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
Indexes created Fri Sep 26 20:09:58 GMT 2025