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

    NAME

    getservent, getservbyname, getservbyport, setservent, endservent -
    get service entry
     
    

    SYNOPSIS

    #include <netdb.h>
    
    struct servent *getservent(void);
    
    struct servent *getservbyname(const char *name, const char *proto);
    
    struct servent *getservbyport(int port, const char *proto);
    
    void setservent(int stayopen);
    
    void endservent(void);
    
     

    DESCRIPTION

    The getservent() function reads the next entry from the services database (see services(5)) and returns a servent structure containing the broken-out fields from the entry. A connection is opened to the database if necessary.

    The getservbyname() function returns a servent structure for the entry from the database that matches the service name using protocol proto. If proto is NULL, any protocol will be matched. A connection is opened to the database if necessary.

    The getservbyport() function returns a servent structure for the entry from the database that matches the port port (given in network byte order) using protocol proto. If proto is NULL, any protocol will be matched. A connection is opened to the database if necessary.

    The setservent() 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 getserv*() functions.

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

    The servent structure is defined in <netdb.h> as follows:

    struct servent {
        char  *s_name;       /* official service name */
        char **s_aliases;    /* alias list */
        int    s_port;       /* port number */
        char  *s_proto;      /* protocol to use */
    }
    

    The members of the servent structure are:

    s_name
    The official name of the service.
    s_aliases
    A NULL-terminated list of alternative names for the service.
    s_port
    The port number for the service given in network byte order.
    s_proto
    The name of the protocol to use with this service.
     

    RETURN VALUE

    The getservent(), getservbyname() and getservbyport() functions return a pointer to a statically allocated servent structure, or a NULL pointer if an error occurs or the end of the file is reached.  

    FILES

    /etc/services
    services database file
     

    CONFORMING TO

    4.3BSD, POSIX.1-2001.  

    SEE ALSO

    getnetent(3), getprotoent(3), getservent_r(3), services(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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