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Diffstat (limited to 'contrib/bind/man/gethostbyname.3')
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diff --git a/contrib/bind/man/gethostbyname.3 b/contrib/bind/man/gethostbyname.3 deleted file mode 100644 index 034904b..0000000 --- a/contrib/bind/man/gethostbyname.3 +++ /dev/null @@ -1,228 +0,0 @@ -.\" Copyright (c) 1983, 1987 The Regents of the University of California. -.\" All rights reserved. -.\" -.\" Redistribution and use in source and binary forms are permitted provided -.\" that: (1) source distributions retain this entire copyright notice and -.\" comment, and (2) distributions including binaries display the following -.\" acknowledgement: ``This product includes software developed by the -.\" University of California, Berkeley and its contributors'' in the -.\" documentation or other materials provided with the distribution and in -.\" all advertising materials mentioning features or use of this software. -.\" Neither the name of the University nor the names of its contributors may -.\" be used to endorse or promote products derived from this software without -.\" specific prior written permission. -.\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED -.\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF -.\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. -.\" -.\" @(#)gethostbyname.3 6.12 (Berkeley) 6/23/90 -.\" -.TH GETHOSTBYNAME @LIB_NETWORK_EXT_U@ "June 23, 1990" -.UC 5 -.SH NAME -gethostbyname, gethostbyaddr, gethostent, sethostent, endhostent, herror \- get network host entry -.SH SYNOPSIS -.B "#include <netdb.h> -.PP -.B "extern int h_errno; -.PP -.B "struct hostent *gethostbyname(name) -.br -.B "char *name; -.PP -.B "struct hostent *gethostbyname2(name, af) -.br -.B "char *name; int af; -.PP -.B "struct hostent *gethostbyaddr(addr, len, type) -.br -.B "char *addr; int len, type; -.PP -.B "struct hostent *gethostent() -.PP -.B "sethostent(stayopen) -.br -.B "int stayopen; -.PP -.B "endhostent() -.PP -.B "herror(string) -.br -.B "char *string; -.PP -.SH DESCRIPTION -.IR Gethostbyname , -.IR gethostbyname2 , -and -.I gethostbyaddr -each return a pointer to an object with the -following structure describing an internet host -referenced by name or by address, respectively. -This structure contains either the information obtained from the name server, -.IR @INDOT@named (@SYS_OPS_EXT@), -or broken-out fields from a line in -.IR /etc/hosts . -If the local name server is not running these routines do a lookup in -.IR /etc/hosts . -.RS -.PP -.nf -struct hostent { - char *h_name; /* official name of host */ - char **h_aliases; /* alias list */ - int h_addrtype; /* host address type */ - int h_length; /* length of address */ - char **h_addr_list; /* list of addresses from name server */ -}; -#define h_addr h_addr_list[0] /* address, for backward compatibility */ -.ft R -.ad -.fi -.RE -.PP -The members of this structure are: -.TP \w'h_addr_list'u+2n -h_name -Official name of the host. -.TP \w'h_addr_list'u+2n -h_aliases -A zero terminated array of alternate names for the host. -.TP \w'h_addr_list'u+2n -h_addrtype -The type of address being returned; usually AF_INET. -.TP \w'h_addr_list'u+2n -h_length -The length, in bytes, of the address. -.TP \w'h_addr_list'u+2n -h_addr_list -A zero terminated array of network addresses for the host. -Host addresses are returned in network byte order. -.TP \w'h_addr_list'u+2n -h_addr -The first address in h_addr_list; this is for backward compatibility. -.PP -When using the nameserver, -.I gethostbyname -will search for the named host in each parent domain given in the ``search'' -directive of -.IR resolv.conf (5) -unless the name contains a dot. -If the name contains no dot, and if the environment variable ``HOSTALAIASES'' -contains the name of an alias file, the alias file will first be searched -for an alias matching the input name. -See -.IR hostname (@DESC_EXT@) -for the domain search procedure and the alias file format. -.PP -.I Gethostbyname2 -is an evolution of -.I gethostbyname -intended to allow lookups in address families other than AF_INET, for example -AF_INET6. Currently the -.I af -argument must be specified as -.I AF_INET -else the function will return \s-2NULL\s+2 after having set -.I h_errno -to \s-2NETDB_INTERNAL\s+2. -.PP -.I Sethostent -may be used to request the use of a connected TCP socket for queries. -If the -.I stayopen -flag is non-zero, -this sets the option to send all queries to the name server using TCP -and to retain the connection after each call to -.I gethostbyname -or -.IR gethostbyaddr . -Otherwise, queries are performed using UDP datagrams. -.PP -.I Endhostent -closes the TCP connection. -.SH DIAGNOSTICS -.PP -Error return status from -.I gethostbyname -and -.I gethostbyaddr -is indicated by return of a null pointer. -The external integer -.IR h_errno -may then be checked to see whether this is a temporary failure -or an invalid or unknown host. -The routine -.I herror -can be used to print an error message describing the failure. -If its argument -.I string -is non-NULL, it is printed, followed by a colon and a space. -The error message is printed with a trailing newline. -.PP -.IR h_errno -can have the following values: -.RS -.IP NETDB_INTERNAL \w'HOST_NOT_FOUND'u+2n -This indicates an internal error in the library, unrelated to the network -or name service. -.I errno -will be valid in this case; see -.IR perror (3). -.IP HOST_NOT_FOUND \w'HOST_NOT_FOUND'u+2n -No such host is known. -.IP TRY_AGAIN \w'HOST_NOT_FOUND'u+2n -This is usually a temporary error -and means that the local server did not receive -a response from an authoritative server. -A retry at some later time may succeed. -.IP NO_RECOVERY \w'HOST_NOT_FOUND'u+2n -Some unexpected server failure was encountered. -This is a non-recoverable error. -.IP NO_DATA \w'HOST_NOT_FOUND'u+2n -The requested name is valid but does not have an IP address; -this is not a temporary error. -This means that the name is known to the name server but there is no address -associated with this name. -Another type of request to the name server using this domain name -will result in an answer; -for example, a mail-forwarder may be registered for this domain. -.RE -.SH FILES -/etc/hosts -.SH "SEE ALSO" -resolver(@LIB_NETWORK_EXT@), hosts(@FORMAT_EXT@), hostname(@DESC_EXT@), @INDOT@named(@SYS_OPS_EXT@) -.SH CAVEAT -.PP -.I Gethostent -is defined, and -.I sethostent -and -.I endhostent -are redefined, -when -.IR libc -is built to use only the routines to lookup in -.IR /etc/hosts -and not the name server. -.PP -.I Gethostent -reads the next line of -.IR /etc/hosts , -opening the file if necessary. -.PP -.I Sethostent -is redefined to open and rewind the file. If the -.I stayopen -argument is non-zero, -the hosts data base will not be closed after each call to -.I gethostbyname -or -.IR gethostbyaddr . -.I Endhostent -is redefined to close the file. -.SH BUGS -All information -is contained in a static area -so it must be copied if it is -to be saved. Only the Internet -address format is currently understood. |
