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ar: add archive creation support

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function                                             old     new   delta
ar_main                                              184     542    +358
output_ar_header                                       -     166    +166
copy_data                                              -      54     +54
filter_replaceable                                     -      19     +19
get_header_ar                                        409     414      +5
header_verbose_list_ar                                85      88      +3
static.msg_unsupported_err                            28       -     -28
------------------------------------------------------------------------------
(add/remove: 3/1 grow/shrink: 3/0 up/down: 605/-28)           Total: 577 bytes

Signed-off-by: Alexander Shishkin <virtuoso@slind.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Alexander Shishkin
2010-03-15 15:38:09 +01:00
committed by Denys Vlasenko
parent 814da220a5
commit 535584c750
7 changed files with 263 additions and 42 deletions
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13
archival/libunarchive/get_header_ar.c
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@@ -6,6 +6,7 @@
#include "libbb.h"
#include "unarchive.h"
#include "ar.h"
static unsigned read_num(const char *str, int base)
{
@@ -23,15 +24,7 @@ char FAST_FUNC get_header_ar(archive_handle_t *archive_handle)
unsigned size;
union {
char raw[60];
struct {
char name[16];
char date[12];
char uid[6];
char gid[6];
char mode[8];
char size[10];
char magic[2];
} formatted;
struct ar_header formatted;
} ar;
#if ENABLE_FEATURE_AR_LONG_FILENAMES
static char *ar_long_names;
@@ -55,13 +48,13 @@ char FAST_FUNC get_header_ar(archive_handle_t *archive_handle)
}
archive_handle->offset += 60;
/* align the headers based on the header magic */
if (ar.formatted.magic[0] != '`' || ar.formatted.magic[1] != '\n')
bb_error_msg_and_die("invalid ar header");
/* FIXME: more thorough routine would be in order here
* (we have something like that in tar)
* but for now we are lax. */
ar.formatted.magic[0] = '\0'; /* else 4G-2 file will have size="4294967294`\n..." */
typed->size = size = read_num(ar.formatted.size, 10);
/* special filenames have '/' as the first character */