1 /* 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Kevin Fall. 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #ifndef lint 36 static const char copyright[] = 37 "@(#) Copyright (c) 1989, 1993\n\ 38 The Regents of the University of California. All rights reserved.\n"; 39 #endif /* not lint */ 40 41 #ifndef lint 42 #if 0 43 static char sccsid[] = "@(#)mknod.c 8.1 (Berkeley) 6/5/93"; 44 #endif 45 static const char rcsid[] = 46 "$FreeBSD$"; 47 #endif /* not lint */ 48 49 #include <sys/types.h> 50 #include <sys/stat.h> 51 52 #include <err.h> 53 #include <errno.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <unistd.h> 57 #include <grp.h> 58 #include <pwd.h> 59 #include <string.h> 60 61 static void 62 usage(void) 63 { 64 65 (void)fprintf(stderr, 66 "usage: mknod name\n" 67 " mknod name [b | c] major minor [owner:group]\n"); 68 exit(1); 69 } 70 71 static u_long 72 id(const char *name, const char *type) 73 { 74 u_long val; 75 char *ep; 76 77 /* 78 * XXX 79 * We know that uid_t's and gid_t's are unsigned longs. 80 */ 81 errno = 0; 82 val = strtoul(name, &ep, 10); 83 if (errno) 84 err(1, "%s", name); 85 if (*ep != '\0') 86 errx(1, "%s: illegal %s name", name, type); 87 return (val); 88 } 89 90 static gid_t 91 a_gid(const char *s) 92 { 93 struct group *gr; 94 95 if (*s == '\0') /* Argument was "uid[:.]". */ 96 errx(1, "group must be specified when the owner is"); 97 return ((gr = getgrnam(s)) == NULL) ? id(s, "group") : gr->gr_gid; 98 } 99 100 static uid_t 101 a_uid(const char *s) 102 { 103 struct passwd *pw; 104 105 if (*s == '\0') /* Argument was "[:.]gid". */ 106 errx(1, "owner must be specified when the group is"); 107 return ((pw = getpwnam(s)) == NULL) ? id(s, "user") : pw->pw_uid; 108 } 109 110 int 111 main(int argc, char **argv) 112 { 113 int range_error; 114 uid_t uid; 115 gid_t gid; 116 mode_t mode; 117 dev_t dev; 118 char *cp, *endp; 119 long mymajor, myminor; 120 121 if (argc != 2 && argc != 5 && argc != 6) 122 usage(); 123 124 if (argc >= 5) { 125 mode = 0666; 126 if (argv[2][0] == 'c') 127 mode |= S_IFCHR; 128 else if (argv[2][0] == 'b') 129 mode |= S_IFBLK; 130 else 131 errx(1, "node must be type 'b' or 'c'"); 132 133 errno = 0; 134 mymajor = (long)strtoul(argv[3], &endp, 0); 135 if (endp == argv[3] || *endp != '\0') 136 errx(1, "%s: non-numeric major number", argv[3]); 137 range_error = errno; 138 errno = 0; 139 myminor = (long)strtoul(argv[4], &endp, 0); 140 if (endp == argv[4] || *endp != '\0') 141 errx(1, "%s: non-numeric minor number", argv[4]); 142 range_error |= errno; 143 dev = makedev(mymajor, myminor); 144 if (range_error || major(dev) != mymajor || 145 (long)(u_int)minor(dev) != myminor) 146 errx(1, "major or minor number too large"); 147 } else { 148 mode = 0666 | S_IFCHR; 149 dev = 0; 150 } 151 152 uid = gid = -1; 153 if (6 == argc) { 154 /* have owner:group */ 155 if ((cp = strchr(argv[5], ':')) != NULL) { 156 *cp++ = '\0'; 157 gid = a_gid(cp); 158 } else 159 usage(); 160 uid = a_uid(argv[5]); 161 } 162 163 if (mknod(argv[1], mode, dev) != 0) 164 err(1, "%s", argv[1]); 165 if (6 == argc) 166 if (chown(argv[1], uid, gid)) 167 err(1, "setting ownership on %s", argv[1]); 168 exit(0); 169 } 170