diff options
Diffstat (limited to 'src/libsystemd-id128/sd-id128.c')
| -rw-r--r-- | src/libsystemd-id128/sd-id128.c | 221 |
1 files changed, 0 insertions, 221 deletions
diff --git a/src/libsystemd-id128/sd-id128.c b/src/libsystemd-id128/sd-id128.c deleted file mode 100644 index 4286ae7d14..0000000000 --- a/src/libsystemd-id128/sd-id128.c +++ /dev/null @@ -1,221 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -/*** - 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 "util.h" -#include "macro.h" - -_public_ char *sd_id128_to_string(sd_id128_t id, char s[33]) { - unsigned n; - - if (!s) - return 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[33], sd_id128_t *ret) { - unsigned n; - sd_id128_t t; - - if (!s) - return -EINVAL; - if (!ret) - return -EINVAL; - - for (n = 0; n < 16; n++) { - int a, b; - - a = unhexchar(s[n*2]); - if (a < 0) - return -EINVAL; - - b = unhexchar(s[n*2+1]); - if (b < 0) - return -EINVAL; - - t.bytes[n] = (a << 4) | b; - } - - if (s[32] != 0) - return -EINVAL; - - *ret = t; - 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_get_machine(sd_id128_t *ret) { - static __thread sd_id128_t saved_machine_id; - static __thread bool saved_machine_id_valid = false; - int fd; - char buf[32]; - ssize_t k; - unsigned j; - sd_id128_t t; - - if (!ret) - return -EINVAL; - - if (saved_machine_id_valid) { - *ret = saved_machine_id; - return 0; - } - - fd = open("/etc/machine-id", O_RDONLY|O_CLOEXEC|O_NOCTTY); - if (fd < 0) - return -errno; - - k = loop_read(fd, buf, 32, false); - close_nointr_nofail(fd); - - if (k < 0) - return (int) k; - - if (k < 32) - return -EIO; - - for (j = 0; j < 16; j++) { - int a, b; - - a = unhexchar(buf[j*2]); - b = unhexchar(buf[j*2+1]); - - if (a < 0 || b < 0) - return -EIO; - - t.bytes[j] = a << 4 | b; - } - - saved_machine_id = t; - saved_machine_id_valid = true; - - *ret = t; - return 0; -} - -_public_ int sd_id128_get_boot(sd_id128_t *ret) { - static __thread sd_id128_t saved_boot_id; - static __thread bool saved_boot_id_valid = false; - int fd; - char buf[36]; - ssize_t k; - unsigned j; - sd_id128_t t; - char *p; - - if (!ret) - return -EINVAL; - - if (saved_boot_id_valid) { - *ret = saved_boot_id; - return 0; - } - - fd = open("/proc/sys/kernel/random/boot_id", O_RDONLY|O_CLOEXEC|O_NOCTTY); - if (fd < 0) - return -errno; - - k = loop_read(fd, buf, 36, false); - close_nointr_nofail(fd); - - if (k < 0) - return (int) k; - - if (k < 36) - return -EIO; - - for (j = 0, p = buf; j < 16; j++) { - int a, b; - - if (*p == '-') - p++; - - a = unhexchar(p[0]); - b = unhexchar(p[1]); - - if (a < 0 || b < 0) - return -EIO; - - t.bytes[j] = a << 4 | b; - - p += 2; - } - - saved_boot_id = t; - saved_boot_id_valid = true; - - *ret = t; - return 0; -} - -_public_ int sd_id128_randomize(sd_id128_t *ret) { - int fd; - ssize_t k; - sd_id128_t t; - - if (!ret) - return -EINVAL; - - fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY); - if (fd < 0) - return -errno; - - k = loop_read(fd, &t, 16, false); - close_nointr_nofail(fd); - - if (k < 0) - return (int) k; - - if (k < 16) - return -EIO; - - /* 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; -} |