prephandlers.c revision 1.1 1 /* $NetBSD: prephandlers.c,v 1.1 2007/03/01 16:49:48 garbled Exp $ */
2
3 /*-
4 * Copyright (c) 2006 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Tim Rightnour.
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 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the NetBSD
21 * Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 * contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39 #include <sys/types.h>
40 #include <sys/ioctl.h>
41 #include <err.h>
42 #include <errno.h>
43 #include <fcntl.h>
44 #include <string.h>
45 #include <stdio.h>
46 #include <string.h>
47 #include <unistd.h>
48
49 #include <machine/nvram.h>
50
51 #include "defs.h"
52
53 extern char *path_prepnvram;
54 extern int eval;
55 extern int verbose;
56
57 static char err_str[BUFSIZE];
58
59 static void prep_notsupp(struct extabent *, struct pnviocdesc *, char *);
60
61 /*
62 * XXX
63 * This file needs a recalc checksum routine, and a routine to call a
64 * write back to nvram. The prep NVRAM is stored in RAM after boot, to
65 * prevent horrific bitbanging on the NVRAM chip, we read and write into RAM
66 * until a save operation is called. At that time we write the ram-based
67 * NVRAM back to the physical NVRAM. This is a fairly expensive operation.
68 */
69
70
71 /*
72 * There are several known fields that I either don't know how to
73 * deal with or require special treatment.
74 */
75 static struct extabent prepextab[] = {
76 {NULL, prep_notsupp},
77 };
78 #define BARF(str1, str2) { \
79 snprintf(err_str, sizeof err_str, "%s: %s", (str1), (str2)); \
80 ++eval; \
81 return (err_str); \
82 };
83
84 void
85 prep_action(char *keyword, char *arg)
86 {
87 char *cp;
88
89 if ((cp = prep_handler(keyword, arg)) != NULL)
90 warnx("%s", cp);
91 return;
92 }
93
94 char *
95 prep_handler(char *keyword, char *arg)
96 {
97 struct pnviocdesc nvio;
98 struct extabent *ex;
99 char nvio_buf[BUFSIZE];
100 int fd;
101
102 if ((fd = open(path_prepnvram, arg ? O_RDWR : O_RDONLY, 0640)) < 0)
103 BARF(path_prepnvram, strerror(errno));
104
105 /* Check to see if it's a special-case keyword. */
106 for (ex = prepextab; ex->ex_keyword != NULL; ++ex)
107 if (strcmp(ex->ex_keyword, keyword) == 0)
108 break;
109
110 memset(&nvio_buf[0], 0, sizeof(nvio_buf));
111 memset(&nvio, 0, sizeof(nvio));
112 nvio.pnv_name = keyword;
113 nvio.pnv_namelen = strlen(nvio.pnv_name);
114
115 if (arg) {
116 if (verbose) {
117 printf("old: ");
118
119 nvio.pnv_buf = &nvio_buf[0];
120 nvio.pnv_buflen = sizeof(nvio_buf);
121 if (ioctl(fd, PNVIOCGET, (char *) &nvio) < 0)
122 BARF("PNVIOCGET", strerror(errno));
123
124 if (nvio.pnv_buflen <= 0) {
125 printf("nothing available for %s\n", keyword);
126 goto out;
127 }
128 if (ex->ex_keyword != NULL)
129 (*ex->ex_handler) (ex, &nvio, NULL);
130 else
131 printf("%s\n", nvio.pnv_buf);
132 }
133 out:
134 if (ex->ex_keyword != NULL)
135 (*ex->ex_handler) (ex, &nvio, arg);
136 else {
137 nvio.pnv_buf = arg;
138 nvio.pnv_buflen = strlen(arg);
139 }
140
141 if (ioctl(fd, PNVIOCSET, (char *) &nvio) < 0)
142 BARF("invalid keyword", keyword);
143
144 if (verbose) {
145 printf("new: ");
146 if (ex->ex_keyword != NULL)
147 (*ex->ex_handler) (ex, &nvio, NULL);
148 else
149 printf("%s\n", nvio.pnv_buf);
150 }
151 } else {
152 nvio.pnv_buf = &nvio_buf[0];
153 nvio.pnv_buflen = sizeof(nvio_buf);
154 if (ioctl(fd, PNVIOCGET, (char *) &nvio) < 0)
155 BARF("PNVIOCGET", strerror(errno));
156
157 if (nvio.pnv_buflen <= 0) {
158 (void) snprintf(err_str, sizeof err_str,
159 "nothing available for %s", keyword);
160 return (err_str);
161 }
162 if (ex->ex_keyword != NULL)
163 (*ex->ex_handler) (ex, &nvio, NULL);
164 else
165 printf("%s=%s\n", keyword, nvio.pnv_buf);
166 }
167
168 (void) close(fd);
169 return (NULL);
170 }
171 /* ARGSUSED */
172 static void
173 prep_notsupp(struct extabent * exent, struct pnviocdesc * nviop, char *arg)
174 {
175
176 warnx("property `%s' not yet supported", exent->ex_keyword);
177 }
178 /*
179 * Derrived from op_dump(). This should dump the contents of the PReP
180 * NVRAM chip.
181 */
182
183 void
184 prep_dump()
185 {
186 struct pnviocdesc nvio1, nvio2;
187 char buf1[BUFSIZE], buf2[BUFSIZE], buf3[BUFSIZE], buf4[BUFSIZE];
188 int fd, optnode, nrofvars;
189
190 if ((fd = open(path_prepnvram, O_RDONLY, 0640)) < 0)
191 err(1, "open: %s", path_prepnvram);
192
193 memset(&nvio1, 0, sizeof(nvio1));
194
195 if (ioctl(fd, PNVIOCGETNUMGE, (char *) &nvio1) < 0)
196 err(1, "PNVIOCGETNUMGE");
197
198 nrofvars = nvio1.pnv_num;
199 if (nrofvars < 1)
200 err(1, "PNVIOCGETNUMGE");
201
202 memset(&nvio1, 0, sizeof(nvio1));
203 memset(buf1, 0, sizeof(buf1));
204 memset(buf2, 0, sizeof(buf2));
205 memset(buf3, 0, sizeof(buf3));
206 memset(buf4, 0, sizeof(buf4));
207 nvio1.pnv_name = NULL;
208 nvio1.pnv_buf = buf2;
209 nvio2.pnv_name = buf3;
210 nvio2.pnv_buf = buf4;
211 for (optnode = 0; optnode < nrofvars; optnode++) {
212 nvio1.pnv_buflen = sizeof(buf2);
213
214 if (ioctl(fd, PNVIOCGETNEXTNAME, (char *) &nvio1) < 0)
215 err(1, "PNVIOCGETNEXTNAME");
216
217 if (optnode == 0)
218 nvio1.pnv_name = buf1;
219
220 /* the property name is now stored in nvio1.pnv_buf */
221 strcpy(nvio2.pnv_name, nvio1.pnv_buf); /* safe */
222 nvio2.pnv_namelen = strlen(nvio2.pnv_name);
223
224 if (nvio2.pnv_namelen == 0) {
225 (void) close(fd);
226 return;
227 }
228 memset(nvio2.pnv_buf, 0, sizeof(buf4));
229 nvio2.pnv_buflen = sizeof(buf4);
230
231 if (ioctl(fd, PNVIOCGET, (char *) &nvio2) < 0)
232 err(1, "PNVIOCGET");
233
234 printf("%s=%s\n", nvio1.pnv_buf, nvio2.pnv_buf);
235
236 /* now clean out the buffers for the next loop */
237
238 memset(nvio1.pnv_name, 0, sizeof(buf1));
239 memset(nvio1.pnv_buf, 0, sizeof(buf2));
240 strcpy(nvio1.pnv_name, nvio2.pnv_name); /* safe */
241 nvio1.pnv_namelen = strlen(nvio1.pnv_name);
242 }
243 close(fd);
244 }
245