NAME
getprotoent, getprotobynumber, getprotobyname, setprotoent,
endprotoent - get protocol entry

SYNOPSIS
#include <netdb.h>

struct protoent *getprotoent()

struct protoent *getprotobyname(name)
const char *name;

struct protoent *getprotobynumber(proto)
int proto;

void setprotoent(stayopen)
int stayopen

void endprotoent()

DESCRIPTION
Getprotoent, getprotobyname, and getprotobynumber each return a
pointer to an object with the following structure containing the
broken-out fields of a line in the network protocol data base,
/etc/protocols.

struct protoent {
char *p_name; /* official name of protocol */
char **p_aliases; /* alias list */
int p_proto; /* protocol number */
};

The members of this structure are:

p_name The official name of the protocol.

p_aliases A zero terminated list of alternate names for the
protocol.

p_proto The protocol number.

Getprotoent reads the next line of the file, opening the file if
necessary.

Setprotoent opens and rewinds the file. If the stayopen flag is
non-zero, the net data base will not be closed after each call to
getprotobyname or getprotobynumber.

Endprotoent closes the file.

Getprotobyname and getprotobynumber sequentially search from the
beginning of the file until a matching protocol name or protocol
number is found, or until EOF is encountered.

FILES
/etc/protocols