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getprotoent
Langue: en
Version: 1993-04-24 (mandriva - 22/10/07)
Section: 3 (Bibliothèques de fonctions)
NAME
getprotoent, getprotobyname, getprotobynumber, setprotoent, endprotoent - get protocol entrySYNOPSIS
#include <netdb.h> struct protoent *getprotoent(void); struct protoent *getprotobyname(const char *name); struct protoent *getprotobynumber(int proto); void setprotoent(int stayopen); void endprotoent(void);
DESCRIPTION
The getprotoent() function reads the next line from the file /etc/protocols and returns a structure protoent containing the broken out fields from the line. The /etc/protocols file is opened if necessary.The getprotobyname() function returns a protoent structure for the line from /etc/protocols that matches the protocol name name.
The getprotobynumber() function returns a protoent structure for the line that matches the protocol number number.
The setprotoent() function opens and rewinds the /etc/protocols file. If stayopen is true (1), then the file will not be closed between calls to getprotobyname() or getprotobynumber().
The endprotoent() function closes /etc/protocols.
The protoent structure is defined in <netdb.h> as follows:
struct protoent { char *p_name; /* official protocol name */ char **p_aliases; /* alias list */ int p_proto; /* protocol number */ }
The members of the protoent structure are:
- p_name
- The official name of the protocol.
- p_aliases
- A zero terminated list of alternative names for the protocol.
- p_proto
- The protocol number.
RETURN VALUE
The getprotoent(), getprotobyname() and getprotobynumber() functions return the protoent structure, or a NULL pointer if an error occurs or the end of the file is reached.FILES
- /etc/protocols
- protocol database file
CONFORMING TO
4.3BSD, POSIX.1-2001.SEE ALSO
getnetent(3), getservent(3), protocols(5)Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre