在OS X 10.10.4上使用Python 3.5,我在输出syslog消息中得到假的]
个字符。这可以通过以下示例程序看出:
#!/usr/bin/env python3
import logging
import logging.handlers
logger = logging.getLogger('test')
syslog_handler = logging.handlers.SysLogHandler(address='/var/run/syslog')
syslog_formatter = logging.Formatter('[{process}] {message}', style='{')
syslog_handler.setFormatter(syslog_formatter)
logger.addHandler(syslog_handler)
logger.error("Test : ABC")
如果我运行它,我会看到这样的syslog输出:
Dec 16 12:38:33 mymachinename [76399] Test]: ABC
(请注意]
之后的虚假Test
字符。
如果我稍微更改格式化程序字符串以删除最初的[
字符,则额外的]
会消失。但是,我希望这个文字字符出现在格式化的字符串中(即使它不在格式化字符串的开头,我也有同样的问题。)
为什么会出现虚假的]
,我该如何避免呢?
OS X' s asl.conf
,这是配置日志记录的地方,如下所示。我没有从默认值中修改它:
##
# configuration file for syslogd and aslmanager
##
# authpriv messages are root/admin readable
? [= Facility authpriv] access 0 80
# remoteauth critical, alert, and emergency messages are root/admin readable
? [= Facility remoteauth] [<= Level critical] access 0 80
# broadcast emergency messages
? [= Level emergency] broadcast
# save kernel [PID 0] and launchd [PID 1] messages
? [<= PID 1] store
# ignore "internal" facility
? [= Facility internal] ignore
# save everything from emergency to notice
? [<= Level notice] store
# Rules for /var/log/system.log
> system.log mode=0640 format=bsd rotate=seq compress file_max=5M all_max=50M
? [= Sender kernel] file system.log
? [<= Level notice] file system.log
? [= Facility auth] [<= Level info] file system.log
? [= Facility authpriv] [<= Level info] file system.log
? [= Facility user] [<= Level debug] file system.log
# Facility com.apple.alf.logging gets saved in appfirewall.log
? [= Facility com.apple.alf.logging] file appfirewall.log file_max=5M all_max=
我不在Ubuntu 10.04上看到相同的问题,因此它似乎是特定于OS X的。
答案 0 :(得分:4)
更新:
知道了。修复格式化字符串以遵守BSD syslog格式:
syslog_formatter = logging.Formatter('[{process}]: {message}', style='{')
...
logger.error("Test : ABC")
你得到:
Aug 23 21:38:02 mymachine [65057]: Test : ABC
背景/原始帖子
我在OS X 10.11.6上重现了你的错误
Aug 23 21:10:15 machine-name [64643] Test]: ABC
冒号绝对是罪魁祸首。我将消息更改为:
logger.error("Test ABC")
然后日志条目正常:
Aug 23 21:15:03 machine Unknown: [64701] Test ABC
我认为冒号被解释为格式化字符,因为您正在使用BSD格式化选项。来自BSD syslog rfc:
the first character of the CONTENT field that signifies the conclusion of
the TAG field has been seen to be the left square bracket character ("["),
a colon character (":"), or a space character. This is explained in more
detail in Section 5.3.
那么OS X系统日志可能会尝试遵守BSD Syslog RFC而感到困惑?