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Shell: Add builtin command to reset the internal state
The new builtin command "reset" now resets the entire internal state by virtually destructing the Shell state and re-constructing it. This helps for example when setting a new hostname and wanting to view it in the current Shell program.
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fb60db7b00
Notes:
sideshowbarker
2024-07-17 07:14:09 +09:00
Author: https://github.com/supercomputer7 Commit: https://github.com/SerenityOS/serenity/commit/fb60db7b00 Pull-request: https://github.com/SerenityOS/serenity/pull/20491 Reviewed-by: https://github.com/alimpfard
@ -149,6 +149,17 @@ ErrorOr<int> Shell::builtin_where(Main::Arguments arguments)
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return at_least_one_succeded ? 0 : 1;
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}
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ErrorOr<int> Shell::builtin_reset(Main::Arguments)
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{
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destroy();
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initialize(m_is_interactive);
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// NOTE: As the last step before returning, clear (flush) the shell text entirely.
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fprintf(stderr, "\033[3J\033[H\033[2J");
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fflush(stderr);
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return 0;
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}
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ErrorOr<int> Shell::builtin_alias(Main::Arguments arguments)
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{
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Vector<DeprecatedString> aliases;
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@ -2258,9 +2258,7 @@ Shell::Shell()
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cache_path();
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}
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Shell::Shell(Line::Editor& editor, bool attempt_interactive, bool posix_mode)
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: m_in_posix_mode(posix_mode)
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, m_editor(editor)
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void Shell::initialize(bool attempt_interactive)
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{
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uid = getuid();
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tcsetpgrp(0, getpgrp());
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@ -2305,11 +2303,22 @@ Shell::Shell(Line::Editor& editor, bool attempt_interactive, bool posix_mode)
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m_editor->load_history(get_history_path());
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cache_path();
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}
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}
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Shell::Shell(Line::Editor& editor, bool attempt_interactive, bool posix_mode)
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: m_in_posix_mode(posix_mode)
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, m_editor(editor)
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{
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initialize(attempt_interactive);
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start_timer(3000);
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}
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Shell::~Shell()
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{
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destroy();
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}
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void Shell::destroy()
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{
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if (m_default_constructed)
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return;
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@ -54,6 +54,7 @@
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__ENUMERATE_SHELL_BUILTIN(wait, InAllModes) \
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__ENUMERATE_SHELL_BUILTIN(dump, InAllModes) \
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__ENUMERATE_SHELL_BUILTIN(kill, InAllModes) \
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__ENUMERATE_SHELL_BUILTIN(reset, InAllModes) \
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__ENUMERATE_SHELL_BUILTIN(noop, InAllModes) \
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__ENUMERATE_SHELL_BUILTIN(break, OnlyInPOSIXMode) \
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__ENUMERATE_SHELL_BUILTIN(continue, OnlyInPOSIXMode) \
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@ -414,6 +415,9 @@ private:
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Shell();
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virtual ~Shell() override;
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void destroy();
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void initialize(bool attempt_interactive);
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RefPtr<AST::Node> parse(StringView, bool interactive = false, bool as_command = true) const;
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void timer_event(Core::TimerEvent&) override;
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