ENDPROTOENT(3XNET) X/Open Networking Services Library Functions
NAME
endprotoent, getprotobynumber, getprotobyname, getprotoent,
setprotoent - network protocol database functions
SYNOPSIS
cc [
flag ... ]
file ...
-lxnet [
library ... ]
#include <netdb.h>
void endprotoent(void)
struct protoent *getprotobyname(
const char *name);
struct protoent *getprotobynumber(
int proto);
struct protoent *getprotoent(void)
void setprotoent(
int stayopen);
DESCRIPTION
The
getprotobyname(),
getprotobynumber() and
getprotoent(), functions
each return a pointer to a
protoent structure, the members of which
contain the fields of an entry in the network protocol database.
The
getprotoent() function reads the next entry of the database,
opening a connection to the database if necessary.
The
getprotobyname() function searches the database from the
beginning and finds the first entry for which the protocol name
specified by
name matches the
p_name member, opening a connection to
the database if necessary.
The
getprotobynumber() function searches the database from the
beginning and finds the first entry for which the protocol number
specified by
number matches the
p_proto member, opening a connection
to the database if necessary.
The
setprotoent() function opens a connection to the database, and
sets the next entry to the first entry. If the
stayopen argument is
non-zero, the connection to the network protocol database will not be
closed after each call to
getprotoent() (either directly, or
indirectly through one of the other
getproto*() functions).
The
endprotoent() function closes the connection to the database.
USAGE
The
getprotobyname(),
getprotobynumber() and
getprotoent() functions
may return pointers to static data, which may be overwritten by
subsequent calls to any of these functions.
These functions are generally used with the Internet address family.
RETURN VALUES
On successful completion,
getprotobyname(),
getprotobynumber() and
getprotoent() functions return a pointer to a
protoent structure if
the requested entry was found, and a null pointer if the end of the
database was reached or the requested entry was not found.
Otherwise, a null pointer is returned.
ERRORS
No errors are defined.
ATTRIBUTES
See
attributes(7) for descriptions of the following attributes:
+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Standard |
+--------------------+-----------------+
|MT-Level | MT-Safe |
+--------------------+-----------------+
SEE ALSO
attributes(7),
standards(7) June 10, 2002 ENDPROTOENT(3XNET)
