mknod.c revision 22990
1/* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Kevin Fall. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37#ifndef lint 38static const char copyright[] = 39"@(#) Copyright (c) 1989, 1993\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41#endif /* not lint */ 42 43#ifndef lint 44#if 0 45static char sccsid[] = "@(#)mknod.c 8.1 (Berkeley) 6/5/93"; 46#else 47static const char rcsid[] = 48 "$Id$"; 49#endif 50#endif /* not lint */ 51 52#include <sys/types.h> 53#include <sys/stat.h> 54 55#include <errno.h> 56#include <stdio.h> 57#include <stdlib.h> 58#include <string.h> 59#include <unistd.h> 60 61int 62main(argc, argv) 63 int argc; 64 char **argv; 65{ 66 dev_t dev; 67 char *endp; 68 long major, minor; 69 mode_t mode; 70 int range_error; 71 72 if (argc != 5) { 73 (void)fprintf(stderr, 74 "usage: mknod name [b | c] major minor\n"); 75 exit(1); 76 } 77 78 mode = 0666; 79 if (argv[2][0] == 'c') 80 mode |= S_IFCHR; 81 else if (argv[2][0] == 'b') 82 mode |= S_IFBLK; 83 else { 84 (void)fprintf(stderr, 85 "mknod: node must be type 'b' or 'c'\n"); 86 exit(1); 87 } 88 89 errno = 0; 90 major = (long)strtoul(argv[3], &endp, 0); 91 if (endp == argv[3] || *endp != '\0') { 92 (void)fprintf(stderr, 93 "mknod: %s: non-numeric major number\n", argv[3]); 94 exit(1); 95 } 96 range_error = errno; 97 errno = 0; 98 minor = (long)strtoul(argv[4], &endp, 0); 99 if (endp == argv[3] || *endp != '\0') { 100 (void)fprintf(stderr, 101 "mknod: %s: non-numeric minor number\n", argv[4]); 102 exit(1); 103 } 104 range_error |= errno; 105 dev = makedev(major, minor); 106 if (range_error || major(dev) != major || minor(dev) != minor) { 107 (void)fprintf(stderr, 108 "mknod: major or minor number too large\n"); 109 exit(1); 110 } 111 112 if (mknod(argv[1], mode, dev) != 0) { 113 (void)fprintf(stderr, 114 "mknod: %s: %s\n", argv[1], strerror(errno)); 115 exit(1); 116 } 117 exit(0); 118} 119