Zepp-Hanzj commented on PR #18994:
URL: https://github.com/apache/nuttx/pull/18994#issuecomment-4576804390

   Thanks for the feedback. I've updated the PR description below.
   
   ## Description
   
   Adds documentation for the `uid` example, which previously only had "TODO".
   
   The `uid` example queries user and group information using POSIX 
`getpwuid_r()`, `getpwnam_r()`, `getgrgid_r()`, and `getgrnam_r()`.
   
   ## Changes
   
   **File**: `Documentation/applications/examples/uid/index.rst` (+111 lines)
   
   - Command syntax and options table
   - Synopsis explaining the tool's purpose
   - Usage examples for each query type (`-uid`, `-uname`, `-gid`, `-gname`, 
`-h`)
   - Configuration options from Kconfig
   
   ## Source reference
   
   All content extracted from `apps/examples/uid/uid_main.c`:
   - Options: `show_usage()` function (lines 42-51)
   - Output format: `show_pwd()` and `show_grp()` functions
   - Configuration: `apps/examples/uid/Kconfig`
   
   ## Verification
   
   - ✅ Content accuracy: all info from source code
   - ✅ Format: follows NuttX doc style
   - ✅ Build: build-html check passed
   
   Signed-off-by: hanzj <[email protected]>


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