mknod.c revision 1.13
1 /* $NetBSD: mknod.c,v 1.13 1998/08/15 09:16:28 mycroft Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 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/cdefs.h> 40 #ifndef lint 41 __COPYRIGHT("@(#) Copyright (c) 1998 The NetBSD Foundation, Inc. All rights reserved.\n"); 42 __RCSID("$NetBSD: mknod.c,v 1.13 1998/08/15 09:16:28 mycroft Exp $"); 43 #endif /* not lint */ 44 45 #include <sys/types.h> 46 #include <sys/stat.h> 47 48 #include <err.h> 49 #include <errno.h> 50 #include <limits.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <unistd.h> 54 55 int main __P((int, char *[])); 56 static void usage __P((void)); 57 typedef dev_t pack_t __P((u_long, u_long, u_long *, u_long *)); 58 59 60 pack_t pack_native; 61 62 dev_t 63 pack_native(maj, min, maj2, min2) 64 u_long maj, min, *maj2, *min2; 65 { 66 dev_t dev; 67 68 dev = makedev(maj, min); 69 *maj2 = major(dev); 70 *min2 = minor(dev); 71 return (dev); 72 } 73 74 75 #define major_netbsd(x) ((int32_t)((((x) & 0x000fff00) >> 8))) 76 #define minor_netbsd(x) ((int32_t)((((x) & 0xfff00000) >> 12) | \ 77 (((x) & 0x000000ff) >> 0))) 78 #define makedev_netbsd(x,y) ((dev_t)((((x) << 8) & 0x000fff00) | \ 79 (((y) << 12) & 0xfff00000) | \ 80 (((y) << 0) & 0x000000ff))) 81 82 pack_t pack_netbsd; 83 84 dev_t 85 pack_netbsd(maj, min, maj2, min2) 86 u_long maj, min, *maj2, *min2; 87 { 88 dev_t dev; 89 90 dev = makedev_netbsd(maj, min); 91 *maj2 = major_netbsd(dev); 92 *min2 = minor_netbsd(dev); 93 return (dev); 94 } 95 96 97 #define major_freebsd(x) ((int32_t)(((x) & 0x0000ff00) >> 8)) 98 #define minor_freebsd(x) ((int32_t)(((x) & 0xffff00ff) >> 0)) 99 #define makedev_freebsd(x,y) ((dev_t)((((x) << 8) & 0x0000ff00) | \ 100 (((y) << 0) & 0xffff00ff))) 101 102 pack_t pack_freebsd; 103 104 dev_t 105 pack_freebsd(maj, min, maj2, min2) 106 u_long maj, min, *maj2, *min2; 107 { 108 dev_t dev; 109 110 dev = makedev_freebsd(maj, min); 111 *maj2 = major_freebsd(dev); 112 *min2 = minor_freebsd(dev); 113 return (dev); 114 } 115 116 117 #define major_8_8(x) ((int32_t)(((x) & 0x0000ff00) >> 8)) 118 #define minor_8_8(x) ((int32_t)(((x) & 0x000000ff) >> 0)) 119 #define makedev_8_8(x,y) ((dev_t)((((x) << 8) & 0x0000ff00) | \ 120 (((y) << 0) & 0x000000ff))) 121 122 pack_t pack_8_8; 123 124 dev_t 125 pack_8_8(maj, min, maj2, min2) 126 u_long maj, min, *maj2, *min2; 127 { 128 dev_t dev; 129 130 dev = makedev_8_8(maj, min); 131 *maj2 = major_8_8(dev); 132 *min2 = minor_8_8(dev); 133 return (dev); 134 } 135 136 137 #define major_12_20(x) ((int32_t)(((x) & 0xfff00000) >> 20)) 138 #define minor_12_20(x) ((int32_t)(((x) & 0x000fffff) >> 0)) 139 #define makedev_12_20(x,y) ((dev_t)((((x) << 20) & 0xfff00000) | \ 140 (((y) << 0) & 0x000fffff))) 141 142 pack_t pack_12_20; 143 144 dev_t 145 pack_12_20(maj, min, maj2, min2) 146 u_long maj, min, *maj2, *min2; 147 { 148 dev_t dev; 149 150 dev = makedev_12_20(maj, min); 151 *maj2 = major_12_20(dev); 152 *min2 = minor_12_20(dev); 153 return (dev); 154 } 155 156 157 #define major_14_18(x) ((int32_t)(((x) & 0xfffc0000) >> 18)) 158 #define minor_14_18(x) ((int32_t)(((x) & 0x0003ffff) >> 0)) 159 #define makedev_14_18(x,y) ((dev_t)((((x) << 18) & 0xfffc0000) | \ 160 (((y) << 0) & 0x0003ffff))) 161 162 pack_t pack_14_18; 163 164 dev_t 165 pack_14_18(maj, min, maj2, min2) 166 u_long maj, min, *maj2, *min2; 167 { 168 dev_t dev; 169 170 dev = makedev_14_18(maj, min); 171 *maj2 = major_14_18(dev); 172 *min2 = minor_14_18(dev); 173 return (dev); 174 } 175 176 177 #define major_8_24(x) ((int32_t)(((x) & 0xff000000) >> 24)) 178 #define minor_8_24(x) ((int32_t)(((x) & 0x00ffffff) >> 0)) 179 #define makedev_8_24(x,y) ((dev_t)((((x) << 24) & 0xff000000) | \ 180 (((y) << 0) & 0x00ffffff))) 181 182 pack_t pack_8_24; 183 184 dev_t 185 pack_8_24(maj, min, maj2, min2) 186 u_long maj, min, *maj2, *min2; 187 { 188 dev_t dev; 189 190 dev = makedev_8_24(maj, min); 191 *maj2 = major_8_24(dev); 192 *min2 = minor_8_24(dev); 193 return (dev); 194 } 195 196 197 struct format { 198 char *name; 199 pack_t *pack; 200 } formats[] = { 201 {"386bsd", pack_8_8}, 202 {"4bsd", pack_8_8}, 203 {"bsdos", pack_12_20}, 204 {"freebsd", pack_freebsd}, 205 {"hpux", pack_8_24}, 206 {"linux", pack_8_8}, 207 {"native", pack_native}, 208 {"netbsd", pack_netbsd}, 209 {"osf1", pack_12_20}, 210 {"solaris", pack_14_18}, 211 {"sunos", pack_8_8}, 212 {"svr3", pack_8_8}, 213 {"svr4", pack_14_18}, 214 {"ultrix", pack_8_8}, 215 }; 216 217 int compare_format __P((const void *, const void *)); 218 219 int 220 compare_format(key, element) 221 const void *key; 222 const void *element; 223 { 224 const char *name; 225 const struct format *format; 226 227 name = key; 228 format = element; 229 230 return (strcmp(name, format->name)); 231 } 232 233 234 int 235 main(argc, argv) 236 int argc; 237 char **argv; 238 { 239 struct format *format; 240 pack_t *pack; 241 char *p; 242 u_long maj, min, maj2, min2; 243 mode_t mode; 244 dev_t dev; 245 int ch; 246 247 pack = pack_native; 248 249 while ((ch = getopt(argc, argv, "F:")) != -1) { 250 switch (ch) { 251 case 'F': 252 format = bsearch(optarg, formats, 253 sizeof(formats)/sizeof(formats[0]), 254 sizeof(formats[0]), compare_format); 255 if (format == 0) 256 errx(1, "invalid format: %s", optarg); 257 pack = format->pack; 258 break; 259 260 default: 261 case '?': 262 usage(); 263 } 264 } 265 argc -= optind; 266 argv += optind; 267 268 if (argc != 3 && argc != 4) 269 usage(); 270 271 mode = 0666; 272 if (argv[1][0] == 'c') 273 mode |= S_IFCHR; 274 else if (argv[1][0] == 'b') 275 mode |= S_IFBLK; 276 else 277 errx(1, "node must be type 'b' or 'c'."); 278 279 if (argc == 4) { 280 maj = strtoul(argv[2], &p, 0); 281 if ((p && *p != '\0') || (maj == ULONG_MAX && errno == ERANGE)) 282 errx(1, "invalid major number: %s", argv[2]); 283 284 min = strtoul(argv[3], &p, 0); 285 if ((p && *p != '\0') || (min == ULONG_MAX && errno == ERANGE)) 286 errx(1, "invalid minor number: %s", argv[3]); 287 288 dev = (*pack)(maj, min, &maj2, &min2); 289 290 if (maj2 != maj) 291 errx(1, "major number out of range: %s", argv[2]); 292 293 if (min2 != min) 294 errx(1, "minor number out of range: %s", argv[3]); 295 } else { 296 dev = (dev_t) strtoul(argv[2], &p, 0); 297 if ((p && *p != '\0') || (dev == ULONG_MAX && errno == ERANGE)) 298 errx(1, "invalid device number: %s", argv[2]); 299 } 300 301 if (mknod(argv[0], mode, dev) < 0) 302 err(1, "%s", argv[0]); 303 304 exit(0); 305 } 306 307 void 308 usage() 309 { 310 311 fprintf(stderr, "usage: mknod [-F format] name [b | c] major minor\n"); 312 fprintf(stderr, " mknod name [b | c] number\n"); 313 exit(1); 314 } 315
Indexes created Fri Oct 03 02:09:57 GMT 2025