2 * Copyright (c) 2009, Sun Microsystems, Inc.
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13 * contributors may be used to endorse or promote products derived
14 * from this software without specific prior written permission.
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28 * $FreeBSD: src/lib/libc/rpc/netname.c,v 1.8 2004/10/16 06:11:35 obrien Exp $
30 * @(#)netname.c 1.8 91/03/11 Copyr 1986 Sun Micro
34 * netname utility routines
35 * convert from unix names to network names and vice-versa
36 * This module is operating system dependent!
37 * What we define here will work with any unix system that has adopted
38 * the sun NIS domain architecture.
41 #include "namespace.h"
42 #include <sys/param.h>
44 #include <rpc/rpc_com.h>
46 #include <rpcsvc/yp_prot.h>
47 #include <rpcsvc/ypclnt.h>
55 #include "un-namespace.h"
57 #ifndef MAXHOSTNAMELEN
58 #define MAXHOSTNAMELEN 256
64 #define TYPE_BIT(type) (sizeof (type) * CHAR_BIT)
67 ** 302 / 1000 is log10(2.0) rounded up.
68 ** Subtract one for the sign bit if the type is signed;
69 ** add one for integer division truncation;
70 ** add one more for a minus sign if the type is signed.
72 #define U_INT_STRLEN_MAXIMUM(type) \
73 (TYPE_BIT(type) * 302 / 1000 + 1)
74 #define S_INT_STRLEN_MAXIMUM(type) \
75 ((TYPE_BIT(type) - 1) * 302 / 1000 + 1 + 1)
77 static char *OPSYS = "unix";
80 * Figure out my fully qualified network name
83 getnetname(char *name)
89 return (host2netname(name, NULL, NULL));
91 return (user2netname(name, uid, NULL));
97 * Convert unix cred to network-name
100 user2netname(char *netname, const uid_t uid, const char *domain)
104 if (domain == NULL) {
105 if (__rpc_get_default_domain(&dfltdom) != 0) {
110 if (strlen(domain) + 1 + U_INT_STRLEN_MAXIMUM(u_long) + 1 + strlen(OPSYS) > MAXNETNAMELEN) {
113 sprintf(netname, "%s.%ld@%s", OPSYS, (u_long)uid, domain);
119 * Convert host to network-name
122 host2netname(char *netname, const char *host, const char *domain)
125 char hostname[MAXHOSTNAMELEN+1];
127 if (domain == NULL) {
128 if (__rpc_get_default_domain(&dfltdom) != 0) {
134 gethostname(hostname, sizeof(hostname));
137 if (strlen(domain) + 1 + strlen(host) + 1 + strlen(OPSYS) > MAXNETNAMELEN) {
140 sprintf(netname, "%s.%s@%s", OPSYS, host, domain);