Open the protocol name database file
#include <netdb.h> void setprotoent( int stayopen );
The setprotoent() function opens and rewinds the protocol name database file. If the stayopen flag is nonzero, the protocol name database isn't closed after each call to getprotobyname() or getprotobynumber().
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, you should copy it before any subsequent calls overwrite it.
Currently, only the Internet protocols are understood.