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

1 files changed, 16 insertions, 12 deletions

diff --git a/slock.c b/slock.c
index 4531f95..a0ffed0 100644
--- 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. */