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errno: Look up errors by name as well as number

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eg, `errno enotsup` now shows the description and number for ENOTSUP.
This commit is contained in:
Sam Atkins 2023-05-11 13:15:01 +01:00 committed by Andreas Kling
parent a22a6c371e
commit 23dd16febe
Notes: sideshowbarker 2024-07-17 17:49:11 +09:00 
Author: https://github.com/AtkinsSJ
Commit: https://github.com/SerenityOS/serenity/commit/23dd16febe
Pull-request: https://github.com/SerenityOS/serenity/pull/18768
1 changed files with 17 additions and 12 deletions
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21
Userland/Utilities/errno.cpp
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@ -22,7 +22,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
StringView keyword;
Core::ArgsParser args_parser;
args_parser.add_positional_argument(keyword, "Error number or string to search", "keyword", Core::ArgsParser::Required::No);
args_parser.add_positional_argument(keyword, "Error number or name to look up", "keyword", Core::ArgsParser::Required::No);
args_parser.add_option(list, "List all errno values", "list", 'l');
args_parser.add_option(search, "Search for error descriptions containing keyword", "search", 's');
args_parser.parse(arguments);
@ -54,19 +54,24 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
return 0;
}
auto maybe_error_code = keyword.to_int();
if (!maybe_error_code.has_value()) {
warnln("ERROR: Not understood: {}", keyword);
return 1;
}
if (auto maybe_error_code = keyword.to_int(); maybe_error_code.has_value()) {
auto error_code = maybe_error_code.value();
auto error = strerror(error_code);
if (error == "Unknown error"sv) {
warnln("ERROR: Unknown errno: {}", keyword);
return 1;
}
output_errno_description(error_code, error);
return 0;
}
for (int i = 0; i < sys_nerr; i++) {
if (keyword.equals_ignoring_ascii_case(s_errno_names[i])) {
output_errno_description(i, strerror(i));
return 0;
}
}
warnln("ERROR: Not understood: {}", keyword);
return 1;
}