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import logging
import os
import sys
from cloudinit.performance import timed
LOG = logging.getLogger(__name__)
def logexc(
log, msg, *args, log_level: int = logging.WARNING, exc_info=True
) -> None:
log.log(log_level, msg, *args)
log.debug(msg, exc_info=exc_info, *args)
@timed("Writing to console")
def write_to_console(conpath, text):
with open(conpath, "w") as wfh:
wfh.write(text)
wfh.flush()
def multi_log(
text,
console=True,
stderr=True,
log=None,
log_level=logging.DEBUG,
fallback_to_stdout=True,
):
if stderr:
sys.stderr.write(text)
if console:
conpath = "/dev/console"
writing_to_console_worked = False
if os.path.exists(conpath):
try:
write_to_console(conpath, text)
writing_to_console_worked = True
except OSError:
console_error = "Failed to write to /dev/console"
sys.stdout.write(f"{console_error}\n")
if log:
log.log(logging.WARNING, console_error)
if fallback_to_stdout and not writing_to_console_worked:
# A container may lack /dev/console (arguably a container bug).
# Additionally, /dev/console may not be writable to on a VM (again
# likely a VM bug or virtualization bug).
#
# If either of these is the case, then write output to stdout.
# This will result in duplicate stderr and stdout messages if
# stderr was True.
#
# even though systemd might have set up output to go to
# /dev/console, the user may have configured elsewhere via
# cloud-config 'output'. If there is /dev/console, messages will
# still get there.
sys.stdout.write(text)
if log:
if text[-1] == "\n":
log.log(log_level, text[:-1])
else:
log.log(log_level, text)
def error(msg, rc=1, fmt="Error:\n{}", sys_exit=False):
r"""Print error to stderr and return or exit
@param msg: message to print
@param rc: return code (default: 1)
@param fmt: format string for putting message in (default: 'Error:\n {}')
@param sys_exit: exit when called (default: false)
"""
print(fmt.format(msg), file=sys.stderr)
if sys_exit:
sys.exit(rc)
return rc
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