diff options
Diffstat (limited to 'src/libsystemd/sd-id128/sd-id128.c')
| -rw-r--r-- | src/libsystemd/sd-id128/sd-id128.c | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/src/libsystemd/sd-id128/sd-id128.c b/src/libsystemd/sd-id128/sd-id128.c deleted file mode 100644 index d4450c70a0..0000000000 --- a/src/libsystemd/sd-id128/sd-id128.c +++ /dev/null @@ -1,183 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2011 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <errno.h> -#include <fcntl.h> -#include <unistd.h> - -#include "sd-id128.h" - -#include "fd-util.h" -#include "hexdecoct.h" -#include "id128-util.h" -#include "io-util.h" -#include "macro.h" -#include "random-util.h" -#include "util.h" - -_public_ char *sd_id128_to_string(sd_id128_t id, char s[SD_ID128_STRING_MAX]) { - unsigned n; - - assert_return(s, NULL); - - for (n = 0; n < 16; n++) { - s[n*2] = hexchar(id.bytes[n] >> 4); - s[n*2+1] = hexchar(id.bytes[n] & 0xF); - } - - s[32] = 0; - - return s; -} - -_public_ int sd_id128_from_string(const char s[], sd_id128_t *ret) { - unsigned n, i; - sd_id128_t t; - bool is_guid = false; - - assert_return(s, -EINVAL); - - for (n = 0, i = 0; n < 16;) { - int a, b; - - if (s[i] == '-') { - /* Is this a GUID? Then be nice, and skip over - * the dashes */ - - if (i == 8) - is_guid = true; - else if (i == 13 || i == 18 || i == 23) { - if (!is_guid) - return -EINVAL; - } else - return -EINVAL; - - i++; - continue; - } - - a = unhexchar(s[i++]); - if (a < 0) - return -EINVAL; - - b = unhexchar(s[i++]); - if (b < 0) - return -EINVAL; - - t.bytes[n++] = (a << 4) | b; - } - - if (i != (is_guid ? 36 : 32)) - return -EINVAL; - - if (s[i] != 0) - return -EINVAL; - - if (ret) - *ret = t; - return 0; -} - -_public_ int sd_id128_get_machine(sd_id128_t *ret) { - static thread_local sd_id128_t saved_machine_id = {}; - int r; - - assert_return(ret, -EINVAL); - - if (sd_id128_is_null(saved_machine_id)) { - r = id128_read("/etc/machine-id", ID128_PLAIN, &saved_machine_id); - if (r < 0) - return r; - - if (sd_id128_is_null(saved_machine_id)) - return -EINVAL; - } - - *ret = saved_machine_id; - return 0; -} - -_public_ int sd_id128_get_boot(sd_id128_t *ret) { - static thread_local sd_id128_t saved_boot_id = {}; - int r; - - assert_return(ret, -EINVAL); - - if (sd_id128_is_null(saved_boot_id)) { - r = id128_read("/proc/sys/kernel/random/boot_id", ID128_UUID, &saved_boot_id); - if (r < 0) - return r; - } - - *ret = saved_boot_id; - return 0; -} - -_public_ int sd_id128_get_invocation(sd_id128_t *ret) { - static thread_local sd_id128_t saved_invocation_id = {}; - int r; - - assert_return(ret, -EINVAL); - - if (sd_id128_is_null(saved_invocation_id)) { - const char *e; - - e = secure_getenv("INVOCATION_ID"); - if (!e) - return -ENXIO; - - r = sd_id128_from_string(e, &saved_invocation_id); - if (r < 0) - return r; - } - - *ret = saved_invocation_id; - return 0; -} - -static sd_id128_t make_v4_uuid(sd_id128_t id) { - /* Stolen from generate_random_uuid() of drivers/char/random.c - * in the kernel sources */ - - /* Set UUID version to 4 --- truly random generation */ - id.bytes[6] = (id.bytes[6] & 0x0F) | 0x40; - - /* Set the UUID variant to DCE */ - id.bytes[8] = (id.bytes[8] & 0x3F) | 0x80; - - return id; -} - -_public_ int sd_id128_randomize(sd_id128_t *ret) { - sd_id128_t t; - int r; - - assert_return(ret, -EINVAL); - - r = dev_urandom(&t, sizeof(t)); - if (r < 0) - return r; - - /* Turn this into a valid v4 UUID, to be nice. Note that we - * only guarantee this for newly generated UUIDs, not for - * pre-existing ones. */ - - *ret = make_v4_uuid(t); - return 0; -} |