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getprotobyname (3)
  • getprotobyname (3) ( Solaris man: Библиотечные вызовы )
  • getprotobyname (3) ( FreeBSD man: Библиотечные вызовы )
  • getprotobyname (3) ( Русские man: Библиотечные вызовы )
  • >> getprotobyname (3) ( Linux man: Библиотечные вызовы )
  • getprotobyname (3) ( POSIX man: Библиотечные вызовы )
  •  

    NAME

    getprotoent, getprotobyname, getprotobynumber, setprotoent,
    endprotoent - get protocol entry
     
    

    SYNOPSIS

    #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 entry from the protocols database (see protocols(5)) and returns a protoent structure containing the broken-out fields from the entry. A connection is opened to the database if necessary.

    The getprotobyname() function returns a protoent structure for the entry from the database that matches the protocol name name. A connection is opened to the database if necessary.

    The getprotobynumber() function returns a protoent structure for the entry from the database that matches the protocol number number. A connection is opened to the database if necessary.

    The setprotoent() function opens a connection to the database, and sets the next entry to the first entry. If stayopen is non-zero, then the connection to the database will not be closed between calls to one of the getproto*() functions.

    The endprotoent() function closes the connection to the database.

    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 NULL-terminated list of alternative names for the protocol.
    p_proto
    The protocol number.
     

    RETURN VALUE

    The getprotoent(), getprotobyname() and getprotobynumber() functions return a pointer to a statically allocated 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), getprotent_r(3), getservent(3), protocols(5)  

    COLOPHON

    This page is part of release 3.14 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUE
    FILES
    CONFORMING TO
    SEE ALSO
    COLOPHON


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