181 lines
4.2 KiB
C
181 lines
4.2 KiB
C
/* $NetBSD: dev.c,v 1.4 1994/10/30 21:48:23 cgd Exp $ */
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/*-
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)dev.c 8.1 (Berkeley) 6/11/93
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*/
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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <sys/reboot.h>
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#include "stand.h"
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int
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nodev(void)
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{
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return (ENXIO);
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}
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void
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nullsys(void)
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{
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}
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/* ARGSUSED */
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int
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noioctl(struct open_file *f __unused, u_long cmd __unused, void *data __unused)
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{
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return (EINVAL);
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}
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char *
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devformat(struct devdesc *d)
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{
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static char name[DEV_DEVLEN];
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if (d->d_dev->dv_fmtdev != NULL)
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return (d->d_dev->dv_fmtdev(d));
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snprintf(name, sizeof(name), "%s%d:", d->d_dev->dv_name, d->d_unit);
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return (name);
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}
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/* NB: devspec points to the remainder of the device name after dv_name */
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static int
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default_parsedev(struct devdesc **dev, const char *devspec,
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const char **path)
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{
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struct devdesc *idev;
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int unit, err;
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char *cp;
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idev = malloc(sizeof(struct devdesc));
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if (idev == NULL)
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return (ENOMEM);
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unit = 0;
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cp = (char *)devspec; /* strtol interface, alas */
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if (*devspec != '\0' && *devspec != ':') {
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errno = 0;
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unit = strtol(devspec, &cp, 0);
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if (errno != 0 || cp == devspec) {
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err = EUNIT;
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goto fail;
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}
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}
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if (*cp != '\0' && *cp != ':') {
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err = EINVAL;
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goto fail;
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}
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idev->d_unit = unit;
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if (path != NULL)
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*path = (*cp == 0) ? cp : cp + 1;
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*dev = idev;
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return (0);
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fail:
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free(idev);
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return (err);
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}
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/* NB: devspec points to the whole device spec, and possible trailing path */
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int
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devparse(struct devdesc **dev, const char *devspec, const char **path)
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{
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struct devdesc *idev;
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struct devsw *dv;
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int i, err;
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const char *np;
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/* minimum length check */
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if (strlen(devspec) < 2)
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return (EINVAL);
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/* look for a device that matches */
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for (i = 0; devsw[i] != NULL; i++) {
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dv = devsw[i];
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if (dv->dv_match != NULL) {
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if (dv->dv_match(dv, devspec) != 0)
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break;
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} else {
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if (!strncmp(devspec, dv->dv_name, strlen(dv->dv_name)))
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break;
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}
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}
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if (devsw[i] == NULL)
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return (ENOENT);
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idev = NULL;
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err = 0;
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if (dv->dv_parsedev) {
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err = dv->dv_parsedev(&idev, devspec, path);
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} else {
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np = devspec + strlen(dv->dv_name);
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err = default_parsedev(&idev, np, path);
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}
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if (err != 0)
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return (err);
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idev->d_dev = dv;
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if (dev != NULL)
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*dev = idev;
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else
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free(idev);
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return (0);
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}
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int
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devinit(void)
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{
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int err = 0;
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/*
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* March through the device switch probing for things.
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*/
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for (int i = 0; devsw[i] != NULL; i++) {
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if (devsw[i]->dv_init != NULL) {
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if ((devsw[i]->dv_init)() != 0) {
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err++;
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}
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}
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}
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return (err);
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}
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void
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dev_cleanup(void)
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{
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int i;
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/* Call cleanup routines */
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for (i = 0; devsw[i] != NULL; ++i)
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if (devsw[i]->dv_cleanup != NULL)
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(devsw[i]->dv_cleanup)();
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}
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