busybox/util-linux/volume_id/util.c
Denis Vlasenko c5b737231d volude_id: remove unused fields and functions which were setting them
function                                             old     new   delta
uuidcache_init                                       567     704    +137
findfs_main                                            -     125    +125
packed_usage                                       23662   23694     +32
static.drive_name_string                               -      14     +14
applet_names                                        1815    1822      +7
applet_main                                         1104    1108      +4
volume_id_open_node                                   35      38      +3
applet_nameofs                                       552     554      +2
get_devname_from_label                                78      79      +1
applet_install_loc                                   138     139      +1
volume_id_set_label_unicode16                         31      27      -4
volume_id_set_label_string                            74      70      -4
get_devname_from_uuid                                 63      59      -4
fs1                                                   12       8      -4
volume_id_set_unicode16                              209     202      -7
volume_id_free_buffer                                 71      56     -15
free_volume_id                                        52      37     -15
volume_id_probe_luks                                  97      79     -18
volume_id_set_usage_part                              21       -     -21
volume_id_probe_ufs                                  148     126     -22
volume_id_probe_lsi_mega_raid                        131     108     -23
volume_id_probe_highpoint_45x_raid                   127     104     -23
volume_id_probe_highpoint_37x_raid                    87      63     -24
volume_id_set_usage                                   28       -     -28
volume_id_probe_romfs                                121      93     -28
volume_id_set_label_raw                               30       -     -30
volume_id_probe_promise_fasttrack_raid               174     144     -30
volume_id_set_uuid                                   373     342     -31
volume_id_probe_xfs                                  122      91     -31
volume_id_probe_jfs                                  138     107     -31
volume_id_probe_ocfs2                                139     107     -32
volume_id_probe_lvm1                                  90      58     -32
volume_id_probe_cramfs                               106      63     -43
volume_id_probe_via_raid                             145     101     -44
volume_id_probe_intel_software_raid                  153     108     -45
volume_id_probe_minix                                121      74     -47
volume_id_probe_udf                                  682     632     -50
volume_id_probe_nvidia_raid                          158     108     -50
volume_id_probe_lvm2                                 128      78     -50
volume_id_probe_hpfs                                 117      67     -50
volume_id_probe_ext                                  143      93     -50
volume_id_probe_linux_raid                           191     139     -52
volume_id_probe_sysv                                 244     187     -57
volume_id_probe_silicon_medley_raid                  158      97     -61
usage_to_string                                       64       -     -64
volume_id_probe_linux_swap                           263     198     -65
volume_id_get_buffer                                 372     307     -65
volume_id_probe_iso9660                              412     332     -80
volume_id_probe_hfs_hfsplus                          888     806     -82
volume_id_probe_ntfs                                 396     294    -102
volume_id_probe_vfat                                 980     872    -108
volume_id_probe_reiserfs                             417     268    -149
dev_get_major_minor                                  175       -    -175
uuidcache_check_device                               692     499    -193
volume_id_probe_mac_partition_map                    697       -    -697
------------------------------------------------------------------------------
(add/remove: 2/6 grow/shrink: 8/39 up/down: 326/-2836)      Total: -2510 bytes
   text    data     bss     dec     hex filename
 797220     662    7420  805302   c49b6 busybox_old
 794244     662    7420  802326   c3e16 busybox_unstripped
2008-03-17 09:21:26 +00:00

264 lines
6.5 KiB
C

/*
* volume_id - reads filesystem label and uuid
*
* Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "volume_id_internal.h"
void volume_id_set_unicode16(char *str, size_t len, const uint8_t *buf, enum endian endianess, size_t count)
{
unsigned i, j;
unsigned c;
j = 0;
for (i = 0; i + 2 <= count; i += 2) {
if (endianess == LE)
c = (buf[i+1] << 8) | buf[i];
else
c = (buf[i] << 8) | buf[i+1];
if (c == 0) {
str[j] = '\0';
break;
} else if (c < 0x80) {
if (j+1 >= len)
break;
str[j++] = (uint8_t) c;
} else if (c < 0x800) {
if (j+2 >= len)
break;
str[j++] = (uint8_t) (0xc0 | (c >> 6));
str[j++] = (uint8_t) (0x80 | (c & 0x3f));
} else {
if (j+3 >= len)
break;
str[j++] = (uint8_t) (0xe0 | (c >> 12));
str[j++] = (uint8_t) (0x80 | ((c >> 6) & 0x3f));
str[j++] = (uint8_t) (0x80 | (c & 0x3f));
}
}
str[j] = '\0';
}
#ifdef UNUSED
static const char *usage_to_string(enum volume_id_usage usage_id)
{
switch (usage_id) {
case VOLUME_ID_FILESYSTEM:
return "filesystem";
case VOLUME_ID_PARTITIONTABLE:
return "partitiontable";
case VOLUME_ID_OTHER:
return "other";
case VOLUME_ID_RAID:
return "raid";
case VOLUME_ID_DISKLABEL:
return "disklabel";
case VOLUME_ID_CRYPTO:
return "crypto";
case VOLUME_ID_UNPROBED:
return "unprobed";
case VOLUME_ID_UNUSED:
return "unused";
}
return NULL;
}
void volume_id_set_usage_part(struct volume_id_partition *part, enum volume_id_usage usage_id)
{
part->usage_id = usage_id;
part->usage = usage_to_string(usage_id);
}
void volume_id_set_usage(struct volume_id *id, enum volume_id_usage usage_id)
{
id->usage_id = usage_id;
id->usage = usage_to_string(usage_id);
}
void volume_id_set_label_raw(struct volume_id *id, const uint8_t *buf, size_t count)
{
memcpy(id->label_raw, buf, count);
id->label_raw_len = count;
}
#endif
#ifdef NOT_NEEDED
static size_t strnlen(const char *s, size_t maxlen)
{
size_t i;
if (!maxlen) return 0;
if (!s) return 0;
for (i = 0; *s && i < maxlen; ++s) ++i;
return i;
}
#endif
void volume_id_set_label_string(struct volume_id *id, const uint8_t *buf, size_t count)
{
unsigned i;
memcpy(id->label, buf, count);
/* remove trailing whitespace */
i = strnlen(id->label, count);
while (i--) {
if (!isspace(id->label[i]))
break;
}
id->label[i+1] = '\0';
}
void volume_id_set_label_unicode16(struct volume_id *id, const uint8_t *buf, enum endian endianess, size_t count)
{
volume_id_set_unicode16(id->label, sizeof(id->label), buf, endianess, count);
}
void volume_id_set_uuid(struct volume_id *id, const uint8_t *buf, enum uuid_format format)
{
unsigned i;
unsigned count = 0;
switch (format) {
case UUID_DOS:
count = 4;
break;
case UUID_NTFS:
case UUID_HFS:
count = 8;
break;
case UUID_DCE:
count = 16;
break;
case UUID_DCE_STRING:
/* 36 is ok, id->uuid has one extra byte for NUL */
count = VOLUME_ID_UUID_SIZE;
break;
}
// memcpy(id->uuid_raw, buf, count);
// id->uuid_raw_len = count;
/* if set, create string in the same format, the native platform uses */
for (i = 0; i < count; i++)
if (buf[i] != 0)
goto set;
return; /* all bytes are zero, leave it empty ("") */
set:
switch (format) {
case UUID_DOS:
sprintf(id->uuid, "%02X%02X-%02X%02X",
buf[3], buf[2], buf[1], buf[0]);
break;
case UUID_NTFS:
sprintf(id->uuid,"%02X%02X%02X%02X%02X%02X%02X%02X",
buf[7], buf[6], buf[5], buf[4],
buf[3], buf[2], buf[1], buf[0]);
break;
case UUID_HFS:
sprintf(id->uuid,"%02X%02X%02X%02X%02X%02X%02X%02X",
buf[0], buf[1], buf[2], buf[3],
buf[4], buf[5], buf[6], buf[7]);
break;
case UUID_DCE:
sprintf(id->uuid,
"%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
buf[0], buf[1], buf[2], buf[3],
buf[4], buf[5],
buf[6], buf[7],
buf[8], buf[9],
buf[10], buf[11], buf[12], buf[13], buf[14],buf[15]);
break;
case UUID_DCE_STRING:
memcpy(id->uuid, buf, count);
id->uuid[count] = '\0';
break;
}
}
void *volume_id_get_buffer(struct volume_id *id, uint64_t off, size_t len)
{
ssize_t buf_len;
dbg("get buffer off 0x%llx(%llu), len 0x%zx", (unsigned long long) off, (unsigned long long) off, len);
/* check if requested area fits in superblock buffer */
if (off + len <= SB_BUFFER_SIZE) {
if (id->sbbuf == NULL) {
id->sbbuf = xmalloc(SB_BUFFER_SIZE);
}
/* check if we need to read */
if ((off + len) > id->sbbuf_len) {
dbg("read sbbuf len:0x%llx", (unsigned long long) (off + len));
xlseek(id->fd, 0, SEEK_SET);
buf_len = full_read(id->fd, id->sbbuf, off + len);
if (buf_len < 0) {
dbg("read failed (%s)", strerror(errno));
return NULL;
}
dbg("got 0x%zx (%zi) bytes", buf_len, buf_len);
id->sbbuf_len = buf_len;
if (buf_len < off + len) {
dbg("requested 0x%zx bytes, got only 0x%zx bytes", len, buf_len);
return NULL;
}
}
return &(id->sbbuf[off]);
}
if (len > SEEK_BUFFER_SIZE) {
dbg("seek buffer too small %d", SEEK_BUFFER_SIZE);
return NULL;
}
/* get seek buffer */
if (id->seekbuf == NULL) {
id->seekbuf = xmalloc(SEEK_BUFFER_SIZE);
}
/* check if we need to read */
if ((off < id->seekbuf_off) || ((off + len) > (id->seekbuf_off + id->seekbuf_len))) {
dbg("read seekbuf off:0x%llx len:0x%zx", (unsigned long long) off, len);
xlseek(id->fd, off, SEEK_SET);
buf_len = full_read(id->fd, id->seekbuf, len);
if (buf_len < 0) {
dbg("read failed (%s)", strerror(errno));
return NULL;
}
dbg("got 0x%zx (%zi) bytes", buf_len, buf_len);
id->seekbuf_off = off;
id->seekbuf_len = buf_len;
if (buf_len < len) {
dbg("requested 0x%zx bytes, got only 0x%zx bytes", len, buf_len);
return NULL;
}
}
return &(id->seekbuf[off - id->seekbuf_off]);
}
void volume_id_free_buffer(struct volume_id *id)
{
free(id->sbbuf);
id->sbbuf = NULL;
id->sbbuf_len = 0;
free(id->seekbuf);
id->seekbuf = NULL;
id->seekbuf_len = 0;
}