Opens network host file.
Standard C Library (libc.a) (libbind) libnis) (liblocal)
#include <netdb.h> sethostent_r (StayOpenflag, ht_data) int StayOpenflag; struct hostent_data *ht_data;
When using the sethostent_r subroutine in DNS/BIND name service resolution, sethostent_r allows a request for the use of a connected socket using TCP for queries. If the StayOpen parameter 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 gethostbyname_r or gethostbyaddr_r.
When using the sethostent_r subroutine to search the /etc/hosts file, sethostent_r opens and rewinds the /etc/hosts file. If the StayOpen parameter is non-zero, the hosts database is not closed after each call to gethostbyname_r or gethostbyaddr_r. It internally runs the sethostent command.
| StayOpenflag | When used in NIS name resolution and to search the local /etc/hosts file, it contains a value used to indicate whether
to close the host file after each call to the gethostbyname and gethostbyaddr subroutines. A non-zero value
indicates not to close the host file after each call, and a zero value allows
the file to be closed.
When used in DNS/BIND name resolution, a non-zero value retains the TCP connection after each call to gethostbyname and gethostbyaddr. A value of zero allows the connection to be closed. |
| ht_data | Points to the hostent_data structure. |
| /etc/hosts | Contains the host name database. |
| /etc/netsvc.conf | Contains the name services ordering. |
| /etc/include/netdb.h | Contains the network database structure. |
endhostent_r Subroutine, gethostbyname_r Subroutine, gethostbyaddr_r Subroutine, and gethostent_r Subroutine.