Function maybe_add_e_option

options.c:3021–3065

}

int maybe_add_e_option(char *buf, int buf_len)
{
	int x = 0;

	/* We don't really know the actual protocol_version at this point,
	 * but checking the pre-negotiated value allows the user to use a
	 * --protocol=29 override to avoid the use of this -eFLAGS opt. */
	if (protocol_version >= 30 && buf_len > 0) {
		/* We make use of the -e option to let the server know about
		 * any pre-release protocol version && some behavior flags. */
		buf[x++] = 'e';

#if SUBPROTOCOL_VERSION != 0
		if (protocol_version == PROTOCOL_VERSION)
			x += snprintf(buf + x, buf_len - x, "%d.%d", PROTOCOL_VERSION, SUBPROTOCOL_VERSION);
		else
#endif
			buf[x++] = '.';
		if (allow_inc_recurse)
			buf[x++] = 'i';
#ifdef CAN_SET_SYMLINK_TIMES
		buf[x++] = 'L'; /* symlink time-setting support */
#endif
#ifdef ICONV_OPTION
		buf[x++] = 's'; /* symlink iconv translation support */
#endif
		buf[x++] = 'f'; /* flist I/O-error safety support */
		buf[x++] = 'x'; /* xattr hardlink optimization not desired */
		buf[x++] = 'C'; /* support checksum seed order fix */
		buf[x++] = 'I'; /* support inplace_partial behavior */
		buf[x++] = 'v'; /* use varint for flist & compat flags; negotiate checksum */
		buf[x++] = 'u'; /* include name of uid 0 & gid 0 in the id map */

		/* NOTE: Avoid using 'V' -- it was represented with the high bit of a write_byte() that became a write_varint(). */
	}

	if (x >= buf_len) { /* Not possible... */
		rprintf(FERROR, "overflow in add_e_flags().\n");
		exit_cleanup(RERR_MALLOC);
	}

	buf[x] = '\0';

	return x;
}

/* If str points to a valid hostspec, return allocated memory containing the
 * [USER@]HOST part of the string, and set the path_start_ptr to the part of