setprotoent()
Open the protocol name database file
Synopsis:
#include <netdb.h>
void setprotoent( int stayopen );
Arguments:
- stayopen
- Nonzero if you don't want the database to be closed after each call to getprotobyname() or getprotobynumber() .
Library:
libsocket
Use the -l socket option to qcc to link against this library.
Description:
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() .
Files:
- /etc/protocols
- Protocol name database file.
Classification:
| Safety: | |
|---|---|
| Cancellation point | Yes |
| Interrupt handler | No |
| Signal handler | No |
| Thread | No |
Caveats:
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.