The Tor Browser / file comparison
comparison: ipc/glue/FileDescriptor.cpp
ipc/glue/FileDescriptor.cpp
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:5e455ed6b4fb |
|---|---|
| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 #include "FileDescriptor.h" | |
| 6 | |
| 7 #include "mozilla/Assertions.h" | |
| 8 #include "nsDebug.h" | |
| 9 | |
| 10 #ifdef XP_WIN | |
| 11 | |
| 12 #include <windows.h> | |
| 13 #define INVALID_HANDLE INVALID_HANDLE_VALUE | |
| 14 | |
| 15 #else // XP_WIN | |
| 16 | |
| 17 #include <unistd.h> | |
| 18 | |
| 19 #ifndef OS_POSIX | |
| 20 #define OS_POSIX | |
| 21 #endif | |
| 22 | |
| 23 #include "base/eintr_wrapper.h" | |
| 24 #define INVALID_HANDLE -1 | |
| 25 | |
| 26 #endif // XP_WIN | |
| 27 | |
| 28 using mozilla::ipc::FileDescriptor; | |
| 29 | |
| 30 FileDescriptor::FileDescriptor() | |
| 31 : mHandle(INVALID_HANDLE), mHandleCreatedByOtherProcess(false), | |
| 32 mHandleCreatedByOtherProcessWasUsed(false) | |
| 33 { } | |
| 34 | |
| 35 FileDescriptor::FileDescriptor(PlatformHandleType aHandle) | |
| 36 : mHandle(INVALID_HANDLE), mHandleCreatedByOtherProcess(false), | |
| 37 mHandleCreatedByOtherProcessWasUsed(false) | |
| 38 { | |
| 39 DuplicateInCurrentProcess(aHandle); | |
| 40 } | |
| 41 | |
| 42 void | |
| 43 FileDescriptor::DuplicateInCurrentProcess(PlatformHandleType aHandle) | |
| 44 { | |
| 45 MOZ_ASSERT_IF(mHandleCreatedByOtherProcess, | |
| 46 mHandleCreatedByOtherProcessWasUsed); | |
| 47 | |
| 48 if (IsValid(aHandle)) { | |
| 49 PlatformHandleType newHandle; | |
| 50 #ifdef XP_WIN | |
| 51 if (DuplicateHandle(GetCurrentProcess(), aHandle, GetCurrentProcess(), | |
| 52 &newHandle, 0, FALSE, DUPLICATE_SAME_ACCESS)) { | |
| 53 #else // XP_WIN | |
| 54 if ((newHandle = dup(aHandle)) != INVALID_HANDLE) { | |
| 55 #endif | |
| 56 mHandle = newHandle; | |
| 57 return; | |
| 58 } | |
| 59 NS_WARNING("Failed to duplicate file handle for current process!"); | |
| 60 } | |
| 61 | |
| 62 mHandle = INVALID_HANDLE; | |
| 63 } | |
| 64 | |
| 65 void | |
| 66 FileDescriptor::CloseCurrentProcessHandle() | |
| 67 { | |
| 68 MOZ_ASSERT_IF(mHandleCreatedByOtherProcess, | |
| 69 mHandleCreatedByOtherProcessWasUsed); | |
| 70 | |
| 71 // Don't actually close handles created by another process. | |
| 72 if (mHandleCreatedByOtherProcess) { | |
| 73 return; | |
| 74 } | |
| 75 | |
| 76 if (IsValid()) { | |
| 77 #ifdef XP_WIN | |
| 78 if (!CloseHandle(mHandle)) { | |
| 79 NS_WARNING("Failed to close file handle for current process!"); | |
| 80 } | |
| 81 #else // XP_WIN | |
| 82 HANDLE_EINTR(close(mHandle)); | |
| 83 #endif | |
| 84 mHandle = INVALID_HANDLE; | |
| 85 } | |
| 86 } | |
| 87 | |
| 88 FileDescriptor::PickleType | |
| 89 FileDescriptor::ShareTo(const FileDescriptor::IPDLPrivate&, | |
| 90 FileDescriptor::ProcessHandle aOtherProcess) const | |
| 91 { | |
| 92 PlatformHandleType newHandle; | |
| 93 #ifdef XP_WIN | |
| 94 if (IsValid()) { | |
| 95 if (DuplicateHandle(GetCurrentProcess(), mHandle, aOtherProcess, | |
| 96 &newHandle, 0, FALSE, DUPLICATE_SAME_ACCESS)) { | |
| 97 return newHandle; | |
| 98 } | |
| 99 NS_WARNING("Failed to duplicate file handle for other process!"); | |
| 100 } | |
| 101 return INVALID_HANDLE; | |
| 102 #else // XP_WIN | |
| 103 if (IsValid()) { | |
| 104 newHandle = dup(mHandle); | |
| 105 if (IsValid(newHandle)) { | |
| 106 return base::FileDescriptor(newHandle, /* auto_close */ true); | |
| 107 } | |
| 108 NS_WARNING("Failed to duplicate file handle for other process!"); | |
| 109 } | |
| 110 return base::FileDescriptor(); | |
| 111 #endif | |
| 112 | |
| 113 MOZ_CRASH("Must not get here!"); | |
| 114 } | |
| 115 | |
| 116 // static | |
| 117 bool | |
| 118 FileDescriptor::IsValid(PlatformHandleType aHandle) | |
| 119 { | |
| 120 return aHandle != INVALID_HANDLE; | |
| 121 } |
