Manual Pages for UNIX Operating System command usage for man curl_multi_fdset

libcurl Manual                                curl_multi_fdset(3)



NAME
     curl_multi_fdset - extracts file descriptor information from
     a multi handle

SYNOPSIS
     #include 

     CURLMcode curl_multi_fdset(CURLM *multi_handle,
                                fd_set *read_fd_set,
                                fd_set *write_fd_set,
                                fd_set *exc_fd_set,
                                int *max_fd);

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

     To be sure to  have  up-to-date  results,  you  should  call
     curl_multi_perform     until     it    does    not    return
     CURLM_CALL_MULTI_PERFORM prior to calling  curl_multi_fdset.
     This  will  make  sure that libcurl has updated the handles'
     socket states.

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

     When doing select(), you should  use  curl_multi_timeout  to
     figure   out   how   long   to   wait   for   action.   Call
     curl_multi_perform even if no activity has been seen on  the
     fd_sets  after  the  timeout  expires  as otherwise internal
     retries and timeouts may not work as you'd think and want.

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

SEE ALSO
     curl_multi_cleanup(3),                   curl_multi_init(3),
     curl_multi_timeout(3), curl_multi_perform(3)

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





libcurl 7.16.0       Last change: 2 Jan 2006                    1






libcurl Manual                                curl_multi_fdset(3)



     _______________________________________
    |   ATTRIBUTE TYPE   |  ATTRIBUTE VALUE|
    |____________________|__________________|_
    | Availability       |  web/curl       |
    |____________________|__________________|_
    | Interface Stability|  Uncommitted    |
    |____________________|_________________|

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













































libcurl 7.16.0       Last change: 2 Jan 2006                    2