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added btree data dump

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Pat Beirne
2021-07-29 15:13:45 -04:00
parent 7c246a73dc
commit baffd3bf31
2 changed files with 30 additions and 8 deletions
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README.md
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@@ -122,13 +122,12 @@ In its present form, the module has these limitations:
* filenames are limited to 255 chars
* file contents must be text
* or have a `\n` at least every 4096 characters
* `sed()` requires lines <=2048 characters, and this `sed()` won't match binary chars
* `sed()` requires lines <=2048 characters, and this `sed()` will not match binary chars
* in the simple shell
* filenames must not have spaces
* patterns with spaces ***must*** be quoted
* the target of `cp` and `mv` *cannot* be a simple a directory-name as in Linux; write the whole filename *w.r.t,* the current directory
* for the `sed` function and command, the
[search](https://docs.micropython.org/en/latest/library/ure.html) pattern can have wildcards like ``\s`, `\w` and `\d`. The replace pattern cannot have *any* of these, and can only have `\0`, `\1`, etc
* the target of `cp` and `mv` *cannot* be a simple a directory-name as in Linux; write the whole filename *w.r.t* the current directory
* for the `sed` function and command, the [search](https://docs.micropython.org/en/latest/library/ure.html) pattern can have wildcards like ``\s`, `\w` and `\d`. The replace pattern cannot have *any* of these, and can only have `\0`, `\1`, etc
* search patterns involving \ escapes other than those and `\'` probably won't work
* the complexity of pattern matching is limited.
* try to format the grep patterns so they avoid deep stack recursion. For example, `([^#]|\\#)\s*` has a very generous search term as the first half, and can cause deep-stack recursion. The equivalent `(\\#|[^#])\s*` is more likely to succeed.
@@ -230,6 +229,7 @@ exec <python-filename> # execute a small python file
free # display the heap size: used + free
wc <filename> # display the line count, word count and bytes
less/more [-n] <filename> # similar to cat, but displays 30 lines at a time
btree <filename> # display the content of a BTREE database
```
Synonyms: `ip = ifconfig`, `more = less`, `dig = nslookup = host`