58b20109cf
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")
41 lines
1.6 KiB
Markdown
41 lines
1.6 KiB
Markdown
---
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comments: true
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date: 2015-02-21 00:41
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layout: post
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tags: mac, osx, syslog, cheatsheet
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title: 'Syslog on Mac OS X: Cheat Sheet'
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---
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This is a quick cheatsheet to work with [`syslog(1)`](https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man1/syslog.1.html) implementation OS X uses.
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`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.
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`/usr/bin/syslog` can be used to both send and receive logs. Alternatively [`logger(1)`](https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man1/logger.1.html) can be used to send logs to syslog.
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## Print logs from a specific facilitiy
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```bash
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# -w: similar to tailf
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syslog -k Facility local1 -w
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```
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## Sending logs
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```bash
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# -l severity level
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syslog -s "message"
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```
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## Sending logs upstream to another syslog server
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Syslog can forward your logs too. The configuration resides in `/etc/syslog.conf`. You can append forwarding rules in this file, format is
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```
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# Tab separated
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Facility.Level @IPADDR:PORT
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```
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After this reload syslog daemon.
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```
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sudo launchctl unload /System/Library/LaunchDaemons/com.apple.syslogd.plist
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sudo launchctl load /System/Library/LaunchDaemons/com.apple.syslogd.plistp
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```
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# Extra reading
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1. [`asl.conf(5)`](https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man5/asl.conf.5.html) - Configuration file for Apple Syslog Log (A syslog superset apple implements), this is where all the logic to route logs are set
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facility.level
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