diff options
Diffstat (limited to 'src/core/machine-id-setup.c')
| -rw-r--r-- | src/core/machine-id-setup.c | 44 |
1 files changed, 34 insertions, 10 deletions
diff --git a/src/core/machine-id-setup.c b/src/core/machine-id-setup.c index 671003820b..77f047dde8 100644 --- a/src/core/machine-id-setup.c +++ b/src/core/machine-id-setup.c @@ -157,6 +157,37 @@ static int generate(char id[34], const char *root) { return 0; } +static int get_valid_machine_id(int fd, char id[34]) { + char id_to_validate[34]; + + assert(fd >= 0); + assert(id); + + if (loop_read(fd, id_to_validate, 33, false) == 33 && id_to_validate[32] == '\n') { + id_to_validate[32] = 0; + + if (id128_is_valid(id_to_validate)) { + memcpy(id, id_to_validate, 32); + id[32] = '\n'; + id[33] = 0; + return 0; + } + } + + return -EINVAL; +} + +static int write_machine_id(int fd, char id[34]) { + assert(fd >= 0); + assert(id); + lseek(fd, 0, SEEK_SET); + + if (loop_write(fd, id, 33, false) == 33) + return 0; + + return -errno; +} + int machine_id_setup(const char *root) { const char *etc_machine_id, *run_machine_id; _cleanup_close_ int fd = -1; @@ -207,13 +238,8 @@ int machine_id_setup(const char *root) { if (fstat(fd, &st) < 0) return log_error_errno(errno, "fstat() failed: %m"); - if (S_ISREG(st.st_mode)) - if (loop_read(fd, id, 33, false) == 33 && id[32] == '\n') { - id[32] = 0; - - if (id128_is_valid(id)) - return 0; - } + if (S_ISREG(st.st_mode) && get_valid_machine_id(fd, id) == 0) + return 0; /* Hmm, so, the id currently stored is not useful, then let's * generate one */ @@ -223,9 +249,7 @@ int machine_id_setup(const char *root) { return r; if (S_ISREG(st.st_mode) && writable) { - lseek(fd, 0, SEEK_SET); - - if (loop_write(fd, id, 33, false) == 33) + if (write_machine_id(fd, id) == 0) return 0; } |