libcurl Manual                                curlmultifdset(3)



NAME
     curlmultifdset - extracts file descriptor information from
     a multi handle

SYNOPSIS
     #include 

     CURLMcode curlmultifdset(CURLM *multihandle,
                                fdset *readfdset,
                                fdset *writefdset,
                                fdset *excfdset,
                                int *maxfd);

DESCRIPTION
     This function extracts file descriptor  information  from  a
     given  multihandle.   libcurl  returns its fdset sets. The
     application can use these to select() on,  but  be  sure  to
     FDZERO    them    before    calling    this   function   as
     curlmultifdset(3)  only  adds  its  own  descriptors,   it
     doesn't   zero   or   otherwise   remove   any  others.  The
     curlmultiperform(3) function should be called as  soon  as
     one of them is ready to be read from or written to.

     If no file descriptors are set by libcurl, maxfd will  con-
     tain  -1  when this function returns. Otherwise it will con-
     tain the higher descriptor number libcurl set.

     You should also be  aware  that  when  doing  select(),  you
     should consider using a rather small (single-digit number of
     seconds) timeout and  call  curlmultiperform  regularly  -
     even if no activity has been seen on the fdsets - as other-
     wise libcurl-internal retries and timeouts may not  work  as
     you'd think and want.

     Starting   with   libcurl    7.16.0,    you    should    use
     curlmultitimeout  to  figure  out  how  long  to  wait for
     action.

RETURN VALUE
     CURLMcode type, general libcurl multi interface error  code.
     See libcurl-errors(3)

SEE ALSO
     curlmulticleanup(3),curlmultiinit(3),
     curlmultitimeout(3)

ATRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:






libcurl 7.16.0       Last change: 2 Jan 2006                    1






libcurl Manual                                curlmultifdset(3)



     
       ATRIBUTE TYPE     ATRIBUTE VALUE
    
     Availability         SUNWcurl       
    
     Interface Stability  Uncommitted    
    

NOTES
     Source for C-URL is available on http:/opensolaris.org.













































libcurl 7.16.0       Last change: 2 Jan 2006                    2