2 #include <sys/utsname.h>
4 #include "superblocks.h"
5 #include "linux_version.h"
8 #define DEBUG(fmt, ...) printf(fmt, __VA_ARGS__)
10 #define DEBUG(fmt, ...)
13 int blkid_debug_mask
= 0;
15 static unsigned char *probe_buffer
;
16 static unsigned int probe_buffer_size
= 0;
18 int get_linux_version (void)
32 n
= sscanf(uts
.release
, "%d.%d.%d", &major
, &minor
, &teeny
);
36 return kver
= KERNEL_VERSION(major
, minor
, teeny
);
39 int blkid_probe_is_tiny(blkid_probe pr
)
45 int blkid_probe_set_value(blkid_probe pr
, const char *name
,
46 unsigned char *data
, size_t len
)
52 int blkid_probe_set_version(blkid_probe pr
, const char *version
)
54 int len
= strlen(version
);
55 if (len
> (sizeof(pr
->version
) - 1)) {
56 fprintf(stderr
, "version buffer too small %d\n", len
);
60 strncpy(pr
->version
, version
, sizeof(pr
->version
));
65 int blkid_probe_sprintf_version(blkid_probe pr
, const char *fmt
, ...)
71 n
= vsnprintf(pr
->version
, sizeof(pr
->version
), fmt
, ap
);
74 if (n
>= sizeof(pr
->version
))
75 fprintf(stderr
, "version buffer too small %d\n", n
);
80 unsigned char *blkid_probe_get_buffer(blkid_probe pr
,
81 blkid_loff_t off
, blkid_loff_t len
)
86 if (len
> probe_buffer_size
) {
87 buf
= realloc(probe_buffer
, len
);
90 fprintf(stderr
, "failed to allocate %d byte buffer\n",
97 probe_buffer_size
= len
;
100 memset(probe_buffer
, 0, probe_buffer_size
);
102 lseek(pr
->fd
, off
, SEEK_SET
);
103 ret
= read(pr
->fd
, probe_buffer
, len
);
106 fprintf(stderr
, "faile to read blkid\n");
111 int blkid_probe_set_label(blkid_probe pr
, unsigned char *label
, size_t len
)
113 if (len
> (sizeof(pr
->label
) - 1)) {
114 fprintf(stderr
, "label buffer too small %d > %d\n",
115 (int) len
, (int) sizeof(pr
->label
) - 1);
118 memcpy(pr
->label
, label
, len
+ 1);
123 int blkid_probe_set_uuid_as(blkid_probe pr
, unsigned char *uuid
, const char *name
)
125 short unsigned int*u
= (short unsigned int*) uuid
;
129 "%04x%04x-%04x-%04x-%04x-%04x%04x%04x",
130 be16_to_cpu(u
[0]), be16_to_cpu(u
[1]), be16_to_cpu(u
[2]), be16_to_cpu(u
[3]),
131 be16_to_cpu(u
[4]), be16_to_cpu(u
[5]), be16_to_cpu(u
[6]), be16_to_cpu(u
[7]));
133 strncpy(pr
->name
, name
, sizeof(pr
->name
));
138 int blkid_probe_set_uuid(blkid_probe pr
, unsigned char *uuid
)
140 return blkid_probe_set_uuid_as(pr
, uuid
, NULL
);
143 int blkid_probe_sprintf_uuid(blkid_probe pr
, unsigned char *uuid
,
144 size_t len
, const char *fmt
, ...)
149 vsnprintf(pr
->uuid
, sizeof(pr
->uuid
), fmt
, ap
);
155 static const struct blkid_idinfo
*idinfos
[] =
173 int probe_block(char *block
, struct blkid_struct_probe
*pr
)
178 if (stat(block
, &s
) || (!S_ISBLK(s
.st_mode
) && !S_ISREG(s
.st_mode
) && !strncmp(block
, "ubi", 3)))
182 pr
->fd
= open(block
, O_RDONLY
);
186 for (i
= 0; i
< ARRAY_SIZE(idinfos
); i
++) {
187 /* loop over all magic handlers */
188 const struct blkid_idmag
*mag
;
190 /* loop over all probe handlers */
191 DEBUG("scanning %s\n", idinfos
[i
]->name
);
193 mag
= &idinfos
[i
]->magics
[0];
196 int off
= (mag
->kboff
* 1024) + mag
->sboff
;
197 char magic
[32] = { 0 };
199 lseek(pr
->fd
, off
, SEEK_SET
);
200 read(pr
->fd
, magic
, mag
->len
);
202 DEBUG("magic: %s %s %d\n", mag
->magic
, magic
, mag
->len
);
203 if (!memcmp(mag
->magic
, magic
, mag
->len
))
208 if (mag
&& mag
->magic
) {
209 DEBUG("probing %s\n", idinfos
[i
]->name
);
210 pr
->err
= idinfos
[i
]->probefunc(pr
, mag
);
212 strcpy(pr
->dev
, block
);