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. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #ifndef lint 34 static const char copyright[] = 35 "@(#) Copyright (c) 1989, 1993\n\ 36 The Regents of the University of California. All rights reserved.\n"; 37 #endif /* not lint */ 38 39 #ifndef lint 40 #if 0 41 static char sccsid[] = "@(#)mknod.c 8.1 (Berkeley) 6/5/93"; 42 #endif 43 static const char rcsid[] = 44 "$FreeBSD$"; 45 #endif /* not lint */ 46 47 #include <sys/types.h> 48 #include <sys/stat.h> 49 50 #include <err.h> 51 #include <errno.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <unistd.h> 55 #include <grp.h> 56 #include <pwd.h> 57 #include <string.h> 58 59 static void 60 usage(void) 61 { 62 63 (void)fprintf(stderr, 64 "usage: mknod name\n" 65 " mknod name [b | c] major minor [owner:group]\n"); 66 exit(1); 67 } 68 69 static u_long 70 id(const char *name, const char *type) 71 { 72 u_long val; 73 char *ep; 74 75 /* 76 * XXX 77 * We know that uid_t's and gid_t's are unsigned longs. 78 */ 79 errno = 0; 80 val = strtoul(name, &ep, 10); 81 if (errno) 82 err(1, "%s", name); 83 if (*ep != '\0') 84 errx(1, "%s: illegal %s name", name, type); 85 return (val); 86 } 87 88 static gid_t 89 a_gid(const char *s) 90 { 91 struct group *gr; 92 93 if (*s == '\0') /* Argument was "uid[:.]". */ 94 errx(1, "group must be specified when the owner is"); 95 return ((gr = getgrnam(s)) == NULL) ? id(s, "group") : gr->gr_gid; 96 } 97 98 static uid_t 99 a_uid(const char *s) 100 { 101 struct passwd *pw; 102 103 if (*s == '\0') /* Argument was "[:.]gid". */ 104 errx(1, "owner must be specified when the group is"); 105 return ((pw = getpwnam(s)) == NULL) ? id(s, "user") : pw->pw_uid; 106 } 107 108 int 109 main(int argc, char **argv) 110 { 111 int range_error; 112 uid_t uid; 113 gid_t gid; 114 mode_t mode; 115 dev_t dev; 116 char *cp, *endp; 117 long mymajor, myminor; 118 119 if (argc != 2 && argc != 5 && argc != 6) 120 usage(); 121 122 if (argc >= 5) { 123 mode = 0666; 124 if (argv[2][0] == 'c') 125 mode |= S_IFCHR; 126 else if (argv[2][0] == 'b') 127 mode |= S_IFBLK; 128 else 129 errx(1, "node must be type 'b' or 'c'"); 130 131 errno = 0; 132 mymajor = (long)strtoul(argv[3], &endp, 0); 133 if (endp == argv[3] || *endp != '\0') 134 errx(1, "%s: non-numeric major number", argv[3]); 135 range_error = errno; 136 errno = 0; 137 myminor = (long)strtoul(argv[4], &endp, 0); 138 if (endp == argv[4] || *endp != '\0') 139 errx(1, "%s: non-numeric minor number", argv[4]); 140 range_error |= errno; 141 dev = makedev(mymajor, myminor); 142 if (range_error || major(dev) != mymajor || 143 (long)(u_int)minor(dev) != myminor) 144 errx(1, "major or minor number too large"); 145 } else { 146 mode = 0666 | S_IFCHR; 147 dev = 0; 148 } 149 150 uid = gid = -1; 151 if (6 == argc) { 152 /* have owner:group */ 153 if ((cp = strchr(argv[5], ':')) != NULL) { 154 *cp++ = '\0'; 155 gid = a_gid(cp); 156 } else 157 usage(); 158 uid = a_uid(argv[5]); 159 } 160 161 if (mknod(argv[1], mode, dev) != 0) 162 err(1, "%s", argv[1]); 163 if (6 == argc) 164 if (chown(argv[1], uid, gid)) 165 err(1, "setting ownership on %s", argv[1]); 166 exit(0); 167 } 168