widget/gtk/nsCUPSShim.cpp@ac0c01689b40 (annotated)
widget/gtk/nsCUPSShim.cpp
Thu, 15 Jan 2015 15:59:08 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 15:59:08 +0100
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
- permissions
- -rw-r--r--
Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ |
| michael@0 | 2 | /* ex: set tabstop=8 softtabstop=4 shiftwidth=4 expandtab: */ |
| michael@0 | 3 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 6 | |
| michael@0 | 7 | #include "nsDebug.h" |
| michael@0 | 8 | #include "nsString.h" |
| michael@0 | 9 | #include "nsCUPSShim.h" |
| michael@0 | 10 | #include "mozilla/ArrayUtils.h" |
| michael@0 | 11 | #include "prlink.h" |
| michael@0 | 12 | |
| michael@0 | 13 | |
| michael@0 | 14 | // List of symbols to find in libcups. Must match symAddr[] defined in Init(). |
| michael@0 | 15 | // Making this an array of arrays instead of pointers allows storing the |
| michael@0 | 16 | // whole thing in read-only memory. |
| michael@0 | 17 | static const char gSymName[][sizeof("cupsPrintFile")] = { |
| michael@0 | 18 | { "cupsAddOption" }, |
| michael@0 | 19 | { "cupsFreeDests" }, |
| michael@0 | 20 | { "cupsGetDest" }, |
| michael@0 | 21 | { "cupsGetDests" }, |
| michael@0 | 22 | { "cupsPrintFile" }, |
| michael@0 | 23 | { "cupsTempFd" }, |
| michael@0 | 24 | }; |
| michael@0 | 25 | static const int gSymNameCt = mozilla::ArrayLength(gSymName); |
| michael@0 | 26 | |
| michael@0 | 27 | |
| michael@0 | 28 | bool |
| michael@0 | 29 | nsCUPSShim::Init() |
| michael@0 | 30 | { |
| michael@0 | 31 | mCupsLib = PR_LoadLibrary("libcups.so.2"); |
| michael@0 | 32 | if (!mCupsLib) |
| michael@0 | 33 | return false; |
| michael@0 | 34 | |
| michael@0 | 35 | // List of symbol pointers. Must match gSymName[] defined above. |
| michael@0 | 36 | void **symAddr[] = { |
| michael@0 | 37 | (void **)&mCupsAddOption, |
| michael@0 | 38 | (void **)&mCupsFreeDests, |
| michael@0 | 39 | (void **)&mCupsGetDest, |
| michael@0 | 40 | (void **)&mCupsGetDests, |
| michael@0 | 41 | (void **)&mCupsPrintFile, |
| michael@0 | 42 | (void **)&mCupsTempFd, |
| michael@0 | 43 | }; |
| michael@0 | 44 | |
| michael@0 | 45 | for (int i = gSymNameCt; i--; ) { |
| michael@0 | 46 | *(symAddr[i]) = PR_FindSymbol(mCupsLib, gSymName[i]); |
| michael@0 | 47 | if (! *(symAddr[i])) { |
| michael@0 | 48 | #ifdef DEBUG |
| michael@0 | 49 | nsAutoCString msg(gSymName[i]); |
| michael@0 | 50 | msg.Append(" not found in CUPS library"); |
| michael@0 | 51 | NS_WARNING(msg.get()); |
| michael@0 | 52 | #endif |
| michael@0 | 53 | PR_UnloadLibrary(mCupsLib); |
| michael@0 | 54 | mCupsLib = nullptr; |
| michael@0 | 55 | return false; |
| michael@0 | 56 | } |
| michael@0 | 57 | } |
| michael@0 | 58 | return true; |
| michael@0 | 59 | } |
