Function posix_log_path_open

src/daemon/service.c:443–484

}

static bool posix_log_path_open(const char *log_path, posix_log_path_t *path) {
    size_t length = 0;
    if (!path || !bounded_length(log_path, sizeof(path->storage), &length) || length == 0) {
        return false;
    }
    memset(path, 0, sizeof(*path));
    path->dir_fd = -1;
    memcpy(path->storage, log_path, length + 1);
    char *slash = strrchr(path->storage, '/');
    const char *parent = ".";
    if (slash) {
        path->base = slash + 1;
        if (slash == path->storage) {
            parent = "/";
        } else {
            *slash = '\0';
            parent = path->storage;
        }
    } else {
        path->base = path->storage;
    }
    size_t base_length = strlen(path->base);
    if (base_length == 0 || base_length > NAME_MAX - 5 || strcmp(path->base, ".") == 0 ||
        strcmp(path->base, "..") == 0) {
        return false;
    }
    int rotated_written = snprintf(path->rotated, sizeof(path->rotated), "%s.1", path->base);
    int lock_written = snprintf(path->lock, sizeof(path->lock), "%s.lock", path->base);
    if (rotated_written < 0 || (size_t)rotated_written >= sizeof(path->rotated) ||
        lock_written < 0 || (size_t)lock_written >= sizeof(path->lock)) {
        return false;
    }
    path->dir_fd = open(parent, O_RDONLY | O_DIRECTORY | O_CLOEXEC | O_NOFOLLOW);
    struct stat parent_status;
    if (path->dir_fd < 0 || !fd_cloexec(path->dir_fd) || fstat(path->dir_fd, &parent_status) != 0 ||
        !S_ISDIR(parent_status.st_mode) || parent_status.st_uid != geteuid() ||
        (parent_status.st_mode & 0022) != 0) {
        posix_log_path_close(path);
        return false;
    }
    return true;
}

static int posix_lock_file_open(const posix_log_path_t *path, bool *created_out) {
    int flags = O_RDWR | O_CLOEXEC | O_NOFOLLOW | O_NONBLOCK;