gnu/packages/patches/ghostscript-no-header-id.patch

   1 This patch makes the "/ID" field optional.
   2
   3 If the environment variable GS_GENERATE_UUIDS is set to "0" or "no", it will
   4 not write out the "/ID" field (if that's permissible).
   5
   6 Upstream does not want to do this.
   7
   8 See: https://bugs.ghostscript.com/show_bug.cgi?id=698208
   9 diff -ur orig/gnu-ghostscript-9.14.0/devices/vector/gdevpdf.c gnu-ghostscript-9.14.0/devices/vector/gdevpdf.c
  10 --- orig/gnu-ghostscript-9.14.0/devices/vector/gdevpdf.c        2017-07-09 23:30:28.960479189 +0200
  11 +++ gnu-ghostscript-9.14.0/devices/vector/gdevpdf.c     2017-07-09 23:34:34.306524488 +0200
  12 @@ -1785,8 +1785,11 @@
  13       * +1 for the linearisation dict and +1 for the primary hint stream.
  14       */
  15      linear_params->FirsttrailerOffset = gp_ftell_64(linear_params->Lin_File.file);
  16 -    gs_sprintf(LDict, "\ntrailer\n<</Size %ld/Info %d 0 R/Root %d 0 R/ID[%s%s]/Prev %d>>\nstartxref\r\n0\n%%%%EOF\n        \n",
  17 -        linear_params->LastResource + 3, pdev->ResourceUsage[linear_params->Info_id].NewObjectNumber, pdev->ResourceUsage[linear_params->Catalog_id].NewObjectNumber, fileID, fileID, 0);
  18 +    gs_sprintf(LDict, "\ntrailer\n<</Size %ld/Info %d 0 R/Root %d 0 R",
  19 +        linear_params->LastResource + 3, pdev->ResourceUsage[linear_params->Info_id].NewObjectNumber, pdev->ResourceUsage[linear_params->Catalog_id].NewObjectNumber);
  20 +    if (pdev->OwnerPassword.size > 0 || !(!getenv("GS_GENERATE_UUIDS") || (strcasecmp(getenv("GS_GENERATE_UUIDS"), "0") != 0 && strcasecmp(getenv("GS_GENERATE_UUIDS"), "no") != 0))) /* ID is mandatory when encrypting */
  21 +        gs_sprintf(LDict, "/ID[%s%s]", fileID, fileID);
  22 +    gs_sprintf(LDict, "/Prev %d>>\nstartxref\r\n0\n%%%%EOF\n        \n", 0);
  23      fwrite(LDict, strlen(LDict), 1, linear_params->Lin_File.file);
  24
  25      /* Write document catalog (Part 4) */
  26 @@ -2321,8 +2324,11 @@
  27      if (code != 0)
  28          return_error(gs_error_ioerror);
  29
  30 -    gs_sprintf(LDict, "\ntrailer\n<</Size %ld/Info %d 0 R/Root %d 0 R/ID[%s%s]/Prev %"PRId64">>\nstartxref\r\n0\n%%%%EOF\n",
  31 -        linear_params->LastResource + 3, pdev->ResourceUsage[linear_params->Info_id].NewObjectNumber, pdev->ResourceUsage[linear_params->Catalog_id].NewObjectNumber, fileID, fileID, mainxref);
  32 +    gs_sprintf(LDict, "\ntrailer\n<</Size %ld/Info %d 0 R/Root %d 0 R",
  33 +        linear_params->LastResource + 3, pdev->ResourceUsage[linear_params->Info_id].NewObjectNumber, pdev->ResourceUsage[linear_params->Catalog_id].NewObjectNumber);
  34 +    if (pdev->OwnerPassword.size > 0 || !(!getenv("GS_GENERATE_UUIDS") || (strcasecmp(getenv("GS_GENERATE_UUIDS"), "0") != 0 || strcasecmp(getenv("GS_GENERATE_UUIDS"), "no") != 0))) /* ID is mandatory when encrypting */
  35 +        gs_sprintf(LDict, "/ID[%s%s]", fileID, fileID);
  36 +    gs_sprintf(LDict, "/Prev %"PRId64">>\nstartxref\r\n0\n%%%%EOF\n", mainxref);
  37      fwrite(LDict, strlen(LDict), 1, linear_params->sfile);
  38
  39      code = gp_fseek_64(linear_params->sfile, pdev->ResourceUsage[HintStreamObj].LinearisedOffset, SEEK_SET);
  40 @@ -3016,10 +3022,12 @@
  41              stream_puts(s, "trailer\n");
  42              pprintld3(s, "<< /Size %ld /Root %ld 0 R /Info %ld 0 R\n",
  43                    pdev->next_id, Catalog_id, Info_id);
  44 -            stream_puts(s, "/ID [");
  45 -            psdf_write_string(pdev->strm, pdev->fileID, sizeof(pdev->fileID), 0);
  46 -            psdf_write_string(pdev->strm, pdev->fileID, sizeof(pdev->fileID), 0);
  47 -            stream_puts(s, "]\n");
  48 +            if (pdev->OwnerPassword.size > 0 || !(!getenv("GS_GENERATE_UUIDS") || (strcasecmp(getenv("GS_GENERATE_UUIDS"), "0") != 0 || strcasecmp(getenv("GS_GENERATE_UUIDS"), "no") != 0))) { /* ID is mandatory when encrypting */
  49 +                stream_puts(s, "/ID [");
  50 +                psdf_write_string(pdev->strm, pdev->fileID, sizeof(pdev->fileID), 0);
  51 +                psdf_write_string(pdev->strm, pdev->fileID, sizeof(pdev->fileID), 0);
  52 +                stream_puts(s, "]\n");
  53 +            }
  54              if (pdev->OwnerPassword.size > 0) {
  55                  pprintld1(s, "/Encrypt %ld 0 R ", Encrypt_id);
  56              }