/* Copyright (C) 1996-2018 Free Software Foundation, Inc.

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This file is part of the GNU C Library.

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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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/* All data returned by the network data base library are supplied in

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host order and returned in network order (suitable for use in

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system calls). */

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#ifndef _NETDB_H

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#define _NETDB_H 1

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#include <features.h>

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#include <netinet/in.h>

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#include <bits/stdint-uintn.h>

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#ifdef __USE_MISC

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/* This is necessary to make this include file properly replace the

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Sun version. */

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# include <rpc/netdb.h>

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#endif

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#ifdef __USE_GNU

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# include <bits/types/sigevent_t.h>

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# include <bits/types/struct_timespec.h>

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#endif

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#include <bits/netdb.h>

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/* Absolute file name for network data base files. */

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#define _PATH_HEQUIV "/etc/hosts.equiv"

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#define _PATH_HOSTS "/etc/hosts"

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#define _PATH_NETWORKS "/etc/networks"

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#define _PATH_NSSWITCH_CONF "/etc/nsswitch.conf"

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#define _PATH_PROTOCOLS "/etc/protocols"

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#define _PATH_SERVICES "/etc/services"

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__BEGIN_DECLS

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#if defined __USE_MISC || !defined __USE_XOPEN2K8

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/* Error status for non-reentrant lookup functions.

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We use a macro to access always the thread-specific `h_errno' variable. */

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# define h_errno (*__h_errno_location ())

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/* Function to get address of global `h_errno' variable. */

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extern int *__h_errno_location (void) __THROW __attribute__ ((__const__));

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/* Possible values left in `h_errno'. */

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# define HOST_NOT_FOUND 1 /* Authoritative Answer Host not found. */

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# define TRY_AGAIN 2 /* Non-Authoritative Host not found,

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or SERVERFAIL. */

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# define NO_RECOVERY 3 /* Non recoverable errors, FORMERR, REFUSED,

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NOTIMP. */

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# define NO_DATA 4 /* Valid name, no data record of requested

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type. */

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#endif

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#ifdef __USE_MISC

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# define NETDB_INTERNAL -1 /* See errno. */

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# define NETDB_SUCCESS 0 /* No problem. */

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# define NO_ADDRESS NO_DATA /* No address, look for MX record. */

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#endif

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#if defined __USE_XOPEN2K || defined __USE_XOPEN_EXTENDED

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/* Highest reserved Internet port number. */

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# define IPPORT_RESERVED 1024

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#endif

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#ifdef __USE_GNU

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/* Scope delimiter for getaddrinfo(), getnameinfo(). */

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# define SCOPE_DELIMITER '%'

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#endif

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#ifdef __USE_MISC

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/* Print error indicated by `h_errno' variable on standard error. STR

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if non-null is printed before the error string. */

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extern void herror (const char *__str) __THROW;

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/* Return string associated with error ERR_NUM. */

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extern const char *hstrerror (int __err_num) __THROW;

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#endif

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/* Description of data base entry for a single host. */

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struct hostent

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{

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char *h_name; /* Official name of host. */

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char **h_aliases; /* Alias list. */

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int h_addrtype; /* Host address type. */

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int h_length; /* Length of address. */

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char **h_addr_list; /* List of addresses from name server. */

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#ifdef __USE_MISC

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# define h_addr h_addr_list[0] /* Address, for backward compatibility.*/

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#endif

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};

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/* Open host data base files and mark them as staying open even after

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a later search if STAY_OPEN is non-zero.

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This function is a possible cancellation point and therefore not

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marked with __THROW. */

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extern void sethostent (int __stay_open);

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/* Close host data base files and clear `stay open' flag.

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This function is a possible cancellation point and therefore not

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marked with __THROW. */

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extern void endhostent (void);

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/* Get next entry from host data base file. Open data base if

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necessary.

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This function is a possible cancellation point and therefore not

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marked with __THROW. */

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extern struct hostent *gethostent (void);

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/* Return entry from host data base which address match ADDR with

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length LEN and type TYPE.

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This function is a possible cancellation point and therefore not

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marked with __THROW. */

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extern struct hostent *gethostbyaddr (const void *__addr, __socklen_t __len,

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int __type);

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/* Return entry from host data base for host with NAME.

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This function is a possible cancellation point and therefore not

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marked with __THROW. */

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extern struct hostent *gethostbyname (const char *__name);

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#ifdef __USE_MISC

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/* Return entry from host data base for host with NAME. AF must be

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set to the address type which is `AF_INET' for IPv4 or `AF_INET6'

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for IPv6.

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This function is not part of POSIX and therefore no official

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cancellation point. But due to similarity with an POSIX interface

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or due to the implementation it is a cancellation point and

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therefore not marked with __THROW. */

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extern struct hostent *gethostbyname2 (const char *__name, int __af);

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/* Reentrant versions of the functions above. The additional

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arguments specify a buffer of BUFLEN starting at BUF. The last

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argument is a pointer to a variable which gets the value which

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would be stored in the global variable `herrno' by the

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non-reentrant functions.

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These functions are not part of POSIX and therefore no official

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cancellation point. But due to similarity with an POSIX interface

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or due to the implementation they are cancellation points and

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therefore not marked with __THROW. */

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extern int gethostent_r (struct hostent *__restrict __result_buf,

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char *__restrict __buf, size_t __buflen,

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struct hostent **__restrict __result,

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int *__restrict __h_errnop);

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extern int gethostbyaddr_r (const void *__restrict __addr, __socklen_t __len,

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int __type,

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struct hostent *__restrict __result_buf,

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char *__restrict __buf, size_t __buflen,

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struct hostent **__restrict __result,

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int *__restrict __h_errnop);

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extern int gethostbyname_r (const char *__restrict __name,

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struct hostent *__restrict __result_buf,

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char *__restrict __buf, size_t __buflen,

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struct hostent **__restrict __result,

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int *__restrict __h_errnop);

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extern int gethostbyname2_r (const char *__restrict __name, int __af,

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struct hostent *__restrict __result_buf,

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char *__restrict __buf, size_t __buflen,

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struct hostent **__restrict __result,

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int *__restrict __h_errnop);

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#endif /* misc */

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/* Open network data base files and mark them as staying open even

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after a later search if STAY_OPEN is non-zero.

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This function is a possible cancellation point and therefore not

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marked with __THROW. */

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extern void setnetent (int __stay_open);

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/* Close network data base files and clear `stay open' flag.

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This function is a possible cancellation point and therefore not

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marked with __THROW. */

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extern void endnetent (void);

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/* Get next entry from network data base file. Open data base if

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necessary.

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This function is a possible cancellation point and therefore not

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marked with __THROW. */

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extern struct netent *getnetent (void);

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/* Return entry from network data base which address match NET and

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type TYPE.

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This function is a possible cancellation point and therefore not

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marked with __THROW. */

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extern struct netent *getnetbyaddr (uint32_t __net, int __type);

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/* Return entry from network data base for network with NAME.

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This function is a possible cancellation point and therefore not

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marked with __THROW. */

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extern struct netent *getnetbyname (const char *__name);

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#ifdef __USE_MISC

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/* Reentrant versions of the functions above. The additional

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arguments specify a buffer of BUFLEN starting at BUF. The last

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argument is a pointer to a variable which gets the value which

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would be stored in the global variable `herrno' by the

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non-reentrant functions.

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These functions are not part of POSIX and therefore no official

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cancellation point. But due to similarity with an POSIX interface

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or due to the implementation they are cancellation points and

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therefore not marked with __THROW. */

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extern int getnetent_r (struct netent *__restrict __result_buf,

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char *__restrict __buf, size_t __buflen,

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struct netent **__restrict __result,

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int *__restrict __h_errnop);

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extern int getnetbyaddr_r (uint32_t __net, int __type,

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struct netent *__restrict __result_buf,

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char *__restrict __buf, size_t __buflen,

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struct netent **__restrict __result,

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int *__restrict __h_errnop);

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extern int getnetbyname_r (const char *__restrict __name,

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struct netent *__restrict __result_buf,

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char *__restrict __buf, size_t __buflen,

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struct netent **__restrict __result,

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int *__restrict __h_errnop);

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#endif /* misc */

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/* Description of data base entry for a single service. */

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struct servent

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{

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char *s_name; /* Official service name. */

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char **s_aliases; /* Alias list. */

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int s_port; /* Port number. */

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char *s_proto; /* Protocol to use. */

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};

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/* Open service data base files and mark them as staying open even

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after a later search if STAY_OPEN is non-zero.

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This function is a possible cancellation point and therefore not

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marked with __THROW. */

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extern void setservent (int __stay_open);

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/* Close service data base files and clear `stay open' flag.

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This function is a possible cancellation point and therefore not

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marked with __THROW. */

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extern void endservent (void);

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/* Get next entry from service data base file. Open data base if

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necessary.

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This function is a possible cancellation point and therefore not

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marked with __THROW. */

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extern struct servent *getservent (void);

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/* Return entry from network data base for network with NAME and

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protocol PROTO.

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This function is a possible cancellation point and therefore not

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marked with __THROW. */

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extern struct servent *getservbyname (const char *__name, const char *__proto);

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/* Return entry from service data base which matches port PORT and

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protocol PROTO.

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This function is a possible cancellation point and therefore not

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marked with __THROW. */

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extern struct servent *getservbyport (int __port, const char *__proto);

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#ifdef __USE_MISC

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/* Reentrant versions of the functions above. The additional

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arguments specify a buffer of BUFLEN starting at BUF.

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These functions are not part of POSIX and therefore no official

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cancellation point. But due to similarity with an POSIX interface

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or due to the implementation they are cancellation points and

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therefore not marked with __THROW. */

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extern int getservent_r (struct servent *__restrict __result_buf,

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char *__restrict __buf, size_t __buflen,

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struct servent **__restrict __result);

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extern int getservbyname_r (const char *__restrict __name,

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const char *__restrict __proto,

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struct servent *__restrict __result_buf,

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char *__restrict __buf, size_t __buflen,

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struct servent **__restrict __result);

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extern int getservbyport_r (int __port, const char *__restrict __proto,

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struct servent *__restrict __result_buf,

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char *__restrict __buf, size_t __buflen,

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struct servent **__restrict __result);

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#endif /* misc */

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/* Description of data base entry for a single service. */

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struct protoent

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{

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char *p_name; /* Official protocol name. */

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char **p_aliases; /* Alias list. */

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int p_proto; /* Protocol number. */

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};

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/* Open protocol data base files and mark them as staying open even

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after a later search if STAY_OPEN is non-zero.

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This function is a possible cancellation point and therefore not

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marked with __THROW. */

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extern void setprotoent (int __stay_open);

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/* Close protocol data base files and clear `stay open' flag.

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This function is a possible cancellation point and therefore not

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marked with __THROW. */

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extern void endprotoent (void);

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/* Get next entry from protocol data base file. Open data base if

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necessary.

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This function is a possible cancellation point and therefore not

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marked with __THROW. */

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extern struct protoent *getprotoent (void);

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/* Return entry from protocol data base for network with NAME.

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This function is a possible cancellation point and therefore not

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marked with __THROW. */

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extern struct protoent *getprotobyname (const char *__name);

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/* Return entry from protocol data base which number is PROTO.

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This function is a possible cancellation point and therefore not

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marked with __THROW. */

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extern struct protoent *getprotobynumber (int __proto);

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#ifdef __USE_MISC

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/* Reentrant versions of the functions above. The additional

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arguments specify a buffer of BUFLEN starting at BUF.

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These functions are not part of POSIX and therefore no official

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cancellation point. But due to similarity with an POSIX interface

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or due to the implementation they are cancellation points and

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therefore not marked with __THROW. */

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extern int getprotoent_r (struct protoent *__restrict __result_buf,

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char *__restrict __buf, size_t __buflen,

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struct protoent **__restrict __result);

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extern int getprotobyname_r (const char *__restrict __name,

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struct protoent *__restrict __result_buf,

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char *__restrict __buf, size_t __buflen,

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struct protoent **__restrict __result);

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extern int getprotobynumber_r (int __proto,

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struct protoent *__restrict __result_buf,

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char *__restrict __buf, size_t __buflen,

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struct protoent **__restrict __result);

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/* Establish network group NETGROUP for enumeration.

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This function is not part of POSIX and therefore no official

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cancellation point. But due to similarity with an POSIX interface

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or due to the implementation it is a cancellation point and

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therefore not marked with __THROW. */

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extern int setnetgrent (const char *__netgroup);

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/* Free all space allocated by previous `setnetgrent' call.

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This function is not part of POSIX and therefore no official

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cancellation point. But due to similarity with an POSIX interface

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or due to the implementation it is a cancellation point and

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therefore not marked with __THROW. */

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extern void endnetgrent (void);

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/* Get next member of netgroup established by last `setnetgrent' call

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and return pointers to elements in HOSTP, USERP, and DOMAINP.

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This function is not part of POSIX and therefore no official

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cancellation point. But due to similarity with an POSIX interface

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or due to the implementation it is a cancellation point and

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therefore not marked with __THROW. */

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extern int getnetgrent (char **__restrict __hostp,

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char **__restrict __userp,

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char **__restrict __domainp);

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/* Test whether NETGROUP contains the triple (HOST,USER,DOMAIN).

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This function is not part of POSIX and therefore no official

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cancellation point. But due to similarity with an POSIX interface

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or due to the implementation it is a cancellation point and

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therefore not marked with __THROW. */

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extern int innetgr (const char *__netgroup, const char *__host,

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const char *__user, const char *__domain);

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/* Reentrant version of `getnetgrent' where result is placed in BUFFER.

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This function is not part of POSIX and therefore no official

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cancellation point. But due to similarity with an POSIX interface

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or due to the implementation it is a cancellation point and

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therefore not marked with __THROW. */

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extern int getnetgrent_r (char **__restrict __hostp,

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char **__restrict __userp,

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char **__restrict __domainp,

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char *__restrict __buffer, size_t __buflen);

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#endif /* misc */

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#ifdef __USE_MISC

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/* Call `rshd' at port RPORT on remote machine *AHOST to execute CMD.

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The local user is LOCUSER, on the remote machine the command is

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executed as REMUSER. In *FD2P the descriptor to the socket for the

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connection is returned. The caller must have the right to use a

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reserved port. When the function returns *AHOST contains the

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official host name.

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This function is not part of POSIX and therefore no official

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cancellation point. But due to similarity with an POSIX interface

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or due to the implementation it is a cancellation point and

[446] Fix | Delete

therefore not marked with __THROW. */

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extern int rcmd (char **__restrict __ahost, unsigned short int __rport,

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const char *__restrict __locuser,

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const char *__restrict __remuser,

[450] Fix | Delete

const char *__restrict __cmd, int *__restrict __fd2p);

[451] Fix | Delete

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/* This is the equivalent function where the protocol can be selected

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and which therefore can be used for IPv6.

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[455] Fix | Delete

This function is not part of POSIX and therefore no official

[456] Fix | Delete

cancellation point. But due to similarity with an POSIX interface

[457] Fix | Delete

or due to the implementation it is a cancellation point and

[458] Fix | Delete

therefore not marked with __THROW. */

[459] Fix | Delete

extern int rcmd_af (char **__restrict __ahost, unsigned short int __rport,

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const char *__restrict __locuser,

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const char *__restrict __remuser,

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const char *__restrict __cmd, int *__restrict __fd2p,

[463] Fix | Delete

sa_family_t __af);

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[465] Fix | Delete

/* Call `rexecd' at port RPORT on remote machine *AHOST to execute

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CMD. The process runs at the remote machine using the ID of user

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NAME whose cleartext password is PASSWD. In *FD2P the descriptor

[468] Fix | Delete

to the socket for the connection is returned. When the function

[469] Fix | Delete

returns *AHOST contains the official host name.

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[471] Fix | Delete

This function is not part of POSIX and therefore no official

[472] Fix | Delete

cancellation point. But due to similarity with an POSIX interface

[473] Fix | Delete

or due to the implementation it is a cancellation point and

[474] Fix | Delete

therefore not marked with __THROW. */

[475] Fix | Delete

extern int rexec (char **__restrict __ahost, int __rport,

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const char *__restrict __name,

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const char *__restrict __pass,

[478] Fix | Delete

const char *__restrict __cmd, int *__restrict __fd2p);

[479] Fix | Delete

[480] Fix | Delete

/* This is the equivalent function where the protocol can be selected

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and which therefore can be used for IPv6.

[482] Fix | Delete

[483] Fix | Delete

This function is not part of POSIX and therefore no official

[484] Fix | Delete

cancellation point. But due to similarity with an POSIX interface

[485] Fix | Delete

or due to the implementation it is a cancellation point and

[486] Fix | Delete

therefore not marked with __THROW. */

[487] Fix | Delete

extern int rexec_af (char **__restrict __ahost, int __rport,

[488] Fix | Delete

const char *__restrict __name,

[489] Fix | Delete

const char *__restrict __pass,

[490] Fix | Delete

const char *__restrict __cmd, int *__restrict __fd2p,

[491] Fix | Delete

sa_family_t __af);

[492] Fix | Delete

[493] Fix | Delete

/* Check whether user REMUSER on system RHOST is allowed to login as LOCUSER.

[494] Fix | Delete

If SUSER is not zero the user tries to become superuser. Return 0 if

[495] Fix | Delete

it is possible.

[496] Fix | Delete

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This function is not part of POSIX and therefore no official

[498] Fix | Delete

cancellation point. But due to similarity with an POSIX interface

[499] Fix | Delete