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rpm: code shrink. Now uses open_zipped's logic (factored out into setup_unzip_on_fd())

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function                                             old     new   delta
setup_unzip_on_fd                                      -      80     +80
open_zipped                                          176     113     -63
rpm_main                                            1672    1355    -317
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/2 up/down: 80/-380)          Total: -300 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2010-05-06 14:19:19 +00:00
parent b8ba6b66f5
commit 27653adc8b
5 changed files with 162 additions and 150 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

93
archival/rpm.c
View File

@ -9,8 +9,8 @@
#include "libbb.h"
#include "unarchive.h"
#include "rpm.h"
#define RPM_HEADER_MAGIC "\216\255\350"
#define RPM_CHAR_TYPE 1
#define RPM_INT8_TYPE 2
#define RPM_INT16_TYPE 3
@ -46,6 +46,7 @@
#define TAG_DIRINDEXES 1116
#define TAG_BASENAMES 1117
#define TAG_DIRNAMES 1118
#define RPMFILE_CONFIG (1 << 0)
#define RPMFILE_DOC (1 << 1)
@ -147,8 +148,14 @@ int rpm_main(int argc, char **argv)
time_t bdate_time;
struct tm *bdate_ptm;
char bdatestring[50];
printf("Name : %-29sRelocations: %s\n", rpm_getstr(TAG_NAME, 0), rpm_getstr(TAG_PREFIXS, 0) ? rpm_getstr(TAG_PREFIXS, 0) : "(not relocateable)");
printf("Version : %-34sVendor: %s\n", rpm_getstr(TAG_VERSION, 0), rpm_getstr(TAG_VENDOR, 0) ? rpm_getstr(TAG_VENDOR, 0) : "(none)");
const char *p;
p = rpm_getstr(TAG_PREFIXS, 0);
if (!p) p = "(not relocateable)";
printf("Name : %-29sRelocations: %s\n", rpm_getstr(TAG_NAME, 0), p);
p = rpm_getstr(TAG_VENDOR, 0);
if (!p) p = "(none)";
printf("Version : %-34sVendor: %s\n", rpm_getstr(TAG_VERSION, 0), p);
bdate_time = rpm_getint(TAG_BUILDTIME, 0);
bdate_ptm = localtime(&bdate_time);
strftime(bdatestring, 50, "%a %d %b %Y %T %Z", bdate_ptm);
@ -190,20 +197,15 @@ int rpm_main(int argc, char **argv)
static void extract_cpio_gz(int fd)
{
archive_handle_t *archive_handle;
unsigned char magic[2];
#if BB_MMU
IF_DESKTOP(long long) int FAST_FUNC (*xformer)(int src_fd, int dst_fd);
enum { xformer_prog = 0 };
#else
enum { xformer = 0 };
const char *xformer_prog;
#endif
/* Initialize */
archive_handle = init_handle();
archive_handle->seek = seek_by_read;
//archive_handle->action_header = header_list;
archive_handle->action_data = data_extract_all;
#if 0 /* For testing (rpm -i only lists the files in internal cpio): */
archive_handle->action_header = header_list;
archive_handle->action_data = data_skip;
#endif
archive_handle->ah_flags = ARCHIVE_RESTORE_DATE | ARCHIVE_CREATE_LEADING_DIRS
/* compat: overwrite existing files.
* try "rpm -i foo.src.rpm" few times in a row -
@ -213,46 +215,15 @@ static void extract_cpio_gz(int fd)
archive_handle->src_fd = fd;
/*archive_handle->offset = 0; - init_handle() did it */
// TODO: open_zipped does the same
xread(archive_handle->src_fd, &magic, 2);
#if BB_MMU
xformer = unpack_gz_stream;
#else
xformer_prog = "gunzip";
#endif
if (magic[0] != 0x1f || magic[1] != 0x8b) {
if (!ENABLE_FEATURE_SEAMLESS_BZ2
|| magic[0] != 'B' || magic[1] != 'Z'
) {
bb_error_msg_and_die("no gzip"
IF_FEATURE_SEAMLESS_BZ2("/bzip2")
" magic");
}
#if BB_MMU
xformer = unpack_bz2_stream;
#else
xformer_prog = "bunzip2";
#endif
} else {
#if !BB_MMU
/* NOMMU version of open_transformer execs an external unzipper that should
* have the file position at the start of the file */
xlseek(archive_handle->src_fd, 0, SEEK_SET);
#endif
}
xchdir("/"); /* Install RPM's to root */
open_transformer(archive_handle->src_fd, xformer, xformer_prog);
archive_handle->offset = 0;
setup_unzip_on_fd(archive_handle->src_fd /*, fail_if_not_detected: 1*/);
while (get_header_cpio(archive_handle) == EXIT_SUCCESS)
continue;
}
static rpm_index **rpm_gettags(int fd, int *num_tags)
{
/* We should never need mode than 200, and realloc later */
/* We should never need more than 200 (shrink via realloc later) */
rpm_index **tags = xzalloc(200 * sizeof(tags[0]));
int pass, tagindex = 0;
@ -260,24 +231,13 @@ static rpm_index **rpm_gettags(int fd, int *num_tags)
/* 1st pass is the signature headers, 2nd is the main stuff */
for (pass = 0; pass < 2; pass++) {
struct {
char magic[3]; /* 3 byte magic: 0x8e 0xad 0xe8 */
uint8_t version; /* 1 byte version number */
uint32_t reserved; /* 4 bytes reserved */
uint32_t entries; /* Number of entries in header (4 bytes) */
uint32_t size; /* Size of store (4 bytes) */
} header;
struct BUG_header {
char BUG_header[sizeof(header) == 16 ? 1 : -1];
};
struct rpm_header header;
rpm_index *tmpindex;
int storepos;
xread(fd, &header, sizeof(header));
if (strncmp((char *) &header.magic, RPM_HEADER_MAGIC, 3) != 0)
return NULL; /* Invalid magic */
if (header.version != 1)
return NULL; /* This program only supports v1 headers */
if (header.magic_and_ver != htonl(RPM_HEADER_MAGICnVER))
return NULL; /* Invalid magic, or not version 1 */
header.size = ntohl(header.size);
header.entries = ntohl(header.entries);
storepos = xlseek(fd, 0, SEEK_CUR) + header.entries * 16;
@ -292,14 +252,16 @@ static rpm_index **rpm_gettags(int fd, int *num_tags)
if (pass == 0)
tmpindex->tag -= 743;
}
xlseek(fd, header.size, SEEK_CUR); /* Seek past store */
storepos = xlseek(fd, header.size, SEEK_CUR); /* Seek past store */
/* Skip padding to 8 byte boundary after reading signature headers */
if (pass == 0)
xlseek(fd, (8 - (xlseek(fd,0,SEEK_CUR) % 8)) % 8, SEEK_CUR);
xlseek(fd, (-storepos) & 0x7, SEEK_CUR);
}
tags = xrealloc(tags, tagindex * sizeof(tags[0])); /* realloc tags to save space */
/* realloc tags to save space */
tags = xrealloc(tags, tagindex * sizeof(tags[0]));
*num_tags = tagindex;
return tags; /* All done, leave the file at the start of the gzipped cpio archive */
/* All done, leave the file at the start of the gzipped cpio archive */
return tags;
}
static int bsearch_rpmtag(const void *key, const void *item)
@ -324,7 +286,10 @@ static char *rpm_getstr(int tag, int itemindex)
found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
if (!found || itemindex >= found[0]->count)
return NULL;
if (found[0]->type == RPM_STRING_TYPE || found[0]->type == RPM_I18NSTRING_TYPE || found[0]->type == RPM_STRING_ARRAY_TYPE) {
if (found[0]->type == RPM_STRING_TYPE
|| found[0]->type == RPM_I18NSTRING_TYPE
|| found[0]->type == RPM_STRING_ARRAY_TYPE
) {
int n;
char *tmpstr = (char *) map + found[0]->offset;
for (n = 0; n < itemindex; n++)

38
archival/rpm.h Normal file
View File

@ -0,0 +1,38 @@
/* vi: set sw=4 ts=4: */
/*
* RPM structs and consts
*
* Copyright (C) 2001 by Laurence Anderson
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
/* RPM file starts with this struct: */
struct rpm_lead {
uint32_t magic;
uint8_t major, minor;
uint16_t type;
uint16_t archnum;
char name[66];
uint16_t osnum;
uint16_t signature_type;
char reserved[16];
};
struct BUG_rpm_lead {
char bug[sizeof(struct rpm_lead) == 96 ? 1 : -1];
};
#define RPM_LEAD_MAGIC 0xedabeedb
#define RPM_LEAD_MAGIC_STR "\355\253\356\333"
/* Then follows the header: */
struct rpm_header {
uint32_t magic_and_ver; /* 3 byte magic: 0x8e 0xad 0xe8; 1 byte version: 0x01 */
uint32_t reserved; /* 4 bytes reserved */
uint32_t entries; /* Number of entries in header (4 bytes) */
uint32_t size; /* Size of store (4 bytes) */
};
struct BUG_rpm_header {
char bug[sizeof(struct rpm_header) == 16 ? 1 : -1];
};
#define RPM_HEADER_MAGICnVER 0x8eade801
#define RPM_HEADER_MAGIC_STR "\216\255\350"

45
archival/rpm2cpio.c
View File

@ -8,30 +8,7 @@
*/
#include "libbb.h"
#include "unarchive.h"
#define RPM_MAGIC 0xedabeedb
#define RPM_MAGIC_STR "\355\253\356\333"
struct rpm_lead {
uint32_t magic;
uint8_t major, minor;
uint16_t type;
uint16_t archnum;
char name[66];
uint16_t osnum;
uint16_t signature_type;
char reserved[16];
};
#define RPM_HEADER_MAGICnVER 0x8eade801
#define RPM_HEADER_MAGIC_STR "\216\255\350"
struct rpm_header {
uint32_t magic_and_ver; /* 3 byte magic: 0x8e 0xad 0xe8; 1 byte version */
uint32_t reserved; /* 4 bytes reserved */
uint32_t entries; /* Number of entries in header (4 bytes) */
uint32_t size; /* Size of store (4 bytes) */
};
#include "rpm.h"
enum { rpm_fd = STDIN_FILENO };
@ -65,8 +42,6 @@ int rpm2cpio_main(int argc UNUSED_PARAM, char **argv)
{
struct rpm_lead lead;
unsigned pos;
unsigned char magic[2];
IF_DESKTOP(long long) int FAST_FUNC (*unpack)(int src_fd, int dst_fd);
if (argv[1]) {
xmove_fd(xopen(argv[1], O_RDONLY), rpm_fd);
@ -74,17 +49,28 @@ int rpm2cpio_main(int argc UNUSED_PARAM, char **argv)
xread(rpm_fd, &lead, sizeof(lead));
/* Just check the magic, the rest is irrelevant */
if (lead.magic != htonl(RPM_MAGIC)) {
if (lead.magic != htonl(RPM_LEAD_MAGIC)) {
bb_error_msg_and_die("invalid RPM magic");
}
/* Skip the signature header, align to 8 bytes */
pos = skip_header();
seek_by_jump(rpm_fd, (8 - pos) & 7);
seek_by_jump(rpm_fd, (-(int)pos) & 7);
/* Skip the main header */
skip_header();
#if 0
/* This works, but doesn't report uncompress errors (they happen in child) */
setup_unzip_on_fd(rpm_fd /*fail_if_not_detected: 1*/);
if (bb_copyfd_eof(rpm_fd, STDOUT_FILENO) < 0)
bb_error_msg_and_die("error unpacking");
#else
/* BLOAT */
{
unsigned char magic[2];
IF_DESKTOP(long long) int FAST_FUNC (*unpack)(int src_fd, int dst_fd);
xread(rpm_fd, &magic, 2);
unpack = unpack_gz_stream;
if (magic[0] != 0x1f || magic[1] != 0x8b) {
@ -98,9 +84,10 @@ int rpm2cpio_main(int argc UNUSED_PARAM, char **argv)
unpack = unpack_bz2_stream;
}
if (unpack(rpm_fd, STDOUT_FILENO) < 0) {
if (unpack(rpm_fd, STDOUT_FILENO) < 0)
bb_error_msg_and_die("error unpacking");
}
#endif
if (ENABLE_FEATURE_CLEAN_UP) {
close(rpm_fd);

9
include/libbb.h
View File

@ -651,6 +651,15 @@ extern char *xmalloc_reads(int fd, char *pfx, size_t *maxsz_p) FAST_FUNC;
extern void *xmalloc_read(int fd, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
/* Returns NULL if file can't be opened (default max size: INT_MAX - 4095) */
extern void *xmalloc_open_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
/* Autodetects gzip/bzip2 formats. fd may be in the middle of the file! */
#if ENABLE_FEATURE_SEAMLESS_LZMA \
|| ENABLE_FEATURE_SEAMLESS_BZ2 \
|| ENABLE_FEATURE_SEAMLESS_GZ \
/* || ENABLE_FEATURE_SEAMLESS_Z */
extern int setup_unzip_on_fd(int fd /*, int fail_if_not_detected*/) FAST_FUNC;
#else
# define setup_unzip_on_fd(...) ((void)0)
#endif
/* Autodetects .gz etc */
extern int open_zipped(const char *fname) FAST_FUNC;
extern void *xmalloc_open_zipped_read_close(const char *fname, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;

55
libbb/read.c
View File

@ -6,7 +6,6 @@
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include "libbb.h"
#define ZIPPED (ENABLE_FEATURE_SEAMLESS_LZMA \
@ -306,14 +305,11 @@ void* FAST_FUNC xmalloc_xopen_read_close(const char *filename, size_t *maxsz_p)
return buf;
}
int FAST_FUNC open_zipped(const char *fname)
#if ZIPPED
int FAST_FUNC setup_unzip_on_fd(int fd /*, int fail_if_not_detected*/)
{
#if !ZIPPED
return open(fname, O_RDONLY);
#else
const int fail_if_not_detected = 1;
unsigned char magic[2];
char *sfx;
int fd;
#if BB_MMU
IF_DESKTOP(long long) int FAST_FUNC (*xformer)(int src_fd, int dst_fd);
enum { xformer_prog = 0 };
@ -322,19 +318,6 @@ int FAST_FUNC open_zipped(const char *fname)
const char *xformer_prog;
#endif
fd = open(fname, O_RDONLY);
if (fd < 0)
return fd;
sfx = strrchr(fname, '.');
if (sfx) {
if (ENABLE_FEATURE_SEAMLESS_LZMA && strcmp(sfx, ".lzma") == 0)
/* .lzma has no header/signature, just trust it */
open_transformer(fd, unpack_lzma_stream, "unlzma");
else
if ((ENABLE_FEATURE_SEAMLESS_GZ && strcmp(sfx, ".gz") == 0)
|| (ENABLE_FEATURE_SEAMLESS_BZ2 && strcmp(sfx, ".bz2") == 0)
) {
/* .gz and .bz2 both have 2-byte signature, and their
* unpack_XXX_stream wants this header skipped. */
xread(fd, &magic, 2);
@ -351,9 +334,12 @@ int FAST_FUNC open_zipped(const char *fname)
if (!ENABLE_FEATURE_SEAMLESS_BZ2
|| magic[0] != 'B' || magic[1] != 'Z'
) {
if (fail_if_not_detected)
bb_error_msg_and_die("no gzip"
IF_FEATURE_SEAMLESS_BZ2("/bzip2")
" magic");
xlseek(fd, -2, SEEK_CUR);
return fd;
}
#if BB_MMU
xformer = unpack_bz2_stream;
@ -365,10 +351,37 @@ int FAST_FUNC open_zipped(const char *fname)
/* NOMMU version of open_transformer execs
* an external unzipper that wants
* file position at the start of the file */
xlseek(fd, 0, SEEK_SET);
xlseek(fd, -2, SEEK_CUR);
#endif
}
open_transformer(fd, xformer, xformer_prog);
return fd;
}
#endif /* ZIPPED */
int FAST_FUNC open_zipped(const char *fname)
{
#if !ZIPPED
return open(fname, O_RDONLY);
#else
char *sfx;
int fd;
fd = open(fname, O_RDONLY);
if (fd < 0)
return fd;
sfx = strrchr(fname, '.');
if (sfx) {
if (ENABLE_FEATURE_SEAMLESS_LZMA && strcmp(sfx, ".lzma") == 0)
/* .lzma has no header/signature, just trust it */
open_transformer(fd, unpack_lzma_stream, "unlzma");
else
if ((ENABLE_FEATURE_SEAMLESS_GZ && strcmp(sfx, ".gz") == 0)
|| (ENABLE_FEATURE_SEAMLESS_BZ2 && strcmp(sfx, ".bz2") == 0)
) {
setup_unzip_on_fd(fd /*, fail_if_not_detected: 1*/);
}
}