text: /*	$NetBSD: ophandlers.c,v 1.6 1997/10/18 08:40:52 lukem Exp $	*/
  
  /*-
   * Copyright (c) 1996 The NetBSD Foundation, Inc.
   * All rights reserved.
   *
   * This code is derived from software contributed to The NetBSD Foundation
   * by Jason R. Thorpe.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *        This product includes software developed by the NetBSD
   *        Foundation, Inc. and its contributors.
   * 4. Neither the name of The NetBSD Foundation nor the names of its
   *    contributors may be used to endorse or promote products derived
   *    from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 
   * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include <sys/types.h>
  #include <sys/ioctl.h>
  #include <err.h>
  #include <errno.h>
  #include <fcntl.h>
  #include <string.h>
  #include <stdio.h>
  #include <string.h>
  #include <unistd.h>
  
  #include <machine/eeprom.h>
  #include <machine/openpromio.h>
  
  #include "defs.h"
  
  extern	char *path_openprom;
  extern	int eval;
  extern	int verbose;
  
  static	char err_str[BUFSIZE];
  
  static	void op_notsupp __P((struct extabent *, struct opiocdesc *, char *));
  
  /*
   * There are several known fields that I either don't know how to
   * deal with or require special treatment.
   */
  static	struct extabent opextab[] = {
  	{ "security-password",		op_notsupp },
  	{ "security-mode",		op_notsupp },
  	{ "oem-logo",			op_notsupp },
  	{ NULL,				op_notsupp },
  };
  
  #define BARF(str1, str2) {						\
  	snprintf(err_str, sizeof err_str, "%s: %s", (str1), (str2));	\
  	++eval;								\
  	return (err_str);						\
  };
  
  char *
  op_handler(keyword, arg)
  	char *keyword, *arg;
  {
  	struct opiocdesc opio;
  	struct extabent *ex;
  	char opio_buf[BUFSIZE];
  	int fd, optnode;
  
  	if ((fd = open(path_openprom, arg ? O_RDWR : O_RDONLY, 0640)) < 0)
  		BARF(path_openprom, strerror(errno));
  
  	/* Check to see if it's a special-case keyword. */
  	for (ex = opextab; ex->ex_keyword != NULL; ++ex)
  		if (strcmp(ex->ex_keyword, keyword) == 0)
  			break;
  
  	if (ioctl(fd, OPIOCGETOPTNODE, (char *)&optnode) < 0)
  		BARF("OPIOCGETOPTNODE", strerror(errno));
  
  	memset(&opio_buf[0], 0, sizeof(opio_buf));
  	memset(&opio, 0, sizeof(opio));
  	opio.op_nodeid = optnode;
  	opio.op_name = keyword;
  	opio.op_namelen = strlen(opio.op_name);
  
  	if (arg) {
  		if (verbose) {
  			printf("old: ");
  
  			opio.op_buf = &opio_buf[0];
  			opio.op_buflen = sizeof(opio_buf);
  			if (ioctl(fd, OPIOCGET, (char *)&opio) < 0)
  				BARF("OPIOCGET", strerror(errno));
  
  			if (opio.op_buflen <= 0) {
  				printf("nothing available for %s\n", keyword);
  				goto out;
  			}
  
  			if (ex->ex_keyword != NULL)
  				(*ex->ex_handler)(ex, &opio, NULL);
  			else
  				printf("%s\n", opio.op_buf);
  		}
   out:
  		if (ex->ex_keyword != NULL)
  			(*ex->ex_handler)(ex, &opio, arg);
  		else {
  			opio.op_buf = arg;
  			opio.op_buflen = strlen(arg);
  		}
  
  		if (ioctl(fd, OPIOCSET, (char *)&opio) < 0)
  			BARF("invalid keyword", keyword);
  
  		if (verbose) {
  			printf("new: ");
  			if (ex->ex_keyword != NULL)
  				(*ex->ex_handler)(ex, &opio, NULL);
  			else
  				printf("%s\n", opio.op_buf);
  		}
  	} else {
  		opio.op_buf = &opio_buf[0];
  		opio.op_buflen = sizeof(opio_buf);
  		if (ioctl(fd, OPIOCGET, (char *)&opio) < 0)
  			BARF("OPIOCGET", strerror(errno));
  
  		if (opio.op_buflen <= 0) {
  			(void)snprintf(err_str, sizeof err_str,
  			    "nothing available for %s", keyword);
  			return (err_str);
  		}
  
  		if (ex->ex_keyword != NULL)
  			(*ex->ex_handler)(ex, &opio, NULL);
  		else
  			printf("%s=%s\n", keyword, opio.op_buf);
  	}
  
  	(void)close(fd);
  	return (NULL);
  }
  
  /* ARGSUSED */
  static void
  op_notsupp(exent, opiop, arg)
  	struct extabent *exent;
  	struct opiocdesc *opiop;
  	char *arg;
  {
  
  	warnx("property `%s' not yet supported", exent->ex_keyword);
  }
  
  /*
   * XXX: This code is quite ugly.  You have been warned.
   * (Really!  This is the only way I could get it to work!)
   */
  void
  op_dump()
  {
  	struct opiocdesc opio1, opio2;
  	struct extabent *ex;
  	char buf1[BUFSIZE], buf2[BUFSIZE], buf3[BUFSIZE], buf4[BUFSIZE];
  	int fd, optnode;
  
  	if ((fd = open(path_openprom, O_RDONLY, 0640)) < 0)
  		err(1, "open: %s", path_openprom);
  
  	if (ioctl(fd, OPIOCGETOPTNODE, (char *)&optnode) < 0)
  		err(1, "OPIOCGETOPTNODE");
  
  	memset(&opio1, 0, sizeof(opio1));
  
  	/* This will grab the first property name from OPIOCNEXTPROP. */
  	memset(buf1, 0, sizeof(buf1));
  	memset(buf2, 0, sizeof(buf2));
  
  	opio1.op_nodeid = opio2.op_nodeid = optnode;
  
  	opio1.op_name = buf1;
  	opio1.op_buf = buf2;
  
  	opio2.op_name = buf3;
  	opio2.op_buf = buf4;
  
  	/*
  	 * For reference: opio1 is for obtaining the name.  Pass the
  	 * name of the last property read in op_name, and the next one
  	 * will be returned in op_buf.  To get the first name, pass
  	 * an empty string.  There are no more properties when an
  	 * empty string is returned.
  	 *
  	 * opio2 is for obtaining the value associated with that name.
  	 * For some crazy reason, it seems as if we need to do all
  	 * of that gratuitious zapping and copying.  *sigh*
  	 */
  	for (;;) {
  		opio1.op_namelen = strlen(opio1.op_name);
  		opio1.op_buflen = sizeof(buf2);
  
  		if (ioctl(fd, OPIOCNEXTPROP, (char *)&opio1) < 0)
  			err(1, "ioctl: OPIOCNEXTPROP");
  
  		/*
  		 * The name of the property we wish to get the
  		 * value for has been stored in the value field
  		 * of opio1.  If the length of the name is 0, there
  		 * are no more properties left.
  		 */
  		strcpy(opio2.op_name, opio1.op_buf);	/* XXX strcpy is safe */
  		opio2.op_namelen = strlen(opio2.op_name);
  
  		if (opio2.op_namelen == 0) {
  			(void)close(fd);
  			return;
  		}
  
  		memset(opio2.op_buf, 0, sizeof(buf4));
  		opio2.op_buflen = sizeof(buf4);
  
  		if (ioctl(fd, OPIOCGET, (char *)&opio2) < 0)
  			err(1, "ioctl: OPIOCGET");
  
  		for (ex = opextab; ex->ex_keyword != NULL; ++ex)
  			if (strcmp(ex->ex_keyword, opio2.op_name) == 0)
  				break;
  
  		if (ex->ex_keyword != NULL)
  			(*ex->ex_handler)(ex, &opio2, NULL);
  		else
  			printf("%s=%s\n", opio2.op_name, opio2.op_buf);
  
  		/*
  		 * Place the name of the last read value back into
  		 * opio1 so that we may obtain the next name.
  		 */
  		memset(opio1.op_name, 0, sizeof(buf1));
  		memset(opio1.op_buf, 0, sizeof(buf2));
  		strcpy(opio1.op_name, opio2.op_name);	/* XXX strcpy is safe */
  	}
  	/* NOTREACHED */
  }
  