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fdisk: sanitize partition name printing; drop "Code" column; get rid of one static var

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function                                             old     new   delta
list_table                                          2335    2373     +38
fill_bounds                                          131     128      -3
part_array_len                                         4       -      -4
get_boot                                            1584    1574     -10
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 1/2 up/down: 38/-17)             Total: 21 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2016-11-27 06:13:43 +01:00
parent 351ab8278e
commit 29516ac0e4
2 changed files with 42 additions and 15 deletions
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1
util-linux/fdisk.c
View File

@ -121,6 +121,7 @@
# define BLKGETSIZE64 _IOR(0x12,114,size_t)
#endif
#include "libbb.h"
#include "unicode.h"
#if BB_LITTLE_ENDIAN
# define inline_if_little_endian ALWAYS_INLINE

56
util-linux/fdisk_gpt.c
View File

@ -36,14 +36,13 @@ typedef struct {
uint64_t lba_start;
uint64_t lba_end;
uint64_t flags;
uint16_t name[36];
uint16_t name36[36];
} gpt_partition;
static gpt_header *gpt_hdr;
static char *part_array;
static unsigned int n_parts;
static unsigned int part_array_len;
static unsigned int part_entry_len;
static inline gpt_partition *
@ -73,18 +72,34 @@ gpt_print_guid(uint8_t *buf)
buf[10], buf[11], buf[12], buf[13], buf[14], buf[15]);
}
/* TODO: real unicode support */
static void
gpt_print_wide(uint16_t *s, int max_len)
gpt_print_wide36(uint16_t *s)
{
#if ENABLE_UNICODE_SUPPORT
char buf[37 * 4];
wchar_t wc[37];
int i = 0;
while (i < max_len) {
if (*s == 0)
return;
fputc(*s, stdout);
s++;
while (i < ARRAY_SIZE(wc)-1) {
if (s[i] == 0)
break;
wc[i] = s[i];
i++;
}
wc[i] = 0;
if (wcstombs(buf, wc, sizeof(buf)) <= sizeof(buf)-1)
fputs(printable_string(NULL, buf), stdout);
#else
char buf[37];
int i = 0;
while (i < ARRAY_SIZE(buf)-1) {
if (s[i] == 0)
break;
buf[i] = (s[i] < 0x7f) ? s[i] : '?';
i++;
}
buf[i] = '\0';
fputs(printable_string(NULL, buf), stdout);
#endif
}
static void
@ -106,19 +121,28 @@ gpt_list_table(int xtra UNUSED_PARAM)
(unsigned long long)SWAP_LE64(gpt_hdr->first_usable_lba),
(unsigned long long)SWAP_LE64(gpt_hdr->last_usable_lba));
puts("Number Start (sector) End (sector) Size Code Name");
/* "GPT fdisk" has a concept of 16-bit extension of the original MBR 8-bit type codes,
* which it displays here: its output columns are ... Size Code Name
* They are their own invention and are not stored on disk.
* Looks like they use them to support "hybrid" GPT: for example, they have
* AddType(0x8307, "69DAD710-2CE4-4E3C-B16C-21A1D49ABED3", "Linux ARM32 root (/)");
* and then (code>>8) matches what you need to put into MBR's type field for such a partition.
* To print those codes, we'd need a GUID lookup table. Lets just drop the "Code" column instead:
*/
puts("Number Start (sector) End (sector) Size Name");
// 123456 123456789012345 123456789012345 12345 abc
for (i = 0; i < n_parts; i++) {
gpt_partition *p = gpt_part(i);
if (p->lba_start) {
smart_ulltoa5((1 + SWAP_LE64(p->lba_end) - SWAP_LE64(p->lba_start)) * sector_size,
numstr6, " KMGTPEZY")[0] = '\0';
printf("%4u %15llu %15llu %11s %04x ",
printf("%6u %15llu %15llu %s ",
i + 1,
(unsigned long long)SWAP_LE64(p->lba_start),
(unsigned long long)SWAP_LE64(p->lba_end),
numstr6,
0x0700 /* FIXME */);
gpt_print_wide(p->name, 18);
numstr6
);
gpt_print_wide36(p->name36);
bb_putchar('\n');
}
}
@ -127,6 +151,7 @@ gpt_list_table(int xtra UNUSED_PARAM)
static int
check_gpt_label(void)
{
unsigned part_array_len;
struct partition *first = pt_offset(MBRbuffer, 0);
struct pte pe;
uint32_t crc;
@ -150,6 +175,7 @@ check_gpt_label(void)
return 0;
}
init_unicode();
if (!global_crc32_table) {
global_crc32_table = crc32_filltable(NULL, 0);
}