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 #include <string.h>
  55
  56 int main __P((int, char *[]));
  57 static void usage __P((void));
  58 typedef dev_t pack_t __P((int, u_long []));
  59
  60
  61 pack_t pack_native;
  62
  63 dev_t
  64 pack_native(n, numbers)
  65         int n;
  66         u_long numbers[];
  67 {
  68         dev_t dev=0; /* Quiet -Wall */
  69
  70         if (n == 2) {
  71                 dev = makedev(numbers[0], numbers[1]);
  72                 if (major(dev) != numbers[0])
  73                         errx(1, "invalid major number");
  74                 if (minor(dev) != numbers[1])
  75                         errx(1, "invalid minor number");
  76         } else
  77                 errx(1, "too many fields for format");
  78         return (dev);
  79 }
  80
  81
  82 #define major_netbsd(x)         ((int32_t)((((x) & 0x000fff00) >>  8)))
  83 #define minor_netbsd(x)         ((int32_t)((((x) & 0xfff00000) >> 12) | \
  84                                            (((x) & 0x000000ff) >>  0)))
  85 #define makedev_netbsd(x,y)     ((dev_t)((((x) <<  8) & 0x000fff00) | \
  86                                          (((y) << 12) & 0xfff00000) | \
  87                                          (((y) <<  0) & 0x000000ff)))
  88
  89 pack_t pack_netbsd;
  90
  91 dev_t
  92 pack_netbsd(n, numbers)
  93         int n;
  94         u_long numbers[];
  95 {
  96         dev_t dev=0; /* Quiet -Wall */
  97
  98         if (n == 2) {
  99                 dev = makedev_netbsd(numbers[0], numbers[1]);
 100                 if (major_netbsd(dev) != numbers[0])
 101                         errx(1, "invalid major number");
 102                 if (minor_netbsd(dev) != numbers[1])
 103                         errx(1, "invalid minor number");
 104         } else
 105                 errx(1, "too many fields for format");
 106         return (dev);
 107 }
 108
 109
 110 #define major_freebsd(x)        ((int32_t)(((x) & 0x0000ff00) >> 8))
 111 #define minor_freebsd(x)        ((int32_t)(((x) & 0xffff00ff) >> 0))
 112 #define makedev_freebsd(x,y)    ((dev_t)((((x) << 8) & 0x0000ff00) | \
 113                                          (((y) << 0) & 0xffff00ff)))
 114
 115 pack_t pack_freebsd;
 116
 117 dev_t
 118 pack_freebsd(n, numbers)
 119         int n;
 120         u_long numbers[];
 121 {
 122         dev_t dev=0; /* Quiet -Wall */
 123
 124         if (n == 2) {
 125                 dev = makedev_freebsd(numbers[0], numbers[1]);
 126                 if (major_freebsd(dev) != numbers[0])
 127                         errx(1, "invalid major number");
 128                 if (minor_freebsd(dev) != numbers[1])
 129                         errx(1, "invalid minor number");
 130         } else
 131                 errx(1, "too many fields for format");
 132         return (dev);
 133 }
 134
 135
 136 #define major_8_8(x)            ((int32_t)(((x) & 0x0000ff00) >> 8))
 137 #define minor_8_8(x)            ((int32_t)(((x) & 0x000000ff) >> 0))
 138 #define makedev_8_8(x,y)        ((dev_t)((((x) << 8) & 0x0000ff00) | \
 139                                          (((y) << 0) & 0x000000ff)))
 140
 141 pack_t pack_8_8;
 142
 143 dev_t
 144 pack_8_8(n, numbers)
 145         int n;
 146         u_long numbers[];
 147 {
 148         dev_t dev=0; /* Quiet -Wall */
 149
 150         if (n == 2) {
 151                 dev = makedev_8_8(numbers[0], numbers[1]);
 152                 if (major_8_8(dev) != numbers[0])
 153                         errx(1, "invalid major number");
 154                 if (minor_8_8(dev) != numbers[1])
 155                         errx(1, "invalid minor number");
 156         } else
 157                 errx(1, "too many fields for format");
 158         return (dev);
 159 }
 160
 161
 162 #define major_12_20(x)          ((int32_t)(((x) & 0xfff00000) >> 20))
 163 #define minor_12_20(x)          ((int32_t)(((x) & 0x000fffff) >>  0))
 164 #define makedev_12_20(x,y)      ((dev_t)((((x) << 20) & 0xfff00000) | \
 165                                          (((y) <<  0) & 0x000fffff)))
 166
 167 pack_t pack_12_20;
 168
 169 dev_t
 170 pack_12_20(n, numbers)
 171         int n;
 172         u_long numbers[];
 173 {
 174         dev_t dev=0; /* Quiet -Wall */
 175
 176         if (n == 2) {
 177                 dev = makedev_12_20(numbers[0], numbers[1]);
 178                 if (major_12_20(dev) != numbers[0])
 179                         errx(1, "invalid major number");
 180                 if (minor_12_20(dev) != numbers[1])
 181                         errx(1, "invalid minor number");
 182         } else
 183                 errx(1, "too many fields for format");
 184         return (dev);
 185 }
 186
 187
 188 #define major_14_18(x)          ((int32_t)(((x) & 0xfffc0000) >> 18))
 189 #define minor_14_18(x)          ((int32_t)(((x) & 0x0003ffff) >>  0))
 190 #define makedev_14_18(x,y)      ((dev_t)((((x) << 18) & 0xfffc0000) | \
 191                                          (((y) <<  0) & 0x0003ffff)))
 192
 193 pack_t pack_14_18;
 194
 195 dev_t
 196 pack_14_18(n, numbers)
 197         int n;
 198         u_long numbers[];
 199 {
 200         dev_t dev=0; /* Quiet -Wall */
 201
 202         if (n == 2) {
 203                 dev = makedev_14_18(numbers[0], numbers[1]);
 204                 if (major_14_18(dev) != numbers[0])
 205                         errx(1, "invalid major number");
 206                 if (minor_14_18(dev) != numbers[1])
 207                         errx(1, "invalid minor number");
 208         } else
 209                 errx(1, "too many fields for format");
 210         return (dev);
 211 }
 212
 213
 214 #define major_8_24(x)           ((int32_t)(((x) & 0xff000000) >> 24))
 215 #define minor_8_24(x)           ((int32_t)(((x) & 0x00ffffff) >>  0))
 216 #define makedev_8_24(x,y)       ((dev_t)((((x) << 24) & 0xff000000) | \
 217                                          (((y) <<  0) & 0x00ffffff)))
 218
 219 pack_t pack_8_24;
 220
 221 dev_t
 222 pack_8_24(n, numbers)
 223         int n;
 224         u_long numbers[];
 225 {
 226         dev_t dev=0; /* Quiet -Wall */
 227
 228         if (n == 2) {
 229                 dev = makedev_8_24(numbers[0], numbers[1]);
 230                 if (major_8_24(dev) != numbers[0])
 231                         errx(1, "invalid major number");
 232                 if (minor_8_24(dev) != numbers[1])
 233                         errx(1, "invalid minor number");
 234         } else
 235                 errx(1, "too many fields for format");
 236         return (dev);
 237 }
 238
 239
 240 #define major_12_12_8(x)        ((int32_t)(((x) & 0xfff00000) >> 20))
 241 #define unit_12_12_8(x)         ((int32_t)(((x) & 0x000fff00) >>  8))
 242 #define subunit_12_12_8(x)      ((int32_t)(((x) & 0x000000ff) >>  0))
 243 #define makedev_12_12_8(x,y,z)  ((dev_t)((((x) << 20) & 0xfff00000) | \
 244                                          (((y) <<  8) & 0x000fff00) | \
 245                                          (((z) <<  0) & 0x000000ff)))
 246
 247 pack_t pack_bsdos;
 248
 249 dev_t
 250 pack_bsdos(n, numbers)
 251         int n;
 252         u_long numbers[];
 253 {
 254         dev_t dev=0; /* Quiet -Wall */
 255
 256         if (n == 2) {
 257                 dev = makedev_12_20(numbers[0], numbers[1]);
 258                 if (major_12_20(dev) != numbers[0])
 259                         errx(1, "invalid major number");
 260                 if (minor_12_20(dev) != numbers[1])
 261                         errx(1, "invalid minor number");
 262         } else if (n == 3) {
 263                 dev = makedev_12_12_8(numbers[0], numbers[1], numbers[2]);
 264                 if (major_12_12_8(dev) != numbers[0])
 265                         errx(1, "invalid major number");
 266                 if (unit_12_12_8(dev) != numbers[1])
 267                         errx(1, "invalid unit number");
 268                 if (subunit_12_12_8(dev) != numbers[2])
 269                         errx(1, "invalid subunit number");
 270         } else
 271                 errx(1, "too many fields for format");
 272         return (dev);
 273 }
 274
 275
 276 struct format {
 277         char    *name;
 278         pack_t  *pack;
 279 } formats[] = {
 280         {"386bsd",  pack_8_8},
 281         {"4bsd",    pack_8_8},
 282         {"bsdos",   pack_bsdos},
 283         {"freebsd", pack_freebsd},
 284         {"hpux",    pack_8_24},
 285         {"isc",     pack_8_8},
 286         {"linux",   pack_8_8},
 287         {"native",  pack_native},
 288         {"netbsd",  pack_netbsd},
 289         {"osf1",    pack_12_20},
 290         {"sco",     pack_8_8},
 291         {"solaris", pack_14_18},
 292         {"sunos",   pack_8_8},
 293         {"svr3",    pack_8_8},
 294         {"svr4",    pack_14_18},
 295         {"ultrix",  pack_8_8},
 296 };
 297
 298 int compare_format __P((const void *, const void *));
 299
 300 int
 301 compare_format(key, element)
 302         const void *key;
 303         const void *element;
 304 {
 305         const char *name;
 306         const struct format *format;
 307
 308         name = key;
 309         format = element;
 310
 311         return (strcmp(name, format->name));
 312 }
 313
 314
 315 int
 316 main(argc, argv)
 317         int argc;
 318         char **argv;
 319 {
 320         char *name;
 321         mode_t mode;
 322         dev_t dev;
 323         pack_t *pack;
 324         u_long numbers[8];
 325         struct format *format;
 326         char *p;
 327         int n;
 328         int ch;
 329
 330         pack = pack_native;
 331
 332         while ((ch = getopt(argc, argv, "F:")) != -1) {
 333                 switch (ch) {
 334                 case 'F':
 335                         format = bsearch(optarg, formats,
 336                             sizeof(formats)/sizeof(formats[0]),
 337                             sizeof(formats[0]), compare_format);
 338                         if (format == 0)
 339                                 errx(1, "invalid format: %s", optarg);
 340                         pack = format->pack;
 341                         break;
 342
 343                 default:
 344                 case '?':
 345                         usage();
 346                 }
 347         }
 348         argc -= optind;
 349         argv += optind;
 350
 351         if (argc < 2 || argc > 10)
 352                 usage();
 353
 354         name = *argv;
 355         argc--;
 356         argv++;
 357
 358         mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH;
 359         if (*argv[0] == 'c')
 360                 mode |= S_IFCHR;
 361         else if (*argv[0] == 'b')
 362                 mode |= S_IFBLK;
 363         else if (*argv[0] == 'w')
 364                 mode |= S_IFWHT;
 365         else
 366                 errx(1, "node type must be 'b' or 'c' or 'w'.");
 367         argc--;
 368         argv++;
 369
 370         for (n = 0; n < argc; n++) {
 371                 if (S_ISWHT(mode)) {
 372                         errx(1, "whiteout nodes have no device numbers.");
 373                 }
 374                 numbers[n] = strtoul(argv[n], &p, 0);
 375                 if ((p && *p != '\0') || (numbers[n] == ULONG_MAX && errno == ERANGE))
 376                         errx(1, "invalid number: %s", argv[n]);
 377         }
 378
 379         if (S_ISWHT(mode))
 380                 dev = 0;
 381         else if (argc == 1)
 382                 dev = (dev_t)numbers[0];
 383         else
 384                 dev = (*pack)(argc, numbers);
 385
 386 #if 0
 387         printf("name: %s\nmode: %05o\ndev:  %08x\n", name, mode, dev);
 388 #else
 389         if (mknod(name, mode, dev) < 0)
 390                 err(1, "%s", name);
 391 #endif
 392
 393         exit(0);
 394 }
 395
 396 void
 397 usage()
 398 {
 399
 400         fprintf(stderr, "usage: mknod [-F format] name [b | c] major minor\n");
 401         fprintf(stderr, "       mknod [-F format] name [b | c] major unit subunit\n");
 402         fprintf(stderr, "       mknod name [b | c] number\n");
 403         fprintf(stderr, "       mknod name w\n");
 404         exit(1);
 405 }