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 * 4. 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 [b | c] major minor [owner:group]\n"); 65 exit(1); 66 } 67 68 static u_long 69 id(const char *name, const char *type) 70 { 71 u_long val; 72 char *ep; 73 74 /* 75 * XXX 76 * We know that uid_t's and gid_t's are unsigned longs. 77 */ 78 errno = 0; 79 val = strtoul(name, &ep, 10); 80 if (errno) 81 err(1, "%s", name); 82 if (*ep != '\0') 83 errx(1, "%s: illegal %s name", name, type); 84 return (val); 85 } 86 87 static gid_t 88 a_gid(const char *s) 89 { 90 struct group *gr; 91 92 if (*s == '\0') /* Argument was "uid[:.]". */ 93 errx(1, "group must be specified when the owner is"); 94 return ((gr = getgrnam(s)) == NULL) ? id(s, "group") : gr->gr_gid; 95 } 96 97 static uid_t 98 a_uid(const char *s) 99 { 100 struct passwd *pw; 101 102 if (*s == '\0') /* Argument was "[:.]gid". */ 103 errx(1, "owner must be specified when the group is"); 104 return ((pw = getpwnam(s)) == NULL) ? id(s, "user") : pw->pw_uid; 105 } 106 107 int 108 main(int argc, char **argv) 109 { 110 int range_error; 111 uid_t uid; 112 gid_t gid; 113 mode_t mode; 114 dev_t dev; 115 char *cp, *endp; 116 long mymajor, myminor; 117 118 if (argc != 5 && argc != 6) 119 usage(); 120 121 mode = 0666; 122 if (argv[2][0] == 'c') 123 mode |= S_IFCHR; 124 else if (argv[2][0] == 'b') 125 mode |= S_IFBLK; 126 else 127 errx(1, "node must be type 'b' or 'c'"); 128 129 errno = 0; 130 mymajor = (long)strtoul(argv[3], &endp, 0); 131 if (endp == argv[3] || *endp != '\0') 132 errx(1, "%s: non-numeric major number", argv[3]); 133 range_error = errno; 134 errno = 0; 135 myminor = (long)strtoul(argv[4], &endp, 0); 136 if (endp == argv[4] || *endp != '\0') 137 errx(1, "%s: non-numeric minor number", argv[4]); 138 range_error |= errno; 139 dev = makedev(mymajor, myminor); 140 if (range_error || major(dev) != (u_int) mymajor || 141 (long)(u_int)minor(dev) != myminor) 142 errx(1, "major or minor number too large"); 143 144 uid = gid = -1; 145 if (6 == argc) { 146 /* have owner:group */ 147 if ((cp = strchr(argv[5], ':')) != NULL) { 148 *cp++ = '\0'; 149 gid = a_gid(cp); 150 } else 151 usage(); 152 uid = a_uid(argv[5]); 153 } 154 155 if (mknod(argv[1], mode, dev) != 0) 156 err(1, "%s", argv[1]); 157 if (6 == argc) 158 if (chown(argv[1], uid, gid)) 159 err(1, "setting ownership on %s", argv[1]); 160 exit(0); 161 } 162