144 lines
4.2 KiB
C
144 lines
4.2 KiB
C
/* $NetBSD: drvctl.c,v 1.2 2010/09/02 02:17:35 jmcneill Exp $ */
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/*
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* Copyright (c) 2010 Jared D. McNeill <jmcneill@invisible.ca>
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* 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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "drvctl.h"
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static int
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drvctl_list(int fd, const char *name, struct devlistargs *laa)
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{
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size_t children;
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memset(laa, 0, sizeof(*laa));
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strlcpy(laa->l_devname, name, sizeof(laa->l_devname));
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if (ioctl(fd, DRVLISTDEV, laa) == -1)
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return -1;
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children = laa->l_children;
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laa->l_childname = malloc(children * sizeof(laa->l_childname[0]));
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if (laa->l_childname == NULL)
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return -1;
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if (ioctl(fd, DRVLISTDEV, laa) == -1)
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return -1;
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return 0;
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}
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static bool
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drvctl_get_properties(int fd, const char *devnode, prop_dictionary_t *props)
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{
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prop_dictionary_t command_dict;
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prop_dictionary_t args_dict;
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prop_dictionary_t results_dict;
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int8_t perr;
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int error;
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bool rv;
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command_dict = prop_dictionary_create();
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args_dict = prop_dictionary_create();
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prop_dictionary_set_cstring_nocopy(command_dict, "drvctl-command",
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"get-properties");
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prop_dictionary_set_cstring_nocopy(args_dict, "device-name", devnode);
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prop_dictionary_set(command_dict, "drvctl-arguments", args_dict);
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prop_object_release(args_dict);
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error = prop_dictionary_sendrecv_ioctl(command_dict, fd,
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DRVCTLCOMMAND, &results_dict);
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prop_object_release(command_dict);
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if (error)
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return false;
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rv = prop_dictionary_get_int8(results_dict, "drvctl-error", &perr);
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if (rv == false || perr != 0) {
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prop_object_release(results_dict);
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return false;
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}
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if (props) {
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prop_dictionary_t result_data;
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result_data = prop_dictionary_get(results_dict,
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"drvctl-result-data");
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if (result_data)
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*props = prop_dictionary_copy(result_data);
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}
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prop_object_release(results_dict);
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return true;
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}
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static int
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drvctl_search(int fd, const char *curnode, const char *dvname,
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void (*callback)(void *, const char *, const char *, unsigned int),
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void *args)
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{
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struct devlistargs laa;
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unsigned int i;
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uint32_t unit;
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bool rv;
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if (drvctl_list(fd, curnode, &laa) == -1)
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return -1;
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for (i = 0; i < laa.l_children; i++) {
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prop_dictionary_t props = NULL;
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const char *curdvname;
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rv = drvctl_get_properties(fd, laa.l_childname[i], &props);
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if (rv == false || props == NULL)
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continue;
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rv = prop_dictionary_get_cstring_nocopy(props,
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"device-driver", &curdvname);
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if (rv == true && strcmp(curdvname, dvname) == 0) {
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rv = prop_dictionary_get_uint32(props,
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"device-unit", &unit);
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if (rv == true)
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callback(args, curnode,
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laa.l_childname[i], unit);
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}
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prop_object_release(props);
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if (drvctl_search(fd, laa.l_childname[i], dvname,
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callback, args) == -1)
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return -1;
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}
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return 0;
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}
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int
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drvctl_foreach(int fd, const char *dvname,
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void (*callback)(void *, const char *, const char *, unsigned int),
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void *args)
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{
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return drvctl_search(fd, "", dvname, callback, args);
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}
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