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   1 /*
   2  * join.c
   3  *
   4  * Join split WIMs (sometimes named as .swm files) together into one WIM.
   5  */
   6
   7 /*
   8  * Copyright (C) 2012, 2013 Eric Biggers
   9  *
  10  * This file is part of wimlib, a library for working with WIM files.
  11  *
  12  * wimlib is free software; you can redistribute it and/or modify it under the
  13  * terms of the GNU General Public License as published by the Free
  14  * Software Foundation; either version 3 of the License, or (at your option)
  15  * any later version.
  16  *
  17  * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
  18  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  19  * A PARTICULAR PURPOSE. See the GNU General Public License for more
  20  * details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with wimlib; if not, see http://www.gnu.org/licenses/.
  24  */
  25
  26 #ifdef HAVE_CONFIG_H
  27 #  include "config.h"
  28 #endif
  29
  30 #include "wimlib.h"
  31 #include "wimlib/lookup_table.h"
  32 #include "wimlib/metadata.h"
  33 #include "wimlib/resource.h"
  34 #include "wimlib/swm.h"
  35 #include "wimlib/write.h"
  36 #include "wimlib/xml.h"
  37
  38 #include <stdlib.h> /* for qsort() */
  39
  40 static int
  41 join_wims(WIMStruct **swms, unsigned num_swms,
  42           WIMStruct *joined_wim, int write_flags,
  43           wimlib_progress_func_t progress_func)
  44 {
  45         int ret;
  46         unsigned i;
  47         union wimlib_progress_info progress;
  48         u64 total_bytes = 0;
  49         u64 part_bytes;
  50         u64 swm_part_sizes[num_swms];
  51
  52         /* Calculate total size of the streams in the split WIM parts. */
  53         for (i = 0; i < num_swms; i++) {
  54                 part_bytes = lookup_table_total_stream_size(swms[i]->lookup_table);
  55                 swm_part_sizes[i] = part_bytes;
  56                 total_bytes += part_bytes;
  57         }
  58
  59         if (progress_func) {
  60                 progress.join.total_bytes     = total_bytes;
  61                 progress.join.total_parts     = swms[0]->hdr.total_parts;
  62                 progress.join.completed_bytes = 0;
  63                 progress.join.completed_parts = 0;
  64                 progress_func(WIMLIB_PROGRESS_MSG_JOIN_STREAMS, &progress);
  65         }
  66
  67         /* Write the non-metadata resources from each SWM part */
  68         for (i = 0; i < num_swms; i++) {
  69                 ret = reopen_wim(swms[i]);
  70                 if (ret)
  71                         return ret;
  72                 swms[i]->out_fd = joined_wim->out_fd;
  73                 swms[i]->hdr.part_number = 1;
  74
  75                 ret = for_lookup_table_entry_pos_sorted(swms[i]->lookup_table,
  76                                                         copy_resource,
  77                                                         swms[i]);
  78                 swms[i]->out_fd = -1;
  79                 if (i != 0)
  80                         close_wim(swms[i]);
  81
  82                 if (ret)
  83                         return ret;
  84
  85                 if (progress_func) {
  86                         progress.join.completed_bytes += swm_part_sizes[i];
  87                         progress.join.completed_parts++;
  88                         progress_func(WIMLIB_PROGRESS_MSG_JOIN_STREAMS, &progress);
  89                 }
  90         }
  91
  92         /* Copy the metadata resources from the first SWM part */
  93         joined_wim->hdr.image_count = swms[0]->hdr.image_count;
  94         for (i = 0; i < joined_wim->hdr.image_count; i++) {
  95                 ret = copy_resource(swms[0]->image_metadata[i]->metadata_lte,
  96                                     joined_wim);
  97                 if (ret)
  98                         return ret;
  99         }
 100
 101         /* Preserve some of the header flags */
 102         joined_wim->hdr.flags |= (swms[0]->hdr.flags &
 103                               (WIM_HDR_FLAG_RP_FIX | WIM_HDR_FLAG_READONLY));
 104
 105         /* Write lookup table, XML data, and optional integrity table */
 106         merge_lookup_tables(joined_wim, swms, num_swms);
 107         free_wim_info(joined_wim->wim_info);
 108         joined_wim->wim_info = swms[0]->wim_info;
 109         joined_wim->image_metadata = swms[0]->image_metadata;
 110         ret = finish_write(joined_wim, WIMLIB_ALL_IMAGES, write_flags, progress_func);
 111         joined_wim->wim_info = NULL;
 112         joined_wim->image_metadata = NULL;
 113         return ret;
 114 }
 115
 116 static int
 117 cmp_swms_by_part_number(const void *swm1, const void *swm2)
 118 {
 119         u16 partno_1 = (*(const WIMStruct**)swm1)->hdr.part_number;
 120         u16 partno_2 = (*(const WIMStruct**)swm2)->hdr.part_number;
 121         return (int)partno_1 - (int)partno_2;
 122 }
 123
 124 /*
 125  * Join a set of split WIMs into a stand-alone WIM.
 126  */
 127 WIMLIBAPI int
 128 wimlib_join(const tchar * const *swm_names,
 129             unsigned num_swms,
 130             const tchar *output_path,
 131             int swm_open_flags,
 132             int wim_write_flags,
 133             wimlib_progress_func_t progress_func)
 134 {
 135         int ret;
 136         WIMStruct *joined_wim = NULL;
 137         unsigned i;
 138
 139         swm_open_flags |= WIMLIB_OPEN_FLAG_SPLIT_OK;
 140         wim_write_flags &= WIMLIB_WRITE_MASK_PUBLIC;
 141
 142         if (num_swms < 1 || num_swms > 0xffff)
 143                 return WIMLIB_ERR_INVALID_PARAM;
 144
 145         WIMStruct *swms[num_swms];
 146         ZERO_ARRAY(swms);
 147
 148         for (i = 0; i < num_swms; i++) {
 149                 ret = wimlib_open_wim(swm_names[i], swm_open_flags, &swms[i],
 150                                       progress_func);
 151                 if (ret)
 152                         goto out_free_wims;
 153
 154                 /* Don't open all the parts at the same time, in case there are
 155                  * a lot of them */
 156                 close_wim(swms[i]);
 157         }
 158
 159         qsort(swms, num_swms, sizeof(swms[0]), cmp_swms_by_part_number);
 160
 161         ret = verify_swm_set(swms[0], &swms[1], num_swms - 1);
 162         if (ret)
 163                 goto out_free_wims;
 164
 165         ret = wimlib_create_new_wim(swms[0]->compression_type, &joined_wim);
 166         if (ret)
 167                 goto out_free_wims;
 168
 169         ret = begin_write(joined_wim, output_path, wim_write_flags);
 170         if (ret)
 171                 goto out_free_wims;
 172         ret = join_wims(swms, num_swms, joined_wim, wim_write_flags,
 173                         progress_func);
 174 out_free_wims:
 175         for (i = 0; i < num_swms; i++)
 176                 wimlib_free(swms[i]);
 177         wimlib_free(joined_wim);
 178         return ret;
 179 }