inndcomm - INND communication part of InterNetNews library
ICCcommand(cmd, argv, replyp)
extern char *ICCfailure;
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
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
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.
Written by Rich $alz <email@example.com> for InterNetNews. This is
revision 7901, dated 2008-06-22.
ctlinnd(8), innd(8), libinn(3).