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/* $OpenBSD: boot.c,v 1.6 2015/11/16 19:33:52 miod Exp $ */
/*-
* Copyright (c) 1995 Theo de Raadt
* 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 ``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 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.
*
* Copyright (c) 1982, 1986, 1990, 1993
* The Regents of the University of California. 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.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* @(#)boot.c 8.1 (Berkeley) 6/10/93
*/
#include <sys/param.h>
#include <sys/reboot.h>
#include <sys/stat.h>
#define _KERNEL
#include <sys/fcntl.h>
#undef _KERNEL
#include <machine/prom.h>
#include <lib/libkern/libkern.h>
#include "stand.h"
#include "libsa.h"
extern int devparse(const char *, uint *, uint *, uint *, uint *,
const char **, const char **, char **);
extern const char version[];
char line[80];
struct boot_info bi;
char rnddata[BOOTRANDOM_MAX]; /* XXX dummy */
int loadrandom(const char *, char *, size_t);
void
boot(const char *args, uint bootdev, uint bootunit, uint bootlun)
{
char *p, *file, *fname;
char rndpath[MAXPATHLEN];
int ask;
int ret;
int rnd_loaded = 0;
uint controller, unit, lun, part;
const char *device, *ctrl;
printf("\n>> OpenBSD/" MACHINE " boot %s\n", version);
bi.bootdev = bootdev;
bi.bootunit = bootunit;
bi.bootlun = bootlun;
bi.bootpart = 0;
/*
* Older PROM version put a \r at the end of a manually entered
* boot string.
*/
if ((p = strchr(args, '\r')) != NULL)
*p = '\0';
ret = parse_args(args, &file, 1);
ask = boothowto & RB_ASKNAME;
for (;;) {
if (ask != 0) {
printf("boot: ");
getln(line, sizeof line);
if (line[0] == '\0')
continue;
ret = parse_args(line, &file, 0);
args = line;
}
if (ret != 0) {
printf("boot: returning to SCM\n");
break;
}
/*
* Try and load randomness from the boot device.
*/
if (rnd_loaded == 0) {
if (devparse(file, &controller, &unit, &lun, &part,
&device, &ctrl, &fname) == 0 &&
fname - file < sizeof(rndpath)) {
memcpy(rndpath, file, fname - file);
rndpath[fname - file] = '\0';
strlcat(rndpath, BOOTRANDOM, sizeof rndpath);
rnd_loaded = loadrandom(rndpath, rnddata,
sizeof(rnddata));
}
}
printf("%s: ", file);
exec(file, args,
bi.bootdev, bi.bootunit, bi.bootlun, bi.bootpart);
printf("boot: %s: %s\n", file, strerror(errno));
ask = 1;
}
}
int
loadrandom(const char *name, char *buf, size_t buflen)
{
struct stat sb;
int fd;
int rc = 0;
fd = open(name, O_RDONLY);
if (fd == -1) {
if (errno != EPERM)
printf("cannot open %s: %s\n", name, strerror(errno));
return 0;
}
if (fstat(fd, &sb) == -1 || sb.st_uid != 0 || !S_ISREG(sb.st_mode) ||
(sb.st_mode & (S_IWOTH|S_IROTH)))
goto fail;
(void) read(fd, buf, buflen);
rc = 1;
fail:
close(fd);
return rc;
}
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