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EMILE/tools/emile.c

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/*
*
* (c) 2004 Laurent Vivier <LaurentVivier@wanadoo.fr>
*
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <getopt.h>
#include "libemile.h"
int verbose = 0;
extern void scanbus(void);
static char *first_path = PREFIX "/boot/emile/first_scsi";
static char *second_path = PREFIX "/boot/emile/second_scsi";
static char *kernel_path = PREFIX "/boot/vmlinuz";
static char *backup_path = NULL;
static char *partition = NULL;
static char *append_string = NULL;
static int buffer_size = 0;
enum {
ACTION_NONE = 0x00000000,
ACTION_SCANBUS = 0x00000001,
ACTION_SET_HFS = 0x00000002,
ACTION_RESTORE = 0x00000004,
ACTION_BACKUP = 0x00000008,
ACTION_SET_BUFFER = 0x00000010,
ACTION_TEST = 0x00000020,
ACTION_FIRST = 0x00000040,
ACTION_SECOND = 0x00000080,
ACTION_KERNEL = 0x00000100,
ACTION_PARTITION = 0x00000200,
ACTION_APPEND = 0x00000400,
};
enum {
ARG_NONE = 0,
ARG_SCANBUS,
ARG_SET_HFS,
ARG_RESTORE,
ARG_BACKUP,
ARG_APPEND = 'a',
ARG_VERBOSE ='v',
ARG_TEST = 't',
ARG_FIRST = 'f',
ARG_SECOND = 's',
ARG_KERNEL = 'k',
ARG_BUFFER = 'b',
ARG_PARTITION = 'p',
ARG_HELP = 'h',
};
static struct option long_options[] =
{
{"verbose", 0, NULL, ARG_VERBOSE },
{"first", 1, NULL, ARG_FIRST },
{"second", 1, NULL, ARG_SECOND },
{"kernel", 1, NULL, ARG_KERNEL },
{"buffer", 1, NULL, ARG_BUFFER },
{"partition", 1, NULL, ARG_PARTITION },
{"help", 0, NULL, ARG_HELP },
{"scanbus", 0, NULL, ARG_SCANBUS },
{"set-hfs", 0, NULL, ARG_SET_HFS },
{"restore", 2, NULL, ARG_RESTORE },
{"backup", 2, NULL, ARG_BACKUP },
{"test", 0, NULL, ARG_TEST },
{"append", 0, NULL, ARG_APPEND },
{NULL, 0, NULL, 0 }
};
static void usage(int argc, char** argv)
{
fprintf(stderr, "Usage: %s [OPTION]\n", argv[0]);
fprintf(stderr, "Update and install EMILE stuff on your SCSI disk.\n");
fprintf(stderr, "EMILE allows to boot linux directly from linux partition\n");
fprintf(stderr," -h, --help display this text\n");
fprintf(stderr," -v, --verbose active verbose mode\n");
fprintf(stderr," -t, --test active test mode (don't write to disk)\n");
fprintf(stderr," --scanbus display information about all disks and partitions\n");
fprintf(stderr," -f, --first PATH set path of EMILE first level\n");
fprintf(stderr," -s, --second PATH set path of EMILE second level\n");
fprintf(stderr," -k, --kernel PATH set path of kernel\n");
fprintf(stderr," -a, --append ARG set kernel command line\n");
fprintf(stderr," -p, --partition DEV define device where to install boot block\n");
fprintf(stderr," --restore[=FILE] save current boot block from FILE\n");
fprintf(stderr," --backup[=FILE] save current boot block to FILE\n");
fprintf(stderr," --set-hfs set type of partition DEV to Apple_HFS (needed to be bootable)\n");
fprintf(stderr, "\nUse \"--test\" to see default values\n");
fprintf(stderr, "!!! USE WITH CAUTION AND AT YOUR OWN RISK !!!\n");
fprintf(stderr, "\nbuild: \n%s\n", SIGNATURE);
}
static int open_map_of( char *dev_name, int flags,
emile_map_t **map, int *partition)
{
int ret;
int disk;
char disk_name[16];
char *driver;
ret = emile_scsi_get_rdev(dev_name, &driver, &disk, partition);
if (ret == -1)
return -1;
sprintf(disk_name, "%s%c", driver, 'a' + disk);
*map = emile_map_open(disk_name, flags);
if (*map == NULL)
return -1;
return 0;
}
static int check_has_apple_driver(char *dev_name)
{
emile_map_t *map;
int partition;
int ret;
ret = open_map_of(dev_name, O_RDONLY, &map, &partition);
if (ret == -1)
return -1;
ret = emile_map_has_apple_driver(map);
emile_map_close(map);
return ret;
}
static int check_is_hfs(char *dev_name)
{
emile_map_t *map;
int ret;
int partition;
char *part_type;
ret = open_map_of(dev_name, O_RDONLY, &map, &partition);
if (ret == -1)
return -1;
ret = emile_map_read(map, partition - 1);
if (ret == -1)
return -1;
part_type = emile_map_get_partition_type(map);
ret = (strcmp("Apple_HFS", part_type) == 0);
emile_map_close(map);
return ret;
}
static int check_is_EMILE_bootblock(char *dev_name)
{
emile_map_t *map;
int ret;
int partition;
char bootblock[BOOTBLOCK_SIZE];
int bootblock_type;
ret = open_map_of(dev_name, O_RDONLY, &map, &partition);
if (ret == -1)
return -1;
ret = emile_map_read(map, partition - 1);
if (ret == -1)
return -1;
ret = emile_map_bootblock_read(map, bootblock);
if (ret == -1)
return -1;
bootblock_type = emile_map_bootblock_get_type(bootblock);
emile_map_close(map);
return EMILE_BOOTBLOCK == bootblock_type;
}
static int backup_bootblock(char *dev_name, char *filename)
{
emile_map_t *map;
int ret;
int partition;
char bootblock[BOOTBLOCK_SIZE];
int fd;
ret = open_map_of(dev_name, O_RDONLY, &map, &partition);
if (ret == -1)
return -1;
ret = emile_map_read(map, partition - 1);
if (ret == -1)
return -1;
ret = emile_map_bootblock_read(map, bootblock);
if (ret == -1)
return -1;
emile_map_close(map);
/* save bootblock */
fd = open(filename, O_CREAT | O_EXCL | O_WRONLY, S_IRUSR | S_IWUSR);
if (fd == -1)
{
if (errno == EEXIST)
{
fprintf(stderr, "ERROR: \"%s\" already exists.\n",
filename);
}
return -1;
}
ret = write(fd, bootblock, BOOTBLOCK_SIZE);
if (ret != BOOTBLOCK_SIZE)
return -1;
close(fd);
return 0;
}
static int restore_bootblock(char *dev_name, char *filename)
{
emile_map_t *map;
int ret;
int partition;
char bootblock[BOOTBLOCK_SIZE];
int fd;
if (!check_is_EMILE_bootblock(dev_name))
{
fprintf(stderr, "ERROR: cannot restore bootblock over non-EMILE bootblock\n");
return -1;
}
/* read bootblock */
fd = open(filename, O_RDONLY);
if (fd == -1)
return -1;
ret = read(fd, bootblock, BOOTBLOCK_SIZE);
if (ret != BOOTBLOCK_SIZE)
return -1;
close(fd);
/* write bootblock */
ret = open_map_of(dev_name, O_RDWR, &map, &partition);
if (ret == -1)
return -1;
ret = emile_map_read(map, partition - 1);
if (ret == -1)
return -1;
ret = emile_map_bootblock_write(map, bootblock);
if (ret == -1)
return -1;
emile_map_close(map);
return 0;
}
static int copy_file_to_bootblock(char* first_path, char* dev_name)
{
emile_map_t *map;
int ret;
int partition;
char bootblock[BOOTBLOCK_SIZE];
int fd;
/* read first level */
fd = open(first_path, O_RDONLY);
if (fd == -1)
return -1;
ret = read(fd, bootblock, BOOTBLOCK_SIZE);
if (ret != BOOTBLOCK_SIZE)
return -1;
close(fd);
/* write bootblock to partition */
ret = open_map_of(dev_name, O_RDWR, &map, &partition);
if (ret == -1)
return -1;
ret = emile_map_read(map, partition - 1);
if (ret == -1)
return -1;
ret = emile_map_bootblock_write(map, bootblock);
if (ret == -1)
return -1;
emile_map_close(map);
return 0;
}
static int set_HFS(char *dev_name)
{
emile_map_t *map;
int ret;
int partition;
ret = open_map_of(dev_name, O_RDWR, &map, &partition);
if (ret == -1)
return -1;
ret = emile_map_read(map, partition - 1);
if (ret == -1)
return -1;
ret = emile_map_set_partition_type(map, "Apple_HFS");
if (ret == -1)
return -1;
ret = emile_map_partition_set_bootable(map, 1);
if (ret == -1)
return -1;
ret = emile_map_write(map, partition - 1);
if (ret == -1)
return -1;
emile_map_close(map);
return 0;
}
int main(int argc, char **argv)
{
int ret;
int c;
int option_index = 0;
char tmp_partition[16];
char tmp_append[512];
int fd;
int action = ACTION_NONE;
while(1)
{
c = getopt_long(argc, argv, "vhtf:a:s:k:b:", long_options, &option_index);
if (c == -1)
break;
switch(c)
{
case ARG_VERBOSE:
verbose++;
break;
case ARG_HELP:
usage(argc, argv);
return 0;
case ARG_SCANBUS:
action |= ACTION_SCANBUS;
break;
case ARG_FIRST:
action |= ACTION_FIRST;
first_path = optarg;
break;
case ARG_SECOND:
action |= ACTION_SECOND;
second_path = optarg;
break;
case ARG_KERNEL:
action |= ACTION_KERNEL;
kernel_path = optarg;
break;
case ARG_BUFFER:
action |= ACTION_SET_BUFFER;
buffer_size = atoi(optarg);
break;
case ARG_PARTITION:
action |= ACTION_PARTITION;
partition = optarg;
break;
case ARG_SET_HFS:
action |= ACTION_SET_HFS;
break;
case ARG_RESTORE:
action |= ACTION_RESTORE;
if (optarg != NULL)
backup_path = optarg;
else
backup_path = PREFIX "/boot/emile/bootblock.backup";
break;
case ARG_BACKUP:
action |= ACTION_BACKUP;
if (optarg != NULL)
backup_path = optarg;
else
backup_path = PREFIX "/boot/emile/bootblock.backup";
break;
case ARG_APPEND:
action |= ACTION_APPEND;
append_string = optarg;
break;
case ARG_TEST:
action |= ACTION_TEST;
break;
default:
fprintf(stderr, "ERROR: unknown option %s (%d, %c)\n",
argv[optind], c, c);
return 1;
}
}
if (action & ACTION_SCANBUS) {
if (action & ~ACTION_SCANBUS) {
fprintf(stderr,
"ERROR: \"--scanbus\" cannot be used with other arguments\n");
return 1;
}
scanbus();
return 0;
}
/* seek first HFS partition */
if (partition == NULL)
{
int fd;
char dev_name[16];
emile_map_t* map;
char *part_type;
int i;
char *driver;
int disk;
int partnb;
fd = open(second_path, O_RDONLY);
if (fd == -1)
{
fprintf(stderr, "ERROR: cannot open \"%s\"\n",
second_path);
return 2;
}
ret = emile_scsi_get_dev(fd, &driver, &disk, &partnb);
if (ret == -1)
{
fprintf(stderr,"ERROR: cannot find device of \"%s\"\n",
second_path);
return 2;
}
close(fd);
sprintf(dev_name, "%s%c", driver, disk + 'a');
/* ROM boots on the first HFS partition it finds */
map = emile_map_open(dev_name, O_RDONLY);
if (map == NULL)
{
fprintf(stderr, "ERROR: cannot open partition map\n");
return 2;
}
for (i = 0; i < emile_map_get_number(map); i++)
{
ret = emile_map_read(map, i);
if (ret == -1)
break;
part_type = emile_map_get_partition_type(map);
if (strcmp(part_type, "Apple_HFS") == 0)
{
sprintf(tmp_partition, "%s%d", dev_name, i + 1);
partition = tmp_partition;
break;
}
}
emile_map_close(map);
}
/* if there is no HFS partition, we'll use the partition
* where there is second_scsi (/boot or /)
*/
if (partition == NULL)
{
int fd;
char *driver;
int disk;
int partnb;
fd = open(second_path, O_RDONLY);
if (fd == -1)
return 2;
ret = emile_scsi_get_dev(fd, &driver, &disk, &partnb);
if (ret == 0)
{
sprintf(tmp_partition,
"%s%c%d", driver, disk + 'a', partnb);
partition = tmp_partition;
}
close(fd);
}
if (partition == NULL)
{
fprintf(stderr,
"ERROR: you must specify a partition to set EMILE bootblock\n");
fprintf(stderr,
" you can have the list of available partitions with \"--scanbus\".\n");
return 3;
}
if (action & ACTION_RESTORE)
{
if (action & ~(ACTION_RESTORE | ACTION_PARTITION))
{
fprintf(stderr,
"ERROR: \"--restore\" cannot be used with other arguments\n");
return 13;
}
ret = restore_bootblock(partition, backup_path);
if (ret == -1)
{
fprintf(stderr,
"ERROR: cannot restore bootblock %s from %s\n",
partition, backup_path);
return 14;
}
printf("Bootblock restore successfully done.\n");
return 0;
}
if (append_string == NULL)
{
char *driver;
int disk;
int partnb;
fd = open(second_path, O_RDONLY);
if (fd == -1)
{
fprintf(stderr, "ERROR: cannot open \"%s\"\n",
second_path);
return 2;
}
ret = emile_scsi_get_dev(fd, &driver, &disk, &partnb);
if (ret == -1)
{
fprintf(stderr,"ERROR: cannot find device of \"%s\"\n",
second_path);
return 2;
}
close(fd);
sprintf(tmp_append, "root=%s%c%d", driver, disk + 'a', partnb);
append_string = tmp_append;
}
ret = check_has_apple_driver(partition);
if (ret == -1)
{
fprintf(stderr, "ERROR: cannot check if Apple_Driver exists\n");
fprintf(stderr, " you should try as root\n");
if ((action & ACTION_TEST) == 0)
return 4;
}
if (ret == 0)
{
fprintf(stderr,
"ERROR: to be bootable a disk must have an Apple Driver on it\n");
fprintf(stderr,
" You must partition this disk with Apple Disk utility\n");
fprintf(stderr,
" or wait a release of EMILE allowing you to add this driver\n");
if ((action & ACTION_TEST) == 0)
return 5;
}
ret = check_is_hfs(partition);
if (ret == -1)
{
fprintf(stderr,
"ERROR: cannot check if partition is Apple_HFS\n");
fprintf(stderr, " you should try as root\n");
if ((action & ACTION_TEST) == 0)
return 6;
}
if ( (ret == 0) && (action & ACTION_SET_HFS) )
{
fprintf(stderr,
"ERROR: to be bootable a partition must be of type Apple_HFS\n");
fprintf(stderr,
" you can change it to Apple_HFS using \"--set-hfs\" argument\n");
if ((action & ACTION_TEST) == 0)
return 7;
}
ret = check_is_EMILE_bootblock(partition);
if (ret == -1)
{
fprintf(stderr, "ERROR: cannot check bootblock type\n");
fprintf(stderr, " you should try as root\n");
if ((action & ACTION_TEST) == 0)
return 8;
}
if ( (ret == 0) && ((action & ACTION_BACKUP) == 0) )
{
fprintf(stderr,
"ERROR: there is already a bootblock on \"%s\"\n", partition);
fprintf(stderr,
" you must use \"--backup\" to save it\n");
if ((action & ACTION_TEST) == 0)
return 9;
}
if ((action & ACTION_SET_BUFFER) == 0)
{
buffer_size = emile_get_uncompressed_size(kernel_path);
if (buffer_size == 0)
{
buffer_size = emile_file_get_size(kernel_path);
}
else if (buffer_size == -1)
{
fprintf(stderr,
"ERROR: cannot compute size of uncompressed kernel\n");
fprintf(stderr,
" use \"--buffer <size>\" to set it or set path of gzip in PATH\n");
fprintf(stderr,
" or check \"%s\" can be read\n", kernel_path);
if ((action & ACTION_TEST) == 0)
return 12;
}
}
if (action & ACTION_BACKUP)
{
if (action & ACTION_TEST)
{
fprintf(stderr,
"ERROR: \"--backup\" cannot be used with \"--test\"\n");
return 13;
}
ret = backup_bootblock(partition, backup_path);
if (ret == -1)
{
fprintf(stderr,
"ERROR: cannot backup bootblock %s to %s\n",
partition, backup_path);
return 14;
}
printf("Bootblock backup successfully done.\n");
}
printf("partition: %s\n", partition);
printf("first: %s\n", first_path);
printf("second: %s\n", second_path);
printf("kernel: %s\n", kernel_path);
printf("append: %s\n", append_string);
printf("buffer size: %d\n", buffer_size);
/* set kernel info into second level */
fd = open(second_path, O_RDWR);
if (fd == -1)
{
fprintf(stderr, "ERROR: cannot open \"%s\"\n",
second_path);
return 15;
}
if ((action & ACTION_TEST) == 0)
{
/* set kernel info */
ret = emile_second_set_kernel_scsi(fd, kernel_path);
if (ret == -1)
{
fprintf(stderr,
"ERROR: cannot set \"%s\" information in \"%s\".\n",
kernel_path, second_path);
return 16;
}
/* set buffer size */
lseek(fd, 0, SEEK_SET);
ret = emile_second_set_buffer_size(fd, buffer_size);
if (ret == -1)
{
fprintf(stderr,
"ERROR: cannot set buffer size in \"%s\".\n", second_path);
return 17;
}
/* set cmdline */
lseek(fd, 0, SEEK_SET);
ret = emile_second_set_cmdline(fd, append_string);
if (ret == -1)
{
fprintf(stderr,
"ERROR: cannot set append string \"%s\" in \"%s\".\n",
append_string, second_path);
return 18;
}
}
close(fd);
/* set second info in first level */
fd = open(first_path, O_RDWR);
if (fd == -1)
{
fprintf(stderr,
"ERROR: cannot open \"%s\".\n", first_path);
return 19;
}
if ((action & ACTION_TEST) == 0)
{
ret = emile_first_set_param_scsi(fd, second_path);
if (ret == -1)
{
fprintf(stderr,
"ERROR: cannot set \"%s\" information into \"%s\".\n",
second_path, first_path);
return 20;
}
}
close(fd);
if ((action & ACTION_TEST) == 0)
{
/* copy first level to boot block */
ret = copy_file_to_bootblock(first_path, partition);
if (ret == -1)
{
fprintf(stderr,
"ERROR: cannot write \"%s\" to bootblock of \"%s\".\n",
first_path, partition);
fprintf(stderr,
" %s\n", strerror(errno));
return 21;
}
/* set HFS if needed */
if (action & ACTION_SET_HFS)
{
ret = set_HFS(partition);
if (ret == -1)
{
fprintf( stderr,
"ERROR: cannot set partition type of \"%s\" to Apple_HFS.\n"
, partition);
return 22;
}
}
}
return 0;
}
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