1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
// Copyright 2010 The Kyua Authors.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of Google Inc. nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#if !defined(UTILS_PROCESS_CHILD_IPP)
#define UTILS_PROCESS_CHILD_IPP
#include <cstdlib>
#include "utils/process/child.hpp"
namespace utils {
namespace process {
/// Spawns a new subprocess and redirects its stdout and stderr to files.
///
/// If the subprocess cannot be completely set up for any reason, it attempts to
/// dump an error message to its stderr channel and it then calls std::abort().
///
/// \param hook The function to execute in the subprocess. Must not return.
/// \param stdout_file The name of the file in which to store the stdout.
/// \param stderr_file The name of the file in which to store the stderr.
///
/// \return A new child object, returned as a dynamically-allocated object
/// because children classes are unique and thus noncopyable.
///
/// \throw process::system_error If the process cannot be spawned due to a
/// system call error.
template< typename Hook >
std::auto_ptr< child >
child::fork_files(Hook hook, const fs::path& stdout_file,
const fs::path& stderr_file)
{
std::auto_ptr< child > child = fork_files_aux(stdout_file, stderr_file);
if (child.get() == NULL) {
try {
hook();
std::abort();
} catch (const std::runtime_error& e) {
detail::report_error_and_abort(e);
} catch (...) {
detail::report_error_and_abort();
}
}
return child;
}
/// Spawns a new subprocess and multiplexes and captures its stdout and stderr.
///
/// If the subprocess cannot be completely set up for any reason, it attempts to
/// dump an error message to its stderr channel and it then calls std::abort().
///
/// \param hook The function to execute in the subprocess. Must not return.
///
/// \return A new child object, returned as a dynamically-allocated object
/// because children classes are unique and thus noncopyable.
///
/// \throw process::system_error If the process cannot be spawned due to a
/// system call error.
template< typename Hook >
std::auto_ptr< child >
child::fork_capture(Hook hook)
{
std::auto_ptr< child > child = fork_capture_aux();
if (child.get() == NULL) {
try {
hook();
std::abort();
} catch (const std::runtime_error& e) {
detail::report_error_and_abort(e);
} catch (...) {
detail::report_error_and_abort();
}
}
return child;
}
} // namespace process
} // namespace utils
#endif // !defined(UTILS_PROCESS_CHILD_IPP)
|
