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# What does this PR do? A PTY is unnecessary for interactive mode since `subprocess.run()` already inherits the calling terminal’s stdin, stdout, and stderr, allowing natural interaction. Using a PTY can introduce unwanted side effects like buffering issues and inconsistent signal handling. Standard input/output is sufficient for most interactive programs. This commit simplifies the command execution by: 1. Removing PTY-based execution in favor of direct subprocess handling 2. Consolidating command execution into a single run_command function 3. Improving error handling with specific subprocess error types 4. Adding proper type hints and documentation 5. Maintaining Ctrl+C handling for graceful interruption ## Test Plan ``` llama stack run ``` Signed-off-by: Sébastien Han <seb@redhat.com> |
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