applied Michaels patch

diff --git a/slock.c b/slock.c
index 2dce109..d150009 100644 (file)
--- a/slock.c
+++ b/slock.c
@@ -50,9 +50,9 @@ getpw(void) { /* only run as root */
        const char *rval;
        struct passwd *pw;
 
-       if(geteuid() != 0)
-               die("cannot retrieve password entry (make sure to suid slock)");
        pw = getpwuid(getuid());
+       if(!pw)
+               die("cannot retrieve password entry (make sure to suid or sgid slock)");
        endpwent();
        rval =  pw->pw_passwd;
 
@@ -60,6 +60,8 @@ getpw(void) { /* only run as root */
        {
                struct spwd *sp;
                sp = getspnam(getenv("USER"));
+               if(!sp)
+                       die("slock: cannot retrieve shadow entry (make sure to suid or sgid slock)\n");
                endspent();
                rval = sp->sp_pwdp;
        }