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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef SANDBOX_LINUX_SERVICES_NAMESPACE_SANDBOX_H_ | 5 #ifndef SANDBOX_LINUX_SERVICES_NAMESPACE_SANDBOX_H_ |
6 #define SANDBOX_LINUX_SERVICES_NAMESPACE_SANDBOX_H_ | 6 #define SANDBOX_LINUX_SERVICES_NAMESPACE_SANDBOX_H_ |
7 | 7 |
8 #include <sys/types.h> | |
9 | |
8 #include <string> | 10 #include <string> |
9 #include <vector> | 11 #include <vector> |
10 | 12 |
11 #include "base/command_line.h" | 13 #include "base/command_line.h" |
12 #include "base/macros.h" | 14 #include "base/macros.h" |
13 #include "base/process/launch.h" | 15 #include "base/process/launch.h" |
14 #include "base/process/process.h" | 16 #include "base/process/process.h" |
15 #include "sandbox/sandbox_export.h" | 17 #include "sandbox/sandbox_export.h" |
16 | 18 |
17 namespace sandbox { | 19 namespace sandbox { |
(...skipping 22 matching lines...) Expand all Loading... | |
40 // supported (use Credentials::CanCreateProcessInNewUserNS to check this). | 42 // supported (use Credentials::CanCreateProcessInNewUserNS to check this). |
41 // | 43 // |
42 // pre_exec_delegate and clone_flags fields of LaunchOptions should be nullptr | 44 // pre_exec_delegate and clone_flags fields of LaunchOptions should be nullptr |
43 // and 0, respectively, since this function makes a copy of options and | 45 // and 0, respectively, since this function makes a copy of options and |
44 // overrides them. | 46 // overrides them. |
45 static base::Process LaunchProcess(const base::CommandLine& cmdline, | 47 static base::Process LaunchProcess(const base::CommandLine& cmdline, |
46 const base::LaunchOptions& options); | 48 const base::LaunchOptions& options); |
47 static base::Process LaunchProcess(const std::vector<std::string>& argv, | 49 static base::Process LaunchProcess(const std::vector<std::string>& argv, |
48 const base::LaunchOptions& options); | 50 const base::LaunchOptions& options); |
49 | 51 |
52 // Forks a process in its own PID namespace. The child process is the init | |
53 // process inside of the PID namespace, so if the child needs to fork further, | |
54 // it should call CreateInitProcessReaper, which turns the init process into a | |
55 // reaper process. | |
56 // | |
57 // Otherwise, the child should setup handlers for signals which should | |
58 // terminate the process using InstallDefaultTerminationSignalHandlers or | |
59 // InstallTerminationSignalHandler. This works around the fact that init | |
60 // processes ignore such signals unless they have an explicit handler set. | |
61 // | |
62 // This function requries CAP_SYS_ADMIN. If |drop_capabilities_in_child| is | |
63 // true, then capabilities are dropped in the child. | |
64 static pid_t ForkInNewPidNamespace(bool drop_capabilities_in_child); | |
65 | |
66 // Installs a signal handler for: | |
67 // | |
68 // SIGHUP, SIGINT, SIGABRT, SIGQUIT, SIGPIPE, SIGTERM, SIGUSR1, SIGUSR2 | |
69 // | |
70 // that exits with kDefaultExitCode. These are signals whose default action is | |
71 // to terminate the program (apart from SIGILL, SIGFPE, and SIGSEGV, which | |
72 // will still terminate the process if e.g. an illegal instruction is | |
73 // encountered, etc.) | |
74 static void InstallDefaultTerminationSignalHandlers(); | |
jln (very slow on Chromium)
2015/03/27 21:24:35
Add to the doc that if a signal handler already ex
rickyz (no longer on Chrome)
2015/03/27 21:48:59
Done.
| |
75 | |
76 // Installs a signal handler for |sig| which exits with |exit_code|. Existing | |
77 // signal handlers are overridden if |override_existing_handler| is true. | |
78 // Returns false if |override_existing_handler| is false and a signal handler | |
79 // was already set. | |
80 static bool InstallTerminationSignalHandler(int sig, | |
81 int exit_code, | |
82 bool override_existing_handler); | |
jln (very slow on Chromium)
2015/03/26 22:01:34
I don't think we need |override_existing_handler|,
rickyz (no longer on Chrome)
2015/03/27 21:08:03
The use case I was thinking of was that a user mig
jln (very slow on Chromium)
2015/03/27 21:24:36
Well, in that case, one could simply install the s
rickyz (no longer on Chrome)
2015/03/27 21:48:59
Ah, good point, removed.
| |
83 | |
50 // Returns whether the namespace sandbox created a new user, PID, and network | 84 // Returns whether the namespace sandbox created a new user, PID, and network |
51 // namespace. In particular, InNewUserNamespace should return true iff the | 85 // namespace. In particular, InNewUserNamespace should return true iff the |
52 // process was started via this class. | 86 // process was started via this class. |
53 static bool InNewUserNamespace(); | 87 static bool InNewUserNamespace(); |
54 static bool InNewPidNamespace(); | 88 static bool InNewPidNamespace(); |
55 static bool InNewNetNamespace(); | 89 static bool InNewNetNamespace(); |
56 | 90 |
91 static const int kDefaultExitCode = 1; | |
jln (very slow on Chromium)
2015/03/26 22:01:34
Style: static const members should go to top of th
rickyz (no longer on Chrome)
2015/03/27 21:08:03
Done.
| |
92 | |
57 private: | 93 private: |
58 DISALLOW_IMPLICIT_CONSTRUCTORS(NamespaceSandbox); | 94 DISALLOW_IMPLICIT_CONSTRUCTORS(NamespaceSandbox); |
59 }; | 95 }; |
60 | 96 |
61 } // namespace sandbox | 97 } // namespace sandbox |
62 | 98 |
63 #endif // SANDBOX_LINUX_SERVICES_NAMESPACE_SANDBOX_H_ | 99 #endif // SANDBOX_LINUX_SERVICES_NAMESPACE_SANDBOX_H_ |
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