getprotobyname

getprotobyname

Gets Protocol Information by Name

Portability: UNIX compatible

SYNOPSIS
DESCRIPTION
RETURN VALUE
CAUTION
PORTABILITY
IMPLEMENTATION
RELATED FUNCTIONS

SYNOPSIS

#include <netdb.h>

struct protoent *getprotobyname(char *name);

DESCRIPTION

Given the null-terminated name of a protocol, getprotobyname returns a pointer to the protoent structure defined in <netdb.h> . This structure is typically used to obtain the number for the protocol from the p_proto field. Refer to <netdb.h> for details on the protoent structure. The source of the data in this structure is the protocols file, that is, a file with the same format as the /etc/protocols file on a UNIX operating system. Refer to Search Logic for information on the logic used to determine the location of the protocols file.

RETURN VALUE

If getprotobyname succeeds, it returns a pointer to the protoent structure. A null pointer indicates the network address was not found in the network file.

CAUTION

The value that getprotobyname returns points to a static structure within the library. You must copy the information from this structure before you make further getprotobyname , getprotobynumber , or getprotoent calls.

PORTABILITY

getprotobyname is portable to other environments, including most UNIX systems, that implement BSD sockets.

IMPLEMENTATION

getprotobyname is ported directly from the BSD UNIX Socket Library.

RELATED FUNCTIONS

endprotoent , setprotoent , getprotobynumber , getprotoent

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