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Handle all streams the same way because there's no actual
difference between audio files and client connections. Clean up
the way command line options are handled and clarify this in the
manual page: stream parameters (-Ccehjmrtvx) must precede stream
definitions (-ios) and per-device parameters (-abz) and stream
definitions (-ios) must precede device definitions (-f). Since
there's no ``server'' and ``non-server'' modes anymore, make the
-l option just detach the process.

ok and help from jakemsr and jmc

/*	$OpenBSD: opt.c,v 1.10 2010/07/06 01:12:45 ratchov Exp $	*/
/*
 * Copyright (c) 2008 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.
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "dev.h"
#include "conf.h"
#include "opt.h"
#ifdef DEBUG
#include "dbg.h"
#endif

struct optlist opt_list = SLIST_HEAD_INITIALIZER(&opt_list);

void
opt_new(char *name, struct dev *d, struct aparams *wpar, struct aparams *rpar,
    int maxweight, int mmc, int join, unsigned mode)
{
	struct opt *o;
	unsigned len;
	char c;

	for (len = 0; name[len] != '\0'; len++) {
		if (len == OPT_NAMEMAX) {
			fprintf(stderr, "%s: name too long\n", name);
			exit(1);
		}
		c = name[len];
		if (c < 'a' && c > 'z' &&
		    c < 'A' && c > 'Z' &&
		    c < '0' && c > '9' && 
		    c != '_') {
			fprintf(stderr, "%s: '%c' not allowed\n", name, c);
			exit(1);
		}
	}
	SLIST_FOREACH(o, &opt_list, entry) {
		if (strcmp(name, o->name) == 0) {
			fprintf(stderr, "%s: already defined\n", name);
			exit(1);
		}
	}
	o = malloc(sizeof(struct opt));
	if (o == NULL) {
		perror("opt_new: malloc");
		exit(1);
	}
	memcpy(o->name, name, len + 1);
	if (mode & MODE_RECMASK)
		o->wpar = (mode & MODE_MON) ? *rpar : *wpar;
	if (mode & MODE_PLAY)
		o->rpar = *rpar;
	o->maxweight = maxweight;
	o->mmc = mmc;
	o->join = join;
	o->mode = mode;
	o->dev = d;
#ifdef DEBUG
	if (debug_level >= 2) {
		dbg_puts(o->name);
		dbg_puts("@");
		dbg_puts(o->dev->path);
		dbg_puts(":");
		if (mode & MODE_REC) {
			dbg_puts(" rec=");
			dbg_putu(o->wpar.cmin);
			dbg_puts(":");
			dbg_putu(o->wpar.cmax);
		}
		if (mode & MODE_PLAY) {
			dbg_puts(" play=");
			dbg_putu(o->rpar.cmin);
			dbg_puts(":");
			dbg_putu(o->rpar.cmax);
			dbg_puts(" vol=");
			dbg_putu(o->maxweight);
		}
		if (mode & MODE_MON) {
			dbg_puts(" mon=");
			dbg_putu(o->wpar.cmin);
			dbg_puts(":");
			dbg_putu(o->wpar.cmax);
		}
		if (o->mmc)
			dbg_puts(" mmc");
		dbg_puts("\n");
	}
#endif
	SLIST_INSERT_HEAD(&opt_list, o, entry);
}

struct opt *
opt_byname(char *name)
{
	struct opt *o;

	SLIST_FOREACH(o, &opt_list, entry) {
		if (strcmp(name, o->name) == 0) {
#ifdef DEBUG
			if (debug_level >= 3) {
				dbg_puts(o->name);
				dbg_puts(": option found\n");
			}
#endif
			return o;
		}
	}
#ifdef DEBUG
	if (debug_level >= 3) {
		dbg_puts(name);
		dbg_puts(": option not found\n");
	}
#endif
	return NULL;
}