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sigusr1 / sigint signal handler to print current file infos #286

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sigusr1 / sigint signal handler to print current file infos #286

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38 changes: 37 additions & 1 deletion attic/archiver.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,8 +3,10 @@
from datetime import datetime
from operator import attrgetter
import functools
import inspect
import io
import os
import signal
import stat
import sys
import textwrap
Expand All @@ -14,7 +16,7 @@
from attic.repository import Repository
from attic.cache import Cache
from attic.key import key_creator
from attic.helpers import Error, location_validator, format_time, \
from attic.helpers import Error, location_validator, format_time, format_file_size, \
format_file_mode, ExcludePattern, exclude_path, adjust_patterns, to_localtime, \
get_cache_dir, get_keys_dir, format_timedelta, prune_within, prune_split, \
Manifest, remove_surrogates, update_excludes, format_archive, check_extension_modules, Statistics, \
Expand Down Expand Up @@ -718,11 +720,45 @@ def run(self, args=None):
return args.func(args)


def sig_info_handler(signum, stack):
"""search the stack for infos about the currently processed file and print them"""
for frame in inspect.getouterframes(stack):
func, loc = frame[3], frame[0].f_locals
if func in ('process_file', '_process', ): # attic create
path = loc['path']
try:
pos = loc['fd'].tell()
total = loc['st'].st_size
except Exception:
pos, total = 0, 0
print("{0} {1}/{2}".format(path, format_file_size(pos), format_file_size(total)))
break
if func in ('extract_item', ): # attic extract
path = loc['item'][b'path']
try:
pos = loc['fd'].tell()
except Exception:
pos = 0
print("{0} {1}/???".format(path, format_file_size(pos)))
break


def setup_signal_handlers():
sigs = []
if hasattr(signal, 'SIGUSR1'):
sigs.append(signal.SIGUSR1) # kill -USR1 pid
if hasattr(signal, 'SIGINFO'):
sigs.append(signal.SIGINFO) # kill -INFO pid (or ctrl-t)
for sig in sigs:
signal.signal(sig, sig_info_handler)


def main():
# Make sure stdout and stderr have errors='replace') to avoid unicode
# issues when print()-ing unicode file names
sys.stdout = io.TextIOWrapper(sys.stdout.buffer, sys.stdout.encoding, 'replace', line_buffering=True)
sys.stderr = io.TextIOWrapper(sys.stderr.buffer, sys.stderr.encoding, 'replace', line_buffering=True)
setup_signal_handlers()
archiver = Archiver()
try:
exit_code = archiver.run(sys.argv[1:])
Expand Down