slock

simple X display locker utility
git clone git://git.suckless.org/slock
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commit b02c4d452a7942d4be3c69e6f98dafd35a2e4e78
parent a6dc051e3744ce5b14c54d2d246d3e8258207e76
Author: FRIGN <dev@frign.de>
Date:   Sun, 14 Feb 2016 02:13:54 +0100

Use argv0 instead of passing "slock:" to die every time

Diffstat:
slock.c | 28++++++++++++++++------------
1 file changed, 16 insertions(+), 12 deletions(-)

diff --git a/slock.c b/slock.c @@ -46,6 +46,7 @@ static Bool failure = False; static Bool rr; static int rrevbase; static int rrerrbase; +static char *argv0; static void die(const char *errstr, ...) @@ -53,6 +54,7 @@ die(const char *errstr, ...) va_list ap; va_start(ap, errstr); + fprintf(stderr, "%s: ", argv0); vfprintf(stderr, errstr, ap); va_end(ap); exit(1); @@ -88,9 +90,9 @@ getpw(void) errno = 0; if (!(pw = getpwuid(getuid()))) { if (errno) - die("slock: getpwuid: %s\n", strerror(errno)); + die("getpwuid: %s\n", strerror(errno)); else - die("slock: cannot retrieve password entry\n"); + die("cannot retrieve password entry\n"); } rval = pw->pw_passwd; @@ -98,7 +100,7 @@ getpw(void) if (rval[0] == 'x' && rval[1] == '\0') { struct spwd *sp; if (!(sp = getspnam(getenv("USER")))) - die("slock: cannot retrieve shadow entry (make sure to suid or sgid slock)\n"); + die("cannot retrieve shadow entry (make sure to suid or sgid slock)\n"); rval = sp->sp_pwdp; } #endif @@ -106,7 +108,7 @@ getpw(void) /* 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"); + die("cannot drop privileges\n"); return rval; } #endif @@ -254,7 +256,7 @@ lockscreen(Display *dpy, int screen) usleep(1000); } if (!len) { - fprintf(stderr, "slock: unable to grab mouse pointer for screen %d\n", screen); + fprintf(stderr, "unable to grab mouse pointer for screen %d\n", screen); } else { for (len = 1000; len; len--) { if (XGrabKeyboard(dpy, lock->root, True, GrabModeAsync, GrabModeAsync, CurrentTime) == GrabSuccess) { @@ -264,7 +266,7 @@ lockscreen(Display *dpy, int screen) } usleep(1000); } - fprintf(stderr, "slock: unable to grab keyboard for screen %d\n", screen); + fprintf(stderr, "unable to grab keyboard for screen %d\n", screen); } /* grabbing one of the inputs failed */ running = 0; @@ -281,24 +283,26 @@ main(int argc, char **argv) Display *dpy; int screen; + argv0 = argv[0], argc--, argv++; + #ifdef __linux__ dontkillme(); #endif if (!getpwuid(getuid())) - die("slock: no passwd entry for you\n"); + die("no passwd entry for you\n"); #ifndef HAVE_BSD_AUTH pws = getpw(); #endif if (!(dpy = XOpenDisplay(0))) - die("slock: cannot open display\n"); + die("cannot open display\n"); rr = XRRQueryExtension(dpy, &rrevbase, &rrerrbase); /* Get the number of screens in display "dpy" and blank them all. */ nscreens = ScreenCount(dpy); if (!(locks = malloc(sizeof(Lock*) * nscreens))) - die("slock: malloc: %s\n", strerror(errno)); + die("Out of memory.\n"); int nlocks = 0; for (screen = 0; screen < nscreens; screen++) { if ((locks[screen] = lockscreen(dpy, screen)) != NULL) @@ -313,11 +317,11 @@ main(int argc, char **argv) return 1; } - if (argc >= 2 && fork() == 0) { + if (argc >= 1 && fork() == 0) { if (dpy) close(ConnectionNumber(dpy)); - execvp(argv[1], argv+1); - die("slock: execvp %s failed: %s\n", argv[1], strerror(errno)); + execvp(argv[0], argv); + die("execvp %s failed: %s\n", argv[0], strerror(errno)); } /* Everything is now blank. Now wait for the correct password. */