From e61da07522a060da98fa3a56db3d0360469b26cf Mon Sep 17 00:00:00 2001 From: auric <104602845+ihateamongus@users.noreply.github.com> Date: Mon, 8 Sep 2025 21:19:14 -0500 Subject: organize repository layout --- core/slock/slock.c | 576 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 576 insertions(+) create mode 100644 core/slock/slock.c (limited to 'core/slock/slock.c') diff --git a/core/slock/slock.c b/core/slock/slock.c new file mode 100644 index 0000000..962cc1d --- /dev/null +++ b/core/slock/slock.c @@ -0,0 +1,576 @@ +/* See LICENSE file for license details. */ +#define _XOPEN_SOURCE 500 +#if HAVE_SHADOW_H +#include +#endif + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "../accent.h" + +#include "arg.h" +#include "util.h" + +char *argv0; + +enum { + INIT, + INPUT, + FAILED, + NUMCOLS +}; + +struct lock { + int screen; + Window root, win; + Pixmap pmap; + Pixmap bgmap; + unsigned long colors[NUMCOLS]; + XftDraw *draw; +}; + +struct xrandr { + int active; + int evbase; + int errbase; +}; + +#include "config.h" + +static ColorShm *accentshm; +static char accentcol[8] = "#005577"; +static XftFont *font; + +static const char *icon[] = { +" ██████████████ ██████████████ ", +" ██████████████ █████████████ ", +" ██████▓▓▓█████ █████▓▓▓██████ ", +" █████▓▓▓▓█████ █████▓▓▓▓█████ ", +" █████▓▓▓▓█████ █████▓▓▓▓█████ ", +" █████▓▓▓▓▓████ ████▓▓▓▓▓█████ ", +" █████▓▓▓▓▓████████ █████████████████████ ████████▓▓▓▓▓█████ ", +" ██████▓▓▓▓▓▓▓█████ █████████████████████ █████▓▓▓▓▓▓▓██████ ", +"▓▓▓▓▓▓▓▓ ██████▓▓▓▓▓▓▓█████ █████████████████████ █████▓▓▓▓▓▓▓██████ ▓▓▓▓▓▓▓▓", +"▓▓▓▓▓▓▓▓▓ █████▓▓▓▓▓████ ████▓▒▒▒▒▓▓▓▒▒▒▒▓████ ████▓▓▓▓▓█████ ▓▓▓▓▓▓▓▓▓", +"▓▓▓▓▓▓▓▓▓ █████▓▓▓▓▓████ ████▓▒▒▒▒▓▓▓▒▒▒▒▓████ ████▓▓▓▓▓█████ ▓▓▓▓▓▓▓▓▓", +"▓▓▓▓▒░░░▒▓▓▓▓ █████▓▓▓▓▓▓▓▓█████▓▓▓▓▒▒▒▒▒▒▒▒▒▒▒▒▓▓▓█████▓▓▓▓▓▓▓▓█████ ▓▓▓▓▒░░░▒▓▓▓▓", +"▓▓▓▓▒░░░▒▓▓▓▓ █████▓▓▓▓▓▓▓▓█████▓▓▓▓▒▒▒▒▒▒▒▒▒▒▒▒▓▓▓█████▓▓▓▓▓▓▓▓█████ ▓▓▓▓▒░░░░▓▓▓▓", +"▓▓▓▓▒▒▒▒░░░░▒▓▓▓▓ █████████▓▓▓▓▓▒▒▒▓███▓▓▓▓▓▓▓▓█████▓▓▓▓▓▓▓▓███▓▒▒▒▒▓▓▓▓█████████ ▓▓▓▓▒░░░░▒▒▒▒▓▓▓▓", +" ▒▒▒▒▒░░░░▒▓▓▓▓ ██████████▓▓▓▒▒▒▒▓███▓▓▓▓▓███████████▓▓▓▓▓███▓▒▒▒▒▓▓▓▓█████████ ▓▓▓▓▒░░░░▒▒▒▒▒ ", +" ▓▓▓▓▓░░░░▒▒▒▒▓▓▓▓████████████▓▒▒▒▓███████▓▓▓▓█████▓▓▓▓███████▓▒▒▒▒▓████████████▓▓▓▒▒▒▒░░░░▒▓▓▓▓ ", +" ████▓▒░░░░░░▒▒▓▓▓████████████▓▒▒▒▓████████▓▓▓▓▓▓▓▓▓▓▓████████▓▒▒▒▓████████████▓▓▓▓▒░░░░░░░▓████ ", +" ████▓▒▒▒▒░░░░▒▓▓▓▓███████████▓▒▒▒▓▓▓▓████▓▒▒▒▒▒▒▒▒▒▒▒▓████▓▓▓▓▒▒▒▓████████████▓▓▓▒▒░░░▒▒▒▒▓████ ", +" ▓▓▓▓▓▒░░░▒▒▒▒▓▓▓▓▓███████▓▒▒▒▒▒▒▒▓███▒░░░░░░░░░░░▒▓██▓▒▒▒▒▒▒▒▒▓██████▓▓▓▓▓▒▒▒▒░░░▒▓▓▓▓▓ ", +" ▓▓▓▓▓▒░░░▒▒▒▒▒▓▓▓▓███████▓▒▒▒▒▒▒▒▓███▒░░░░░░░░░░▒▓██▓▒▒▒▒▒▒▒▓▓██████▓▓▓▓▓▒▒▒▒░░░▒▓▓▓▓▓ ", +" ▓▓▓▓▓▒░░░▒▒▒▒▒▒▒▒▓▓▓▓████▓▓▓▒▒░░░▒███▒░░░░░░░░░░░▒▓██▓░░░▒▒▓▓▓████▓▓▓▓▒▒▒▒▒▒▒▒░░░▒▓▓▓▓▓ ", +" ▓▓▓▓▓▒░░░▒▒▒▒▒▒▒▒▓▓▓▓████▓▓▓▒▒░░░▒███▒░░░░░░░░░░░▒▓██▓░░░▒▒▓▓▓████▓▓▓▓▒▒▒▒▒▒▒▒░░░▒▓▓▓▓▓ ", +" ▓▓▓▓▓▓▒▒▒▒▒▒▒▒▒▒▒▓██████▓▒░░░░░░░▒▒▒▒▒▒▒▒▒▒▒▒▒▒░░░░░░▒▓██████▓▒▒▒▒▒▒▒▒▒▒▒▓▓▓▓▓▓ ", +" ▓▓▓▓▓▓▒▒▒▒▒▒▒▒▒▒▒▓██████▓▒░░░░░░░▒▒▒▒▒▒▒▒▒▒▒▒▒░░░░░░░▒▓██████▓▒▒▒▒▒▒▒▒▒▒▒▓▓▓▓▓▓ ", +" ████▓▓▒▒▒▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▒▒▒▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▒▒▒▒▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▒▒▒▓▓████ ", +" ████▓▓▒▒▒▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓███▓▓▓▓▓▓▓▓▓▓▓▓▓███▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▒▒▒▓▓████ ", +" █████▓▓▓▓▓███▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓███▓▓▓▓█████ ", +" █████████████▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓█████████████ ", +" █████▓▓▓▓████▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓████▓▓▓▓█████ ", +" ████▓▓▒▒▒▓███████████▓▓▓▓▓▓▓▓▒░░░░░░░░░░░░░░░░░░░▒▒▓▓▓▓▓▓▓███████████▓▒▒▒▒▓████ ", +" ████▓▓▓▓▒▒▒▒▓▓▓▓████████▓▓▓▓▓▓▓▓▒▒▒▒▒░░░░░░░░░░░░▒▒▒▒▓▓▓▓▓▓▓▓█████████▓▓▓▒▒▒▒▓▓▓▓████ ", +" █████▓▒▒▒▒▒▒▒▒▓▓▓▓▓▓▓████████████▓▓▓▓▒░░░░░░░░░░░▒▓▓▓▓████████████▓▓▓▓▓▓▓▒▒▒▒▒▒▒▒▓█████ ", +" █████▓▒▒▒▒▒▒▒▒▓▓▓▓▓▓▓████████████▓▓▓▓▒░░░░░░░░░░░▒▓▓▓▓████████████▓▓▓▓▓▓▓▒▒▒▒▒▒▒▒▓█████ ", +" █████▓▒▒▒▓▓▓▓▓▓▓▓▓▓▓▓▓███████████████████████████████████████████▓▓▓▓▓▓▓▓▓▓▓▓▓▒▒▒▓█████ ", +" █████▓▒▒▒▓▓▓▓▓▓▓▓▓▓▓▓▓██████████████████████████████████████████▓▓▓▓▓▓▓▓▓▓▓▓▓▒▒▒▓█████ ", +" █████▓▓▓▓▓▓▓▓▓▓▓▓█████████████████████▓▓▓██████▓▓█████████████████████▓▓▓▓▓▓▓▓▓▓▓▓█████ ", +" ██████▓▓▓▓▓▓▓▓████████▓▓▓█████████████▓▓▓█████▓▓▓█████████████▓▓▓████████▓▓▓▓▓▓▓▓▓█████ ", +" █████████▓▓▓▓▓████████▓▓▓▓████████████▓▓▓█████▓▓▓▓████████████▓▓▓████████▓▓▓▓▓█████████ ", +" █████▓▓▓▓▓████████▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓█████▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓████████▓▓▓▓▓█████ ", +" ██████▓▓▓▓▓▓▓████████▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓█████▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓████████▓▓▓▓▓▓▓▓█████ ", +" ██████▓▓▓▓▓▓▓▓████████▓▓▓█████████▓▓▓▓▓▓▓▓▓▓▓█████████▓▓▓████████▓▓▓▓▓▓▓▓██████ ", +" ██████▓▓▓▓▓▓▓▓████████████████████▓▓▓▓▓▓▓▓▓▓▓████████████████████▓▓▓▓▓▓▓▓██████ ", +" ██████████████████████████████████▓▓▓▓▓▓▓▓▓▓▓██████████████████████████████████ ", +" ██████████████████████████████████▓▓▓▓▓▓▓▓▓▓▓██████████████████████████████████ ", +" ██████▓▓▓▓▓▓██████▓▓▓████▓▓▓▓▓████▓▓▓██████▓▓▓▓▓▓▓█████ ", +" ██████▓▓▓▓▓▓▓█████▓▓▓████▓▓▓▓▓████▓▓▓██████▓▓▓▓▓▓▓█████ ", +" █████▓▓▓▓▓▓▓▓█████████████████████████████▓▓▓▓▓▓▓▓█████ ", +" █████▓▓▓▓▓▓▓▓█████████▓▓▓█████▓▓▓█████████▓▓▓▓▓▓▓▓█████ ", +" ██████▓▓▓▓▓▓▓█████████▓▓▓▓███▓▓▓▓██████████▓▓▓▓▓▓██████ ", +" ██████████████████▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓██████████████████ ", +" █████████████████████▓▓▓▓▓▓▓▓▓▓▓▓▓█████████████████████ ", +" ████████████████▓▓▓▓▓▓▓▓▓▓▓██████████████████ ", +" ██████████████████████████████████████████████ ", +" █████████████ ", +" █████████████ ", +NULL}; + +static void +updateaccent(void) +{ + if (!readaccent(&accentshm, accentcol)) + memcpy(accentcol, "#005577", 8); +} + +static void +drawlogo(Display *dpy, struct lock *lock, const char *col) +{ + XftColor xftc; + XGlyphInfo ext; + int i, x, y, w, h, lines = 0, maxw = 0, lineh; + size_t len; + + w = DisplayWidth(dpy, lock->screen); + h = DisplayHeight(dpy, lock->screen); + lineh = font->ascent + font->descent; + + for (i = 0; icon[i]; i++) { + len = strlen(icon[i]); + while (len && icon[i][len - 1] == ' ') + len--; + XftTextExtentsUtf8(dpy, font, (FcChar8 *)icon[i], len, &ext); + if (ext.xOff > maxw) + maxw = ext.xOff; + lines++; + } + x = (w - maxw) / 2; + y = (h - lines * lineh) / 2 + font->ascent; + + if (!XftColorAllocName(dpy, DefaultVisual(dpy, lock->screen), + DefaultColormap(dpy, lock->screen), col, &xftc)) + return; + + XClearWindow(dpy, lock->win); + for (i = 0; icon[i]; i++) { + len = strlen(icon[i]); + while (len && icon[i][len - 1] == ' ') + len--; + XftDrawStringUtf8(lock->draw, &xftc, font, x, y, + (FcChar8 *)icon[i], len); + y += lineh; + } + + XftColorFree(dpy, DefaultVisual(dpy, lock->screen), + DefaultColormap(dpy, lock->screen), &xftc); +} + +static void +blurbackground(Display *dpy, struct lock *lock) +{ + int w = DisplayWidth(dpy, lock->screen); + int h = DisplayHeight(dpy, lock->screen); + + imlib_context_set_display(dpy); + imlib_context_set_visual(DefaultVisual(dpy, lock->screen)); + imlib_context_set_colormap(DefaultColormap(dpy, lock->screen)); + imlib_context_set_drawable(lock->root); + + Imlib_Image img = imlib_create_image_from_drawable(0, 0, 0, w, h, 1); + if (!img) + return; + imlib_context_set_image(img); + imlib_image_blur(20); + + lock->bgmap = XCreatePixmap(dpy, lock->root, w, h, + DefaultDepth(dpy, lock->screen)); + imlib_context_set_drawable(lock->bgmap); + imlib_render_image_on_drawable(0, 0); + imlib_free_image(); + + XSetWindowBackgroundPixmap(dpy, lock->win, lock->bgmap); +} + +static void +die(const char *errstr, ...) +{ + va_list ap; + + va_start(ap, errstr); + vfprintf(stderr, errstr, ap); + va_end(ap); + exit(1); +} + +#ifdef __linux__ +#include +#include + +static void +dontkillme(void) +{ + FILE *f; + const char oomfile[] = "/proc/self/oom_score_adj"; + + if (!(f = fopen(oomfile, "w"))) { + if (errno == ENOENT) + return; + die("slock: fopen %s: %s\n", oomfile, strerror(errno)); + } + fprintf(f, "%d", OOM_SCORE_ADJ_MIN); + if (fclose(f)) { + if (errno == EACCES) + die("slock: unable to disable OOM killer. " + "Make sure to suid or sgid slock.\n"); + else + die("slock: fclose %s: %s\n", oomfile, strerror(errno)); + } +} +#endif + +static const char * +gethash(void) +{ + const char *hash; + struct passwd *pw; + + /* Check if the current user has a password entry */ + errno = 0; + if (!(pw = getpwuid(getuid()))) { + if (errno) + die("slock: getpwuid: %s\n", strerror(errno)); + else + die("slock: cannot retrieve password entry\n"); + } + hash = pw->pw_passwd; + +#if HAVE_SHADOW_H + if (!strcmp(hash, "x")) { + struct spwd *sp; + 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 (!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 */ + + return hash; +} + +static void +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; + unsigned int len; + KeySym ksym; + XEvent ev; + struct pollfd pfd; + time_t last; + const char *col, *oldcol = NULL; + char lastaccent[8]; + + len = 0; + running = 1; + failure = 0; + + updateaccent(); + memcpy(lastaccent, accentcol, 8); + col = accentcol; + last = time(NULL); + for (screen = 0; screen < nscreens; screen++) + drawlogo(dpy, locks[screen], col); + + pfd.fd = ConnectionNumber(dpy); + pfd.events = POLLIN; + + while (running) { + /* poll at ~60Hz so accent gradients appear smooth */ + if (poll(&pfd, 1, 5) > 0) { + while (XPending(dpy)) { + XNextEvent(dpy, &ev); + if (ev.type == KeyPress) { + last = time(NULL); + explicit_bzero(&buf, sizeof(buf)); + 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'; + errno = 0; + if (!(inputhash = crypt(passwd, hash))) + fprintf(stderr, "slock: crypt: %s\n", strerror(errno)); + else + running = !!strcmp(inputhash, hash); + if (running) { + XBell(dpy, 100); + failure = 1; + } + explicit_bzero(&passwd, sizeof(passwd)); + len = 0; + break; + case XK_Escape: + explicit_bzero(&passwd, sizeof(passwd)); + len = 0; + break; + case XK_BackSpace: + if (len) + passwd[--len] = '\0'; + break; + default: + if (num && !iscntrl((int)buf[0]) && + (len + num < sizeof(passwd))) { + memcpy(passwd + len, buf, num); + len += num; + } else if (buf[0] == '\025') { /* ctrl-u clears input */ + explicit_bzero(&passwd, sizeof(passwd)); + len = 0; + } + break; + } + } else if (rr->active && ev.type == rr->evbase + RRScreenChangeNotify) { + rre = (XRRScreenChangeNotifyEvent*)&ev; + for (screen = 0; screen < nscreens; screen++) { + if (locks[screen]->win == rre->window) { + 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); + drawlogo(dpy, locks[screen], col); + break; + } + } + } else { + for (screen = 0; screen < nscreens; screen++) + XRaiseWindow(dpy, locks[screen]->win); + } + } + } + + updateaccent(); + int idle = time(NULL) - last >= 3; + + if (!idle && len) + col = colorname[INPUT]; + else if (!idle && (failure || failonclear)) + col = colorname[FAILED]; + else + col = accentcol; + + if ((col == accentcol && memcmp(accentcol, lastaccent, 8) != 0) || col != oldcol) { + memcpy(lastaccent, accentcol, 8); + for (screen = 0; screen < nscreens; screen++) + drawlogo(dpy, locks[screen], col); + oldcol = col; + } + } +} + +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; + struct lock *lock; + XColor color, dummy; + XSetWindowAttributes wa; + Cursor invisible; + + 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); + 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->pmap = XCreateBitmapFromData(dpy, lock->win, curs, 8, 8); + invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap, + &color, &color, 0, 0); + XDefineCursor(dpy, lock->win, invisible); + + blurbackground(dpy, lock); + + if (!font) + font = XftFontOpenName(dpy, lock->screen, "monospace:size=10"); + lock->draw = XftDrawCreate(dpy, lock->win, + DefaultVisual(dpy, lock->screen), + DefaultColormap(dpy, lock->screen)); + + /* 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); + } + if (kbgrab != GrabSuccess) { + kbgrab = XGrabKeyboard(dpy, lock->root, True, + GrabModeAsync, GrabModeAsync, CurrentTime); + } + + /* input is grabbed: we can lock the screen */ + if (ptgrab == GrabSuccess && kbgrab == GrabSuccess) { + XMapRaised(dpy, lock->win); + if (rr->active) + XRRSelectInput(dpy, lock->win, RRScreenChangeNotifyMask); + + XSelectInput(dpy, lock->root, SubstructureNotifyMask); + return lock; + } + + /* retry on AlreadyGrabbed but fail on other errors */ + if ((ptgrab != AlreadyGrabbed && ptgrab != GrabSuccess) || + (kbgrab != AlreadyGrabbed && kbgrab != GrabSuccess)) + break; + + usleep(100000); + } + + /* we couldn't grab all input: fail out */ + if (ptgrab != GrabSuccess) + 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); + return NULL; +} + +static void +usage(void) +{ + die("usage: slock [-v] [cmd [arg ...]]\n"); +} + +int +main(int argc, char **argv) { + 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, nscreens; + + ARGBEGIN { + case 'v': + puts("slock-"VERSION); + 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 + + hash = gethash(); + errno = 0; + 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.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(struct lock *)))) + die("slock: out of memory\n"); + for (nlocks = 0, s = 0; s < nscreens; s++) { + if ((locks[s] = lockscreen(dpy, &rr, s)) != NULL) + nlocks++; + else + break; + } + XSync(dpy, 0); + + /* did we manage to lock everything? */ + if (nlocks != nscreens) + return 1; + + /* run post-lock command */ + if (argc > 0) { + pid_t pid; + extern char **environ; + int err = posix_spawnp(&pid, argv[0], NULL, NULL, argv, environ); + if (err) { + die("slock: failed to execute post-lock command: %s: %s\n", + argv[0], strerror(err)); + } + } + + /* everything is now blank. Wait for the correct password */ + readpw(dpy, &rr, locks, nscreens, hash); + + return 0; +} -- cgit v1.2.3