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[] =
172 int probe_block(char *block, struct blkid_struct_probe *pr)
177 if (stat(block, &s) || (!S_ISBLK(s.st_mode) && !S_ISREG(s.st_mode) && !strncmp(block, "ubi", 3)))
181 pr->fd = open(block, O_RDONLY);
185 for (i = 0; i < ARRAY_SIZE(idinfos); i++) {
186 /* loop over all magic handlers */
187 const struct blkid_idmag *mag;
189 /* loop over all probe handlers */
190 DEBUG("scanning %s\n", idinfos[i]->name);
192 mag = &idinfos[i]->magics[0];
195 int off = (mag->kboff * 1024) + mag->sboff;
196 char magic[32] = { 0 };
198 lseek(pr->fd, off, SEEK_SET);
199 read(pr->fd, magic, mag->len);
201 DEBUG("magic: %s %s %d\n", mag->magic, magic, mag->len);
202 if (!memcmp(mag->magic, magic, mag->len))
207 if (mag && mag->magic) {
208 DEBUG("probing %s\n", idinfos[i]->name);
209 pr->err = idinfos[i]->probefunc(pr, mag);
211 strcpy(pr->dev, block);