setprotoent()

Open the protocol name database file

Synopsis:

#include <netdb.h>

void setprotoent( int stayopen );

Arguments:

stayopen
Nonzero if you don't want the database to be closed after each call to getprotobyname() or getprotobynumber() .

Library:

libsocket

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

Description:

The setprotoent() function opens and rewinds the protocol name database file. If the stayopen flag is nonzero, the protocol name database isn't closed after each call to getprotobyname() or getprotobynumber() .

Files:

/etc/protocols
Protocol name database file.

Classification:

POSIX 1003.1

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

Caveats:

This function uses static data; if you need the data for future use, you should copy it before any subsequent calls overwrite it.

Currently, only the Internet protocols are understood.

Last modified: 2013-12-23

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