NAME

       gspool_ptrop - perform an operation on a printer

SYNOPSIS

       #include <gspool.h>

       int gspool_ptrop(const int fd, const unsigned flags, const slotno_t slot, const unsigned
       op)

DESCRIPTION

       The gspool_ptrop() function is used to perform an operation on a printer.

       fd is a file descriptor previously returned by gspool_open

       flags is zero, or "GSPOOL_FLAG_IGNORESEQ" to ignore changes since the list was last read

       slot is the slot number corresponding to the printer as previously returned by a call to
       gspool_ptrlist() or gspool_ptrfindslot.

       op is one of the following values:

       PRINOP_RSP
               Restart printer

       PRINOP_PHLT
               Halt printer at the end of the current job

       PRINOP_PSTP
               Halt printer at once

       PRINOP_PGO
               Start printer

       PRINOP_OYES
               Approve alignment page

       PRINOP_ONO
               Disapprove alignment page

       PRINOP_INTER
               Interrupt printer

       PRINOP_PJAB
               Abort current job on printer

RETURN VALUES

       The function gspool_ptrop() returns 0 if successful, otherwise one of the following codes:

       GSPOOL_INVALID_FD
               Invalid File descriptor

       GSPOOL_BADWRITE
               failure writing to the network

       GSPOOL_BADREAD
               failure reading from the network

       GSPOOL_NOPERM
               The user does not have permission

       GSPOOL_SEQUENCE
               Sequence error, slot may be out of date

       GSPOOL_PTR_RUNNING
               Printer is running

       GSPOOL_PTR_NOTRUNNING
               Printer is not running

EXAMPLE

       An example to halt all printers:

        int     fd, ret, np, i;
        struct apispptr ptr;
        slotno_t *slots;

        fd = gspool_open("myhost", (char *) 0, 0);
        if (fd < 0) { /* error handling */
            ...
        }

        /* make a list of all the printers */

        ret = gspool_ptrlist(fd, 0, &np, &slots);
        if (ret < 0) { /* error handling */
            ...
        }

        for (i = 0; i < np; i++) {
            ret = gspool_ptrop(fd, GSPOOL_FLAG_IGNORESEQ, slots[i], PRINOP_PHLT);
            if (ret < 0  &&  ret != GSPOOL_PTR_NOTRUNNING) {
                /* error handling ignoring ones already stopped*/
                ...
            }
        }
        gspool_close(fd);

SEE ALSO

       gspool_ptrlist(3), gspool_ptrread(3), gspool_ptradd(3), gspool_ptrdel(3),
       gspool_ptrfind(3), gspool_ptrfindslot(3), gspool_ptrupd(3), gspool_ptrmon(3).

COPYRIGHT

       Copyright (c) 2009 Free Software Foundation, Inc.  This is free software. You may
       redistribute copies of it under the terms of the GNU General Public License
       <http://www.gnu.org/licenses/gpl.html>.  There is NO WARRANTY, to the extent permitted by
       law.

AUTHOR

       John M Collins, Xi Software Ltd.