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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 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* I18N message number ranges
* This file: 6000 - 6499
* Shared common messages: 1 - 1999
*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/param.h>
#include <sys/mnttab.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/openpromio.h>
/*
* For i18n
*/
#include <stgcom.h>
/*
* 128 is the size of the largest (currently) property name
* 8192 - MAXPROPSIZE - sizeof (int) is the size of the largest
* (currently) property value, viz. nvramrc.
* the sizeof(uint_t) is from struct openpromio
*/
#define MAXPROPSIZE 128
#define MAXVALSIZE (8192 - MAXPROPSIZE - sizeof (uint_t))
#define BOOTDEV_PROP_NAME "boot-device"
static int getbootdevname(char *, char *);
static int setprom(unsigned, unsigned, char *);
extern int devfs_dev_to_prom_name(char *, char *);
/*
* Call getbootdevname() to get the absolute pathname of boot device
* and call setprom() to set the boot-device variable.
*/
int
setboot(unsigned int yes, unsigned int verbose, char *fname)
{
char bdev[MAXPATHLEN];
if (!getbootdevname(fname, bdev)) {
(void) fprintf(stderr, MSGSTR(6000,
"Cannot determine device name for %s\n"),
fname);
return (errno);
}
return (setprom(yes, verbose, bdev));
}
/*
* Read the mnttab and resolve the special device of the fs we are
* interested in, into an absolute pathname
*/
static int
getbootdevname(char *bootfs, char *bdev)
{
FILE *f;
char *fname;
char *devname;
struct mnttab m;
struct stat sbuf;
int mountpt = 0;
int found = 0;
devname = bootfs;
if (stat(bootfs, &sbuf) < 0) {
perror(MSGSTR(6001, "stat"));
return (0);
}
switch (sbuf.st_mode & S_IFMT) {
case S_IFBLK:
break;
default:
mountpt = 1;
break;
}
if (mountpt) {
fname = MNTTAB;
f = fopen(fname, "r");
if (f == NULL) {
perror(fname);
return (0);
}
while (getmntent(f, &m) == 0) {
if (strcmp(m.mnt_mountp, bootfs))
continue;
else {
found = 1;
break;
}
}
(void) fclose(f);
if (!found) {
return (0);
}
devname = m.mnt_special;
}
if (devfs_dev_to_prom_name(devname, bdev) != 0) {
perror(devname);
return (0);
}
return (1);
}
/*
* setprom() - use /dev/openprom to read the "boot_device" variable and set
* it to the new value.
*/
static int
setprom(unsigned yes, unsigned verbose, char *bdev)
{
struct openpromio *pio;
int fd;
char save_bootdev[MAXVALSIZE];
if ((fd = open("/dev/openprom", O_RDWR)) < 0) {
perror(MSGSTR(6002, "Could not open openprom dev"));
return (errno);
}
pio = (struct openpromio *)malloc(sizeof (struct openpromio) +
MAXVALSIZE + MAXPROPSIZE);
if (pio == (struct openpromio *)NULL) {
perror(MSGSTR(6003, " Error: Unable to allocate memory."));
return (errno);
}
pio->oprom_size = MAXVALSIZE;
(void) strcpy(pio->oprom_array, BOOTDEV_PROP_NAME);
if (ioctl(fd, OPROMGETOPT, pio) < 0) {
perror(MSGSTR(6004, "openprom getopt ioctl"));
return (errno);
}
/*
* save the existing boot-device, so we can use it if setting
* to new value fails.
*/
(void) strcpy(save_bootdev, pio->oprom_array);
if (verbose) {
(void) fprintf(stdout,
MSGSTR(6005,
"Current boot-device = %s\n"), pio->oprom_array);
(void) fprintf(stdout, MSGSTR(6006,
"New boot-device = %s\n"), bdev);
}
if (!yes) {
(void) fprintf(stdout, MSGSTR(6007,
"Do you want to change boot-device "
"to the new setting? (y/n) "));
switch (getchar()) {
case 'Y':
case 'y':
break;
default:
return (0);
}
}
/* set the new value for boot-device */
pio->oprom_size = (int)strlen(BOOTDEV_PROP_NAME) + 1 +
(int)strlen(bdev);
(void) strcpy(pio->oprom_array, BOOTDEV_PROP_NAME);
(void) strcpy(pio->oprom_array + (int)strlen(BOOTDEV_PROP_NAME) + 1,
bdev);
if (ioctl(fd, OPROMSETOPT, pio) < 0) {
perror(MSGSTR(6008, "openprom setopt ioctl"));
return (errno);
}
/* read back the value that was set */
pio->oprom_size = MAXVALSIZE;
(void) strcpy(pio->oprom_array, BOOTDEV_PROP_NAME);
if (ioctl(fd, OPROMGETOPT, pio) < 0) {
perror(MSGSTR(6009, "openprom getopt ioctl"));
return (errno);
}
if (strcmp(bdev, pio->oprom_array)) {
/* could not set the new device name, set the old one back */
perror(MSGSTR(6010,
"Could not set boot-device, reverting to old value"));
pio->oprom_size = (int)strlen(BOOTDEV_PROP_NAME) + 1 +
(int)strlen(save_bootdev);
(void) strcpy(pio->oprom_array, BOOTDEV_PROP_NAME);
(void) strcpy(pio->oprom_array +
(int)strlen(BOOTDEV_PROP_NAME) + 1,
save_bootdev);
if (ioctl(fd, OPROMSETOPT, pio) < 0) {
perror(MSGSTR(6011, "openprom setopt ioctl"));
return (errno);
}
}
(void) close(fd);
return (0);
}
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