Read the next line of the protocol name database file
#include <netdb.h> struct protoent * getprotoent( void );
The getprotoent() function reads the next line of the protocol name database file, opening the file if necessary. It returns a pointer to a structure of type protoent, which contains the broken-out fields of a line in the network protocol database, /etc/protocols.
A pointer to a valid protoent structure, or NULL if an error occurs or the end of the file (EOF) is reached.
Safety: | |
---|---|
Cancellation point | Yes |
Interrupt handler | No |
Signal handler | No |
Thread | No |
This function uses static data; if you need the data for future use, copy it before any subsequent calls overwrite it.
Currently, only the Internet protocols are understood.