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https://git.busybox.net/busybox
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3e80101963
function old new delta format_uuid_DCE_37_chars - 94 +94 uuidgen_main 71 53 -18 .rodata 107089 107066 -23 mkswap_main 278 253 -25 volume_id_set_uuid 258 178 -80 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/4 up/down: 94/-146) Total: -52 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini uuidgen implementation for busybox
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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//config:config UUIDGEN
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//config: bool "uuidgen (1.1 kb)"
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//config: default y
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//config: help
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//config: Generate a UUID (Universally Unique Identifier) in RFC 4122 format.
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//applet:IF_UUIDGEN(APPLET_NOFORK(uuidgen, uuidgen, BB_DIR_USR_BIN, BB_SUID_DROP, uuidgen))
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//kbuild:lib-$(CONFIG_UUIDGEN) += uuidgen.o
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//usage:#define uuidgen_trivial_usage
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//usage: ""
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//usage:#define uuidgen_full_usage "\n\n"
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//usage: "Generate a random UUID"
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/* util-linux 2.41.1:
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* -r, --random generate random-based uuid
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* -t, --time generate time-based uuid
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* -n, --namespace <ns> generate hash-based uuid in this namespace
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* available namespaces: @dns @url @oid @x500
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* -N, --name <name> generate hash-based uuid from this name
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* -m, --md5 generate md5 hash
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* -C, --count <num> generate more uuids in loop
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* -s, --sha1 generate sha1 hash
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* -6, --time-v6 generate time-based v6 uuid
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* -7, --time-v7 generate time-based v7 uuid
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* -x, --hex interpret name as hex string
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* manpage:
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* "By default uuidgen will generate a random-based UUID if a high-quality random number generator is present.
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* Otherwise, it will choose a time-based UUID."
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*/
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#include "libbb.h"
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/* This is a NOFORK applet. Be very careful! */
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int uuidgen_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int uuidgen_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
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{
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char str37[37];
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uint8_t uuid[16];
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/* support/ignore -r (--random) */
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getopt32(argv, "^" "r" "\0" "=0"/* no args!*/);
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generate_uuid(uuid);
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format_uuid_DCE_37_chars(str37, uuid);
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puts(str37);
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fflush_stdout_and_exit_SUCCESS();
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}
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