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The
and functions 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, 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: The official name of the protocol.
A zero terminated list of alternate names for the protocol. The protocol
number. The function reads the next line of the file, opening the file
if necessary. The function opens and rewinds the file. If the flag is
non-zero, the net data base will not be closed after each call to or
The function closes the file. The function and sequentially search
from the beginning of the file until a matching protocol name or protocol
number is found, or until is encountered.
Null pointer (0)
returned on or error.
The and functions appeared
in
These functions use a static data space; if the data is needed
for future use, it should be copied before any subsequent calls overwrite
it. Only the Internet protocols are currently understood.
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