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#
# RTEMS Tools Project (http://www.rtems.org/)
# Copyright 2010-2012 Chris Johns (chrisj@rtems.org)
# All rights reserved.
#
# This file is part of the RTEMS Tools package in 'rtems-testing'.
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#
# Log output to stdout and/or a file.
#
from __future__ import print_function
import os
import sys
import error
#
# A global log.
#
default = None
#
# Global parameters.
#
tracing = False
quiet = False
def set_default_once(log):
global default
if default is None:
default = log
def _output(text = os.linesep, log = None):
"""Output the text to a log if provided else send it to stdout."""
if text is None:
text = os.linesep
if type(text) is list:
_text = ''
for l in text:
_text += l + os.linesep
text = _text
if log:
log.output(text)
elif default is not None:
default.output(text)
else:
for l in text.replace(chr(13), '').splitlines():
print(l)
sys.stdout.flush()
def stdout_raw(text = os.linesep):
print(text, end = '')
sys.stdout.flush()
def stderr(text = os.linesep, log = None):
for l in text.replace(chr(13), '').splitlines():
print(l, file = sys.stderr)
sys.stderr.flush()
def output(text = os.linesep, log = None):
if not quiet:
_output(text, log)
def notice(text = os.linesep, log = None):
if not quiet and default is not None and not default.has_stdout():
for l in text.replace(chr(13), '').splitlines():
print(l)
sys.stdout.flush()
_output(text, log)
def trace(text = os.linesep, log = None):
if tracing:
_output(text, log)
def warning(text = os.linesep, log = None):
for l in text.replace(chr(13), '').splitlines():
notice('warning: %s' % (l), log)
def flush(log = None):
if log:
log.flush()
elif default is not None:
default.flush()
def tail(log = None):
if log is not None:
return log.tail
if default is not None:
return default.tail
return 'No log output'
class log:
"""Log output to stdout or a file."""
def __init__(self, streams = None, tail_size = 200):
self.tail = []
self.tail_size = tail_size
self.fhs = [None, None]
if streams:
for s in streams:
if s == 'stdout':
self.fhs[0] = sys.stdout
elif s == 'stderr':
self.fhs[1] = sys.stderr
else:
try:
self.fhs.append(open(s, 'w'))
except IOError as ioe:
raise error.general("creating log file '" + s + \
"': " + str(ioe))
def __del__(self):
for f in range(2, len(self.fhs)):
self.fhs[f].close()
def __str__(self):
t = ''
for tl in self.tail:
t += tl + os.linesep
return t[:-len(os.linesep)]
def _tail(self, text):
if type(text) is not list:
text = text.splitlines()
self.tail += text
if len(self.tail) > self.tail_size:
self.tail = self.tail[-self.tail_size:]
def has_stdout(self):
return self.fhs[0] is not None
def has_stderr(self):
return self.fhs[1] is not None
def output(self, text):
"""Output the text message to all the logs."""
# Reformat the text to have local line types.
text = text.replace(chr(13), '').splitlines()
self._tail(text)
out = ''
for l in text:
out += l + os.linesep
for f in range(0, len(self.fhs)):
if self.fhs[f] is not None:
self.fhs[f].write(out)
self.flush()
def flush(self):
"""Flush the output."""
for f in range(0, len(self.fhs)):
if self.fhs[f] is not None:
self.fhs[f].flush()
if __name__ == "__main__":
l = log(['stdout', 'log.txt'], tail_size = 20)
for i in range(0, 10):
l.output('log: hello world: %d\n' % (i))
l.output('log: hello world CRLF\r\n')
l.output('log: hello world NONE')
l.flush()
print('=-' * 40)
print('tail: %d' % (len(l.tail)))
print(l)
print('=-' * 40)
for i in range(0, 10):
l.output('log: hello world 2: %d\n' % (i))
l.flush()
print('=-' * 40)
print('tail: %d' % (len(l.tail)))
print(l)
print('=-' * 40)
for i in [0, 1]:
quiet = False
tracing = False
print('- quiet:%s - trace:%s %s' % (str(quiet), str(tracing), '-' * 30))
trace('trace with quiet and trace off')
notice('notice with quiet and trace off')
quiet = True
tracing = False
print('- quiet:%s - trace:%s %s' % (str(quiet), str(tracing), '-' * 30))
trace('trace with quiet on and trace off')
notice('notice with quiet on and trace off')
quiet = False
tracing = True
print('- quiet:%s - trace:%s %s' % (str(quiet), str(tracing), '-' * 30))
trace('trace with quiet off and trace on')
notice('notice with quiet off and trace on')
quiet = True
tracing = True
print('- quiet:%s - trace:%s %s' % (str(quiet), str(tracing), '-' * 30))
trace('trace with quiet on and trace on')
notice('notice with quiet on and trace on')
default = l
print('=-' * 40)
print('tail: %d' % (len(l.tail)))
print(l)
print('=-' * 40)
del l
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