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:

Operation code Description
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 returns 0 if successful otherwise one of the error codes listed in Chapter 3.


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).


AUTHOR

John M Collins, Xi Software Ltd.