1 /* $NetBSD: ophandlers.c,v 1.13 2013/07/02 11:59:46 joerg Exp $ */
2
3 /*-
4 * Copyright (c) 1996 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/types.h>
33 #include <sys/ioctl.h>
34 #include <err.h>
35 #include <errno.h>
36 #include <fcntl.h>
37 #include <stdio.h>
38 #include <string.h>
39 #include <unistd.h>
40
41 #include <machine/eeprom.h>
42 #include <machine/openpromio.h>
43
44 #include "defs.h"
45
46 extern char *path_openprom;
47 extern int eval;
48 extern int verbose;
49
50 static char err_str[BUFSIZE];
51
52 static void op_notsupp (const struct extabent *, struct opiocdesc *, char *);
53
54 /*
55 * There are several known fields that I either don't know how to
56 * deal with or require special treatment.
57 */
58 static const struct extabent opextab[] = {
59 { "security-password", op_notsupp },
60 { "security-mode", op_notsupp },
61 { "oem-logo", op_notsupp },
62 { NULL, op_notsupp },
63 };
64
65 #define BARF(str1, str2) { \
66 snprintf(err_str, sizeof err_str, "%s: %s", (str1), (str2)); \
67 ++eval; \
68 return (err_str); \
69 };
70
71 void
op_action(char * keyword,char * arg)72 op_action(char *keyword, char *arg)
73 {
74 char *cp;
75
76 if ((cp = op_handler(keyword, arg)) != NULL)
77 warnx("%s", cp);
78 return;
79 }
80
81 int
check_for_openprom(void)82 check_for_openprom(void)
83 {
84 int fd, rv, optnode;
85
86 /* if we can't open it, obviously we can't use it. */
87 if ((fd = open(path_openprom, O_RDONLY)) < 0)
88 return (0);
89
90 /* check for the presence of OpenFirmware with OPIOCGETOPTNODE */
91 rv = ioctl(fd, OPIOCGETOPTNODE, (char *)&optnode);
92 close (fd);
93
94 return (rv == 0);
95 }
96
97 char *
op_handler(char * keyword,char * arg)98 op_handler(char *keyword, char *arg)
99 {
100 struct opiocdesc opio;
101 const struct extabent *ex;
102 char opio_buf[BUFSIZE];
103 int fd, optnode;
104
105 if ((fd = open(path_openprom, arg ? O_RDWR : O_RDONLY, 0640)) < 0)
106 BARF(path_openprom, strerror(errno));
107
108 /* Check to see if it's a special-case keyword. */
109 for (ex = opextab; ex->ex_keyword != NULL; ++ex)
110 if (strcmp(ex->ex_keyword, keyword) == 0)
111 break;
112
113 if (ioctl(fd, OPIOCGETOPTNODE, (char *)&optnode) < 0) {
114 (void)close(fd);
115 BARF("OPIOCGETOPTNODE", strerror(errno));
116 }
117
118 memset(&opio_buf[0], 0, sizeof(opio_buf));
119 memset(&opio, 0, sizeof(opio));
120 opio.op_nodeid = optnode;
121 opio.op_name = keyword;
122 opio.op_namelen = strlen(opio.op_name);
123
124 if (arg) {
125 if (verbose) {
126 printf("old: ");
127
128 opio.op_buf = &opio_buf[0];
129 opio.op_buflen = sizeof(opio_buf);
130 if (ioctl(fd, OPIOCGET, (char *)&opio) < 0) {
131 (void)close(fd);
132 BARF("OPIOCGET", strerror(errno));
133 }
134
135 if (opio.op_buflen <= 0) {
136 printf("nothing available for %s\n", keyword);
137 goto out;
138 }
139
140 if (ex->ex_keyword != NULL)
141 (*ex->ex_handler)(ex, &opio, NULL);
142 else
143 printf("%s\n", opio.op_buf);
144 }
145 out:
146 if (ex->ex_keyword != NULL)
147 (*ex->ex_handler)(ex, &opio, arg);
148 else {
149 opio.op_buf = arg;
150 opio.op_buflen = strlen(arg);
151 }
152
153 if (ioctl(fd, OPIOCSET, (char *)&opio) < 0) {
154 (void)close(fd);
155 BARF("invalid keyword", keyword);
156 }
157
158 if (verbose) {
159 printf("new: ");
160 if (ex->ex_keyword != NULL)
161 (*ex->ex_handler)(ex, &opio, NULL);
162 else
163 printf("%s\n", opio.op_buf);
164 }
165 } else {
166 opio.op_buf = &opio_buf[0];
167 opio.op_buflen = sizeof(opio_buf);
168 if (ioctl(fd, OPIOCGET, (char *)&opio) < 0) {
169 (void)close(fd);
170 BARF("OPIOCGET", strerror(errno));
171 }
172
173 if (opio.op_buflen <= 0) {
174 (void)snprintf(err_str, sizeof err_str,
175 "nothing available for %s", keyword);
176 return (err_str);
177 }
178
179 if (ex->ex_keyword != NULL)
180 (*ex->ex_handler)(ex, &opio, NULL);
181 else
182 printf("%s=%s\n", keyword, opio.op_buf);
183 }
184
185 (void)close(fd);
186 return (NULL);
187 }
188
189 /* ARGSUSED */
190 static void
op_notsupp(const struct extabent * exent,struct opiocdesc * opiop,char * arg)191 op_notsupp(const struct extabent *exent, struct opiocdesc *opiop, char *arg)
192 {
193
194 warnx("property `%s' not yet supported", exent->ex_keyword);
195 }
196
197 /*
198 * XXX: This code is quite ugly. You have been warned.
199 * (Really! This is the only way I could get it to work!)
200 */
201 void
op_dump(void)202 op_dump(void)
203 {
204 struct opiocdesc opio1, opio2;
205 const struct extabent *ex;
206 char buf1[BUFSIZE], buf2[BUFSIZE], buf3[BUFSIZE], buf4[BUFSIZE];
207 int fd, optnode;
208
209 if ((fd = open(path_openprom, O_RDONLY, 0640)) < 0)
210 err(1, "open: %s", path_openprom);
211
212 if (ioctl(fd, OPIOCGETOPTNODE, (char *)&optnode) < 0)
213 err(1, "OPIOCGETOPTNODE");
214
215 memset(&opio1, 0, sizeof(opio1));
216
217 /* This will grab the first property name from OPIOCNEXTPROP. */
218 memset(buf1, 0, sizeof(buf1));
219 memset(buf2, 0, sizeof(buf2));
220
221 opio1.op_nodeid = opio2.op_nodeid = optnode;
222
223 opio1.op_name = buf1;
224 opio1.op_buf = buf2;
225
226 opio2.op_name = buf3;
227 opio2.op_buf = buf4;
228
229 /*
230 * For reference: opio1 is for obtaining the name. Pass the
231 * name of the last property read in op_name, and the next one
232 * will be returned in op_buf. To get the first name, pass
233 * an empty string. There are no more properties when an
234 * empty string is returned.
235 *
236 * opio2 is for obtaining the value associated with that name.
237 * For some crazy reason, it seems as if we need to do all
238 * of that gratuitious zapping and copying. *sigh*
239 */
240 for (;;) {
241 opio1.op_namelen = strlen(opio1.op_name);
242 opio1.op_buflen = sizeof(buf2);
243
244 if (ioctl(fd, OPIOCNEXTPROP, (char *)&opio1) < 0)
245 err(1, "ioctl: OPIOCNEXTPROP");
246
247 /*
248 * The name of the property we wish to get the
249 * value for has been stored in the value field
250 * of opio1. If the length of the name is 0, there
251 * are no more properties left.
252 */
253 strcpy(opio2.op_name, opio1.op_buf); /* XXX strcpy is safe */
254 opio2.op_namelen = strlen(opio2.op_name);
255
256 if (opio2.op_namelen == 0) {
257 (void)close(fd);
258 return;
259 }
260
261 memset(opio2.op_buf, 0, sizeof(buf4));
262 opio2.op_buflen = sizeof(buf4);
263
264 if (ioctl(fd, OPIOCGET, (char *)&opio2) < 0)
265 err(1, "ioctl: OPIOCGET");
266
267 for (ex = opextab; ex->ex_keyword != NULL; ++ex)
268 if (strcmp(ex->ex_keyword, opio2.op_name) == 0)
269 break;
270
271 if (ex->ex_keyword != NULL)
272 (*ex->ex_handler)(ex, &opio2, NULL);
273 else
274 printf("%s=%s\n", opio2.op_name, opio2.op_buf);
275
276 /*
277 * Place the name of the last read value back into
278 * opio1 so that we may obtain the next name.
279 */
280 memset(opio1.op_name, 0, sizeof(buf1));
281 memset(opio1.op_buf, 0, sizeof(buf2));
282 strcpy(opio1.op_name, opio2.op_name); /* XXX strcpy is safe */
283 }
284 /* NOTREACHED */
285 }
286