2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2009, Sun Microsystems, Inc.
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8 * modification, are permitted provided that the following conditions are met:
9 * - Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
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15 * contributors may be used to endorse or promote products derived
16 * from this software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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28 * POSSIBILITY OF SUCH DAMAGE.
31 #if defined(LIBC_SCCS) && !defined(lint)
32 static char sccsid[] = "@(#)netname.c 1.8 91/03/11 Copyr 1986 Sun Micro";
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
38 * netname utility routines
39 * convert from unix names to network names and vice-versa
40 * This module is operating system dependent!
41 * What we define here will work with any unix system that has adopted
42 * the sun NIS domain architecture.
45 #include "namespace.h"
46 #include <sys/param.h>
48 #include <rpc/rpc_com.h>
50 #include <rpcsvc/yp_prot.h>
51 #include <rpcsvc/ypclnt.h>
59 #include "un-namespace.h"
61 #ifndef MAXHOSTNAMELEN
62 #define MAXHOSTNAMELEN 256
65 #define TYPE_BIT(type) (sizeof (type) * CHAR_BIT)
67 #define TYPE_SIGNED(type) (((type) -1) < 0)
70 ** 302 / 1000 is log10(2.0) rounded up.
71 ** Subtract one for the sign bit if the type is signed;
72 ** add one for integer division truncation;
73 ** add one more for a minus sign if the type is signed.
75 #define INT_STRLEN_MAXIMUM(type) \
76 ((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + 1 + TYPE_SIGNED(type))
78 static char *OPSYS = "unix";
81 * Figure out my fully qualified network name
84 getnetname(char name[MAXNETNAMELEN+1])
90 return (host2netname(name, (char *) NULL, (char *) NULL));
92 return (user2netname(name, uid, (char *) NULL));
98 * Convert unix cred to network-name
101 user2netname(char netname[MAXNETNAMELEN + 1], const uid_t uid, const char *domain)
105 if (domain == NULL) {
106 if (__rpc_get_default_domain(&dfltdom) != 0) {
111 if (strlen(domain) + 1 + INT_STRLEN_MAXIMUM(u_long) + 1 + strlen(OPSYS) > MAXNETNAMELEN) {
114 (void) sprintf(netname, "%s.%ld@%s", OPSYS, (u_long)uid, domain);
120 * Convert host to network-name
123 host2netname(char netname[MAXNETNAMELEN + 1], const char *host, const char *domain)
126 char hostname[MAXHOSTNAMELEN+1];
128 if (domain == NULL) {
129 if (__rpc_get_default_domain(&dfltdom) != 0) {
135 (void) gethostname(hostname, sizeof(hostname));
138 if (strlen(domain) + 1 + strlen(host) + 1 + strlen(OPSYS) > MAXNETNAMELEN) {
141 (void) sprintf(netname, "%s.%s@%s", OPSYS, host, domain);