5 files changed, 85 insertions, 7 deletions

diff --git a/archival/dpkg.c b/archival/dpkg.c
index 6cab77f38..df894472c 100644
--- a/archival/dpkg.c
+++ b/archival/dpkg.c
@@ -38,6 +38,7 @@
  *
  */
 
+#include <fcntl.h>
 #include <getopt.h>
 #include <stdlib.h>
 #include <string.h>
@@ -1310,14 +1311,44 @@ void purge_package(const unsigned int package_num)
         set_status(status_num, "not-installed", 3);
 }
 
+static archive_handle_t *deb_extract(const char *filename, const char *ar_name,
+        const char *tar_gz_name, char *prefix, void (*deb_action_data)(struct archive_handle_s *))
+{
+        archive_handle_t *ar_archive;
+        archive_handle_t *tar_gz_archive;
+
+        /* Setup the tar archive handle */
+        tar_gz_archive = init_handle();
+        tar_gz_archive->filter = filter_accept_reject_list;
+        tar_gz_archive->action_data = deb_action_data;
+        tar_gz_archive->buffer = prefix;
+        if (tar_gz_name) {
+                tar_gz_archive->accept = add_to_list(NULL, tar_gz_name);
+        }
+
+        /* Setup an ar archive handle that refers to the gzip sub archive */    
+        ar_archive = init_handle();
+        ar_archive->action_data_subarchive = get_header_tar_gz;
+        ar_archive->sub_archive = tar_gz_archive;
+        ar_archive->filter = filter_accept_reject_list;
+        ar_archive->accept = add_to_list(NULL, ar_name);
+
+        tar_gz_archive->src_fd = ar_archive->src_fd = xopen(filename, O_RDONLY);
+
+        unpack_ar_archive(ar_archive);
+        close(ar_archive->src_fd);
+
+        return(ar_archive->sub_archive);
+}
+
 void unpack_package(deb_file_t *deb_file)
 {
         const char *package_name = name_hashtable[package_hashtable[deb_file->package]->name];
         const unsigned int status_num = search_status_hashtable(package_name);
         const unsigned int status_package_num = status_hashtable[status_num]->package;
-
-        FILE *out_stream;
         char *info_prefix;
+        archive_handle_t *archive_handle;
+        FILE *out_stream;
 
         /* If existing version, remove it first */
         if (strcmp(name_hashtable[get_status(status_num, 3)], "installed") == 0) {
@@ -1333,8 +1364,8 @@ void unpack_package(deb_file_t *deb_file)
         /* Extract control.tar.gz to /var/lib/dpkg/info/<package>.filename */
         info_prefix = (char *) xmalloc(strlen(package_name) + 20 + 4 + 2);
         sprintf(info_prefix, "/var/lib/dpkg/info/%s.", package_name);
-        deb_extract(deb_file->filename, stdout, (extract_quiet | extract_control_tar_gz | extract_all_to_fs | extract_unconditional), info_prefix, NULL);
 
+        deb_extract(deb_file->filename, "control.tar.gz", NULL, info_prefix, data_extract_all_prefix);
         /* Run the preinst prior to extracting */
         if (run_package_script(package_name, "preinst") != 0) {
                 /* when preinst returns exit code != 0 then quit installation process */
@@ -1342,12 +1373,17 @@ void unpack_package(deb_file_t *deb_file)
         }       
 
         /* Extract data.tar.gz to the root directory */
-        deb_extract(deb_file->filename, stdout, (extract_quiet | extract_data_tar_gz | extract_all_to_fs | extract_unconditional), "/", NULL);
+        archive_handle = deb_extract(deb_file->filename, "data.tar.gz", NULL, NULL, data_extract_all);
 
         /* Create the list file */
         strcat(info_prefix, "list");
         out_stream = xfopen(info_prefix, "w");                  
-        deb_extract(deb_file->filename, out_stream, (extract_quiet | extract_data_tar_gz | extract_list), "/", NULL);
+        while (archive_handle->passed) {
+                /* blindly skip over the leading '.' */
+                fputs(archive_handle->passed->data + 1, out_stream);
+                fputc('\n', out_stream);
+                archive_handle->passed = archive_handle->passed->link;
+        }
         fclose(out_stream);
 
         /* change status */
@@ -1440,8 +1476,10 @@ int dpkg_main(int argc, char **argv)
                 deb_file = xrealloc(deb_file, sizeof(deb_file_t *) * (deb_count + 2));
                 deb_file[deb_count] = (deb_file_t *) xmalloc(sizeof(deb_file_t));
                 if (dpkg_opt & dpkg_opt_filename) {
+                        archive_handle_t *archive_handle;
                         deb_file[deb_count]->filename = xstrdup(argv[optind]);
-                        deb_file[deb_count]->control_file = deb_extract(argv[optind], stdout, (extract_control_tar_gz | extract_one_to_buffer), NULL, "./control");
+                        archive_handle = deb_extract(argv[optind], "control.tar.gz", "./control", NULL, data_extract_to_buffer);
+                        deb_file[deb_count]->control_file = archive_handle->buffer;
                         if (deb_file[deb_count]->control_file == NULL) {
                                 error_msg_and_die("Couldnt extract control file");
                         }
diff --git a/archival/libunarchive/Makefile.in b/archival/libunarchive/Makefile.in
index e559cb40e..87c888b0b 100644
--- a/archival/libunarchive/Makefile.in
+++ b/archival/libunarchive/Makefile.in
@@ -26,7 +26,9 @@ LIBUNARCHIVE-y:= \
 \
         data_skip.o \
         data_extract_all.o \
+        data_extract_all_prefix.o \
         data_extract_to_stdout.o \
+        data_extract_to_buffer.o \
 \
         filter_accept_all.o \
         filter_accept_list.o \
diff --git a/archival/libunarchive/data_extract_all_prefix.c b/archival/libunarchive/data_extract_all_prefix.c
new file mode 100644
index 000000000..e4e93fc74
--- /dev/null
+++ b/archival/libunarchive/data_extract_all_prefix.c
@@ -0,0 +1,23 @@
+#include <sys/types.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <utime.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include "libbb.h"
+#include "unarchive.h"
+
+extern void data_extract_all_prefix(archive_handle_t *archive_handle)
+{
+        char *name_ptr = archive_handle->file_header->name;
+
+        name_ptr += strspn(name_ptr, "./");
+        if (name_ptr[0] != '\0') {
+                archive_handle->file_header->name = xmalloc(strlen(archive_handle->buffer) + 2 + strlen(name_ptr));
+                sprintf(archive_handle->file_header->name, "%s%s", archive_handle->buffer, name_ptr);
+                data_extract_all(archive_handle);
+        }
+        return;
+}
diff --git a/archival/libunarchive/data_extract_to_buffer.c b/archival/libunarchive/data_extract_to_buffer.c
new file mode 100644
index 000000000..02ee4b362
--- /dev/null
+++ b/archival/libunarchive/data_extract_to_buffer.c
@@ -0,0 +1,11 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include "unarchive.h"
+#include "libbb.h"
+
+extern void data_extract_to_buffer(archive_handle_t *archive_handle)
+{
+        archive_handle->buffer = xmalloc(archive_handle->file_header->size + 1);
+        
+        xread_all(archive_handle->src_fd, archive_handle->buffer, archive_handle->file_header->size);
+}
diff --git a/include/unarchive.h b/include/unarchive.h
index 956c74fb8..d9cf3c05c 100644
--- a/include/unarchive.h
+++ b/include/unarchive.h
@@ -57,6 +57,9 @@ typedef struct archive_handle_s {
         /* Count the number of bytes processed */
         off_t offset;
 
+        /* Temperary storage */
+        char *buffer;
+
         /* Misc. stuff */
         unsigned char flags;
 
@@ -70,10 +73,11 @@ extern char filter_accept_reject_list(const llist_t *accept_list, const llist_t
 
 extern void unpack_ar_archive(archive_handle_t *ar_archive);
 
-extern void data_gunzip(archive_handle_t *archive_handle);
 extern void data_skip(archive_handle_t *archive_handle);
 extern void data_extract_all(archive_handle_t *archive_handle);
+extern void data_extract_all_prefix(archive_handle_t *archive_handle);
 extern void data_extract_to_stdout(archive_handle_t *archive_handle);
+extern void data_extract_to_buffer(archive_handle_t *archive_handle);
 
 extern void header_skip(const file_header_t *file_header);
 extern void header_list(const file_header_t *file_header);