mknod/mknod.c

   1 /*      $NetBSD: mknod.c,v 1.15 1998/09/11 07:22:13 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 1.15 1998/09/11 07:22:13 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((int, u_long []));
  58
  59
  60 pack_t pack_native;
  61
  62 dev_t
  63 pack_native(n, numbers)
  64         int n;
  65         u_long numbers[];
  66 {
  67         dev_t dev=0; /* Quiet -Wall */
  68
  69         if (n == 2) {
  70                 dev = makedev(numbers[0], numbers[1]);
  71                 if (major(dev) != numbers[0])
  72                         errx(1, "invalid major number");
  73                 if (minor(dev) != numbers[1])
  74                         errx(1, "invalid minor number");
  75         } else
  76                 errx(1, "too many fields for format");
  77         return (dev);
  78 }
  79
  80
  81 #define major_netbsd(x)         ((int32_t)((((x) & 0x000fff00) >>  8)))
  82 #define minor_netbsd(x)         ((int32_t)((((x) & 0xfff00000) >> 12) | \
  83                                            (((x) & 0x000000ff) >>  0)))
  84 #define makedev_netbsd(x,y)     ((dev_t)((((x) <<  8) & 0x000fff00) | \
  85                                          (((y) << 12) & 0xfff00000) | \
  86                                          (((y) <<  0) & 0x000000ff)))
  87
  88 pack_t pack_netbsd;
  89
  90 dev_t
  91 pack_netbsd(n, numbers)
  92         int n;
  93         u_long numbers[];
  94 {
  95         dev_t dev=0; /* Quiet -Wall */
  96
  97         if (n == 2) {
  98                 dev = makedev_netbsd(numbers[0], numbers[1]);
  99                 if (major_netbsd(dev) != numbers[0])
 100                         errx(1, "invalid major number");
 101                 if (minor_netbsd(dev) != numbers[1])
 102                         errx(1, "invalid minor number");
 103         } else
 104                 errx(1, "too many fields for format");
 105         return (dev);
 106 }
 107
 108
 109 #define major_freebsd(x)        ((int32_t)(((x) & 0x0000ff00) >> 8))
 110 #define minor_freebsd(x)        ((int32_t)(((x) & 0xffff00ff) >> 0))
 111 #define makedev_freebsd(x,y)    ((dev_t)((((x) << 8) & 0x0000ff00) | \
 112                                          (((y) << 0) & 0xffff00ff)))
 113
 114 pack_t pack_freebsd;
 115
 116 dev_t
 117 pack_freebsd(n, numbers)
 118         int n;
 119         u_long numbers[];
 120 {
 121         dev_t dev=0; /* Quiet -Wall */
 122
 123         if (n == 2) {
 124                 dev = makedev_freebsd(numbers[0], numbers[1]);
 125                 if (major_freebsd(dev) != numbers[0])
 126                         errx(1, "invalid major number");
 127                 if (minor_freebsd(dev) != numbers[1])
 128                         errx(1, "invalid minor number");
 129         } else
 130                 errx(1, "too many fields for format");
 131         return (dev);
 132 }
 133
 134
 135 #define major_8_8(x)            ((int32_t)(((x) & 0x0000ff00) >> 8))
 136 #define minor_8_8(x)            ((int32_t)(((x) & 0x000000ff) >> 0))
 137 #define makedev_8_8(x,y)        ((dev_t)((((x) << 8) & 0x0000ff00) | \
 138                                          (((y) << 0) & 0x000000ff)))
 139
 140 pack_t pack_8_8;
 141
 142 dev_t
 143 pack_8_8(n, numbers)
 144         int n;
 145         u_long numbers[];
 146 {
 147         dev_t dev=0; /* Quiet -Wall */
 148
 149         if (n == 2) {
 150                 dev = makedev_8_8(numbers[0], numbers[1]);
 151                 if (major_8_8(dev) != numbers[0])
 152                         errx(1, "invalid major number");
 153                 if (minor_8_8(dev) != numbers[1])
 154                         errx(1, "invalid minor number");
 155         } else
 156                 errx(1, "too many fields for format");
 157         return (dev);
 158 }
 159
 160
 161 #define major_12_20(x)          ((int32_t)(((x) & 0xfff00000) >> 20))
 162 #define minor_12_20(x)          ((int32_t)(((x) & 0x000fffff) >>  0))
 163 #define makedev_12_20(x,y)      ((dev_t)((((x) << 20) & 0xfff00000) | \
 164                                          (((y) <<  0) & 0x000fffff)))
 165
 166 pack_t pack_12_20;
 167
 168 dev_t
 169 pack_12_20(n, numbers)
 170         int n;
 171         u_long numbers[];
 172 {
 173         dev_t dev=0; /* Quiet -Wall */
 174
 175         if (n == 2) {
 176                 dev = makedev_12_20(numbers[0], numbers[1]);
 177                 if (major_12_20(dev) != numbers[0])
 178                         errx(1, "invalid major number");
 179                 if (minor_12_20(dev) != numbers[1])
 180                         errx(1, "invalid minor number");
 181         } else
 182                 errx(1, "too many fields for format");
 183         return (dev);
 184 }
 185
 186
 187 #define major_14_18(x)          ((int32_t)(((x) & 0xfffc0000) >> 18))
 188 #define minor_14_18(x)          ((int32_t)(((x) & 0x0003ffff) >>  0))
 189 #define makedev_14_18(x,y)      ((dev_t)((((x) << 18) & 0xfffc0000) | \
 190                                          (((y) <<  0) & 0x0003ffff)))
 191
 192 pack_t pack_14_18;
 193
 194 dev_t
 195 pack_14_18(n, numbers)
 196         int n;
 197         u_long numbers[];
 198 {
 199         dev_t dev=0; /* Quiet -Wall */
 200
 201         if (n == 2) {
 202                 dev = makedev_14_18(numbers[0], numbers[1]);
 203                 if (major_14_18(dev) != numbers[0])
 204                         errx(1, "invalid major number");
 205                 if (minor_14_18(dev) != numbers[1])
 206                         errx(1, "invalid minor number");
 207         } else
 208                 errx(1, "too many fields for format");
 209         return (dev);
 210 }
 211
 212
 213 #define major_8_24(x)           ((int32_t)(((x) & 0xff000000) >> 24))
 214 #define minor_8_24(x)           ((int32_t)(((x) & 0x00ffffff) >>  0))
 215 #define makedev_8_24(x,y)       ((dev_t)((((x) << 24) & 0xff000000) | \
 216                                          (((y) <<  0) & 0x00ffffff)))
 217
 218 pack_t pack_8_24;
 219
 220 dev_t
 221 pack_8_24(n, numbers)
 222         int n;
 223         u_long numbers[];
 224 {
 225         dev_t dev=0; /* Quiet -Wall */
 226
 227         if (n == 2) {
 228                 dev = makedev_8_24(numbers[0], numbers[1]);
 229                 if (major_8_24(dev) != numbers[0])
 230                         errx(1, "invalid major number");
 231                 if (minor_8_24(dev) != numbers[1])
 232                         errx(1, "invalid minor number");
 233         } else
 234                 errx(1, "too many fields for format");
 235         return (dev);
 236 }
 237
 238
 239 #define major_12_12_8(x)        ((int32_t)(((x) & 0xfff00000) >> 20))
 240 #define unit_12_12_8(x)         ((int32_t)(((x) & 0x000fff00) >>  8))
 241 #define subunit_12_12_8(x)      ((int32_t)(((x) & 0x000000ff) >>  0))
 242 #define makedev_12_12_8(x,y,z)  ((dev_t)((((x) << 20) & 0xfff00000) | \
 243                                          (((y) <<  8) & 0x000fff00) | \
 244                                          (((z) <<  0) & 0x000000ff)))
 245
 246 pack_t pack_bsdos;
 247
 248 dev_t
 249 pack_bsdos(n, numbers)
 250         int n;
 251         u_long numbers[];
 252 {
 253         dev_t dev=0; /* Quiet -Wall */
 254
 255         if (n == 2) {
 256                 dev = makedev_12_20(numbers[0], numbers[1]);
 257                 if (major_12_20(dev) != numbers[0])
 258                         errx(1, "invalid major number");
 259                 if (minor_12_20(dev) != numbers[1])
 260                         errx(1, "invalid minor number");
 261         } else if (n == 3) {
 262                 dev = makedev_12_12_8(numbers[0], numbers[1], numbers[2]);
 263                 if (major_12_12_8(dev) != numbers[0])
 264                         errx(1, "invalid major number");
 265                 if (unit_12_12_8(dev) != numbers[1])
 266                         errx(1, "invalid unit number");
 267                 if (subunit_12_12_8(dev) != numbers[2])
 268                         errx(1, "invalid subunit number");
 269         } else
 270                 errx(1, "too many fields for format");
 271         return (dev);
 272 }
 273
 274
 275 struct format {
 276         char    *name;
 277         pack_t  *pack;
 278 } formats[] = {
 279         {"386bsd",  pack_8_8},
 280         {"4bsd",    pack_8_8},
 281         {"bsdos",   pack_bsdos},
 282         {"freebsd", pack_freebsd},
 283         {"hpux",    pack_8_24},
 284         {"isc",     pack_8_8},
 285         {"linux",   pack_8_8},
 286         {"native",  pack_native},
 287         {"netbsd",  pack_netbsd},
 288         {"osf1",    pack_12_20},
 289         {"sco",     pack_8_8},
 290         {"solaris", pack_14_18},
 291         {"sunos",   pack_8_8},
 292         {"svr3",    pack_8_8},
 293         {"svr4",    pack_14_18},
 294         {"ultrix",  pack_8_8},
 295 };
 296
 297 int compare_format __P((const void *, const void *));
 298
 299 int
 300 compare_format(key, element)
 301         const void *key;
 302         const void *element;
 303 {
 304         const char *name;
 305         const struct format *format;
 306
 307         name = key;
 308         format = element;
 309
 310         return (strcmp(name, format->name));
 311 }
 312
 313
 314 int
 315 main(argc, argv)
 316         int argc;
 317         char **argv;
 318 {
 319         char *name;
 320         mode_t mode;
 321         dev_t dev;
 322         pack_t *pack;
 323         u_long numbers[8];
 324         struct format *format;
 325         char *p;
 326         int n;
 327         int ch;
 328
 329         pack = pack_native;
 330
 331         while ((ch = getopt(argc, argv, "F:")) != -1) {
 332                 switch (ch) {
 333                 case 'F':
 334                         format = bsearch(optarg, formats,
 335                             sizeof(formats)/sizeof(formats[0]),
 336                             sizeof(formats[0]), compare_format);
 337                         if (format == 0)
 338                                 errx(1, "invalid format: %s", optarg);
 339                         pack = format->pack;
 340                         break;
 341
 342                 default:
 343                 case '?':
 344                         usage();
 345                 }
 346         }
 347         argc -= optind;
 348         argv += optind;
 349
 350         if (argc < 3 || argc > 10)
 351                 usage();
 352
 353         name = *argv;
 354         argc--;
 355         argv++;
 356
 357         mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH;
 358         if (*argv[0] == 'c')
 359                 mode |= S_IFCHR;
 360         else if (*argv[0] == 'b')
 361                 mode |= S_IFBLK;
 362         else
 363                 errx(1, "node type must be 'b' or 'c'.");
 364         argc--;
 365         argv++;
 366
 367         for (n = 0; n < argc; n++) {
 368                 numbers[n] = strtoul(argv[n], &p, 0);
 369                 if ((p && *p != '\0') || (numbers[n] == ULONG_MAX && errno == ERANGE))
 370                         errx(1, "invalid number: %s", argv[n]);
 371         }
 372
 373         if (argc == 1)
 374                 dev = numbers[0];
 375         else
 376                 dev = (*pack)(argc, numbers);
 377
 378 #if 0
 379         printf("name: %s\nmode: %05o\ndev:  %08x\n", name, mode, dev);
 380 #else
 381         if (mknod(name, mode, dev) < 0)
 382                 err(1, "%s", argv[0]);
 383 #endif
 384
 385         exit(0);
 386 }
 387
 388 void
 389 usage()
 390 {
 391
 392         fprintf(stderr, "usage: mknod [-F format] name [b | c] major minor\n");
 393         fprintf(stderr, "       mknod [-F format] name [b | c] major unit subunit\n");
 394         fprintf(stderr, "       mknod name [b | c] number\n");
 395         exit(1);
 396 }