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/* Copyright (C) 1997-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <rpc/rpc.h>
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#include <shlib-compat.h>
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#include "nsswitch.h"
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#define OPSYS_LEN 4
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#define MAXIPRINT (11) /* max length of printed integer */
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static const char OPSYS[] = "unix";
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int
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user2netname (char netname[MAXNETNAMELEN + 1], const uid_t uid,
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const char *domain)
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{
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char dfltdom[MAXNETNAMELEN + 1];
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size_t i;
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if (domain == NULL)
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{
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if (getdomainname (dfltdom, sizeof (dfltdom)) < 0)
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return 0;
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}
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else
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{
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strncpy (dfltdom, domain, MAXNETNAMELEN);
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dfltdom[MAXNETNAMELEN] = '\0';
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}
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if ((strlen (dfltdom) + OPSYS_LEN + 3 + MAXIPRINT) > (size_t) MAXNETNAMELEN)
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return 0;
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sprintf (netname, "%s.%d@%s", OPSYS, uid, dfltdom);
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i = strlen (netname);
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if (netname[i - 1] == '.')
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netname[i - 1] = '\0';
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return 1;
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}
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libc_hidden_nolink_sunrpc (user2netname, GLIBC_2_1)
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int
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host2netname (char netname[MAXNETNAMELEN + 1], const char *host,
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const char *domain)
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{
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char *p;
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char hostname[MAXHOSTNAMELEN + 1];
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char domainname[MAXHOSTNAMELEN + 1];
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char *dot_in_host;
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size_t i;
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netname[0] = '\0'; /* make null first (no need for memset) */
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if (host == NULL)
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__gethostname (hostname, MAXHOSTNAMELEN);
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else
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{
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strncpy (hostname, host, MAXHOSTNAMELEN);
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hostname[MAXHOSTNAMELEN] = '\0';
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}
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dot_in_host = strchr (hostname, '.');
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if (domain == NULL)
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{
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p = dot_in_host;
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if (p)
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{
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++p;
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strncpy (domainname, p, MAXHOSTNAMELEN);
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domainname[MAXHOSTNAMELEN] = '\0';
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}
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else
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{
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domainname[0] = 0;
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getdomainname (domainname, MAXHOSTNAMELEN);
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}
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}
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else
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{
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strncpy (domainname, domain, MAXHOSTNAMELEN);
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domainname[MAXHOSTNAMELEN] = '\0';
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}
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i = strlen (domainname);
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if (i == 0)
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/* No domainname */
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return 0;
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if (domainname[i - 1] == '.')
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domainname[i - 1] = 0;
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if (dot_in_host) /* strip off rest of name */
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*dot_in_host = '\0';
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if ((strlen (domainname) + strlen (hostname) + OPSYS_LEN + 3)
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> MAXNETNAMELEN)
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return 0;
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sprintf (netname, "%s.%s@%s", OPSYS, hostname, domainname);
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return 1;
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}
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#ifdef EXPORT_RPC_SYMBOLS
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libc_hidden_def (host2netname)
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#else
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libc_hidden_nolink_sunrpc (host2netname, GLIBC_2_1)
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#endif
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int
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getnetname (char name[MAXNETNAMELEN + 1])
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{
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uid_t uid;
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int dummy;
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uid = __geteuid ();
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if (uid == 0)
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dummy = host2netname (name, NULL, NULL);
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else
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dummy = user2netname (name, uid, NULL);
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return (dummy);
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}
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libc_hidden_nolink_sunrpc (getnetname, GLIBC_2_1)
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/* Type of the lookup function for netname2user. */
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typedef int (*netname2user_function) (const char netname[MAXNETNAMELEN + 1],
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uid_t *, gid_t *, int *, gid_t *);
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int
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netname2user (const char netname[MAXNETNAMELEN + 1], uid_t * uidp, gid_t * gidp,
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int *gidlenp, gid_t * gidlist)
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{
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static service_user *startp;
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static netname2user_function start_fct;
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service_user *nip;
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union
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{
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netname2user_function f;
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void *ptr;
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} fct;
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enum nss_status status = NSS_STATUS_UNAVAIL;
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int no_more;
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if (startp == NULL)
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{
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no_more = __nss_publickey_lookup2 (&nip, "netname2user", NULL, &fct.ptr);
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if (no_more)
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startp = (service_user *) - 1;
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else
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{
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startp = nip;
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start_fct = fct.f;
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}
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}
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else
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{
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fct.f = start_fct;
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no_more = (nip = startp) == (service_user *) - 1;
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}
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while (!no_more)
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{
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status = (*fct.f) (netname, uidp, gidp, gidlenp, gidlist);
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no_more = __nss_next2 (&nip, "netname2user", NULL, &fct.ptr, status, 0);
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}
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return status == NSS_STATUS_SUCCESS;
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}
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#ifdef EXPORT_RPC_SYMBOLS
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libc_hidden_def (netname2user)
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#else
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libc_hidden_nolink_sunrpc (netname2user, GLIBC_2_1)
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#endif
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int
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netname2host (const char netname[MAXNETNAMELEN + 1], char *hostname,
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const int hostlen)
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{
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char *p1, *p2;
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p1 = strchr (netname, '.');
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if (p1 == NULL)
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return 0;
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p1++;
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p2 = strchr (p1, '@');
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if (p2 == NULL)
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return 0;
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*p2 = '\0';
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if (hostlen > MAXNETNAMELEN)
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return 0;
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strncpy (hostname, p1, hostlen);
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hostname[hostlen] = '\0';
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return 1;
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}
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libc_hidden_nolink_sunrpc (netname2host, GLIBC_2_1)
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