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When opening a device, loop over the alternate devices list in the
worker process instead of the helper process. It is simpler this way
and allows the worker to properly log which device is being used.

/*	$OpenBSD: utils.h,v 1.5 2020/01/23 05:40:09 ratchov Exp $	*/
/*
 * Copyright (c) 2003-2012 Alexandre Ratchov <alex@caoua.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef UTILS_H
#define UTILS_H

#include <stddef.h>

struct name {
	struct name *next;
	char str[];
};

void log_puts(char *);
void log_putx(unsigned long);
void log_putu(unsigned long);
void log_puti(long);
void panic(void);
void log_flush(void);

void *xmalloc(size_t);
char *xstrdup(char *);
void xfree(void *);

void namelist_add(struct name **, char *);
void namelist_clear(struct name **);
char *namelist_byindex(struct name **, unsigned int);

/*
 * Log levels:
 *
 * 0 - fatal errors: bugs, asserts, internal errors.
 * 1 - warnings: bugs in clients, failed allocations, non-fatal errors.
 * 2 - misc information (hardware parameters, incoming clients)
 * 3 - structural changes (eg. new streams, new parameters ...)
 * 4 - data blocks and messages
 */
extern unsigned int log_level;
extern unsigned int log_sync;

#endif