Rebase Cradlepoint changes over busybox v1.36.0

Fixed rejects in the following files:

 ./include/libbb.h
 ./libbb/verror_msg.c
 ./networking/udhcp/common.c
 ./sysklogd/syslogd.c
 ./Makefile
 ./networking/udhcp/dhcpc.c

Fixed the data structure names to the latest (client_config in dhcpc.c)
Fixed the compiler warning for local address (filename2modname in modutils.c)
Fixed the redefined functions (bb_info_msg)

Change-Id: Ib1f9b28212476f974f20b16c7a393aaf0158f64a
diff --git a/modutils/modprobe-small.c b/modutils/modprobe-small.c
index b616516..e3f4f09 100644
--- a/modutils/modprobe-small.c
+++ b/modutils/modprobe-small.c
@@ -484,7 +484,8 @@
 	if (is_depmod && (option_mask32 & DEPMOD_OPT_n))
 		return STDOUT_FILENO;
 
-	fd = open(DEPFILE_BB".new", O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0644);
+	/* Cradlepoint (CP) changed the mode 0644 => 0600 */
+	fd = open(DEPFILE_BB".new", O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600);
 	if (fd < 0) {
 		if (errno == EEXIST) {
 			int count = 5 * 20;
@@ -499,7 +500,8 @@
 					break;
 			}
 			bb_error_msg("deleting stale %s", DEPFILE_BB".new");
-			fd = open_or_warn(DEPFILE_BB".new", O_WRONLY | O_CREAT | O_TRUNC);
+			/* Cradlepoint (CP) open => open3 with 0600 */
+			fd = open3_or_warn(DEPFILE_BB".new", O_WRONLY | O_CREAT | O_TRUNC, 0600);
 		}
 	}
 	dbg1_error_msg("opened "DEPFILE_BB".new:%d", fd);
@@ -515,9 +517,14 @@
 	fp = xfdopen_for_write(fd);
 	i = 0;
 	while (modinfo[i].pathname) {
+	/* Cradlepoint (CP) fix null pointer deref in fprint args */
 		fprintf(fp, "%s%s%s\n" "%s%s\n",
-			modinfo[i].pathname, modinfo[i].aliases[0] ? " " : "", modinfo[i].aliases,
-			modinfo[i].deps, modinfo[i].deps[0] ? "\n" : "");
+			modinfo[i].pathname,
+			modinfo[i].aliases && modinfo[i].aliases[0] ? " " : "",
+			modinfo[i].aliases ? modinfo[i].aliases : "",
+
+			modinfo[i].deps ? modinfo[i].deps : "",
+			modinfo[i].deps && modinfo[i].deps[0] ? "\n" : "");
 		i++;
 	}
 	/* Badly formatted depfile is a no-no. Be paranoid. */
diff --git a/modutils/modutils.c b/modutils/modutils.c
index f7ad5e8..2006c39 100644
--- a/modutils/modutils.c
+++ b/modutils/modutils.c
@@ -98,7 +98,8 @@
 	if (filename == NULL)
 		return NULL;
 	if (modname == NULL)
-		modname = local_modname;
+		return NULL;
+	//	modname = local_modname;
 	// Disabled since otherwise "modprobe dir/name" would work
 	// as if it is "modprobe name". It is unclear why
 	// 'basenamization' was here in the first place.