[PR] include/unistd: add dpopen/dpclose declarations [nuttx]

["cuiziweizw (via GitHub)" <gi...@apache.org>]

cuiziweizw opened a new pull request, #19008:
URL: https://github.com/apache/nuttx/pull/19008

   ## Summary
   
   Add declarations for `dpopen()` and `dpclose()` to `unistd.h`. These are
   the descriptor-based counterparts of `popen()`/`pclose()` declared in
   `stdio.h`. The implementation lives in `apps/system/popen/dpopen.c`.
   
   This is the header-side change. The implementation, no-shell mode support,
   and tests are in the companion apps PR:
   apache/nuttx-apps#__APPS_PR__
   
   ## Impact
   
   Header-only change; declares two new public interfaces.
   
   ## Testing
   
   Built and tested together with the apps-side changes (see companion PR).


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Re: [PR] include/unistd: add dpopen/dpclose declarations [nuttx]

["lupyuen (via GitHub)" <gi...@apache.org>]

lupyuen merged PR #19008:
URL: https://github.com/apache/nuttx/pull/19008


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