mknod.c revision 55496
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#endif 47static const char rcsid[] = 48 "$FreeBSD: head/sbin/mknod/mknod.c 55496 2000-01-06 05:20:14Z obrien $"; 49#endif /* not lint */ 50 51#include <sys/types.h> 52#include <sys/stat.h> 53 54#include <err.h> 55#include <errno.h> 56#include <stdio.h> 57#include <stdlib.h> 58#include <unistd.h> 59#include <grp.h> 60#include <pwd.h> 61#include <string.h> 62 63static void 64usage() 65{ 66 67 (void)fprintf(stderr, 68 "usage: mknod name [b | c] major minor [owner:group]\n"); 69 exit(1); 70} 71 72static u_long 73id(name, type) 74 char *name, *type; 75{ 76 u_long val; 77 char *ep; 78 79 /* 80 * XXX 81 * We know that uid_t's and gid_t's are unsigned longs. 82 */ 83 errno = 0; 84 val = strtoul(name, &ep, 10); 85 if (errno) 86 err(1, "%s", name); 87 if (*ep != '\0') 88 errx(1, "%s: illegal %s name", name, type); 89 return (val); 90} 91 92static gid_t 93a_gid(s) 94 char *s; 95{ 96 struct group *gr; 97 98 if (*s == '\0') /* Argument was "uid[:.]". */ 99 errx(1, "group must be specified when the owner is"); 100 return ((gr = getgrnam(s)) == NULL) ? id(s, "group") : gr->gr_gid; 101} 102 103static uid_t 104a_uid(s) 105 char *s; 106{ 107 struct passwd *pw; 108 109 if (*s == '\0') /* Argument was "[:.]gid". */ 110 errx(1, "owner must be specified when the group is"); 111 return ((pw = getpwnam(s)) == NULL) ? id(s, "user") : pw->pw_uid; 112} 113 114int 115main(argc, argv) 116 int argc; 117 char **argv; 118{ 119 int range_error; 120 uid_t uid; 121 gid_t gid; 122 mode_t mode; 123 dev_t dev; 124 char *cp, *endp; 125 long mymajor, myminor; 126 127 if (argc != 5 && argc != 6) 128 usage(); 129 130 mode = 0666; 131 if (argv[2][0] == 'c') 132 mode |= S_IFCHR; 133 else if (argv[2][0] == 'b') 134 mode |= S_IFBLK; 135 else 136 errx(1, "node must be type 'b' or 'c'"); 137 138 errno = 0; 139 mymajor = (long)strtoul(argv[3], &endp, 0); 140 if (endp == argv[3] || *endp != '\0') 141 errx(1, "%s: non-numeric major number", argv[3]); 142 range_error = errno; 143 errno = 0; 144 myminor = (long)strtoul(argv[4], &endp, 0); 145 if (endp == argv[4] || *endp != '\0') 146 errx(1, "%s: non-numeric minor number", argv[4]); 147 range_error |= errno; 148 dev = makedev(mymajor, myminor); 149 if (range_error || major(dev) != (u_int) mymajor || 150 minor(dev) != (u_int) myminor) 151 errx(1, "major or minor number too large"); 152 153 uid = gid = -1; 154 if (6 == argc) { 155 /* have owner:group */ 156 if ((cp = strchr(argv[5], ':')) != NULL) { 157 *cp++ = '\0'; 158 gid = a_gid(cp); 159 } else 160 usage(); 161 uid = a_uid(argv[5]); 162 } 163 164 if (mknod(argv[1], mode, dev) != 0) 165 err(1, "%s", argv[1]); 166 if (6 == argc) 167 if (chown(argv[1], uid, gid)) 168 err(1, "setting ownership on %s", argv[1]); 169 exit(0); 170} 171