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Get a protocol entry, given a name
#include <netdb.h>
struct protoent * getprotobyname( const char * name );
- name
- The name of the protocol whose entry you want to get.
libsocket
Use the -l socket option to
qcc
to link against this library.
The getprotobyname() function gets the entry for the given name
from the protocol database, /etc/protocols.
This function returns a pointer to a structure of type
protoent, which
contains the broken-out fields of a line in the network protocol database.
The
setprotoent()
function opens and rewinds the file.
If you pass a nonzero stayopen argument to
setprotoent(), the protocol database isn't closed after each call to
getprotobyname() or
getprotobynumber().
The getprotobyname() and getprotobynumber()
functions sequentially search from the beginning of the file until a matching protocol
name or protocol number is found, or until EOF is encountered.
A pointer to a valid protoent structure, or NULL if an error occurs.
- /etc/protocols
- Protocol name database file.
POSIX 1003.1
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.
endprotoent(),
getprotobynumber(),
getprotoent(),
protoent,
setprotoent()
/etc/protocols
in the Utilities Reference
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