1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
28 /* All Rights Reserved */
29
30 /* Copyright (c) 1987, 1988 Microsoft Corporation */
31 /* All Rights Reserved */
32
33 #pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.9 */
34
35 /*
36 * mknod - build special file
37 *
38 * mknod name [ b ] [ c ] major minor
39 * mknod name p (named pipe)
40 *
41 * MODIFICATION HISTORY
42 * M000 11 Apr 83 andyp 3.0 upgrade
43 * - (Mostly uncommented). Picked up 3.0 source.
44 * - Added header. Changed usage message. Replaced hard-coded
45 * makedev with one from <sys/types.h>.
46 * - Added mechanism for creating name space files.
47 * - Added some error checks.
48 * - Semi-major reorganition.
49 */
50
51 #include <sys/types.h>
52 #include <stdio.h>
53 #include <unistd.h>
54 #include <stdlib.h>
55 #include <errno.h>
56 #include <sys/stat.h>
57 #include <sys/mkdev.h>
58
59 #define ACC 0666
60
61 static int domk(const char *path, const mode_t mode, const dev_t arg);
62 static long number(const char *s);
63 static void usage(void);
64
65 int
main(int argc,char ** argv)66 main(int argc, char **argv)
67 {
68 mode_t mode;
69 dev_t arg;
70 major_t majno;
71 minor_t minno;
72
73 if (argc < 3 || argc > 5)
74 usage();
75
76 if (argv[2][1] != '\0')
77 usage();
78
79 if (argc == 3) {
80 switch (argv[2][0]) {
81 case 'p':
82 mode = S_IFIFO;
83 arg = 0; /* (not used) */
84 break;
85 default:
86 usage();
87 /* NO RETURN */
88 }
89 } else if (argc == 5) {
90 switch (argv[2][0]) {
91 case 'b':
92 mode = S_IFBLK;
93 break;
94 case 'c':
95 mode = S_IFCHR;
96 break;
97 default:
98 usage();
99 }
100 majno = (major_t)number(argv[3]);
101 if (majno == (major_t)-1 || majno > MAXMAJ) {
102 (void) fprintf(stderr, "mknod: invalid major number "
103 "'%s' - valid range is 0-%lu\n", argv[3], MAXMAJ);
104 return (2);
105 }
106 minno = (minor_t)number(argv[4]);
107 if (minno == (minor_t)-1 || minno > MAXMIN) {
108 (void) fprintf(stderr, "mknod: invalid minor number "
109 "'%s' - valid range is 0-%lu\n", argv[4], MAXMIN);
110 return (2);
111 }
112 arg = makedev(majno, minno);
113 } else
114 usage();
115
116 return (domk(argv[1], (mode | ACC), arg) ? 2 : 0);
117 }
118
119 static int
domk(const char * path,const mode_t mode,const dev_t arg)120 domk(const char *path, const mode_t mode, const dev_t arg)
121 {
122 int ec;
123
124 if ((ec = mknod(path, mode, arg)) == -1) {
125 perror("mknod");
126 } else {
127 /* chown() return deliberately ignored */
128 (void) chown(path, getuid(), getgid());
129 }
130 return (ec);
131 }
132
133 static long
number(const char * s)134 number(const char *s)
135 {
136 long n;
137
138 errno = 0;
139 n = strtol(s, NULL, 0);
140 if (errno != 0 || n < 0)
141 return (-1);
142 return (n);
143 }
144
145 static void
usage(void)146 usage(void)
147 {
148 (void) fprintf(stderr, "usage: mknod name [ b/c major minor ] [ p ]\n");
149 exit(2);
150 }
151