7b52468a828500403a4642592a64bf452c1eb699
2 #include <sys/utsname.h>
4 #include "libblkid-tiny.h"
5 #include "superblocks.h"
6 #include "linux_version.h"
9 #define DEBUG(fmt, ...) printf(fmt, __VA_ARGS__)
11 #define DEBUG(fmt, ...)
14 int blkid_debug_mask
= 0;
16 static unsigned char *probe_buffer
;
17 static unsigned int probe_buffer_size
= 0;
19 int get_linux_version (void)
33 n
= sscanf(uts
.release
, "%d.%d.%d", &major
, &minor
, &teeny
);
37 return kver
= KERNEL_VERSION(major
, minor
, teeny
);
40 int blkid_probe_is_tiny(blkid_probe pr
)
46 int blkid_probe_set_value(blkid_probe pr
, const char *name
,
47 unsigned char *data
, size_t len
)
53 int blkid_probe_set_version(blkid_probe pr
, const char *version
)
55 int len
= strlen(version
);
56 if (len
> (sizeof(pr
->version
) - 1)) {
57 fprintf(stderr
, "version buffer too small %d\n", len
);
61 strncpy(pr
->version
, version
, sizeof(pr
->version
));
66 int blkid_probe_sprintf_version(blkid_probe pr
, const char *fmt
, ...)
72 n
= vsnprintf(pr
->version
, sizeof(pr
->version
), fmt
, ap
);
75 if (n
>= sizeof(pr
->version
))
76 fprintf(stderr
, "version buffer too small %d\n", n
);
81 unsigned char *blkid_probe_get_buffer(blkid_probe pr
,
82 blkid_loff_t off
, blkid_loff_t len
)
87 if (len
> probe_buffer_size
) {
88 buf
= realloc(probe_buffer
, len
);
91 fprintf(stderr
, "failed to allocate %d byte buffer\n",
98 probe_buffer_size
= len
;
101 memset(probe_buffer
, 0, probe_buffer_size
);
103 lseek(pr
->fd
, off
, SEEK_SET
);
104 ret
= read(pr
->fd
, probe_buffer
, len
);
107 fprintf(stderr
, "faile to read blkid\n");
112 int blkid_probe_set_label(blkid_probe pr
, unsigned char *label
, size_t len
)
114 if (len
> (sizeof(pr
->label
) - 1)) {
115 fprintf(stderr
, "label buffer too small %d > %d\n",
116 (int) len
, (int) sizeof(pr
->label
) - 1);
119 memcpy(pr
->label
, label
, len
+ 1);
124 int blkid_probe_set_uuid_as(blkid_probe pr
, unsigned char *uuid
, const char *name
)
126 short unsigned int*u
= (short unsigned int*) uuid
;
130 "%04x%04x-%04x-%04x-%04x-%04x%04x%04x",
131 be16_to_cpu(u
[0]), be16_to_cpu(u
[1]), be16_to_cpu(u
[2]), be16_to_cpu(u
[3]),
132 be16_to_cpu(u
[4]), be16_to_cpu(u
[5]), be16_to_cpu(u
[6]), be16_to_cpu(u
[7]));
134 strncpy(pr
->name
, name
, sizeof(pr
->name
));
139 int blkid_probe_set_uuid(blkid_probe pr
, unsigned char *uuid
)
141 return blkid_probe_set_uuid_as(pr
, uuid
, NULL
);
144 int blkid_probe_sprintf_uuid(blkid_probe pr
, unsigned char *uuid
,
145 size_t len
, const char *fmt
, ...)
150 vsnprintf(pr
->uuid
, sizeof(pr
->uuid
), fmt
, ap
);
156 static const struct blkid_idinfo
*idinfos
[] =
174 int probe_block(char *block
, struct blkid_struct_probe
*pr
)
179 if (stat(block
, &s
) || (!S_ISBLK(s
.st_mode
) && !S_ISREG(s
.st_mode
) && !strncmp(block
, "ubi", 3)))
183 pr
->fd
= open(block
, O_RDONLY
);
187 for (i
= 0; i
< ARRAY_SIZE(idinfos
); i
++) {
188 /* loop over all magic handlers */
189 const struct blkid_idmag
*mag
;
191 /* loop over all probe handlers */
192 DEBUG("scanning %s\n", idinfos
[i
]->name
);
194 mag
= &idinfos
[i
]->magics
[0];
197 int off
= (mag
->kboff
* 1024) + mag
->sboff
;
198 char magic
[32] = { 0 };
200 lseek(pr
->fd
, off
, SEEK_SET
);
201 if (read(pr
->fd
, magic
, mag
->len
) < 0)
204 DEBUG("magic: %s %s %d\n", mag
->magic
, magic
, mag
->len
);
205 if (!memcmp(mag
->magic
, magic
, mag
->len
))
210 if (mag
&& mag
->magic
) {
211 DEBUG("probing %s\n", idinfos
[i
]->name
);
212 pr
->err
= idinfos
[i
]->probefunc(pr
, mag
);
214 strcpy(pr
->dev
, block
);