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#include <stdio.h>
#include <sys/utsname.h>
#include "libblkid-tiny.h"
#include "superblocks.h"
#include "linux_version.h"
#if 0
#define DEBUG(fmt, ...) printf(fmt, __VA_ARGS__)
#else
#define DEBUG(fmt, ...)
#endif
int blkid_debug_mask = 0;
int get_linux_version (void)
{
static int kver = -1;
struct utsname uts;
int major = 0;
int minor = 0;
int teeny = 0;
int n;
if (kver != -1)
return kver;
if (uname (&uts))
return kver = 0;
n = sscanf(uts.release, "%d.%d.%d", &major, &minor, &teeny);
if (n < 1 || n > 3)
return kver = 0;
return kver = KERNEL_VERSION(major, minor, teeny);
}
int blkid_probe_is_tiny(blkid_probe pr)
{
/* never true ? */
return 0;
}
int blkid_probe_set_value(blkid_probe pr, const char *name,
unsigned char *data, size_t len)
{
/* empty stub */
return 0;
}
int blkid_probe_set_version(blkid_probe pr, const char *version)
{
int len = strlen(version);
if (len > (sizeof(pr->version) - 1)) {
fprintf(stderr, "version buffer too small %d\n", len);
return -1;
}
strncpy(pr->version, version, sizeof(pr->version));
return 0;
}
int blkid_probe_sprintf_version(blkid_probe pr, const char *fmt, ...)
{
va_list ap;
int n;
va_start(ap, fmt);
n = vsnprintf(pr->version, sizeof(pr->version), fmt, ap);
va_end(ap);
if (n >= sizeof(pr->version))
fprintf(stderr, "version buffer too small %d\n", n);
return 0;
}
unsigned char *blkid_probe_get_buffer(blkid_probe pr,
blkid_loff_t off, blkid_loff_t len)
{
struct blkid_bufinfo *bf;
int ret;
bf = malloc(sizeof(*bf) + len);
if (!bf)
return NULL;
memset(bf, 0, sizeof(*bf));
bf->data = ((unsigned char *)bf) + sizeof(*bf);
if (lseek(pr->fd, off, SEEK_SET) < 0) {
fprintf(stderr, "failed to seek\n");
free(bf);
return NULL;
}
ret = read(pr->fd, bf->data, len);
if (ret != len) {
fprintf(stderr, "failed to read blkid\n");
free(bf);
return NULL;
}
list_add_tail(&bf->bufs, &pr->buffers);
return bf->data;
}
int blkid_probe_set_id_label(blkid_probe pr, const char *name,
const unsigned char *data, size_t len)
{
return -ENOTSUP;
}
int blkid_probe_set_label(blkid_probe pr, unsigned char *label, size_t len)
{
if (len > (sizeof(pr->label) - 1)) {
fprintf(stderr, "label buffer too small %d > %d\n",
(int) len, (int) sizeof(pr->label) - 1);
return -1;
}
memcpy(pr->label, label, len + 1);
return 0;
}
int blkid_probe_set_utf8label(blkid_probe pr, unsigned char *label,
size_t len, int enc)
{
if (len > (sizeof(pr->label) - 1)) {
fprintf(stderr, "label buffer too small %d > %d\n",
(int) len, (int) sizeof(pr->label) - 1);
return -1;
}
blkid_encode_to_utf8(enc,(unsigned char*) pr->label, len,
label, len+1);
return 0;
}
int blkid_probe_set_uuid_as(blkid_probe pr, unsigned char *uuid, const char *name)
{
short unsigned int*u = (short unsigned int*) uuid;
if (u[0] && (!name || !strcmp(name, "UUID"))) {
sprintf(pr->uuid,
"%04x%04x-%04x-%04x-%04x-%04x%04x%04x",
be16_to_cpu(u[0]), be16_to_cpu(u[1]), be16_to_cpu(u[2]), be16_to_cpu(u[3]),
be16_to_cpu(u[4]), be16_to_cpu(u[5]), be16_to_cpu(u[6]), be16_to_cpu(u[7]));
}
return 0;
}
int blkid_probe_set_uuid(blkid_probe pr, unsigned char *uuid)
{
return blkid_probe_set_uuid_as(pr, uuid, NULL);
}
int blkid_probe_sprintf_uuid(blkid_probe pr, unsigned char *uuid,
size_t len, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vsnprintf(pr->uuid, sizeof(pr->uuid), fmt, ap);
va_end(ap);
return 0;
}
static const struct blkid_idinfo *idinfos[] =
{
&vfat_idinfo,
&swsuspend_idinfo,
&swap_idinfo,
&exfat_idinfo,
&ext4dev_idinfo,
&ext4_idinfo,
&ext3_idinfo,
&ext2_idinfo,
&jbd_idinfo,
&ntfs_idinfo,
&squashfs_idinfo,
&ubi_idinfo,
&ubifs_idinfo,
&jffs2_idinfo,
&hfsplus_idinfo,
&hfs_idinfo,
&btrfs_idinfo,
&f2fs_idinfo,
};
int probe_block(char *block, struct blkid_struct_probe *pr)
{
struct stat s;
int i;
if (stat(block, &s) || (!S_ISBLK(s.st_mode) && !S_ISREG(s.st_mode) && !strncmp(block, "ubi", 3)))
return -1;
pr->err = -1;
pr->fd = open(block, O_RDONLY);
if (pr->fd == -1)
return -1;
for (i = 0; i < ARRAY_SIZE(idinfos); i++) {
/* loop over all magic handlers */
const struct blkid_idmag *mag;
/* loop over all probe handlers */
DEBUG("scanning %s\n", idinfos[i]->name);
mag = &idinfos[i]->magics[0];
while (mag->magic) {
int off = (mag->kboff * 1024) + mag->sboff;
char magic[32] = { 0 };
if (lseek(pr->fd, off, SEEK_SET) < 0) {
close(pr->fd);
return -1;
}
if (read(pr->fd, magic, mag->len) < 0) {
close(pr->fd);
return -1;
}
DEBUG("magic: %s %s %d\n", mag->magic, magic, mag->len);
if (!memcmp(mag->magic, magic, mag->len))
break;
mag++;
}
if (mag && mag->magic) {
DEBUG("probing %s\n", idinfos[i]->name);
pr->err = idinfos[i]->probefunc(pr, mag);
pr->id = idinfos[i];
if (!pr->err)
break;
}
}
close(pr->fd);
return 0;
}
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