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Update lnav note with custom format

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Talia 2022-05-20 14:10:37 +02:00
parent 1eb69dab7f
commit 245c6523d4
2 changed files with 48 additions and 2 deletions
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46
notebook/Linux/Tools/lnav.md
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@ -4,3 +4,49 @@ tags: debugging logs terminal
# LNav
[lnav](https://lnav.org) is a #terminal logfile viewer based on #curses.
## Custom Formats:
lnav supports adding [custom format descriptions](https://docs.lnav.org/en/latest/formats.html) to parse Log formats that lack built-in support.
```json
{
"$schema": "https://lnav.org/schemas/format-v1.schema.json",
"example": {
"title": "Example Format",
"description": "A generic example for how to make a custom lnav Format",
"url": "https://example.org/",
"regex": {
"line": {
"pattern": "^(?<timestamp>[\\d-]{10} [\\d:]{8}) [-+]\\d{4} \\[(?<level>[A-Z]+)\\] (?<src_file>[^:]+):(?<src_line>\\d+) -- (?<body>.*)$"
}
},
"timestamp-format": "%Y-%m-%d %H:%M:%S %z",
"level-field": "level",
"level": {
"fatal": "FATAL",
"error": "ERROR",
"warning": "WARNING",
"info": "INFO",
"debug": "DEBUG"
},
"value": {
"src_line": {
"kind": "integer",
"foreign-key": true
},
"src_file": {
"kind": "string",
"identifier": true,
"foreign-key": true
}
},
"sample": [
{ "line": "2022-05-20 11:10:54 +0200 [FATAL] test.lua:8 -- Fatal" },
{ "line": "2022-05-20 11:10:54 +0200 [ERROR] test.lua:9 -- Error" },
{ "line": "2022-05-20 11:10:54 +0200 [WARN] test.lua:10 -- Warn" },
{ "line": "2022-05-20 11:10:54 +0200 [INFO] test.lua:11 -- Info" },
{ "line": "2022-05-20 11:10:54 +0200 [DEBUG] test.lua:12 -- Debug" }
]
}
}
```