1 /* Copyright (C) 1997-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
22 #include <shlib-compat.h>
27 #define MAXIPRINT (11) /* max length of printed integer */
28 static const char OPSYS
[] = "unix";
31 user2netname (char netname
[MAXNETNAMELEN
+ 1], const uid_t uid
,
34 char dfltdom
[MAXNETNAMELEN
+ 1];
39 if (getdomainname (dfltdom
, sizeof (dfltdom
)) < 0)
44 strncpy (dfltdom
, domain
, MAXNETNAMELEN
);
45 dfltdom
[MAXNETNAMELEN
] = '\0';
48 if ((strlen (dfltdom
) + OPSYS_LEN
+ 3 + MAXIPRINT
) > (size_t) MAXNETNAMELEN
)
51 sprintf (netname
, "%s.%d@%s", OPSYS
, uid
, dfltdom
);
53 if (netname
[i
- 1] == '.')
54 netname
[i
- 1] = '\0';
57 libc_hidden_nolink_sunrpc (user2netname
, GLIBC_2_1
)
60 host2netname (char netname
[MAXNETNAMELEN
+ 1], const char *host
,
64 char hostname
[MAXHOSTNAMELEN
+ 1];
65 char domainname
[MAXHOSTNAMELEN
+ 1];
69 netname
[0] = '\0'; /* make null first (no need for memset) */
72 __gethostname (hostname
, MAXHOSTNAMELEN
);
75 strncpy (hostname
, host
, MAXHOSTNAMELEN
);
76 hostname
[MAXHOSTNAMELEN
] = '\0';
79 dot_in_host
= strchr (hostname
, '.');
86 strncpy (domainname
, p
, MAXHOSTNAMELEN
);
87 domainname
[MAXHOSTNAMELEN
] = '\0';
92 getdomainname (domainname
, MAXHOSTNAMELEN
);
97 strncpy (domainname
, domain
, MAXHOSTNAMELEN
);
98 domainname
[MAXHOSTNAMELEN
] = '\0';
101 i
= strlen (domainname
);
105 if (domainname
[i
- 1] == '.')
106 domainname
[i
- 1] = 0;
108 if (dot_in_host
) /* strip off rest of name */
111 if ((strlen (domainname
) + strlen (hostname
) + OPSYS_LEN
+ 3)
115 sprintf (netname
, "%s.%s@%s", OPSYS
, hostname
, domainname
);
118 #ifdef EXPORT_RPC_SYMBOLS
119 libc_hidden_def (host2netname
)
121 libc_hidden_nolink_sunrpc (host2netname
, GLIBC_2_1
)
125 getnetname (char name
[MAXNETNAMELEN
+ 1])
132 dummy
= host2netname (name
, NULL
, NULL
);
134 dummy
= user2netname (name
, uid
, NULL
);
137 libc_hidden_nolink_sunrpc (getnetname
, GLIBC_2_1
)
139 /* Type of the lookup function for netname2user. */
140 typedef int (*netname2user_function
) (const char netname
[MAXNETNAMELEN
+ 1],
141 uid_t
*, gid_t
*, int *, gid_t
*);
144 netname2user (const char *netname
, uid_t
* uidp
, gid_t
* gidp
,
145 int *gidlenp
, gid_t
* gidlist
)
150 netname2user_function f
;
153 enum nss_status status
= NSS_STATUS_UNAVAIL
;
156 no_more
= __nss_publickey_lookup2 (&nip
, "netname2user", NULL
, &fct
.ptr
);
160 status
= (*fct
.f
) (netname
, uidp
, gidp
, gidlenp
, gidlist
);
162 no_more
= __nss_next2 (&nip
, "netname2user", NULL
, &fct
.ptr
, status
, 0);
165 return status
== NSS_STATUS_SUCCESS
;
167 #ifdef EXPORT_RPC_SYMBOLS
168 libc_hidden_def (netname2user
)
170 libc_hidden_nolink_sunrpc (netname2user
, GLIBC_2_1
)
174 netname2host (const char *netname
, char *hostname
, const int hostlen
)
178 p1
= strchr (netname
, '.');
183 p2
= strchr (p1
, '@');
188 if (hostlen
> MAXNETNAMELEN
)
191 strncpy (hostname
, p1
, hostlen
);
192 hostname
[hostlen
] = '\0';
196 libc_hidden_nolink_sunrpc (netname2host
, GLIBC_2_1
)