mirror of
https://github.com/sheumann/hush.git
synced 2024-08-21 11:28:57 +00:00
rpm: code shrink. Now uses open_zipped's logic (factored out into setup_unzip_on_fd())
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:
parent
b8ba6b66f5
commit
27653adc8b
@ -9,8 +9,8 @@
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#include "libbb.h"
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#include "unarchive.h"
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#include "rpm.h"
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#define RPM_HEADER_MAGIC "\216\255\350"
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#define RPM_CHAR_TYPE 1
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#define RPM_INT8_TYPE 2
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#define RPM_INT16_TYPE 3
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@ -46,6 +46,7 @@
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#define TAG_DIRINDEXES 1116
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#define TAG_BASENAMES 1117
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#define TAG_DIRNAMES 1118
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#define RPMFILE_CONFIG (1 << 0)
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#define RPMFILE_DOC (1 << 1)
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@ -147,8 +148,14 @@ int rpm_main(int argc, char **argv)
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time_t bdate_time;
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struct tm *bdate_ptm;
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char bdatestring[50];
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printf("Name : %-29sRelocations: %s\n", rpm_getstr(TAG_NAME, 0), rpm_getstr(TAG_PREFIXS, 0) ? rpm_getstr(TAG_PREFIXS, 0) : "(not relocateable)");
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printf("Version : %-34sVendor: %s\n", rpm_getstr(TAG_VERSION, 0), rpm_getstr(TAG_VENDOR, 0) ? rpm_getstr(TAG_VENDOR, 0) : "(none)");
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const char *p;
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p = rpm_getstr(TAG_PREFIXS, 0);
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if (!p) p = "(not relocateable)";
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printf("Name : %-29sRelocations: %s\n", rpm_getstr(TAG_NAME, 0), p);
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p = rpm_getstr(TAG_VENDOR, 0);
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if (!p) p = "(none)";
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printf("Version : %-34sVendor: %s\n", rpm_getstr(TAG_VERSION, 0), p);
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bdate_time = rpm_getint(TAG_BUILDTIME, 0);
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bdate_ptm = localtime(&bdate_time);
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strftime(bdatestring, 50, "%a %d %b %Y %T %Z", bdate_ptm);
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@ -190,20 +197,15 @@ int rpm_main(int argc, char **argv)
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static void extract_cpio_gz(int fd)
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{
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archive_handle_t *archive_handle;
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unsigned char magic[2];
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#if BB_MMU
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IF_DESKTOP(long long) int FAST_FUNC (*xformer)(int src_fd, int dst_fd);
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enum { xformer_prog = 0 };
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#else
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enum { xformer = 0 };
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const char *xformer_prog;
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#endif
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/* Initialize */
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archive_handle = init_handle();
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archive_handle->seek = seek_by_read;
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//archive_handle->action_header = header_list;
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archive_handle->action_data = data_extract_all;
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#if 0 /* For testing (rpm -i only lists the files in internal cpio): */
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archive_handle->action_header = header_list;
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archive_handle->action_data = data_skip;
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#endif
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archive_handle->ah_flags = ARCHIVE_RESTORE_DATE | ARCHIVE_CREATE_LEADING_DIRS
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/* compat: overwrite existing files.
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* try "rpm -i foo.src.rpm" few times in a row -
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@ -213,46 +215,15 @@ static void extract_cpio_gz(int fd)
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archive_handle->src_fd = fd;
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/*archive_handle->offset = 0; - init_handle() did it */
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// TODO: open_zipped does the same
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xread(archive_handle->src_fd, &magic, 2);
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#if BB_MMU
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xformer = unpack_gz_stream;
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#else
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xformer_prog = "gunzip";
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#endif
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if (magic[0] != 0x1f || magic[1] != 0x8b) {
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if (!ENABLE_FEATURE_SEAMLESS_BZ2
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|| magic[0] != 'B' || magic[1] != 'Z'
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) {
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bb_error_msg_and_die("no gzip"
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IF_FEATURE_SEAMLESS_BZ2("/bzip2")
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" magic");
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}
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#if BB_MMU
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xformer = unpack_bz2_stream;
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#else
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xformer_prog = "bunzip2";
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#endif
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} else {
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#if !BB_MMU
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/* NOMMU version of open_transformer execs an external unzipper that should
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* have the file position at the start of the file */
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xlseek(archive_handle->src_fd, 0, SEEK_SET);
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#endif
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}
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xchdir("/"); /* Install RPM's to root */
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open_transformer(archive_handle->src_fd, xformer, xformer_prog);
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archive_handle->offset = 0;
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setup_unzip_on_fd(archive_handle->src_fd /*, fail_if_not_detected: 1*/);
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while (get_header_cpio(archive_handle) == EXIT_SUCCESS)
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continue;
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}
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static rpm_index **rpm_gettags(int fd, int *num_tags)
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{
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/* We should never need mode than 200, and realloc later */
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/* We should never need more than 200 (shrink via realloc later) */
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rpm_index **tags = xzalloc(200 * sizeof(tags[0]));
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int pass, tagindex = 0;
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@ -260,27 +231,16 @@ static rpm_index **rpm_gettags(int fd, int *num_tags)
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/* 1st pass is the signature headers, 2nd is the main stuff */
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for (pass = 0; pass < 2; pass++) {
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struct {
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char magic[3]; /* 3 byte magic: 0x8e 0xad 0xe8 */
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uint8_t version; /* 1 byte version number */
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uint32_t reserved; /* 4 bytes reserved */
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uint32_t entries; /* Number of entries in header (4 bytes) */
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uint32_t size; /* Size of store (4 bytes) */
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} header;
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struct BUG_header {
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char BUG_header[sizeof(header) == 16 ? 1 : -1];
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};
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struct rpm_header header;
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rpm_index *tmpindex;
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int storepos;
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xread(fd, &header, sizeof(header));
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if (strncmp((char *) &header.magic, RPM_HEADER_MAGIC, 3) != 0)
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return NULL; /* Invalid magic */
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if (header.version != 1)
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return NULL; /* This program only supports v1 headers */
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if (header.magic_and_ver != htonl(RPM_HEADER_MAGICnVER))
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return NULL; /* Invalid magic, or not version 1 */
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header.size = ntohl(header.size);
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header.entries = ntohl(header.entries);
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storepos = xlseek(fd,0,SEEK_CUR) + header.entries * 16;
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storepos = xlseek(fd, 0, SEEK_CUR) + header.entries * 16;
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while (header.entries--) {
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tmpindex = tags[tagindex++] = xmalloc(sizeof(*tmpindex));
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@ -292,14 +252,16 @@ static rpm_index **rpm_gettags(int fd, int *num_tags)
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if (pass == 0)
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tmpindex->tag -= 743;
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}
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xlseek(fd, header.size, SEEK_CUR); /* Seek past store */
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storepos = xlseek(fd, header.size, SEEK_CUR); /* Seek past store */
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/* Skip padding to 8 byte boundary after reading signature headers */
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if (pass == 0)
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xlseek(fd, (8 - (xlseek(fd,0,SEEK_CUR) % 8)) % 8, SEEK_CUR);
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xlseek(fd, (-storepos) & 0x7, SEEK_CUR);
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}
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tags = xrealloc(tags, tagindex * sizeof(tags[0])); /* realloc tags to save space */
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/* realloc tags to save space */
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tags = xrealloc(tags, tagindex * sizeof(tags[0]));
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*num_tags = tagindex;
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return tags; /* All done, leave the file at the start of the gzipped cpio archive */
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/* All done, leave the file at the start of the gzipped cpio archive */
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return tags;
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}
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static int bsearch_rpmtag(const void *key, const void *item)
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@ -324,10 +286,13 @@ static char *rpm_getstr(int tag, int itemindex)
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found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
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if (!found || itemindex >= found[0]->count)
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return NULL;
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if (found[0]->type == RPM_STRING_TYPE || found[0]->type == RPM_I18NSTRING_TYPE || found[0]->type == RPM_STRING_ARRAY_TYPE) {
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if (found[0]->type == RPM_STRING_TYPE
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|| found[0]->type == RPM_I18NSTRING_TYPE
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|| found[0]->type == RPM_STRING_ARRAY_TYPE
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) {
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int n;
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char *tmpstr = (char *) map + found[0]->offset;
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for (n=0; n < itemindex; n++)
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for (n = 0; n < itemindex; n++)
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tmpstr = tmpstr + strlen(tmpstr) + 1;
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return tmpstr;
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}
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38
archival/rpm.h
Normal file
38
archival/rpm.h
Normal file
@ -0,0 +1,38 @@
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/* vi: set sw=4 ts=4: */
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/*
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* RPM structs and consts
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*
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* Copyright (C) 2001 by Laurence Anderson
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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/* RPM file starts with this struct: */
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struct rpm_lead {
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uint32_t magic;
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uint8_t major, minor;
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uint16_t type;
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uint16_t archnum;
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char name[66];
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uint16_t osnum;
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uint16_t signature_type;
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char reserved[16];
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};
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struct BUG_rpm_lead {
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char bug[sizeof(struct rpm_lead) == 96 ? 1 : -1];
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};
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#define RPM_LEAD_MAGIC 0xedabeedb
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#define RPM_LEAD_MAGIC_STR "\355\253\356\333"
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/* Then follows the header: */
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struct rpm_header {
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uint32_t magic_and_ver; /* 3 byte magic: 0x8e 0xad 0xe8; 1 byte version: 0x01 */
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uint32_t reserved; /* 4 bytes reserved */
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uint32_t entries; /* Number of entries in header (4 bytes) */
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uint32_t size; /* Size of store (4 bytes) */
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};
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struct BUG_rpm_header {
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char bug[sizeof(struct rpm_header) == 16 ? 1 : -1];
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};
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#define RPM_HEADER_MAGICnVER 0x8eade801
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#define RPM_HEADER_MAGIC_STR "\216\255\350"
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*/
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#include "libbb.h"
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#include "unarchive.h"
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#define RPM_MAGIC 0xedabeedb
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#define RPM_MAGIC_STR "\355\253\356\333"
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struct rpm_lead {
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uint32_t magic;
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uint8_t major, minor;
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uint16_t type;
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uint16_t archnum;
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char name[66];
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uint16_t osnum;
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uint16_t signature_type;
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char reserved[16];
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};
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#define RPM_HEADER_MAGICnVER 0x8eade801
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#define RPM_HEADER_MAGIC_STR "\216\255\350"
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struct rpm_header {
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uint32_t magic_and_ver; /* 3 byte magic: 0x8e 0xad 0xe8; 1 byte version */
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uint32_t reserved; /* 4 bytes reserved */
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uint32_t entries; /* Number of entries in header (4 bytes) */
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uint32_t size; /* Size of store (4 bytes) */
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};
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#include "rpm.h"
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enum { rpm_fd = STDIN_FILENO };
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@ -65,8 +42,6 @@ int rpm2cpio_main(int argc UNUSED_PARAM, char **argv)
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{
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struct rpm_lead lead;
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unsigned pos;
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unsigned char magic[2];
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IF_DESKTOP(long long) int FAST_FUNC (*unpack)(int src_fd, int dst_fd);
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if (argv[1]) {
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xmove_fd(xopen(argv[1], O_RDONLY), rpm_fd);
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@ -74,17 +49,28 @@ int rpm2cpio_main(int argc UNUSED_PARAM, char **argv)
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xread(rpm_fd, &lead, sizeof(lead));
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/* Just check the magic, the rest is irrelevant */
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if (lead.magic != htonl(RPM_MAGIC)) {
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if (lead.magic != htonl(RPM_LEAD_MAGIC)) {
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bb_error_msg_and_die("invalid RPM magic");
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}
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/* Skip the signature header, align to 8 bytes */
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pos = skip_header();
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seek_by_jump(rpm_fd, (8 - pos) & 7);
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seek_by_jump(rpm_fd, (-(int)pos) & 7);
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/* Skip the main header */
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skip_header();
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#if 0
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/* This works, but doesn't report uncompress errors (they happen in child) */
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setup_unzip_on_fd(rpm_fd /*fail_if_not_detected: 1*/);
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if (bb_copyfd_eof(rpm_fd, STDOUT_FILENO) < 0)
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bb_error_msg_and_die("error unpacking");
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#else
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/* BLOAT */
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{
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unsigned char magic[2];
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IF_DESKTOP(long long) int FAST_FUNC (*unpack)(int src_fd, int dst_fd);
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xread(rpm_fd, &magic, 2);
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unpack = unpack_gz_stream;
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if (magic[0] != 0x1f || magic[1] != 0x8b) {
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@ -98,9 +84,10 @@ int rpm2cpio_main(int argc UNUSED_PARAM, char **argv)
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unpack = unpack_bz2_stream;
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}
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if (unpack(rpm_fd, STDOUT_FILENO) < 0) {
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if (unpack(rpm_fd, STDOUT_FILENO) < 0)
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bb_error_msg_and_die("error unpacking");
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}
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#endif
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if (ENABLE_FEATURE_CLEAN_UP) {
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close(rpm_fd);
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@ -651,6 +651,15 @@ extern char *xmalloc_reads(int fd, char *pfx, size_t *maxsz_p) FAST_FUNC;
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extern void *xmalloc_read(int fd, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
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/* Returns NULL if file can't be opened (default max size: INT_MAX - 4095) */
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extern void *xmalloc_open_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
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/* Autodetects gzip/bzip2 formats. fd may be in the middle of the file! */
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#if ENABLE_FEATURE_SEAMLESS_LZMA \
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|| ENABLE_FEATURE_SEAMLESS_BZ2 \
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|| ENABLE_FEATURE_SEAMLESS_GZ \
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/* || ENABLE_FEATURE_SEAMLESS_Z */
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extern int setup_unzip_on_fd(int fd /*, int fail_if_not_detected*/) FAST_FUNC;
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#else
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# define setup_unzip_on_fd(...) ((void)0)
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#endif
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/* Autodetects .gz etc */
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extern int open_zipped(const char *fname) FAST_FUNC;
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extern void *xmalloc_open_zipped_read_close(const char *fname, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
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97
libbb/read.c
97
libbb/read.c
@ -6,7 +6,6 @@
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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#include "libbb.h"
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#define ZIPPED (ENABLE_FEATURE_SEAMLESS_LZMA \
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@ -16,7 +15,7 @@
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)
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#if ZIPPED
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#include "unarchive.h"
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# include "unarchive.h"
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#endif
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ssize_t FAST_FUNC safe_read(int fd, void *buf, size_t count)
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@ -306,14 +305,11 @@ void* FAST_FUNC xmalloc_xopen_read_close(const char *filename, size_t *maxsz_p)
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return buf;
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}
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int FAST_FUNC open_zipped(const char *fname)
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#if ZIPPED
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int FAST_FUNC setup_unzip_on_fd(int fd /*, int fail_if_not_detected*/)
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{
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#if !ZIPPED
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return open(fname, O_RDONLY);
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#else
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const int fail_if_not_detected = 1;
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unsigned char magic[2];
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char *sfx;
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int fd;
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#if BB_MMU
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IF_DESKTOP(long long) int FAST_FUNC (*xformer)(int src_fd, int dst_fd);
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enum { xformer_prog = 0 };
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@ -322,6 +318,56 @@ int FAST_FUNC open_zipped(const char *fname)
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const char *xformer_prog;
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#endif
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/* .gz and .bz2 both have 2-byte signature, and their
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* unpack_XXX_stream wants this header skipped. */
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xread(fd, &magic, 2);
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#if ENABLE_FEATURE_SEAMLESS_GZ
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# if BB_MMU
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xformer = unpack_gz_stream;
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# else
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xformer_prog = "gunzip";
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# endif
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#endif
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if (!ENABLE_FEATURE_SEAMLESS_GZ
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|| magic[0] != 0x1f || magic[1] != 0x8b
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) {
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if (!ENABLE_FEATURE_SEAMLESS_BZ2
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|| magic[0] != 'B' || magic[1] != 'Z'
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) {
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if (fail_if_not_detected)
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bb_error_msg_and_die("no gzip"
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IF_FEATURE_SEAMLESS_BZ2("/bzip2")
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" magic");
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xlseek(fd, -2, SEEK_CUR);
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return fd;
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}
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#if BB_MMU
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xformer = unpack_bz2_stream;
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#else
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xformer_prog = "bunzip2";
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#endif
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} else {
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#if !BB_MMU
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/* NOMMU version of open_transformer execs
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* an external unzipper that wants
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* file position at the start of the file */
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xlseek(fd, -2, SEEK_CUR);
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#endif
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}
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open_transformer(fd, xformer, xformer_prog);
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return fd;
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}
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#endif /* ZIPPED */
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int FAST_FUNC open_zipped(const char *fname)
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{
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#if !ZIPPED
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return open(fname, O_RDONLY);
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#else
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char *sfx;
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int fd;
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fd = open(fname, O_RDONLY);
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if (fd < 0)
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return fd;
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@ -335,40 +381,7 @@ int FAST_FUNC open_zipped(const char *fname)
|
||||
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);
|
||||
#if ENABLE_FEATURE_SEAMLESS_GZ
|
||||
#if BB_MMU
|
||||
xformer = unpack_gz_stream;
|
||||
#else
|
||||
xformer_prog = "gunzip";
|
||||
#endif
|
||||
#endif
|
||||
if (!ENABLE_FEATURE_SEAMLESS_GZ
|
||||
|| 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 wants
|
||||
* file position at the start of the file */
|
||||
xlseek(fd, 0, SEEK_SET);
|
||||
#endif
|
||||
}
|
||||
open_transformer(fd, xformer, xformer_prog);
|
||||
setup_unzip_on_fd(fd /*, fail_if_not_detected: 1*/);
|
||||
}
|
||||
}
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user