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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <stddef.h>
#include <sys/mount.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <libvolume_id.h>
#include "blkdev.h"
#include "fsprobe.h"
#include "realpath.h"
#include "mount_paths.h"
#include "sundries.h"
enum probe_type {
VOLUME_ID_NONE,
VOLUME_ID_LABEL,
VOLUME_ID_UUID,
VOLUME_ID_TYPE,
};
static char
*probe(const char *device, enum probe_type type)
{
int fd;
uint64_t size;
struct volume_id *id;
const char *val;
char *value = NULL;
fd = open(device, O_RDONLY);
if (fd < 0)
return NULL;
id = volume_id_open_fd(fd);
if (!id) {
close(fd);
return NULL;
}
if (blkdev_get_size(fd, &size) != 0)
size = 0;
if (volume_id_probe_all(id, 0, size) == 0) {
switch(type) {
case VOLUME_ID_LABEL:
if (volume_id_get_label(id, &val))
value = xstrdup(val);
break;
case VOLUME_ID_UUID:
if (volume_id_get_uuid(id, &val))
value = xstrdup(val);
break;
case VOLUME_ID_TYPE:
if (volume_id_get_type(id, &val))
value = xstrdup(val);
break;
default:
break;
}
}
volume_id_close(id);
close(fd);
return value;
}
void
fsprobe_init(void)
{
}
void
fsprobe_exit(void)
{
}
int
fsprobe_known_fstype(const char *fstype)
{
if (volume_id_get_prober_by_type(fstype) != NULL)
return 1;
return 0;
}
const char *
fsprobe_get_uuid_by_devname(const char *devname)
{
return probe(devname, VOLUME_ID_UUID);
}
const char *
fsprobe_get_label_by_devname(const char *devname)
{
return probe(devname, VOLUME_ID_LABEL);
}
const char *
fsprobe_get_fstype_by_devname(const char *devname)
{
return probe(devname, VOLUME_ID_TYPE);
}
const char *
fsprobe_get_devname_by_uuid(const char *uuid)
{
char dev[PATH_MAX];
size_t len;
if (!uuid)
return NULL;
strcpy(dev, PATH_DEV_BYUUID "/");
len = strlen(PATH_DEV_BYUUID "/");
if (!volume_id_encode_string(uuid, &dev[len], sizeof(dev) - len) != 0)
return NULL;
return canonicalize(dev);
}
const char *
fsprobe_get_devname_by_label(const char *label)
{
char dev[PATH_MAX];
size_t len;
if (!label)
return NULL;
strcpy(dev, PATH_DEV_BYLABEL "/");
len = strlen(PATH_DEV_BYLABEL "/");
if (!volume_id_encode_string(label, &dev[len], sizeof(dev) - len) != 0)
return NULL;
return canonicalize(dev);
}
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