1 /* $NetBSD: mkdevsw.c,v 1.2 2005/07/30 06:40:30 yamt Exp $ */ 2 3 /* 4 * Copyright (c) 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by MAEKAWA Masahide (gehenna@NetBSD.org). 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 #if HAVE_NBTOOL_CONFIG_H 40 #include "nbtool_config.h" 41 #endif 42 43 #include <stdio.h> 44 #include <string.h> 45 #include <errno.h> 46 47 #include "defs.h" 48 49 static int emitconv(FILE *); 50 static int emitdev(FILE *); 51 static int emitdevm(FILE *); 52 static int emitheader(FILE *); 53 54 int 55 mkdevsw(void) 56 { 57 FILE *fp; 58 59 if ((fp = fopen("devsw.c.tmp", "w")) == NULL) { 60 (void)fprintf(stderr, "config: cannot write devsw.c: %s\n", 61 strerror(errno)); 62 return (1); 63 } 64 65 if (emitheader(fp) || emitdevm(fp) || emitconv(fp) || emitdev(fp)) { 66 (void)fprintf(stderr, "config: error writing devsw.c: %s\n", 67 strerror(errno)); 68 (void)fclose(fp); 69 return (1); 70 } 71 72 (void)fclose(fp); 73 74 if (moveifchanged("devsw.c.tmp", "devsw.c") != 0) { 75 (void)fprintf(stderr, "config: error renaming devsw.c: %s\n", 76 strerror(errno)); 77 return (1); 78 } 79 80 return (0); 81 } 82 83 static int 84 emitheader(FILE *fp) 85 { 86 if (fprintf(fp, "/*\n * MACHINE GENERATED: DO NOT EDIT\n *\n" 87 " * devsw.c, from \"%s\"\n */\n\n", conffile) < 0) { 88 return (1); 89 } 90 91 if (fputs("#include <sys/param.h>\n" 92 "#include <sys/conf.h>\n" 93 "\n#define\tDEVSW_ARRAY_SIZE(x)\t" 94 "(sizeof((x))/sizeof((x)[0]))\n", fp) < 0) { 95 return (1); 96 } 97 98 return (0); 99 } 100 101 /* 102 * Emit device switch table for character/block device. 103 */ 104 static int 105 emitdevm(FILE *fp) 106 { 107 struct devm *dm; 108 char mstr[16]; 109 int i; 110 111 if (fputs("\n/* device switch table for block device */\n", fp) < 0) 112 return (1); 113 114 for (i = 0 ; i <= maxbdevm ; i++) { 115 (void)snprintf(mstr, sizeof(mstr), "%d", i); 116 if ((dm = ht_lookup(bdevmtab, intern(mstr))) == NULL) 117 continue; 118 119 if (fprintf(fp, "extern const struct bdevsw %s_bdevsw;\n", 120 dm->dm_name) < 0) 121 return (1); 122 } 123 124 if (fputs("\nconst struct bdevsw *bdevsw0[] = {\n", fp) < 0) 125 return (1); 126 127 for (i = 0 ; i <= maxbdevm ; i++) { 128 (void)snprintf(mstr, sizeof(mstr), "%d", i); 129 if ((dm = ht_lookup(bdevmtab, intern(mstr))) == NULL) { 130 if (fprintf(fp, "\tNULL,\n") < 0) 131 return (1); 132 } else { 133 if (fprintf(fp, "\t&%s_bdevsw,\n", dm->dm_name) < 0) 134 return (1); 135 } 136 } 137 138 if (fputs("};\n\nconst struct bdevsw **bdevsw = bdevsw0;\n", fp) < 0) 139 return (1); 140 141 if (fputs("const int sys_bdevsws = DEVSW_ARRAY_SIZE(bdevsw0);\n" 142 "int max_bdevsws = DEVSW_ARRAY_SIZE(bdevsw0);\n", fp) < 0) 143 return (1); 144 145 if (fputs("\n/* device switch table for character device */\n", fp) < 0) 146 return (1); 147 148 for (i = 0 ; i <= maxcdevm ; i++) { 149 (void)snprintf(mstr, sizeof(mstr), "%d", i); 150 if ((dm = ht_lookup(cdevmtab, intern(mstr))) == NULL) 151 continue; 152 153 if (fprintf(fp, "extern const struct cdevsw %s_cdevsw;\n", 154 dm->dm_name) < 0) 155 return (1); 156 } 157 158 if (fputs("\nconst struct cdevsw *cdevsw0[] = {\n", fp) < 0) 159 return (1); 160 161 for (i = 0 ; i <= maxcdevm ; i++) { 162 (void)snprintf(mstr, sizeof(mstr), "%d", i); 163 if ((dm = ht_lookup(cdevmtab, intern(mstr))) == NULL) { 164 if (fprintf(fp, "\tNULL,\n") < 0) 165 return (1); 166 } else { 167 if (fprintf(fp, "\t&%s_cdevsw,\n", dm->dm_name) < 0) 168 return (1); 169 } 170 } 171 172 if (fputs("};\n\nconst struct cdevsw **cdevsw = cdevsw0;\n", fp) < 0) 173 return (1); 174 175 if (fputs("const int sys_cdevsws = DEVSW_ARRAY_SIZE(cdevsw0);\n" 176 "int max_cdevsws = DEVSW_ARRAY_SIZE(cdevsw0);\n", fp) < 0) 177 return (1); 178 179 return (0); 180 } 181 182 /* 183 * Emit device major conversion table. 184 */ 185 static int 186 emitconv(FILE *fp) 187 { 188 struct devm *dm; 189 190 if (fputs("\n/* device conversion table */\n" 191 "struct devsw_conv devsw_conv0[] = {\n", fp) < 0) 192 return (-1); 193 TAILQ_FOREACH(dm, &alldevms, dm_next) { 194 if (fprintf(fp, "\t{ \"%s\", %d, %d },\n", dm->dm_name, 195 dm->dm_bmajor, dm->dm_cmajor) < 0) 196 return (1); 197 } 198 if (fputs("};\n\n" 199 "struct devsw_conv *devsw_conv = devsw_conv0;\n" 200 "int max_devsw_convs = DEVSW_ARRAY_SIZE(devsw_conv0);\n", 201 fp) < 0) 202 return (1); 203 204 return (0); 205 } 206 207 /* 208 * Emit specific device major informations. 209 */ 210 static int 211 emitdev(FILE *fp) 212 { 213 struct devm *dm; 214 char mstr[16]; 215 216 if (fputs("\n", fp) < 0) 217 return (1); 218 219 (void)strlcpy(mstr, "swap", sizeof(mstr)); 220 if ((dm = ht_lookup(bdevmtab, intern(mstr))) != NULL) { 221 if (fprintf(fp, "const dev_t swapdev = makedev(%d, 0);\n", 222 dm->dm_bmajor) < 0) 223 return (1); 224 } 225 226 (void)strlcpy(mstr, "mem", sizeof(mstr)); 227 if ((dm = ht_lookup(cdevmtab, intern(mstr))) == NULL) 228 panic("memory device is not configured"); 229 if (fprintf(fp, "const dev_t zerodev = makedev(%d, DEV_ZERO);\n", 230 dm->dm_cmajor) < 0) 231 return (1); 232 233 if (fputs("\n/* mem_no is only used in iskmemdev() */\n", fp) < 0) 234 return (1); 235 if (fprintf(fp, "const int mem_no = %d;\n", dm->dm_cmajor) < 0) 236 return (1); 237 238 return (0); 239 } 240