1 /* Copyright (C) 1997, 1998, 1999, 2002, 2007 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
28 #define MAXIPRINT (11) /* max length of printed integer */
29 static const char OPSYS[] = "unix";
32 user2netname (char netname[MAXNETNAMELEN + 1], const uid_t uid,
35 char dfltdom[MAXNETNAMELEN + 1];
40 if (getdomainname (dfltdom, sizeof (dfltdom)) < 0)
45 strncpy (dfltdom, domain, MAXNETNAMELEN);
46 dfltdom[MAXNETNAMELEN] = '\0';
49 if ((strlen (dfltdom) + OPSYS_LEN + 3 + MAXIPRINT) > (size_t) MAXNETNAMELEN)
52 sprintf (netname, "%s.%d@%s", OPSYS, uid, dfltdom);
54 if (netname[i - 1] == '.')
55 netname[i - 1] = '\0';
58 libc_hidden_def (user2netname)
61 host2netname (char netname[MAXNETNAMELEN + 1], const char *host,
65 char hostname[MAXHOSTNAMELEN + 1];
66 char domainname[MAXHOSTNAMELEN + 1];
70 netname[0] = '\0'; /* make null first (no need for memset) */
73 __gethostname (hostname, MAXHOSTNAMELEN);
76 strncpy (hostname, host, MAXHOSTNAMELEN);
77 hostname[MAXHOSTNAMELEN] = '\0';
80 dot_in_host = strchr (hostname, '.');
87 strncpy (domainname, p, MAXHOSTNAMELEN);
88 domainname[MAXHOSTNAMELEN] = '\0';
93 getdomainname (domainname, MAXHOSTNAMELEN);
98 strncpy (domainname, domain, MAXHOSTNAMELEN);
99 domainname[MAXHOSTNAMELEN] = '\0';
102 i = strlen (domainname);
106 if (domainname[i - 1] == '.')
107 domainname[i - 1] = 0;
109 if (dot_in_host) /* strip off rest of name */
112 if ((strlen (domainname) + strlen (hostname) + OPSYS_LEN + 3)
116 sprintf (netname, "%s.%s@%s", OPSYS, hostname, domainname);
119 libc_hidden_def (host2netname)
122 getnetname (char name[MAXNETNAMELEN + 1])
129 dummy = host2netname (name, NULL, NULL);
131 dummy = user2netname (name, uid, NULL);
134 libc_hidden_def (getnetname)
136 /* Type of the lookup function for netname2user. */
137 typedef int (*netname2user_function) (const char netname[MAXNETNAMELEN + 1],
138 uid_t *, gid_t *, int *, gid_t *);
139 /* The lookup function for the first entry of this service. */
140 extern int __nss_publickey_lookup (service_user ** nip, const char *name,
141 void **fctp) internal_function;
144 netname2user (const char netname[MAXNETNAMELEN + 1], uid_t * uidp, gid_t * gidp,
145 int *gidlenp, gid_t * gidlist)
147 static service_user *startp;
148 static netname2user_function start_fct;
152 netname2user_function f;
155 enum nss_status status = NSS_STATUS_UNAVAIL;
160 no_more = __nss_publickey_lookup (&nip, "netname2user", &fct.ptr);
162 startp = (service_user *) - 1;
172 no_more = (nip = startp) == (service_user *) - 1;
177 status = (*fct.f) (netname, uidp, gidp, gidlenp, gidlist);
179 no_more = __nss_next2 (&nip, "netname2user", NULL, &fct.ptr, status, 0);
182 return status == NSS_STATUS_SUCCESS;
184 libc_hidden_def (netname2user)
187 netname2host (const char netname[MAXNETNAMELEN + 1], char *hostname,
191 char buffer[MAXNETNAMELEN + 1];
193 p1 = strchr (buffer, '.');
198 p2 = strchr (p1, '@');
203 if (hostlen > MAXNETNAMELEN)
206 strncpy (hostname, p1, hostlen);
207 hostname[hostlen] = '\0';