userboot/userboot/bootinfo.c

	bootinfo.c revision 199767f8919635c4928607450d9e0abb932109ce
/*-
 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <stand.h>
#include <sys/param.h>
#include <sys/reboot.h>
#include <sys/linker.h>
#include <sys/boot.h>

#include "bootstrap.h"
#include "libuserboot.h"

int
bi_getboothowto(char *kargs)
{
    char    *cp;
    char    *curpos, *next, *string;
    int     howto;
    int     active;
    int     i;
    int     vidconsole;

    /* Parse kargs */
    howto = 0;
    if (kargs  != NULL) {
    cp = kargs;
    active = 0;
    while (*cp != 0) {
        if (!active && (*cp == '-')) {
        active = 1;
        } else if (active)
        switch (*cp) {
        case 'a':
            howto |= RB_ASKNAME;
            break;
        case 'C':
            howto |= RB_CDROM;
            break;
        case 'd':
            howto |= RB_KDB;
            break;
        case 'D':
            howto |= RB_MULTIPLE;
            break;
        case 'm':
            howto |= RB_MUTE;
            break;
        case 'g':
            howto |= RB_GDB;
            break;
        case 'h':
            howto |= RB_SERIAL;
            break;
        case 'p':
            howto |= RB_PAUSE;
            break;
        case 'r':
            howto |= RB_DFLTROOT;
            break;
        case 's':
            howto |= RB_SINGLE;
            break;
        case 'v':
            howto |= RB_VERBOSE;
            break;
        default:
            active = 0;
            break;
        }
        cp++;
    }
    }
    /* get equivalents from the environment */
    for (i = 0; howto_names[i].ev != NULL; i++)
    if (getenv(howto_names[i].ev) != NULL)
        howto |= howto_names[i].mask;

    /* Enable selected consoles */
    string = next = strdup(getenv("console"));
    vidconsole = 0;
    while (next != NULL) {
    curpos = strsep(&next, " ,");
    if (*curpos == '\0')
        continue;
    if (!strcmp(curpos, "vidconsole"))
        vidconsole = 1;
    else if (!strcmp(curpos, "comconsole"))
        howto |= RB_SERIAL;
    else if (!strcmp(curpos, "nullconsole"))
        howto |= RB_MUTE;
    }

    if (vidconsole && (howto & RB_SERIAL))
    howto |= RB_MULTIPLE;

    /*
     * XXX: Note that until the kernel is ready to respect multiple consoles
     * for the boot messages, the first named console is the primary console
     */
    if (!strcmp(string, "vidconsole"))
    howto &= ~RB_SERIAL;

    free(string);

    return(howto);
}

void
bi_setboothowto(int howto)
{
    int     i;

    for (i = 0; howto_names[i].ev != NULL; i++)
    if (howto & howto_names[i].mask)
        setenv(howto_names[i].ev, "YES", 1);
}

/*
 * Copy the environment into the load area starting at (addr).
 * Each variable is formatted as <name>=<value>, with a single nul
 * separating each variable, and a double nul terminating the environment.
 */
vm_offset_t
bi_copyenv(vm_offset_t addr)
{
    struct env_var  *ep;

    /* traverse the environment */
    for (ep = environ; ep != NULL; ep = ep->ev_next) {
        CALLBACK(copyin, ep->ev_name, addr, strlen(ep->ev_name));
    addr += strlen(ep->ev_name);
    CALLBACK(copyin, "=", addr, 1);
    addr++;
    if (ep->ev_value != NULL) {
            CALLBACK(copyin, ep->ev_value, addr, strlen(ep->ev_value));
        addr += strlen(ep->ev_value);
    }
    CALLBACK(copyin, "", addr, 1);
    addr++;
    }
    CALLBACK(copyin, "", addr, 1);
    addr++;
    return(addr);
}