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import sys import yaml with open(sys.argv[1]) as fp: data = fp.read() if not data.find("---") == 0: # no head print("NO YAML HEAD FOUND") sys.exit(-1) data = data[3:] head_end = data.find("---") head = data[0:head_end] data = data[head_end+3:] metadata = yaml.safe_load(head) cats = metadata.pop('categories', None) if cats != None: if type(cats) == list: tags = cats elif type(cats) == str: tags = cats.split() tags = list(map(lambda t: t.lower(), tags)) metadata["tags"] = ", ".join(tags) new_data = f"---\n{yaml.dump(metadata, default_flow_style=False)}---{data}" # write it print(f"coverted: categories to tags: {tags} - {sys.argv[1]}") with open(sys.argv[1], "w") as fp: fp.write(new_data) sys.exit(0) if not metadata.get("tags", None): metadata["tags"] = "untagged" new_data = f"---\n{yaml.dump(metadata, default_flow_style=False)}---{data}" print(f"untagged: {sys.argv[1]}") # write it with open(sys.argv[1], "w") as fp: fp.write(new_data) sys.exit(0) print("No changes needed")
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comments | date | layout | tags | title |
---|---|---|---|---|
true | 2015-02-21 00:41 | post | mac, osx, syslog, cheatsheet | Syslog on Mac OS X: Cheat Sheet |
This is a quick cheatsheet to work with syslog(1)
implementation OS X uses.
Console.app
provides a nice UI to access logs in mac, you can do some basic filtering and search, but its limited in terms of raw control a terminal gives you.
/usr/bin/syslog
can be used to both send and receive logs. Alternatively logger(1)
can be used to send logs to syslog.
Print logs from a specific facilitiy
# -w: similar to tailf
syslog -k Facility local1 -w
Sending logs
# -l severity level
syslog -s "message"
Sending logs upstream to another syslog server
Syslog can forward your logs too. The configuration resides in /etc/syslog.conf
. You can append forwarding rules in this file, format is
# Tab separated
Facility.Level @IPADDR:PORT
After this reload syslog daemon.
sudo launchctl unload /System/Library/LaunchDaemons/com.apple.syslogd.plist
sudo launchctl load /System/Library/LaunchDaemons/com.apple.syslogd.plistp
Extra reading
asl.conf(5)
- Configuration file for Apple Syslog Log (A syslog superset apple implements), this is where all the logic to route logs are set facility.level