aw/slock
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final fixes and cleanups

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This commit is contained in:
Anselm R. Garbe 2007-11-24 21:17:32 +01:00
parent 1fd4e7b23e
commit 6fdf8be204
3 changed files with 20 additions and 18 deletions
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2
README
View File

@ -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.

1
config.mk
View File

@ -5,7 +5,6 @@ VERSION = 0.7
# paths
PREFIX = /usr/local
MANPREFIX = ${PREFIX}/share/man
X11INC = /usr/X11R6/include
X11LIB = /usr/X11R6/lib

35
slock.c
View File

@ -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);