filesystem mtime support for iso9660
This commit is contained in:
Vladimir 'phcoder' Serbinenko
parent
db64f5b167
commit
a2de6bf6ed
|
|
@ -27,6 +27,7 @@
|
|||
#include <grub/types.h>
|
||||
#include <grub/fshelp.h>
|
||||
#include <grub/charset.h>
|
||||
#include <grub/datetime.h>
|
||||
|
||||
#define GRUB_ISO9660_FSTYPE_DIR 0040000
|
||||
#define GRUB_ISO9660_FSTYPE_REG 0100000
|
||||
|
|
@ -153,6 +154,108 @@ struct grub_fshelp_node
|
|||
static grub_dl_t my_mod;
|
||||
|
||||
|
||||
#define SECPERMIN 60
|
||||
#define SECPERHOUR (60*SECPERMIN)
|
||||
#define SECPERDAY (24*SECPERHOUR)
|
||||
#define SECPERYEAR (365*SECPERDAY)
|
||||
#define SECPER4YEARS (4*SECPERYEAR+SECPERDAY)
|
||||
|
||||
static grub_err_t
|
||||
grub_datetime2unixtime (const struct grub_datetime *datetime, grub_int32_t *nix)
|
||||
{
|
||||
grub_int32_t ret;
|
||||
int y4, ay;
|
||||
grub_uint16_t monthssum[12]
|
||||
= { 0,
|
||||
31,
|
||||
31 + 28,
|
||||
31 + 28 + 31,
|
||||
31 + 28 + 31 + 30,
|
||||
31 + 28 + 31 + 30 + 31,
|
||||
31 + 28 + 31 + 30 + 31 + 30,
|
||||
31 + 28 + 31 + 30 + 31 + 30 + 31,
|
||||
31 + 28 + 31 + 30 + 31 + 30 + 31 + 31,
|
||||
31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
|
||||
31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
|
||||
31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30};
|
||||
grub_uint8_t months[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
|
||||
|
||||
if (datetime->year > 2038 || datetime->year < 1902)
|
||||
return grub_error (GRUB_ERR_OUT_OF_RANGE, "outside of UNIX epoch");
|
||||
if (datetime->month > 12 || datetime->month < 1)
|
||||
return grub_error (GRUB_ERR_BAD_NUMBER, "not a valid month");
|
||||
|
||||
/* In the period of validity of unixtime all years divisible by 4
|
||||
are bissextile*/
|
||||
/* Convenience: let's have 3 consecutive non-bissextile years
|
||||
at the beginning of the epoch. So count from 1973 instead of 1970 */
|
||||
ret = 3*SECPERYEAR + SECPERDAY;
|
||||
|
||||
/* Transform C divisions and modulos to mathematical ones */
|
||||
y4 = (datetime->year - 1973) / 4;
|
||||
if (datetime->year < 1973)
|
||||
y4--;
|
||||
ay = datetime->year - 1973 - 4 * y4;
|
||||
ret += y4 * SECPER4YEARS;
|
||||
ret += ay * SECPERYEAR;
|
||||
|
||||
ret += monthssum[datetime->month - 1] * SECPERDAY;
|
||||
if (ay == 0 && datetime->month >= 3)
|
||||
ret += SECPERDAY;
|
||||
|
||||
ret += (datetime->day - 1) * SECPERDAY;
|
||||
if ((datetime->day > months[datetime->month - 1]
|
||||
&& (!ay || datetime->month != 2 || datetime->day != 29))
|
||||
|| datetime->day < 1)
|
||||
return grub_error (GRUB_ERR_BAD_NUMBER, "invalid day");
|
||||
|
||||
ret += datetime->hour * SECPERHOUR;
|
||||
if (datetime->hour > 23)
|
||||
return grub_error (GRUB_ERR_BAD_NUMBER, "invalid hour");
|
||||
ret += datetime->minute * 60;
|
||||
if (datetime->minute > 59)
|
||||
return grub_error (GRUB_ERR_BAD_NUMBER, "invalid minute");
|
||||
|
||||
ret += datetime->second;
|
||||
/* Accept leap seconds. */
|
||||
if (datetime->second > 60)
|
||||
return grub_error (GRUB_ERR_BAD_NUMBER, "invalid second");
|
||||
|
||||
if ((datetime->year > 1980 && ret < 0)
|
||||
|| (datetime->year < 1960 && ret > 0))
|
||||
return grub_error (GRUB_ERR_OUT_OF_RANGE, "outside of UNIX epoch");
|
||||
*nix = ret;
|
||||
return GRUB_ERR_NONE;
|
||||
}
|
||||
|
||||
static grub_err_t
|
||||
iso9660_to_unixtime (const struct grub_iso9660_date *i, grub_int32_t *nix)
|
||||
{
|
||||
grub_err_t err;
|
||||
struct grub_datetime datetime;
|
||||
|
||||
if (! i->year[0] && ! i->year[1]
|
||||
&& ! i->year[2] && ! i->year[3]
|
||||
&& ! i->month[0] && ! i->month[1]
|
||||
&& ! i->day[0] && ! i->day[1]
|
||||
&& ! i->hour[0] && ! i->hour[1]
|
||||
&& ! i->minute[0] && ! i->minute[1]
|
||||
&& ! i->second[0] && ! i->second[1]
|
||||
&& ! i->hundredth[0] && ! i->hundredth[1])
|
||||
return grub_error (GRUB_ERR_BAD_NUMBER, "empty date");
|
||||
datetime.year = (i->year[0] - '0') * 1000 + (i->year[1] - '0') * 100
|
||||
+ (i->year[2] - '0') * 10 + (i->year[3] - '0');
|
||||
datetime.month = (i->month[0] - '0') * 10 + (i->month[1] - '0');
|
||||
datetime.day = (i->day[0] - '0') * 10 + (i->day[1] - '0');
|
||||
datetime.hour = (i->hour[0] - '0') * 10 + (i->hour[1] - '0');
|
||||
datetime.minute = (i->minute[0] - '0') * 10 + (i->minute[1] - '0');
|
||||
datetime.second = (i->second[0] - '0') * 10 + (i->second[1] - '0');
|
||||
|
||||
err = grub_datetime2unixtime (&datetime, nix);
|
||||
*nix -= i->offset * 60 * 15;
|
||||
return err;
|
||||
}
|
||||
|
||||
/* Iterate over the susp entries, starting with block SUA_BLOCK on the
|
||||
offset SUA_POS with a size of SUA_SIZE bytes. Hook is called for
|
||||
every entry. */
|
||||
|
|
@ -871,6 +974,32 @@ grub_iso9660_uuid (grub_device_t device, char **uuid)
|
|||
return grub_errno;
|
||||
}
|
||||
|
||||
/* Get writing time of filesystem. */
|
||||
static grub_err_t
|
||||
grub_iso9660_mtime (grub_device_t device, grub_int32_t *timebuf)
|
||||
{
|
||||
struct grub_iso9660_data *data;
|
||||
grub_disk_t disk = device->disk;
|
||||
grub_err_t err;
|
||||
|
||||
grub_dl_ref (my_mod);
|
||||
|
||||
data = grub_iso9660_mount (disk);
|
||||
if (!data)
|
||||
{
|
||||
grub_dl_unref (my_mod);
|
||||
return grub_errno;
|
||||
}
|
||||
err = iso9660_to_unixtime (&data->voldesc.modified, timebuf);
|
||||
|
||||
grub_dl_unref (my_mod);
|
||||
|
||||
grub_free (data);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
static struct grub_fs grub_iso9660_fs =
|
||||
|
|
@ -882,6 +1011,7 @@ static struct grub_fs grub_iso9660_fs =
|
|||
.close = grub_iso9660_close,
|
||||
.label = grub_iso9660_label,
|
||||
.uuid = grub_iso9660_uuid,
|
||||
.mtime = grub_iso9660_mtime,
|
||||
.next = 0
|
||||
};
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue