lib/_emerge/emergelog.py

# Copyright 1999-2013 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

import io
import time
import portage
from portage import os
from portage import _encodings
from portage import _unicode_decode
from portage import _unicode_encode
from portage.data import secpass
from portage.output import xtermTitle

# We disable emergelog by default, since it's called from
# dblink.merge() and we don't want that to trigger log writes
# unless it's really called via emerge.
_disable = True
_emerge_log_dir = "/var/log"


def emergelog(xterm_titles, mystr, short_msg=None):

    if _disable:
        return

    mystr = _unicode_decode(mystr)

    if short_msg is not None:
        short_msg = _unicode_decode(short_msg)

    if xterm_titles and short_msg:
        if "HOSTNAME" in os.environ:
            short_msg = os.environ["HOSTNAME"] + ": " + short_msg
        xtermTitle(short_msg)
    try:
        file_path = os.path.join(_emerge_log_dir, "emerge.log")
        existing_log = os.path.exists(file_path)
        mylogfile = io.open(
            _unicode_encode(file_path, encoding=_encodings["fs"], errors="strict"),
            mode="a",
            encoding=_encodings["content"],
            errors="backslashreplace",
        )
        if not existing_log:
            portage.util.apply_secpass_permissions(
                file_path, uid=portage.portage_uid, gid=portage.portage_gid, mode=0o660
            )
        mylock = portage.locks.lockfile(file_path)
        try:
            mylogfile.write("%.0f: %s\n" % (time.time(), mystr))
            mylogfile.close()
        finally:
            portage.locks.unlockfile(mylock)
    except (IOError, OSError, portage.exception.PortageException) as e:
        if secpass >= 1:
            portage.util.writemsg("emergelog(): %s\n" % (e,), noiselevel=-1)