Add the "install" applet, move get_ug_id to libbb as its used by chown,

chgrp and install.

libbb/Makefile.in

@@ -30,7 +30,7 @@ LIBBB_SRC:= \
 	create_icmp6_socket.c device_open.c dump.c error_msg.c \
 	error_msg_and_die.c find_mount_point.c find_pid_by_name.c \
 	find_root_device.c fgets_str.c full_read.c full_write.c get_console.c \
-	get_last_path_component.c get_line_from_file.c \
+	get_last_path_component.c get_line_from_file.c get_ug_id.c \
 	get_terminal_width_height.c herror_msg.c herror_msg_and_die.c \
 	human_readable.c inet_common.c inode_hash.c interface.c isdirectory.c \
 	kernel_version.c last_char_is.c llist_add_to.c login.c loop.c \

libbb/get_ug_id.c

@@ -0,0 +1,28 @@
+/*
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+extern unsigned long get_ug_id(const char *s, long (*my_getxxnam)(const char *))
+{
+	unsigned long r;
+	char *p;
+
+	r = strtoul(s, &p, 10);
+	if (*p || (s == p)) {
+		r = my_getxxnam(s);
+	}
+
+	return r;
+}