parse_bool(9)

💅 parse_bool(9) — the kernel API manual, bestie edition 🎀

okay so this is parse_bool, straight out of the Kernel API Manual, and honestly? she's a tiny little function with main character energy. all she does is take a string and turn it into a bool. that's it. that's the girl. ✨

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🌸 NAME 🌸

parse_bool — literally just parse a two-valued option into a bool, no cap 💖

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✨ SYNOPSIS ✨

int parse_bool (const char *bool_str , const char *true_str , const char
*false_str , bool *bool_ptr );

like, four args, one int back. iconic. 🦋

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🫶 ARGUMENTS 🫶

• bool_str — the string value you're trying to convert into a bool. the star of the show. the one getting vibe checked. 👑
• true_str — the string value that should get converted to true. like, if bool_str matches this, congrats, it's true. 🎀
• false_str — the string value that should get converted to false. the other member of the duo. ⭐
• bool_ptr — a pointer to return the bool value in. she's the drop-off spot. the result goes here. 💌

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🔥 RETURN 🔥

VDO_SUCCESS — slay — or an error if bool_str is neither true_str nor false_str. like, if it's neither of the two things you said were valid, bestie, that's an error, and that's on periodt. 💀

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🌈 SEE ALSO 🌈

okay this list is long long, so buckle up — everything below is a (9) reference, and the whole thing lives in the kernel file ./drivers/md/dm-vdo/dm-vdo-target.c. no i'm not skipping any of them, we don't do that here:

• free_device_config(9)
• get_version_number(9)
• parse_memory(9)
• parse_slab_size(9)
• process_one_thread_config_spec(9)
• parse_one_thread_config_spec(9)
• parse_thread_config_string(9)
• process_one_key_value_pair(9)
• parse_one_key_value_pair(9)
• parse_key_value_pairs(9)
• parse_optional_arguments(9)
• handle_parse_error(9)
• parse_device_config(9)
• get_thread_id_for_phase(9)
• advance_phase(9)
• finish_operation_callback(9)
• decode_from_super_block(9)
• decode_vdo(9)
• pre_load_callback(9)
• get_bit_array_size(9)
• grow_bit_array(9)
• allocate_instance(9)
• check_may_grow_physical(9)
• grow_layout(9)
• validate_new_device_config(9)
• write_super_block_for_suspend(9)
• suspend_callback(9)
• was_new(9)
• requires_repair(9)
• get_load_type(9)
• load_callback(9)
• handle_load_error(9)
• write_super_block_for_resume(9)
• resume_callback(9)
• grow_logical_callback(9)
• handle_logical_growth_error(9)
• perform_grow_logical(9)
• copy_partition(9)
• grow_physical_callback(9)
• handle_physical_growth_error(9)
• perform_grow_physical(9)
• apply_new_vdo_configuration(9)

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💜 friendly reminder: this page comes from ./drivers/md/dm-vdo and it's dated October 2026. if you're reading it in some other month... iykyk 🙈

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and that's the whole page, bestie — go forth and parse your bools responsibly. parse_bool(9), ./drivers/md/dm-vdo, October 2026. mwah 💋🦋🌸