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 (c) 1993-1994, by Sun Microsystems, Inc.
24 */
25
26 /*
27 * This program replicates the function of the links from a machine name
28 * (such as sun4c) through /usr/kvm to true or false as appropriate. It
29 * knows the correct special cases.
30 *
31 * IMPORTANT NOTE:
32 *
33 * Do not modify this program to know about additional special cases or
34 * reflect new platforms or instruction set architectures. This is a
35 * deprecated interface and strictly for backwards compatibility. This
36 * is psarc/1992/171. Note the following excerpt from the opinion:
37 *
38 * It is most important to note that the manual page states in
39 * the NOTES section: "The machid family of commands is
40 * obsolete. Use uname -p and uname -m instead."
41 *
42 * The intent of Kernel Architecture Project team is to provide
43 * only enough functionality to mimic the existing definitions
44 * on the SPARC and Intel x86 versions of Solaris 2.x. No new
45 * identifiers will ever be added to the documented and
46 * undocumented identifiers listed above.
47 */
48
49 #pragma ident "%Z%%M% %I% %E% SMI"
50
51 #include <errno.h>
52 #include <stdlib.h>
53 #include <stdio.h>
54 #include <string.h>
55 #include <limits.h>
56 #include <sys/systeminfo.h>
57
58 static char static_buf[SYS_NMLN];
59 static char *progname;
60
61 static void get_info_item(int command, char **buf, long *count);
62
63 /* ARGSUSED */
64 int
65 main(int argc, char *argv[], char *envp[])
66 {
67 char *buf = &static_buf[0];
68 long buflen = SYS_NMLN;
69
70 if ((progname = strrchr(argv[0], '/')) == NULL)
71 progname = argv[0];
72 else
73 progname++;
74
75 /*
76 * First possible match is on the processor type.
77 *
78 * Special case for architectures: i386 matches i486 and visa versa.
79 */
80 get_info_item(SI_ARCHITECTURE, &buf, &buflen);
81 if (strcmp(buf, progname) == 0)
82 return (0);
83 if ((strcmp(buf, "i386") == 0 && strcmp(progname, "i486") == 0) ||
84 (strcmp(buf, "i486") == 0 && strcmp(progname, "i386") == 0))
85 return (0);
86
87 /*
88 * Next possible match is the machine, or more exactly, the value
89 * which would be returned by uname(2) in the machine field or uname(1)
90 * with the -m option. For historical reasons this is really is
91 * often a class of platforms which are identical to userland processes
92 * such as sun4c, sun4m, etc.
93 */
94 get_info_item(SI_MACHINE, &buf, &buflen);
95 if (strcmp(buf, progname) == 0)
96 return (0);
97
98 /*
99 * Finally, match the vendor. We hardwire in one historical match.
100 */
101 get_info_item(SI_HW_PROVIDER, &buf, &buflen);
102 if (strcmp(buf, progname) == 0)
103 return (0);
104 if (strcasecmp(buf, "Sun_Microsystems") == 0 &&
105 strcmp("sun", progname) == 0)
106 return (0);
107
108 return (255);
109 }
110
111 /*
112 * get_info_item is a wrapper around the sysinfo system call. It makes sure
113 * the buffer is large enough, returning a larger buffer if needed. On
114 * unrecoverable error, it exits. An error message doesn't help and makes
115 * this tiny program link stdio and maybe deal with internationalization,
116 * so the best thing is to die silently. Note that the larger buffer is
117 * retained for later use. Reality is that the buffer will always be big
118 * enough, but this is coded to the spec rather than implementation.
119 */
120 static void
121 get_info_item(int command, char **buf, long *count)
122 {
123 long error;
124
125 error = sysinfo(command, *buf, *count);
126 if (error > *count) {
127 *count = error;
128 if (*buf != static_buf) {
129 free(*buf);
130 }
131 *buf = (char *) malloc(*count);
132 error = sysinfo(command, *buf, *count);
133 }
134
135 if (error == -1)
136 exit(-1);
137 }