuccess)
- fprintf(stderr, "slock: unable to grab keyboard for screen %d\n", screen);
+ fprintf(stderr, "slock: unable to grab keyboard for screen %d\n",
+ screen);
return NULL;
}
static void
usage(void)
{
- die("usage: slock [-v] [cmd [arg ...]]\n");
+ die("usage: slock [-v] [-f] [-m message] [cmd [arg ...]]\n");
}
int
gid_t dgid;
const char *hash;
Display *dpy;
- int s, nlocks, nscreens;
+ int i, s, nlocks, nscreens;
+ int count_fonts;
+ char **font_names;
ARGBEGIN {
case 'v':
fprintf(stderr, "slock-"VERSION"\n");
return 0;
+ case 'm':
+ message = EARGF(usage());
+ break;
+ case 'f':
+ if (!(dpy = XOpenDisplay(NULL)))
+ die("slock: cannot open display\n");
+ font_names = XListFonts(dpy, "*", 10000 /* list 10000 fonts*/, &count_fonts);
+ for (i=0; i<count_fonts; i++) {
+ fprintf(stderr, "%s\n", *(font_names+i));
+ }
+ return 0;
default:
usage();
} ARGEND
/* validate drop-user and -group */
errno = 0;
if (!(pwd = getpwnam(user)))
- die("slock: getpwnam %s: %s\n", user, errno ?
- strerror(errno) : "user entry not found");
+ die("slock: getpwnam %s: %s\n", user,
+ errno ? strerror(errno) : "user entry not found");
duid = pwd->pw_uid;
errno = 0;
if (!(grp = getgrnam(group)))
- die("slock: getgrnam %s: %s\n", group, errno ?
- strerror(errno) : "group entry not found");
+ die("slock: getgrnam %s: %s\n", group,
+ errno ? strerror(errno) : "group entry not found");
dgid = grp->gr_gid;
#ifdef __linux__
#endif
hash = gethash();
- if (strlen(hash) < 2)
- die("slock: failed to get user password hash.\n");
+ errno = 0;
+ if (!crypt("", hash))
+ die("slock: crypt: %s\n", strerror(errno));
if (!(dpy = XOpenDisplay(NULL)))
die("slock: cannot open display\n");
if (!(locks = calloc(nscreens, sizeof(struct lock *))))
die("slock: out of memory\n");
for (nlocks = 0, s = 0; s < nscreens; s++) {
- if ((locks[s] = lockscreen(dpy, &rr, s)) != NULL)
+ if ((locks[s] = lockscreen(dpy, &rr, s)) != NULL) {
+ writemessage(dpy, locks[s]->win, s);
nlocks++;
- else
+ } else {
break;
+ }
}
XSync(dpy, 0);
if (close(ConnectionNumber(dpy)) < 0)
die("slock: close: %s\n", strerror(errno));
execvp(argv[0], argv);
- fprintf(stderr, "slock: execvp %s: %s\n", argv[0],
- strerror(errno));
+ fprintf(stderr, "slock: execvp %s: %s\n", argv[0], strerror(errno));
_exit(1);
}
}
