zkGetprotobyname, zkGetprotobynumber - network services database functions
#include "zkNetdb.h"
struct servent
*
zkGetprotobyname(const char* name, const char* proto);
struct servent
*
zkGetprotobynumber(int port, const char* proto);
The zkGetprotobyname(), zkGetprotobynumber() functions each return a pointer to a servent structure, the members of which contain the fields of an entry in the network services database.
The zkGetprotobyname() function searches the database from the beginning and finds the first entry for which the service name specified by name matches the s_name member and the protocol name specified by proto matches the s_proto member, opening a connection to the database if necessary. If proto is a null pointer, any value of the s_proto member will be matched.
The zkGetprotobynumber() function searches the database from the beginning and finds the first entry for which the port specified by port matches the s_port member and the protocol name specified by proto matches the s_proto member, opening a connection to the database if necessary. If proto is a null pointer, any value of the s_proto member will be matched. The port argument must be in network byte order.
On successful completion, zkGetprotobyname() and zkGetprotobynumber() return a pointer to a servent structure if the requested entry was found, and NULL if the end of the database was reached or the requested entry was not found.
No errors are defined.
The port argument of zkGetprotobynumber() need not be compatible with the port values of all address families.
The zkGetprotobyname() and zkGetprotobynumber() 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.