405afbd55
Osama Abdelkader via busybox
2026-02-01
Subject
util-linux: add minimal uuidgen implementation
Binary
No binary (build failed)
Architecture & Compiler Flags
gcc -Wp,-MD,applets/.usage.d -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -Iinclude -Iinclude -o applets/usage applets/usage.c
Build Log
(log yok)
Commit Diff GitHub →
libbb/xfuncs_printf.c+3 -3
| @@ -642,14 +642,14 @@ void FAST_FUNC generate_uuid(uint8_t *buf) | |
| * uint32_t time_low (big endian) | |
| * uint16_t time_mid (big endian) | |
| * uint16_t time_hi_and_version (big endian) | |
| - | * version is a 4-bit field: |
| + | * version is a 4-bit field (most significant 4 bits): |
| * 1 Time-based | |
| * 2 DCE Security, with embedded POSIX UIDs | |
| * 3 Name-based (MD5) | |
| * 4 Randomly generated | |
| * 5 Name-based (SHA-1) | |
| * uint16_t clk_seq_and_variant (big endian) | |
| - | * variant is a 3-bit field: |
| + | * variant is a 3-bit field (most significant 3 bits): |
| * 0xx Reserved, NCS backward compatibility | |
| * 10x The variant specified in rfc4122 | |
| * 110 Reserved, Microsoft backward compatibility | |
| @@ -681,7 +681,7 @@ void FAST_FUNC generate_uuid(uint8_t *buf) | |
| /* version = 4 */ | |
| buf[4 + 2 ] = (buf[4 + 2 ] & 0x0f) | 0x40; | |
| - | /* variant = 10x */ |
| + | /* variant = 10x binary (uppermost 3 bits) */ |
| buf[4 + 2 + 2] = (buf[4 + 2 + 2] & 0x3f) | 0x80; | |
| } | |
util-linux/uuidgen.c+57 -0
| @@ -0,0 +1,57 @@ | |
| + | /* vi: set sw=4 ts=4: */ |
| + | /* |
| + | * Mini uuidgen implementation for busybox |
| + | * |
| + | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
| + | */ |
| + | //config:config UUIDGEN |
| + | //config: bool "uuidgen (1.1 kb)" |
| + | //config: default y |
| + | //config: help |
| + | //config: Generate a UUID (Universally Unique Identifier) in RFC 4122 format. |
| + | |
| + | //applet:IF_UUIDGEN(APPLET_NOFORK(uuidgen, uuidgen, BB_DIR_USR_BIN, BB_SUID_DROP, uuidgen)) |
| + | |
| + | //kbuild:lib-$(CONFIG_UUIDGEN) += uuidgen.o |
| + | |
| + | //usage:#define uuidgen_trivial_usage |
| + | //usage: "" |
| + | //usage:#define uuidgen_full_usage "\n\n" |
| + | //usage: "Generate a random UUID" |
| + | |
| + | /* util-linux 2.41.1: |
| + | * -r, --random generate random-based uuid |
| + | * -t, --time generate time-based uuid |
| + | * -n, --namespace <ns> generate hash-based uuid in this namespace |
| + | * available namespaces: @dns @url @oid @x500 |
| + | * -N, --name <name> generate hash-based uuid from this name |
| + | * -m, --md5 generate md5 hash |
| + | * -C, --count <num> generate more uuids in loop |
| + | * -s, --sha1 generate sha1 hash |
| + | * -6, --time-v6 generate time-based v6 uuid |
| + | * -7, --time-v7 generate time-based v7 uuid |
| + | * -x, --hex interpret name as hex string |
| + | * manpage: |
| + | * "By default uuidgen will generate a random-based UUID if a high-quality random number generator is present. |
| + | * Otherwise, it will choose a time-based UUID." |
| + | */ |
| + | #include "libbb.h" |
| + | #include "volume_id/volume_id_internal.h" |
| + | |
| + | /* This is a NOFORK applet. Be very careful! */ |
| + | |
| + | int uuidgen_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| + | int uuidgen_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM) |
| + | { |
| + | struct volume_id id; |
| + | uint8_t uuid[16]; |
| + | |
| + | /* support/ignore -r (--random) */ |
| + | getopt32(argv, "^" "r" "\0" "=0"/* no args!*/); |
| + | |
| + | generate_uuid(uuid); |
| + | volume_id_set_uuid(&id, uuid, UUID_DCE); |
| + | puts(id.uuid); |
| + | |
| + | return 0; |
| + | } |