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 |