source: projects/initscripts/trunk/src/consoletype.c @ 1108

/*
 * Copyright (c) 1999-2003 Red Hat, Inc. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2,
 * as published by the Free Software Foundation.
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 *
 */

#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/sysmacros.h>

int main(int argc, char **argv)
{
    unsigned char twelve = 12;
    char *type;
    int maj, min, ret = 0, fg = -1;
    struct stat sb;
        
    fstat(0, &sb);
    maj = major(sb.st_rdev);
    min = minor(sb.st_rdev);
    if (maj != 3 && (maj < 136 || maj > 143)) {
        if ((fg = ioctl (0, TIOCLINUX, &twelve)) < 0) {
            type = "serial";
            ret = 1;
        } else {
#ifdef __powerpc__
            int fd;
            char buf[65536];
            
            fd = open("/proc/tty/drivers",O_RDONLY);
            read(fd, buf, 65535);
            if (strstr(buf,"vioconsole           /dev/tty")) {
                    type = "vio";
                    ret = 3;
            } else {
                    type = "vt";
                    ret = 0;
            }
#else
            type = "vt";
            ret = 0;
#endif
        }
    } else {
        type = "pty";
        ret = 2;
    }
    if (argc > 1 && !strcmp(argv[1],"fg")) {
            if (fg < 0 || fg != (min-1))
                    return 1;
            return 0;
    } else {
            printf("%s\n",type);
            return ret;
    }
}