sethostent()

Open the host database file

Synopsis:

#include <netdb.h>

void sethostent( int stayopen );

Arguments:

stayopen
Nonzero if you want all queries to the name server to use TCP and you want the connection to be retained after each call to gethostbyname() or gethostbyaddr() .

If the stayopen flag is zero, queries use UDP datagrams.

Library:

libsocket

Use the -l socket option to qcc to link against this library.

Description:

The sethostent() routine opens the host database file.

You can use the sethostent() function to request the use of a connected TCP socket for queries.

Classification:

POSIX 1003.1

Safety:  
Cancellation point Yes
Interrupt handler No
Signal handler No
Thread No

Caveats:

This function uses static data; if the data is needed for future use, it should be copied before any subsequent calls overwrite it.

Last modified: 2013-12-23

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