diff options
Diffstat (limited to 'src/libsystemd/sd-id128/id128-util.c')
| -rw-r--r-- | src/libsystemd/sd-id128/id128-util.c | 207 |
1 files changed, 0 insertions, 207 deletions
diff --git a/src/libsystemd/sd-id128/id128-util.c b/src/libsystemd/sd-id128/id128-util.c deleted file mode 100644 index 337eae24b4..0000000000 --- a/src/libsystemd/sd-id128/id128-util.c +++ /dev/null @@ -1,207 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2016 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 <fcntl.h> -#include <unistd.h> - -#include "fd-util.h" -#include "hexdecoct.h" -#include "id128-util.h" -#include "io-util.h" -#include "stdio-util.h" - -char *id128_to_uuid_string(sd_id128_t id, char s[37]) { - unsigned n, k = 0; - - assert(s); - - /* Similar to sd_id128_to_string() but formats the result as UUID instead of plain hex chars */ - - for (n = 0; n < 16; n++) { - - if (IN_SET(n, 4, 6, 8, 10)) - s[k++] = '-'; - - s[k++] = hexchar(id.bytes[n] >> 4); - s[k++] = hexchar(id.bytes[n] & 0xF); - } - - assert(k == 36); - - s[k] = 0; - - return s; -} - -bool id128_is_valid(const char *s) { - size_t i, l; - - assert(s); - - l = strlen(s); - if (l == 32) { - - /* Plain formatted 128bit hex string */ - - for (i = 0; i < l; i++) { - char c = s[i]; - - if (!(c >= '0' && c <= '9') && - !(c >= 'a' && c <= 'z') && - !(c >= 'A' && c <= 'Z')) - return false; - } - - } else if (l == 36) { - - /* Formatted UUID */ - - for (i = 0; i < l; i++) { - char c = s[i]; - - if ((i == 8 || i == 13 || i == 18 || i == 23)) { - if (c != '-') - return false; - } else { - if (!(c >= '0' && c <= '9') && - !(c >= 'a' && c <= 'z') && - !(c >= 'A' && c <= 'Z')) - return false; - } - } - - } else - return false; - - return true; -} - -int id128_read_fd(int fd, Id128Format f, sd_id128_t *ret) { - char buffer[36 + 2]; - ssize_t l; - - assert(fd >= 0); - assert(f < _ID128_FORMAT_MAX); - - /* Reads an 128bit ID from a file, which may either be in plain format (32 hex digits), or in UUID format, both - * optionally followed by a newline and nothing else. ID files should really be newline terminated, but if they - * aren't that's OK too, following the rule of "Be conservative in what you send, be liberal in what you - * accept". */ - - l = loop_read(fd, buffer, sizeof(buffer), false); /* we expect a short read of either 32/33 or 36/37 chars */ - if (l < 0) - return (int) l; - if (l == 0) /* empty? */ - return -ENOMEDIUM; - - switch (l) { - - case 33: /* plain UUID with trailing newline */ - if (buffer[32] != '\n') - return -EINVAL; - - /* fall through */ - case 32: /* plain UUID without trailing newline */ - if (f == ID128_UUID) - return -EINVAL; - - buffer[32] = 0; - break; - - case 37: /* RFC UUID with trailing newline */ - if (buffer[36] != '\n') - return -EINVAL; - - /* fall through */ - case 36: /* RFC UUID without trailing newline */ - if (f == ID128_PLAIN) - return -EINVAL; - - buffer[36] = 0; - break; - - default: - return -EINVAL; - } - - return sd_id128_from_string(buffer, ret); -} - -int id128_read(const char *p, Id128Format f, sd_id128_t *ret) { - _cleanup_close_ int fd = -1; - - fd = open(p, O_RDONLY|O_CLOEXEC|O_NOCTTY); - if (fd < 0) - return -errno; - - return id128_read_fd(fd, f, ret); -} - -int id128_write_fd(int fd, Id128Format f, sd_id128_t id, bool do_sync) { - char buffer[36 + 2]; - size_t sz; - int r; - - assert(fd >= 0); - assert(f < _ID128_FORMAT_MAX); - - if (f != ID128_UUID) { - sd_id128_to_string(id, buffer); - buffer[32] = '\n'; - sz = 33; - } else { - id128_to_uuid_string(id, buffer); - buffer[36] = '\n'; - sz = 37; - } - - r = loop_write(fd, buffer, sz, false); - if (r < 0) - return r; - - if (do_sync) { - if (fsync(fd) < 0) - return -errno; - } - - return r; -} - -int id128_write(const char *p, Id128Format f, sd_id128_t id, bool do_sync) { - _cleanup_close_ int fd = -1; - - fd = open(p, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0444); - if (fd < 0) - return -errno; - - return id128_write_fd(fd, f, id, do_sync); -} - -void id128_hash_func(const void *p, struct siphash *state) { - siphash24_compress(p, 16, state); -} - -int id128_compare_func(const void *a, const void *b) { - return memcmp(a, b, 16); -} - -const struct hash_ops id128_hash_ops = { - .hash = id128_hash_func, - .compare = id128_compare_func, -}; |