mknod.c revision 1.12
1 /* $NetBSD: mknod.c,v 1.12 1998/01/17 13:04:18 mycroft Exp $ */ 2 3 /* 4 * Copyright (c) 1998 Charles M. Hannum. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Charles M. Hannum. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1998 Charles M. Hannum. All rights reserved.\n"); 35 __RCSID("$NetBSD: mknod.c,v 1.12 1998/01/17 13:04:18 mycroft Exp $"); 36 #endif /* not lint */ 37 38 #include <sys/types.h> 39 #include <sys/stat.h> 40 41 #include <err.h> 42 #include <errno.h> 43 #include <limits.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <unistd.h> 47 48 int main __P((int, char *[])); 49 static void usage __P((void)); 50 typedef dev_t pack_t __P((u_long, u_long, u_long *, u_long *)); 51 52 53 pack_t pack_native; 54 55 dev_t 56 pack_native(maj, min, maj2, min2) 57 u_long maj, min, *maj2, *min2; 58 { 59 dev_t dev; 60 61 dev = makedev(maj, min); 62 *maj2 = major(dev); 63 *min2 = minor(dev); 64 return (dev); 65 } 66 67 68 #define major_netbsd(x) ((int32_t)((((x) & 0x000fff00) >> 8))) 69 #define minor_netbsd(x) ((int32_t)((((x) & 0xfff00000) >> 12) | \ 70 (((x) & 0x000000ff) >> 0))) 71 #define makedev_netbsd(x,y) ((dev_t)((((x) << 8) & 0x000fff00) | \ 72 (((y) << 12) & 0xfff00000) | \ 73 (((y) << 0) & 0x000000ff))) 74 75 pack_t pack_netbsd; 76 77 dev_t 78 pack_netbsd(maj, min, maj2, min2) 79 u_long maj, min, *maj2, *min2; 80 { 81 dev_t dev; 82 83 dev = makedev_netbsd(maj, min); 84 *maj2 = major_netbsd(dev); 85 *min2 = minor_netbsd(dev); 86 return (dev); 87 } 88 89 90 #define major_freebsd(x) ((int32_t)(((x) & 0x0000ff00) >> 8)) 91 #define minor_freebsd(x) ((int32_t)(((x) & 0xffff00ff) >> 0)) 92 #define makedev_freebsd(x,y) ((dev_t)((((x) << 8) & 0x0000ff00) | \ 93 (((y) << 0) & 0xffff00ff))) 94 95 pack_t pack_freebsd; 96 97 dev_t 98 pack_freebsd(maj, min, maj2, min2) 99 u_long maj, min, *maj2, *min2; 100 { 101 dev_t dev; 102 103 dev = makedev_freebsd(maj, min); 104 *maj2 = major_freebsd(dev); 105 *min2 = minor_freebsd(dev); 106 return (dev); 107 } 108 109 110 #define major_8_8(x) ((int32_t)(((x) & 0x0000ff00) >> 8)) 111 #define minor_8_8(x) ((int32_t)(((x) & 0x000000ff) >> 0)) 112 #define makedev_8_8(x,y) ((dev_t)((((x) << 8) & 0x0000ff00) | \ 113 (((y) << 0) & 0x000000ff))) 114 115 pack_t pack_8_8; 116 117 dev_t 118 pack_8_8(maj, min, maj2, min2) 119 u_long maj, min, *maj2, *min2; 120 { 121 dev_t dev; 122 123 dev = makedev_8_8(maj, min); 124 *maj2 = major_8_8(dev); 125 *min2 = minor_8_8(dev); 126 return (dev); 127 } 128 129 130 #define major_12_20(x) ((int32_t)(((x) & 0xfff00000) >> 20)) 131 #define minor_12_20(x) ((int32_t)(((x) & 0x000fffff) >> 0)) 132 #define makedev_12_20(x,y) ((dev_t)((((x) << 20) & 0xfff00000) | \ 133 (((y) << 0) & 0x000fffff))) 134 135 pack_t pack_12_20; 136 137 dev_t 138 pack_12_20(maj, min, maj2, min2) 139 u_long maj, min, *maj2, *min2; 140 { 141 dev_t dev; 142 143 dev = makedev_12_20(maj, min); 144 *maj2 = major_12_20(dev); 145 *min2 = minor_12_20(dev); 146 return (dev); 147 } 148 149 150 #define major_14_18(x) ((int32_t)(((x) & 0xfffc0000) >> 18)) 151 #define minor_14_18(x) ((int32_t)(((x) & 0x0003ffff) >> 0)) 152 #define makedev_14_18(x,y) ((dev_t)((((x) << 18) & 0xfffc0000) | \ 153 (((y) << 0) & 0x0003ffff))) 154 155 pack_t pack_14_18; 156 157 dev_t 158 pack_14_18(maj, min, maj2, min2) 159 u_long maj, min, *maj2, *min2; 160 { 161 dev_t dev; 162 163 dev = makedev_14_18(maj, min); 164 *maj2 = major_14_18(dev); 165 *min2 = minor_14_18(dev); 166 return (dev); 167 } 168 169 170 #define major_8_24(x) ((int32_t)(((x) & 0xff000000) >> 24)) 171 #define minor_8_24(x) ((int32_t)(((x) & 0x00ffffff) >> 0)) 172 #define makedev_8_24(x,y) ((dev_t)((((x) << 24) & 0xff000000) | \ 173 (((y) << 0) & 0x00ffffff))) 174 175 pack_t pack_8_24; 176 177 dev_t 178 pack_8_24(maj, min, maj2, min2) 179 u_long maj, min, *maj2, *min2; 180 { 181 dev_t dev; 182 183 dev = makedev_8_24(maj, min); 184 *maj2 = major_8_24(dev); 185 *min2 = minor_8_24(dev); 186 return (dev); 187 } 188 189 190 struct format { 191 char *name; 192 pack_t *pack; 193 } formats[] = { 194 {"386bsd", pack_8_8}, 195 {"4bsd", pack_8_8}, 196 {"bsdos", pack_12_20}, 197 {"freebsd", pack_freebsd}, 198 {"hpux", pack_8_24}, 199 {"linux", pack_8_8}, 200 {"native", pack_native}, 201 {"netbsd", pack_netbsd}, 202 {"osf1", pack_12_20}, 203 {"solaris", pack_14_18}, 204 {"sunos", pack_8_8}, 205 {"svr3", pack_8_8}, 206 {"svr4", pack_14_18}, 207 {"ultrix", pack_8_8}, 208 }; 209 210 int compare_format __P((const void *, const void *)); 211 212 int 213 compare_format(key, element) 214 const void *key; 215 const void *element; 216 { 217 const char *name; 218 const struct format *format; 219 220 name = key; 221 format = element; 222 223 return (strcmp(name, format->name)); 224 } 225 226 227 int 228 main(argc, argv) 229 int argc; 230 char **argv; 231 { 232 struct format *format; 233 pack_t *pack; 234 char *p; 235 u_long maj, min, maj2, min2; 236 mode_t mode; 237 dev_t dev; 238 int ch; 239 240 pack = pack_native; 241 242 while ((ch = getopt(argc, argv, "F:")) != -1) { 243 switch (ch) { 244 case 'F': 245 format = bsearch(optarg, formats, 246 sizeof(formats)/sizeof(formats[0]), 247 sizeof(formats[0]), compare_format); 248 if (format == 0) 249 errx(1, "invalid format: %s", optarg); 250 pack = format->pack; 251 break; 252 253 default: 254 case '?': 255 usage(); 256 } 257 } 258 argc -= optind; 259 argv += optind; 260 261 if (argc != 3 && argc != 4) 262 usage(); 263 264 mode = 0666; 265 if (argv[1][0] == 'c') 266 mode |= S_IFCHR; 267 else if (argv[1][0] == 'b') 268 mode |= S_IFBLK; 269 else 270 errx(1, "node must be type 'b' or 'c'."); 271 272 if (argc == 4) { 273 maj = strtoul(argv[2], &p, 0); 274 if ((p && *p != '\0') || (maj == ULONG_MAX && errno == ERANGE)) 275 errx(1, "invalid major number: %s", argv[2]); 276 277 min = strtoul(argv[3], &p, 0); 278 if ((p && *p != '\0') || (min == ULONG_MAX && errno == ERANGE)) 279 errx(1, "invalid minor number: %s", argv[3]); 280 281 dev = (*pack)(maj, min, &maj2, &min2); 282 283 if (maj2 != maj) 284 errx(1, "major number out of range: %s", argv[2]); 285 286 if (min2 != min) 287 errx(1, "minor number out of range: %s", argv[3]); 288 } else { 289 dev = (dev_t) strtoul(argv[2], &p, 0); 290 if ((p && *p != '\0') || (dev == ULONG_MAX && errno == ERANGE)) 291 errx(1, "invalid device number: %s", argv[2]); 292 } 293 294 if (mknod(argv[0], mode, dev) < 0) 295 err(1, "%s", argv[0]); 296 297 exit(0); 298 } 299 300 void 301 usage() 302 { 303 304 fprintf(stderr, "usage: mknod [-F format] name [b | c] major minor\n"); 305 fprintf(stderr, " mknod name [b | c] number\n"); 306 exit(1); 307 } 308
Indexes created Fri Oct 03 02:09:57 GMT 2025