slock

simple X display locker utility
git clone git://git.suckless.org/slock
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commit 6fdf8be2044145c11f7e1eb165613f791c514520
parent 1fd4e7b23e872c16902d222b6c870116c948903c
Author: Anselm R. Garbe <garbeam@gmail.com>
Date:   Sat, 24 Nov 2007 21:17:32 +0100

final fixes and cleanups
Diffstat:
README | 2+-
config.mk | 1-
slock.c | 35+++++++++++++++++++----------------
3 files changed, 20 insertions(+), 18 deletions(-)

diff --git a/README b/README @@ -21,4 +21,4 @@ necessary as root): Running slock ------------- -Simply invoke the 'slock' command. +Simply invoke the 'slock' command. To get out of it, enter your password. diff --git a/config.mk b/config.mk @@ -5,7 +5,6 @@ VERSION = 0.7 # paths PREFIX = /usr/local -MANPREFIX = ${PREFIX}/share/man X11INC = /usr/X11R6/include X11LIB = /usr/X11R6/lib diff --git a/slock.c b/slock.c @@ -7,6 +7,7 @@ #include <ctype.h> #include <pwd.h> +#include <stdarg.h> #include <stdlib.h> #include <stdio.h> #include <string.h> @@ -16,15 +17,23 @@ #include <X11/Xlib.h> #include <X11/Xutil.h> +void +eprint(const char *errstr, ...) { + va_list ap; + + va_start(ap, errstr); + vfprintf(stderr, errstr, ap); + va_end(ap); + exit(EXIT_FAILURE); +} + const char * get_password() { /* only run as root */ const char *rval; struct passwd *pw; - if(geteuid() != 0) { - fputs("slock: cannot retrieve password entry (make sure to suid slock)\n", stderr); - exit(EXIT_FAILURE); - } + if(geteuid() != 0) + eprint("slock: cannot retrieve password entry (make sure to suid slock)\n"); pw = getpwuid(getuid()); endpwent(); rval = pw->pw_passwd; @@ -38,10 +47,8 @@ get_password() { /* only run as root */ } #endif /* drop privileges */ - if(setgid(pw->pw_gid) < 0 || setuid(pw->pw_uid) < 0) { - fputs("slock: cannot drop privileges\n",stdout); - exit(EXIT_FAILURE); - } + if(setgid(pw->pw_gid) < 0 || setuid(pw->pw_uid) < 0) + eprint("slock: cannot drop privileges\n"); return rval; } @@ -62,15 +69,11 @@ main(int argc, char **argv) { XEvent ev; XSetWindowAttributes wa; - if((argc > 1) && !strncmp(argv[1], "-v", 3)) { - fputs("slock-"VERSION", © 2006-2007 Anselm R. Garbe\n", stdout); - exit(EXIT_SUCCESS); - } + if((argc > 1) && !strncmp(argv[1], "-v", 3)) + eprint("slock-"VERSION", © 2006-2007 Anselm R. Garbe, Sander van Dijk\n"); pws = get_password(); - if(!(dpy = XOpenDisplay(0))) { - fputs("slock: cannot open display\n", stderr); - exit(EXIT_FAILURE); - } + if(!(dpy = XOpenDisplay(0))) + eprint("slock: cannot open display\n"); screen = DefaultScreen(dpy); root = RootWindow(dpy, screen);