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#!/usr/bin/python3

# Process all pending crashes and mark them for whoopsie upload, but do not
# upload them to any other crash database. Wait until whoopsie is done
# uploading.
#
# Copyright (c) 2013 Canonical Ltd.
# Author: Martin Pitt <martin.pitt@ubuntu.com>
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2 of the License, or (at your
# option) any later version.  See http://www.gnu.org/copyleft/gpl.html for
# the full text of the license.

import os
import stat
import sys
import time
import subprocess
import argparse
import fcntl
import errno

import apport.fileutils
import apport

def process_report(report):
    '''Collect information for a report and mark for whoopsie upload

errors.ubuntu.com does not collect any hook data anyway, so we do not need
    to bother collecting it.

Return path of upload stamp if report was successfully processed, or None
    otherwise.
    '''
    upload_stamp = '%s.upload' % report.rsplit('.', 1)[0]
    if os.path.exists(upload_stamp):
        print('%s already marked for upload, skipping' % report)
        return upload_stamp

report_stat = None

r = apport.Report()
    # make sure we're actually on the hook to write this updated report
    # before we start doing expensive collection operations
    try:
        with open(report, 'rb') as f:
            try:
                fcntl.flock(f, fcntl.LOCK_EX | fcntl.LOCK_NB)
            except IOError:
                print('%s already being processed, skipping' % report)
                return None
            r.load(f, binary='compressed')
            report_stat = os.stat(report)
    except Exception as e:
        sys.stderr.write('ERROR: cannot load %s: %s\n' % (report, str(e)))
        return None
    if r.get('ProblemType', '') != 'Crash' and 'ExecutablePath' not in r:
        print('  skipping, not a crash')
        return None
    if 'Dependencies' in r:
        print('%s already has info collected' % report)
    else:
        print('Collecting info for %s...' % report)
        r.add_os_info()
        try:
            r.add_package_info()
        except (SystemError, ValueError) as e:
            sys.stderr.write('ERROR: cannot add package info on %s: %s\n' %
                             (report, str(e)))
            return None
        # add information from package specific hooks
        try:
            r.add_hooks_info(None)
        except Exception as e:
            sys.stderr.write('WARNING: hook failed for processing %s: %s\n' % (report, str(e)))

try:
            r.add_gdb_info()
        except (IOError, EOFError, OSError) as e:
            if hasattr(e, 'errno'):
                # calling add_gdb_info raises ENOENT if the crash's executable
                # is missing or gdb is not available but apport-retrace could
                # still process it
                if e.errno != errno.ENOENT:
                    sys.stderr.write('ERROR: processing %s: %s\n' % (report, str(e)))
                    if os.path.exists(report):
                        os.unlink(report)
                    return None

# write updated report, we use os.open and os.fdopen as
        # /proc/sys/fs/protected_regular is set to 1 (LP: #1848064)
        # make sure the file isn't a FIFO or symlink
        try:
            fd = os.open(report, os.O_NOFOLLOW | os.O_WRONLY | os.O_APPEND | os.O_NONBLOCK)
        except FileNotFoundError:
            # The crash report was deleted. Nothing left to do.
            return None
        st = os.fstat(fd)
        if stat.S_ISREG(st.st_mode):
            with os.fdopen(fd, 'wb') as f:
                os.fchmod(fd, 0)
                r.write(f, only_new=True)
                os.fchmod(fd, 0o640)

# now tell whoopsie to upload the report
    print('Marking %s for whoopsie upload' % report)
    apport.fileutils.mark_report_upload(report)
    assert os.path.exists(upload_stamp)
    os.chown(upload_stamp, report_stat.st_uid, report_stat.st_gid)
    return upload_stamp

def collect_info():
    '''Collect information for all reports

Return set of all generated upload stamps.
    '''
    if os.geteuid() != 0:
        sys.stderr.write('WARNING: Not running as root, cannot process reports'
                         ' which are not owned by uid %i\n' % os.getuid())

stamps = set()
    reports = apport.fileutils.get_all_reports()
    for r in reports:
        res = process_report(r)
        if res:
            stamps.add(res)

return stamps

def wait_uploaded(stamps, timeout):
    '''Wait until all reports were uploaded.

Times out after a given number of seconds.

Return True if all reports were uploaded, False if there are some missing.
    '''
    print('Waiting for whoopsie to upload reports (timeout: %i s)' % timeout)

while timeout >= 0:
        # determine missing stamps
        missing = ''
        for stamp in stamps:
            uploaded = stamp + 'ed'
            if os.path.exists(stamp) and not os.path.exists(uploaded):
                missing += uploaded + ' '
        if not missing:
            return True

print('  missing (remaining: %i s): %s' % (timeout, missing))
        time.sleep(10)
        timeout -= 10

return False

#
# main
#
parser = argparse.ArgumentParser(description='Noninteractively upload all '
                                 'Apport crash reports to errors.ubuntu.com')
parser.add_argument('-t', '--timeout', default=0, type=int,
                    help='seconds to wait for whoopsie to upload the reports (default: do not wait)')
opts = parser.parse_args()

# parse args

# verify that whoopsie is running
if subprocess.call(['pidof', 'whoopsie'], stdout=subprocess.PIPE) != 0:
    sys.stderr.write('ERROR: whoopsie is not running\n')
    sys.exit(1)

stamps = collect_info()
# print('stamps:', stamps)
if stamps:
    if opts.timeout > 0:
        if not wait_uploaded(stamps, opts.timeout):
            sys.exit(2)
        print('All reports uploaded successfully')
    else:
        print('All reports processed')