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1 // Copyright 2014 The Crashpad Authors. All rights reserved. | 1 // Copyright 2014 The Crashpad Authors. All rights reserved. |
2 // | 2 // |
3 // Licensed under the Apache License, Version 2.0 (the "License"); | 3 // Licensed under the Apache License, Version 2.0 (the "License"); |
4 // you may not use this file except in compliance with the License. | 4 // you may not use this file except in compliance with the License. |
5 // You may obtain a copy of the License at | 5 // You may obtain a copy of the License at |
6 // | 6 // |
7 // http://www.apache.org/licenses/LICENSE-2.0 | 7 // http://www.apache.org/licenses/LICENSE-2.0 |
8 // | 8 // |
9 // Unless required by applicable law or agreed to in writing, software | 9 // Unless required by applicable law or agreed to in writing, software |
10 // distributed under the License is distributed on an "AS IS" BASIS, | 10 // distributed under the License is distributed on an "AS IS" BASIS, |
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
12 // See the License for the specific language governing permissions and | 12 // See the License for the specific language governing permissions and |
13 // limitations under the License. | 13 // limitations under the License. |
14 | 14 |
15 #include "util/posix/close_multiple.h" | 15 #include "util/posix/close_multiple.h" |
16 | 16 |
17 #include <dirent.h> | 17 #include <dirent.h> |
18 #include <errno.h> | 18 #include <errno.h> |
19 #include <fcntl.h> | 19 #include <fcntl.h> |
20 #include <limits.h> | 20 #include <limits.h> |
21 #include <stdlib.h> | 21 #include <stdlib.h> |
22 #include <string.h> | 22 #include <string.h> |
23 #include <unistd.h> | 23 #include <unistd.h> |
24 | 24 |
25 #include <algorithm> | 25 #include <algorithm> |
| 26 #include <memory> |
26 | 27 |
27 #include "base/logging.h" | 28 #include "base/logging.h" |
28 #include "base/memory/scoped_ptr.h" | |
29 #include "base/posix/eintr_wrapper.h" | 29 #include "base/posix/eintr_wrapper.h" |
30 #include "build/build_config.h" | 30 #include "build/build_config.h" |
31 #include "util/misc/implicit_cast.h" | 31 #include "util/misc/implicit_cast.h" |
32 #include "util/numeric/safe_assignment.h" | 32 #include "util/numeric/safe_assignment.h" |
33 | 33 |
34 // Everything in this file is expected to execute between fork() and exec(), | 34 // Everything in this file is expected to execute between fork() and exec(), |
35 // so everything called here must be acceptable in this context. However, | 35 // so everything called here must be acceptable in this context. However, |
36 // logging code that is not expected to execute under normal circumstances is | 36 // logging code that is not expected to execute under normal circumstances is |
37 // currently permitted. | 37 // currently permitted. |
38 | 38 |
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66 struct ScopedDIRCloser { | 66 struct ScopedDIRCloser { |
67 void operator()(DIR* dir) const { | 67 void operator()(DIR* dir) const { |
68 if (dir) { | 68 if (dir) { |
69 if (closedir(dir) < 0) { | 69 if (closedir(dir) < 0) { |
70 PLOG(ERROR) << "closedir"; | 70 PLOG(ERROR) << "closedir"; |
71 } | 71 } |
72 } | 72 } |
73 } | 73 } |
74 }; | 74 }; |
75 | 75 |
76 using ScopedDIR = scoped_ptr<DIR, ScopedDIRCloser>; | 76 using ScopedDIR = std::unique_ptr<DIR, ScopedDIRCloser>; |
77 | 77 |
78 // This function implements CloseMultipleNowOrOnExec() using an operating | 78 // This function implements CloseMultipleNowOrOnExec() using an operating |
79 // system-specific FD directory to determine which file descriptors are open. | 79 // system-specific FD directory to determine which file descriptors are open. |
80 // This is an advantage over looping over all possible file descriptors, because | 80 // This is an advantage over looping over all possible file descriptors, because |
81 // no attempt needs to be made to close file descriptors that are not open. | 81 // no attempt needs to be made to close file descriptors that are not open. |
82 bool CloseMultipleNowOrOnExecUsingFDDir(int fd, int preserve_fd) { | 82 bool CloseMultipleNowOrOnExecUsingFDDir(int fd, int preserve_fd) { |
83 #if defined(OS_MACOSX) | 83 #if defined(OS_MACOSX) |
84 const char kFDDir[] = "/dev/fd"; | 84 const char kFDDir[] = "/dev/fd"; |
85 #elif defined(OS_LINUX) | 85 #elif defined(OS_LINUX) |
86 const char kFDDir[] = "/proc/self/fd"; | 86 const char kFDDir[] = "/proc/self/fd"; |
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149 max_fd = std::max(max_fd, getdtablesize()); | 149 max_fd = std::max(max_fd, getdtablesize()); |
150 | 150 |
151 for (int entry_fd = fd; entry_fd < max_fd; ++entry_fd) { | 151 for (int entry_fd = fd; entry_fd < max_fd; ++entry_fd) { |
152 if (entry_fd != preserve_fd) { | 152 if (entry_fd != preserve_fd) { |
153 CloseNowOrOnExec(entry_fd, true); | 153 CloseNowOrOnExec(entry_fd, true); |
154 } | 154 } |
155 } | 155 } |
156 } | 156 } |
157 | 157 |
158 } // namespace crashpad | 158 } // namespace crashpad |
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