blob: 5b47de1bc00c3d5b7ba141f3fd7bb3428f391746
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Mini hostid implementation for busybox |
4 | * |
5 | * Copyright (C) 2000 Edward Betts <edward@debian.org>. |
6 | * |
7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
8 | */ |
9 | //config:config HOSTID |
10 | //config: bool "hostid" |
11 | //config: default y |
12 | //config: help |
13 | //config: hostid prints the numeric identifier (in hexadecimal) for |
14 | //config: the current host. |
15 | |
16 | //applet:IF_HOSTID(APPLET_NOFORK(hostid, hostid, BB_DIR_USR_BIN, BB_SUID_DROP, hostid)) |
17 | |
18 | //kbuild:lib-$(CONFIG_HOSTID) += hostid.o |
19 | |
20 | /* BB_AUDIT SUSv3 N/A -- Matches GNU behavior. */ |
21 | |
22 | //usage:#define hostid_trivial_usage |
23 | //usage: "" |
24 | //usage:#define hostid_full_usage "\n\n" |
25 | //usage: "Print out a unique 32-bit identifier for the machine" |
26 | |
27 | #include "libbb.h" |
28 | |
29 | /* This is a NOFORK applet. Be very careful! */ |
30 | |
31 | int hostid_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
32 | int hostid_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM) |
33 | { |
34 | if (argv[1]) { |
35 | bb_show_usage(); |
36 | } |
37 | |
38 | /* POSIX says gethostid returns a "32-bit identifier" */ |
39 | printf("%08x\n", (unsigned)(uint32_t)gethostid()); |
40 | |
41 | return fflush_all(); |
42 | } |
43 |