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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Wrapper function to implement reboot w/ arguments on x86
* platforms. Extract reboot arguments and place them in
* in a transient entry in /[stub]boot/grub/menu.lst
* All other commands are passed through.
*/
#include "lint.h"
#include "mtlib.h"
#include <fcntl.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/uadmin.h>
#include <unistd.h>
#include <strings.h>
#include <pthread.h>
#include <zone.h>
#include <libscf.h>
#include <thread.h>
#include <dlfcn.h>
#include <atomic.h>
/*
* Pull in the following three interfaces from libscf without introducing
* a dependency on it, which since libscf depends on libc would be circular:
*
* scf_simple_prop_get
* scf_simple_prop_next_boolean
* scf_simple_prop_free
*/
typedef scf_simple_prop_t *(*scf_simple_prop_get_t)(scf_handle_t *,
const char *, const char *, const char *);
static scf_simple_prop_get_t real_scf_simple_prop_get = NULL;
typedef uint8_t *(*scf_simple_prop_next_boolean_t)(scf_simple_prop_t *);
static scf_simple_prop_next_boolean_t real_scf_simple_prop_next_boolean = NULL;
typedef void (*scf_simple_prop_free_t)(scf_simple_prop_t *);
static scf_simple_prop_free_t real_scf_simple_prop_free = NULL;
static mutex_t scf_lock = DEFAULTMUTEX;
static void
load_scf(void)
{
void *scf_handle = dlopen("libscf.so.1", RTLD_LAZY);
scf_simple_prop_get_t scf_simple_prop_get = (scf_handle == NULL)? NULL :
(scf_simple_prop_get_t)dlsym(scf_handle, "scf_simple_prop_get");
scf_simple_prop_next_boolean_t scf_simple_prop_next_boolean =
(scf_handle == NULL)? NULL :
(scf_simple_prop_next_boolean_t)dlsym(scf_handle,
"scf_simple_prop_next_boolean");
scf_simple_prop_free_t scf_simple_prop_free =
(scf_handle == NULL)? NULL :
(scf_simple_prop_free_t)dlsym(scf_handle, "scf_simple_prop_free");
lmutex_lock(&scf_lock);
if (real_scf_simple_prop_get == NULL ||
real_scf_simple_prop_next_boolean == NULL ||
real_scf_simple_prop_free == NULL) {
if (scf_simple_prop_get == NULL)
real_scf_simple_prop_get = (scf_simple_prop_get_t)(-1);
else {
real_scf_simple_prop_get = scf_simple_prop_get;
scf_handle = NULL; /* don't dlclose it */
}
if (scf_simple_prop_next_boolean == NULL)
real_scf_simple_prop_next_boolean =
(scf_simple_prop_next_boolean_t)(-1);
else {
real_scf_simple_prop_next_boolean =
scf_simple_prop_next_boolean;
scf_handle = NULL; /* don't dlclose it */
}
if (scf_simple_prop_free == NULL)
real_scf_simple_prop_free =
(scf_simple_prop_free_t)(-1);
else {
real_scf_simple_prop_free = scf_simple_prop_free;
scf_handle = NULL; /* don't dlclose it */
}
membar_producer();
}
lmutex_unlock(&scf_lock);
if (scf_handle)
(void) dlclose(scf_handle);
}
static void
check_archive_update(void)
{
scf_simple_prop_t *prop = NULL;
boolean_t update_flag = B_FALSE;
char *fmri = "svc:/system/boot-config:default";
uint8_t *ret_val = NULL;
if (real_scf_simple_prop_get == NULL ||
real_scf_simple_prop_next_boolean == NULL ||
real_scf_simple_prop_free == NULL) {
load_scf();
}
if (real_scf_simple_prop_get == (scf_simple_prop_get_t)(-1) ||
real_scf_simple_prop_next_boolean ==
(scf_simple_prop_next_boolean_t)(-1) ||
real_scf_simple_prop_free == (scf_simple_prop_free_t)(-1)) {
return;
}
prop = real_scf_simple_prop_get(NULL, fmri, "config",
"uadmin_boot_archive_sync");
if (prop) {
if ((ret_val = real_scf_simple_prop_next_boolean(prop)) !=
NULL)
update_flag = (*ret_val == 0) ? B_FALSE :
B_TRUE;
real_scf_simple_prop_free(prop);
}
if (update_flag == B_TRUE)
(void) system("/sbin/bootadm update-archive");
}
static int
legal_arg(char *bargs)
{
int i;
for (i = 0; i < BOOTARGS_MAX; i++, bargs++) {
if (*bargs == 0 && i > 0)
return (i);
if (!isprint(*bargs))
break;
}
return (-1);
}
static char quote[] = "\'";
int
uadmin(int cmd, int fcn, uintptr_t mdep)
{
extern int __uadmin(int cmd, int fcn, uintptr_t mdep);
char *bargs, cmdbuf[256];
struct stat sbuf;
char *altroot;
bargs = (char *)mdep;
if (geteuid() == 0 && getzoneid() == GLOBAL_ZONEID &&
(cmd == A_SHUTDOWN || cmd == A_REBOOT)) {
int off = 0;
switch (fcn) {
case AD_IBOOT:
case AD_SBOOT:
case AD_SIBOOT:
/*
* These functions fabricate appropriate bootargs.
* If bootargs are passed in, map these functions
* to AD_BOOT.
*/
if (bargs == 0) {
switch (fcn) {
case AD_IBOOT:
bargs = "-a";
break;
case AD_SBOOT:
bargs = "-s";
break;
case AD_SIBOOT:
bargs = "-sa";
break;
}
}
/*FALLTHROUGH*/
case AD_BOOT:
case AD_FASTREBOOT:
if (bargs == 0)
break; /* no args */
if (legal_arg(bargs) < 0)
break; /* bad args */
/* avoid cancellation in system() */
(void) pthread_setcancelstate(PTHREAD_CANCEL_DISABLE,
NULL);
/* check for /stubboot */
if (stat("/stubboot/boot/grub/menu.lst", &sbuf) == 0) {
altroot = "-R /stubboot ";
} else {
altroot = "";
}
if (fcn == AD_FASTREBOOT) {
char *newarg, *head;
char bargs_scratch[BOOTARGS_MAX];
bzero(bargs_scratch, BOOTARGS_MAX);
bcopy(bargs, bargs_scratch, strlen(bargs));
head = bargs_scratch;
newarg = strtok(bargs_scratch, " ");
if (newarg == NULL || newarg[0] == '-')
break;
/* First argument is rootdir */
if (strncmp(&newarg[strlen(newarg)-4],
"unix", 4) != 0) {
newarg = strtok(NULL, " ");
off = newarg - head;
}
/*
* If we are using alternate root via
* mountpoint or a different BE, don't
* bother to update the temp menu entry.
*/
if (off > 0)
break;
}
/* are we rebooting to a GRUB menu entry? */
if (isdigit(bargs[0])) {
int entry = strtol(bargs, NULL, 10);
(void) snprintf(cmdbuf, sizeof (cmdbuf),
"/sbin/bootadm set-menu %sdefault=%d",
altroot, entry);
} else {
(void) snprintf(cmdbuf, sizeof (cmdbuf),
"/sbin/bootadm -m update_temp %s"
"-o %s%s%s", altroot, quote,
&bargs[off], quote);
}
(void) system(cmdbuf);
}
check_archive_update();
}
return (__uadmin(cmd, fcn, mdep));
}
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