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nc_perror (3)
  • >> nc_perror (3) ( FreeBSD man: Библиотечные вызовы )

  • BSD mandoc
     

    NAME

    
    
    getnetconfig
    
     
    setnetconfig
    
     
    endnetconfig
    
     
    getnetconfigent
    
     
    freenetconfigent
    
     
    nc_perror
    
     
    nc_sperror
    
     - get network configuration database entry
    
     
    

    LIBRARY

    Lb libc
    
     
    

    SYNOPSIS

       #include <netconfig.h>
    struct netconfig * getnetconfig (void *handlep);
    void * setnetconfig (void);
    int endnetconfig (void *handlep);
    struct netconfig * getnetconfigent (const char *netid);
    void freenetconfigent (struct netconfig *netconfigp);
    void nc_perror (const char *msg);
    char * nc_sperror (void);
     

    DESCRIPTION

    The library routines described on this page provide the application access to the system network configuration database, /etc/netconfig The getnetconfig ();
    function returns a pointer to the current entry in the netconfig database, formatted as a struct netconfig . Successive calls will return successive netconfig entries in the netconfig database. The getnetconfig ();
    function can be used to search the entire netconfig file. The getnetconfig ();
    function returns NULL at the end of the file. The Fa handlep argument is the handle obtained through setnetconfig (.);

    A call to setnetconfig ();
    has the effect of ``binding'' to or ``rewinding'' the netconfig database. The setnetconfig ();
    function must be called before the first call to getnetconfig ();
    and may be called at any other time. The setnetconfig ();
    function need not be called before a call to getnetconfigent (.);
    The setnetconfig ();
    function returns a unique handle to be used by getnetconfig (.);

    The endnetconfig ();
    function should be called when processing is complete to release resources for reuse. The Fa handlep argument is the handle obtained through setnetconfig (.);
    Programmers should be aware, however, that the last call to endnetconfig ();
    frees all memory allocated by getnetconfig ();
    for the struct netconfig data structure. The endnetconfig ();
    function may not be called before setnetconfig (.);

    The getnetconfigent ();
    function returns a pointer to the netconfig structure corresponding to Fa netid . It returns NULL if Fa netid is invalid (that is, does not name an entry in the netconfig database).

    The freenetconfigent ();
    function frees the netconfig structure pointed to by Fa netconfigp (previously returned by getnetconfigent () .);

    The nc_perror ();
    function prints a message to the standard error indicating why any of the above routines failed. The message is prepended with the string Fa msg and a colon. A newline character is appended at the end of the message.

    The nc_sperror ();
    function is similar to nc_perror ();
    but instead of sending the message to the standard error, will return a pointer to a string that contains the error message.

    The nc_perror ();
    and nc_sperror ();
    functions can also be used with the NETPATH access routines defined in getnetpath(3).  

    RETURN VALUES

    The setnetconfig ();
    function returns a unique handle to be used by getnetconfig (.);
    In the case of an error, setnetconfig ();
    returns NULL and nc_perror ();
    or nc_sperror ();
    can be used to print the reason for failure.

    The getnetconfig ();
    function returns a pointer to the current entry in the netconfig database, formatted as a struct netconfig . The getnetconfig ();
    function returns NULL at the end of the file, or upon failure.

    The endnetconfig ();
    function returns 0 on success and -1 on failure (for example, if setnetconfig ();
    was not called previously).

    On success, getnetconfigent ();
    returns a pointer to the struct netconfig structure corresponding to Fa netid ; otherwise it returns NULL

    The nc_sperror ();
    function returns a pointer to a buffer which contains the error message string. This buffer is overwritten on each call. In multithreaded applications, this buffer is implemented as thread-specific data.  

    FILES

    /etc/netconfig

     

    SEE ALSO

    getnetpath(3), netconfig(5)


     

    Index

    NAME
    LIBRARY
    SYNOPSIS
    DESCRIPTION
    RETURN VALUES
    FILES
    SEE ALSO


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