Function create_hsm

hsmd/hsmd.c:298–310

}

static void create_hsm(int fd)
{
	/*~ ccan/read_write_all has a more convenient return than write() where
	 * we'd have to check the return value == the length we gave: write()
	 * can return short on normal files if we run out of disk space. */
	if (!write_all(fd, &hsm_secret, sizeof(hsm_secret))) {
		/* ccan/noerr contains useful routines like this, which don't
		 * clobber errno, so we can use it in our error report. */
		unlink_noerr("hsm_secret");
		status_failed(STATUS_FAIL_INTERNAL_ERROR,
		              "writing: %s", strerror(errno));
	}
}

/*~ We store our root secret in a "hsm_secret" file (like all of Core Lightning,
 * we run in the user's .lightning directory). */