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@(#)getprotoent.3 6.4 (Berkeley) 02/14/89
#include <netdb.h>struct protoent *getprotoent()
struct protoent *getprotobyname(name) char *name;
struct protoent *getprotobynumber(proto) int proto;
setprotoent(stayopen) int stayopen
endprotoent()
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:
\w'p_aliases'u+2n p_name The official name of the protocol.
\w'p_aliases'u+2n p_aliases A zero terminated list of alternate names for the protocol.
\w'p_aliases'u+2n 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.