NAME

       inndcomm - INND communication part of InterNetNews library

SYNOPSIS

       #include "inn/inndcomm.h"

       int
       ICCopen()

       int
       ICCclose()

       void
       ICCsettimeout(i)
           int              i;

       int
       ICCcommand(cmd, argv, replyp)
           char             cmd;
           char             *argv[];
           char             **replyp;

       int
       ICCcancel(mesgid)
           char             *mesgid;

       int
       ICCreserve(why)
           char             *why;

       int
       ICCpause(why)
           char             *why;

       int
       ICCgo(why)
           char             *why;

       extern char *ICCfailure;

DESCRIPTION

       The  routines  described  in  this manual page are part of the InterNetNews library, libinn(3).  They are
       used to send commands to a running innd(8) daemon on the local host.  The letters ``ICC'' stand for  Innd
       Control Command.

       ICCopen  creates  a  Unix-domain  datagram  socket  and  binds  it  to  the  server's  control socket, if
       <HAVE_UNIX_DOMAIN_SOCKETS in include/config.h> is  defined.   Otherwise  it  creates  a  named  pipe  for
       communicating with the server.  It returns -1 on failure or zero on success.  This routine must be called
       before any other routine.

       ICCclose  closes  any descriptors that have been created by ICCopen.  It returns -1 on failure or zero on
       success.

       ICCsettimeout can be called before any of the following routines to determine how long the library should
       wait before giving up on getting the server's reply.  This is done by  setting  and  catching  a  SIGALRM
       signal(2).   If  the  timeout  is  less  then  zero  then  no reply will be waited for.  The SC_SHUTDOWN,
       SC_XABORT, and SC_XEXEC commands do not get a reply either.   The  default,  which  can  be  obtained  by
       setting the timeout to zero, is to wait until the server replies.

       ICCcommand  sends  the  command  cmd with parameters argv to the server.  It returns -1 on error.  If the
       server replies, and replyp is not NULL, it will be filled in with an allocated buffer that  contains  the
       full  text of the server's reply.  This buffer is a string in the form of ``<digits><space><text>'' where
       ``digits'' is the text value of the recommended exit code; zero indicates success.  Replies  longer  then
       4000  bytes  will  be truncated.  The possible values of cmd are defined in the ``inn/inndcomm.h'' header
       file.  The parameters for each  command  are  described  in  ctlinnd(8).   This  routine  returns  -1  on
       communication failure, or the exit status sent by the server which will never be negative.

       ICCcancel  sends a ``cancel'' message to the server.  Mesgid is the Message-ID of the article that should
       be cancelled.  The return value is the same as for ICCcommand.

       ICCpause, ICCreserve, and ICCgo  send  a  ``pause,''  ``reserve,''  or  ``go''  command  to  the  server,
       respectively.   If ICCreserve is used, then the why value used in the ICCpause invocation must match; the
       value used in the ICCgo invocation must always match that the one used in the ICCpause  invocation.   The
       return value for all three routines is the same as for ICCcommand.

       If any routine described above fails, the ICCfailure variable will identify the system call that failed.

HISTORY

       Written by Rich $alz <rsalz@uunet.uu.net> for InterNetNews.  This is revision 7901, dated 2008-06-22.

SEE ALSO

       ctlinnd(8), innd(8), libinn(3).

                                                                                                     INNDCOMM(3)