fangpeina opened a new pull request, #18309:
URL: https://github.com/apache/nuttx/pull/18309
## Summary
This PR updates the NSH documentation to include complete redirection syntax
documentation.
## Changes
### Documentation Updates (`Documentation/applications/nsh/nsh.rst`)
1. **Added stdin redirection documentation**
- Syntax: `<cmd> < <file>`
2. **Added stderr redirection documentation** (corresponds to
nuttx-apps#3378)
- Syntax: `<cmd> 2> <file>` (overwrite mode)
- Syntax: `<cmd> 2>> <file>` (append mode)
- Syntax: `<cmd> 2>&1` (redirect stderr to stdout)
## Impact
- **Documentation only** - No code changes
- **User Experience**: Provides complete reference for NSH redirection
operators
- **Related PR**: Corresponds to stderr redirection feature in
apache/nuttx-apps#3378
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