CHROMIUMOS: Escape | and & characters when passing to the shell.

dhcp.c

 /* 
  * dhcpcd - DHCP client daemon
  * Copyright (c) 2006-2009 Roy Marples <roy@marples.name>
  * All rights reserved
 
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 1122 matching lines @@
                                 s += r;
                         } else
                                 bytes += 4;
                         continue;
                 }
                 switch (c) {
                 case '"':  /* FALLTHROUGH */
                 case '\'': /* FALLTHROUGH */
                 case '$':  /* FALLTHROUGH */
                 case '`':  /* FALLTHROUGH */
-                case '\\':
+                case '\\': /* FALLTHROUGH */
+                case '|':  /* FALLTHROUGH */
+                case '&':
                         if (s) {
                                 if (len < 3) {
                                         errno = ENOBUFS;
                                         return -1;
                                 }
                                 *s++ = '\\';
                                 len--;
                         }
                         bytes++;
                         break;
@@ skipping 237 matching lines @@
                         lease->leasetime = ~0U; /* Infinite lease */
         } else
                 lease->leasetime = ~0U; /* Default to infinite lease */
         if (get_option_uint32(&lease->renewaltime, dhcp, DHO_RENEWALTIME) != 0)
                 lease->renewaltime = 0;
         if (get_option_uint32(&lease->rebindtime, dhcp, DHO_REBINDTIME) != 0)
                 lease->rebindtime = 0;
         if (get_option_addr(&lease->server, dhcp, DHO_SERVERID) != 0)
                 lease->server.s_addr = INADDR_ANY;
 }