source: bootcd/isolinux/syslinux-6.03/gpxe/src/core/monojob.c

/*
 * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

FILE_LICENCE ( GPL2_OR_LATER );

#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <gpxe/process.h>
#include <console.h>
#include <gpxe/keys.h>
#include <gpxe/job.h>
#include <gpxe/monojob.h>
#include <gpxe/timer.h>

/** @file
 *
 * Single foreground job
 *
 */

static int monojob_rc;

static void monojob_done ( struct job_interface *job __unused, int rc ) {
        monojob_rc = rc;
}

/** Single foreground job operations */
static struct job_interface_operations monojob_operations = {
        .done           = monojob_done,
        .kill           = ignore_job_kill,
        .progress       = ignore_job_progress,
};

/** Single foreground job */
struct job_interface monojob = {
        .intf = {
                .dest = &null_job.intf,
                .refcnt = NULL,
        },
        .op = &monojob_operations,
};

/**
 * Wait for single foreground job to complete
 *
 * @v string            Job description to display
 * @ret rc              Job final status code
 */
int monojob_wait ( const char *string ) {
        int key;
        int rc;
        unsigned long last_progress_dot;
        unsigned long elapsed;

        printf ( "%s.", string );
        monojob_rc = -EINPROGRESS;
        last_progress_dot = currticks();
        while ( monojob_rc == -EINPROGRESS ) {
                step();
                if ( iskey() ) {
                        key = getchar();
                        switch ( key ) {
                        case CTRL_C:
                                job_kill ( &monojob );
                                rc = -ECANCELED;
                                goto done;
                        default:
                                break;
                        }
                }
                elapsed = ( currticks() - last_progress_dot );
                if ( elapsed >= TICKS_PER_SEC ) {
                        printf ( "." );
                        last_progress_dot = currticks();
                }
        }
        rc = monojob_rc;

done:
        job_done ( &monojob, rc );
        if ( rc ) {
                printf ( " %s\n", strerror ( rc ) );
        } else {
                printf ( " ok\n" );
        }
        return rc;
}