X-Git-Url: https://git.xinqibao.xyz/slock.git/blobdiff_plain/9698224090ff2989659717815bfa076d5d436a70..HEAD:/slock.c
diff --git a/slock.c b/slock.c
index 62a9841..b8b7fe4 100644
--- a/slock.c
+++ b/slock.c
@@ -6,6 +6,7 @@
#include <ctype.h>
#include <errno.h>
+#include <grp.h>
#include <pwd.h>
#include <stdarg.h>
#include <stdlib.h>
@@ -14,20 +15,19 @@
#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>
-#if HAVE_BSD_AUTH
-#include <login_cap.h>
-#include <bsd_auth.h>
-#endif
-
#include "arg.h"
#include "util.h"
char *argv0;
+/* global count to prevent repeated error messages */
+int count_error = 0;
+
enum {
INIT,
INPUT,
@@ -35,20 +35,20 @@ enum {
NUMCOLS
};
-#include "config.h"
-
-typedef struct {
+struct lock {
int screen;
Window root, win;
Pixmap pmap;
unsigned long colors[NUMCOLS];
-} Lock;
+};
-static Lock **locks;
-static int nscreens;
-static Bool rr;
-static int rrevbase;
-static int rrerrbase;
+struct xrandr {
+ int active;
+ int evbase;
+ int errbase;
+};
+
+#include "config.h"
static void
die(const char *errstr, ...)
@@ -80,22 +80,146 @@ dontkillme(void)
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
-#ifndef HAVE_BSD_AUTH
-/* only run as root */
+static int
+readescapedint(const char *str, int *i) {
+ int n = 0;
+ if (str[*i])
+ ++*i;
+ while(str[*i] && str[*i] != ';' && str[*i] != 'm') {
+ n = 10 * n + str[*i] - '0';
+ ++*i;
+ }
+ return n;
+}
+
+static void
+writemessage(Display *dpy, Window win, int screen)
+{
+ int len, line_len, width, height, s_width, s_height, i, k, tab_size, r, g, b, escaped_int, curr_line_len;
+ 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 = curr_line_len = 0;
+ k = 0;
+ for (i = 0; i < len; i++) {
+ if (message[i] == '\n') {
+ curr_line_len = 0;
+ k++;
+ } else if (message[i] == 0x1b) {
+ while (i < len && message[i] != 'm') {
+ i++;
+ }
+ if (i == len)
+ die("slock: unclosed escape sequence\n");
+ } else {
+ curr_line_len += XTextWidth(fontinfo, message + i, 1);
+ if (curr_line_len > line_len)
+ line_len = curr_line_len;
+ }
+ }
+ /* 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 - line_len)/2;
+
+ line_len = 0;
+ /* print the text while parsing 24 bit color ANSI escape codes*/
+ for (i = k = 0; i < len; i++) {
+ switch (message[i]) {
+ case '\n':
+ line_len = 0;
+ while (message[i + 1] == '\t') {
+ line_len += tab_size;
+ i++;
+ }
+ k++;
+ break;
+ case 0x1b:
+ i++;
+ if (message[i] == '[') {
+ escaped_int = readescapedint(message, &i);
+ if (escaped_int == 39)
+ continue;
+ if (escaped_int != 38)
+ die("slock: unknown escape sequence%d\n", escaped_int);
+ if (readescapedint(message, &i) != 2)
+ die("slock: only 24 bit color supported\n");
+ r = readescapedint(message, &i) & 0xff;
+ g = readescapedint(message, &i) & 0xff;
+ b = readescapedint(message, &i) & 0xff;
+ XSetForeground(dpy, gc, r << 16 | g << 8 | b);
+ } else
+ die("slock: unknown escape sequence\n");
+ break;
+ default:
+ XDrawString(dpy, win, gc, width + line_len, height + 20 * k, message + i, 1);
+ line_len += XTextWidth(fontinfo, message + i, 1);
+ }
+ }
+
+ /* xsi should not be NULL anyway if Xinerama is active, but to be safe */
+ if (XineramaIsActive(dpy) && xsi != NULL)
+ XFree(xsi);
+}
+
+
+
static const char *
-getpw(void)
+gethash(void)
{
- const char *rval;
+ const char *hash;
struct passwd *pw;
+ /* Check if the current user has a password entry */
errno = 0;
if (!(pw = getpwuid(getuid()))) {
if (errno)
@@ -103,47 +227,49 @@ getpw(void)
else
die("slock: cannot retrieve password entry\n");
}
- rval = pw->pw_passwd;
+ hash = pw->pw_passwd;
#if HAVE_SHADOW_H
- if (rval[0] == 'x' && rval[1] == '\0') {
+ if (!strcmp(hash, "x")) {
struct spwd *sp;
- if (!(sp = getspnam(getenv("USER"))))
- die("slock: cannot retrieve shadow entry (make sure to suid or sgid slock)\n");
- rval = sp->sp_pwdp;
+ 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;
}
-#endif
+#else
+ if (!strcmp(hash, "*")) {
+#ifdef __OpenBSD__
+ 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");
+#endif /* __OpenBSD__ */
+ }
+#endif /* HAVE_SHADOW_H */
- /* drop privileges */
- if (geteuid() == 0 &&
- ((getegid() != pw->pw_gid && setgid(pw->pw_gid) < 0) || setuid(pw->pw_uid) < 0))
- die("slock: cannot drop privileges\n");
- return rval;
+ return hash;
}
-#endif
static void
-#ifdef HAVE_BSD_AUTH
-readpw(Display *dpy)
-#else
-readpw(Display *dpy, const char *pws)
-#endif
+readpw(Display *dpy, struct xrandr *rr, struct lock **locks, int nscreens,
+ const char *hash)
{
- char buf[32], passwd[256], *encrypted;
- int num, screen, running, failure;
+ XRRScreenChangeNotifyEvent *rre;
+ char buf[32], passwd[256], *inputhash;
+ 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));
@@ -162,19 +288,15 @@ readpw(Display *dpy, const char *pws)
continue;
switch (ksym) {
case XK_Return:
- passwd[len] = 0;
-#ifdef HAVE_BSD_AUTH
- running = !auth_userokay(getlogin(), NULL, "auth-slock", passwd);
-#else
+ passwd[len] = '\0';
errno = 0;
- if (!(encrypted = crypt(passwd, pws)))
+ if (!(inputhash = crypt(passwd, hash)))
fprintf(stderr, "slock: crypt: %s\n", strerror(errno));
else
- running = !!strcmp(encrypted, pws);
-#endif
+ running = !!strcmp(inputhash, hash);
if (running) {
XBell(dpy, 100);
- failure = True;
+ failure = 1;
}
explicit_bzero(&passwd, sizeof(passwd));
len = 0;
@@ -185,111 +307,103 @@ readpw(Display *dpy, const char *pws)
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 && ev.type == rrevbase + RRScreenChangeNotify) {
- XRRScreenChangeNotifyEvent *rre = (XRRScreenChangeNotifyEvent*)&ev;
+ } else if (rr->active && ev.type == rr->evbase + RRScreenChangeNotify) {
+ 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);
+ }
}
}
-static void
-unlockscreen(Display *dpy, Lock *lock)
-{
- if(dpy == NULL || lock == NULL)
- return;
-
- XUngrabPointer(dpy, CurrentTime);
- XUngrabKeyboard(dpy, CurrentTime);
- XFreeColors(dpy, DefaultColormap(dpy, lock->screen), lock->colors, NUMCOLS, 0);
- XFreePixmap(dpy, lock->pmap);
- XDestroyWindow(dpy, lock->win);
-
- free(lock);
-}
-
-static void
-cleanup(Display *dpy)
-{
- int s;
-
- for (s = 0; s < nscreens; ++s)
- unlockscreen(dpy, locks[s]);
-
- free(locks);
- XCloseDisplay(dpy);
-}
-
-static Lock *
-lockscreen(Display *dpy, int screen)
+static struct lock *
+lockscreen(Display *dpy, struct xrandr *rr, int screen)
{
char curs[] = {0, 0, 0, 0, 0, 0, 0, 0};
int i, ptgrab, kbgrab;
- Lock *lock;
+ struct lock *lock;
XColor color, dummy;
XSetWindowAttributes wa;
Cursor invisible;
- if (dpy == NULL || screen < 0 || !(lock = malloc(sizeof(Lock))))
+ if (dpy == NULL || screen < 0 || !(lock = malloc(sizeof(struct lock))))
return NULL;
lock->screen = screen;
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 */
if (ptgrab == GrabSuccess && kbgrab == GrabSuccess) {
XMapRaised(dpy, lock->win);
- if (rr)
+ if (rr->active)
XRRSelectInput(dpy, lock->win, RRScreenChangeNotifyMask);
XSelectInput(dpy, lock->root, SubstructureNotifyMask);
@@ -306,104 +420,122 @@ lockscreen(Display *dpy, int 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
main(int argc, char **argv) {
-#ifndef HAVE_BSD_AUTH
- const char *pws;
-#endif
+ struct xrandr rr;
+ struct lock **locks;
+ struct passwd *pwd;
+ struct group *grp;
+ uid_t duid;
+ gid_t dgid;
+ const char *hash;
Display *dpy;
- int s, nlocks;
+ 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");
+ duid = pwd->pw_uid;
+ errno = 0;
+ if (!(grp = getgrnam(group)))
+ die("slock: getgrnam %s: %s\n", group,
+ errno ? strerror(errno) : "group entry not found");
+ dgid = grp->gr_gid;
+
#ifdef __linux__
dontkillme();
#endif
- /* Check if the current user has a password entry */
+ hash = gethash();
errno = 0;
- if (!getpwuid(getuid())) {
- if (errno == 0)
- die("slock: no password entry for current user\n");
- else
- die("slock: getpwuid: %s\n", strerror(errno));
- }
-
-#ifndef HAVE_BSD_AUTH
- pws = getpw();
- if (strlen(pws) < 2)
- die("slock: failed to get user password hash.\n");
-#endif
+ if (!crypt("", hash))
+ die("slock: crypt: %s\n", strerror(errno));
if (!(dpy = XOpenDisplay(NULL)))
die("slock: cannot open display\n");
+ /* drop privileges */
+ if (setgroups(0, NULL) < 0)
+ die("slock: setgroups: %s\n", strerror(errno));
+ if (setgid(dgid) < 0)
+ die("slock: setgid: %s\n", strerror(errno));
+ if (setuid(duid) < 0)
+ die("slock: setuid: %s\n", strerror(errno));
+
/* check for Xrandr support */
- rr = XRRQueryExtension(dpy, &rrevbase, &rrerrbase);
+ rr.active = XRRQueryExtension(dpy, &rr.evbase, &rr.errbase);
/* get number of screens in display "dpy" and blank them */
nscreens = ScreenCount(dpy);
- if (!(locks = calloc(nscreens, sizeof(Lock *)))) {
- XCloseDisplay(dpy);
+ 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, s)) != NULL)
+ if ((locks[s] = lockscreen(dpy, &rr, s)) != NULL) {
+ writemessage(dpy, locks[s]->win, s);
nlocks++;
- else
+ } else {
break;
+ }
}
XSync(dpy, 0);
/* did we manage to lock everything? */
- if (nlocks != nscreens) {
- cleanup(dpy);
+ if (nlocks != nscreens)
return 1;
- }
/* run post-lock command */
if (argc > 0) {
switch (fork()) {
case -1:
- cleanup(dpy);
die("slock: fork failed: %s\n", strerror(errno));
case 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);
}
}
/* everything is now blank. Wait for the correct password */
-#ifdef HAVE_BSD_AUTH
- readpw(dpy);
-#else
- readpw(dpy, pws);
-#endif
-
- /* password ok, unlock everything and quit */
- cleanup(dpy);
+ readpw(dpy, &rr, locks, nscreens, hash);
return 0;
}