src/usr.sbin/ppp/pppctl/pppctl.c getpass() NULL check

[Jared Yanovich <jjy2+_(_at_)_pitt_(_dot_)_edu>]

getpass(3) says getpass() can return NULL under unfortunate
circumstances.

	- Jared

Index: pppctl.c
===================================================================
RCS file: /cvs/src/usr.sbin/ppp/pppctl/pppctl.c,v
retrieving revision 1.15
diff -u -r1.15 pppctl.c
--- pppctl.c	31 Oct 2003 08:48:16 -0000	1.15
+++ pppctl.c	13 Nov 2003 04:14:18 -0000
@@ -120,11 +120,12 @@
             for (last = Buffer+len-2; last > Buffer && *last != ' '; last--)
                 ;
             if (last > Buffer+3 && !strncmp(last-3, " on", 3)) {
-                 /* a password is required ! */
+                 /* a password is required! */
                  if (display & REC_PASSWD) {
                     /* password time */
                     if (!passwd)
-                        passwd = getpass("Password: ");
+                        if ((passwd = getpass("Password: ")) == NULL)
+			    err(1, "getpass");
                     snprintf(Buffer, sizeof Buffer, "passwd %s\n", passwd);
                     memset(passwd, '\0', strlen(passwd));
                     if (display & REC_VERBOSE)