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 #endif /* not lint */ 43 44 #include <sys/types.h> 45 #include <sys/stat.h> 46 47 #include <err.h> 48 #include <errno.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <unistd.h> 52 #include <grp.h> 53 #include <pwd.h> 54 #include <string.h> 55 56 static void 57 usage(void) 58 { 59 60 (void)fprintf(stderr, 61 "usage: mknod name\n" 62 " mknod name [b | c] major minor [owner:group]\n"); 63 exit(1); 64 } 65 66 static u_long 67 id(const char *name, const char *type) 68 { 69 u_long val; 70 char *ep; 71 72 /* 73 * XXX 74 * We know that uid_t's and gid_t's are unsigned longs. 75 */ 76 errno = 0; 77 val = strtoul(name, &ep, 10); 78 if (errno) 79 err(1, "%s", name); 80 if (*ep != '\0') 81 errx(1, "%s: illegal %s name", name, type); 82 return (val); 83 } 84 85 static gid_t 86 a_gid(const char *s) 87 { 88 struct group *gr; 89 90 if (*s == '\0') /* Argument was "uid[:.]". */ 91 errx(1, "group must be specified when the owner is"); 92 return ((gr = getgrnam(s)) == NULL) ? id(s, "group") : gr->gr_gid; 93 } 94 95 static uid_t 96 a_uid(const char *s) 97 { 98 struct passwd *pw; 99 100 if (*s == '\0') /* Argument was "[:.]gid". */ 101 errx(1, "owner must be specified when the group is"); 102 return ((pw = getpwnam(s)) == NULL) ? id(s, "user") : pw->pw_uid; 103 } 104 105 int 106 main(int argc, char **argv) 107 { 108 int range_error; 109 uid_t uid; 110 gid_t gid; 111 mode_t mode; 112 dev_t dev; 113 char *cp, *endp; 114 long mymajor, myminor; 115 116 if (argc != 2 && argc != 5 && argc != 6) 117 usage(); 118 119 if (argc >= 5) { 120 mode = 0666; 121 if (argv[2][0] == 'c') 122 mode |= S_IFCHR; 123 else if (argv[2][0] == 'b') 124 mode |= S_IFBLK; 125 else 126 errx(1, "node must be type 'b' or 'c'"); 127 128 errno = 0; 129 mymajor = (long)strtoul(argv[3], &endp, 0); 130 if (endp == argv[3] || *endp != '\0') 131 errx(1, "%s: non-numeric major number", argv[3]); 132 range_error = errno; 133 errno = 0; 134 myminor = (long)strtoul(argv[4], &endp, 0); 135 if (endp == argv[4] || *endp != '\0') 136 errx(1, "%s: non-numeric minor number", argv[4]); 137 range_error |= errno; 138 dev = makedev(mymajor, myminor); 139 if (range_error || major(dev) != mymajor || 140 (long)(u_int)minor(dev) != myminor) 141 errx(1, "major or minor number too large"); 142 } else { 143 mode = 0666 | S_IFCHR; 144 dev = 0; 145 } 146 147 uid = gid = -1; 148 if (6 == argc) { 149 /* have owner:group */ 150 if ((cp = strchr(argv[5], ':')) != NULL) { 151 *cp++ = '\0'; 152 gid = a_gid(cp); 153 } else 154 usage(); 155 uid = a_uid(argv[5]); 156 } 157 158 if (mknod(argv[1], mode, dev) != 0) 159 err(1, "%s", argv[1]); 160 if (6 == argc) 161 if (chown(argv[1], uid, gid)) 162 err(1, "setting ownership on %s", argv[1]); 163 exit(0); 164 } 165