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1# Copyright (c) 2011, Google Inc. All rights reserved.
2#
3# Redistribution and use in source and binary forms, with or without
4# modification, are permitted provided that the following conditions are
5# met:
6#
7#     * Redistributions of source code must retain the above copyright
8# notice, this list of conditions and the following disclaimer.
9#     * Redistributions in binary form must reproduce the above
10# copyright notice, this list of conditions and the following disclaimer
11# in the documentation and/or other materials provided with the
12# distribution.
13#     * Neither the name of Google Inc. nor the names of its
14# contributors may be used to endorse or promote products derived from
15# this software without specific prior written permission.
16#
17# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29import re
30
31
32class CrashLogs(object):
33    def __init__(self, host):
34        self._host = host
35
36    def find_newest_log(self, process_name, pid=None, include_errors=False, newer_than=None):
37        if self._host.platform.is_mac():
38            return self._find_newest_log_darwin(process_name, pid, include_errors, newer_than)
39        return None
40
41    def _log_directory_darwin(self):
42        log_directory = self._host.filesystem.expanduser("~")
43        log_directory = self._host.filesystem.join(log_directory, "Library", "Logs")
44        if self._host.filesystem.exists(self._host.filesystem.join(log_directory, "DiagnosticReports")):
45            log_directory = self._host.filesystem.join(log_directory, "DiagnosticReports")
46        else:
47            log_directory = self._host.filesystem.join(log_directory, "CrashReporter")
48        return log_directory
49
50    def _find_newest_log_darwin(self, process_name, pid, include_errors, newer_than):
51        def is_crash_log(fs, dirpath, basename):
52            return basename.startswith(process_name + "_") and basename.endswith(".crash")
53
54        log_directory = self._log_directory_darwin()
55        logs = self._host.filesystem.files_under(log_directory, file_filter=is_crash_log)
56        first_line_regex = re.compile(r'^Process:\s+(?P<process_name>.*) \[(?P<pid>\d+)\]$')
57        errors = ''
58        for path in reversed(sorted(logs)):
59            try:
60                if not newer_than or self._host.filesystem.mtime(path) > newer_than:
61                    f = self._host.filesystem.read_text_file(path)
62                    match = first_line_regex.match(f[0:f.find('\n')])
63                    if match and match.group('process_name') == process_name and (pid is None or int(match.group('pid')) == pid):
64                        return errors + f
65            except IOError, e:
66                if include_errors:
67                    errors += "ERROR: Failed to read '%s': %s\n" % (path, str(e))
68            except OSError, e:
69                if include_errors:
70                    errors += "ERROR: Failed to read '%s': %s\n" % (path, str(e))
71
72        if include_errors and errors:
73            return errors
74        return None
75