ftp.nice.ch/pub/next/tools/printer/NPoff.s.tar.gz#/NPoff/NPoff_main.m

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/* 
 * This file is not to be maintained by ProjectBuilder!
 *
 * Application: NPoff
 *
 * Purpose: To power down an attached NeXT laser printer.
 *
 * Author: Christopher Rath     crath@bnr.ca    (613) 824-4584
 *         Box 15781, Station 'F'
 *         Ottawa, ON   CANADA
 *         K1C 3S7
 *
 * Version: 1.0
 *
 * Written: 18 March, 1994
 *
 * Bugs: Doesn't advertise itself as a service.
 *
 * Copyright: None.
 *            Released to the public domain.
 */

#import <appkit/appkit.h>
#import <errno.h>
#import <string.h>
#import <sys/file.h>


/*
 * Contants:
 *
 * NPPOWER - The UNIX command used to control power to the NeXT printer.
 * OFF - The parameter to pass to NPPOWER to turn off the printer.
 * ON - The parameter to pass to NPPOWER to turn on the printer.
 */
#define NPPOWER "/usr/etc/nppower"
#define OFF     "off"
#define ON      "on"


void main(int argc, char *argv[])
{
    [Application new];

    if (access(NPPOWER, F_OK | X_OK))
    {
        /* 
         * Some Error occured, put up an alert box informing the user.
         */ 
        NXRunAlertPanel([NXApp appName],
                        "Unable to execute %s to power down the NeXT printer: %s (%d).",
                        "Cancel", NULL, NULL,
                        NPPOWER, strerror(errno), errno);
    }
    else
    {
        /*
         * Access() says we can execute NPPOWER, so let's do it.
         */
        system(NPPOWER " " OFF);
    }
    
    [NXApp free];
    exit(0);
}

These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.