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grep: Return exit code '2' on error

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This commit is contained in:
Karol Kosek 2023-09-14 17:40:02 +02:00 • committed by Andreas Kling
parent 5a85449b23
commit 018dcf570e
1 changed files with 23 additions and 11 deletions
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34
Userland/Utilities/grep.cpp
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@ -26,6 +26,12 @@ enum class BinaryFileMode {
Skip,
};
enum class ExitStatus {
SomethingMatched = 0,
NoLinesMatched = 1,
ErrorOccurred = 2, // NOTE: `-q` flag also silences errors.
};
template<typename... Ts>
void fail(StringView format, Ts... args)
{
@ -172,7 +178,7 @@ ErrorOr<int> serenity_main(Main::Arguments args)
for (auto& re : regular_expressions) {
if (re.parser_result.error != regex::Error::NoError) {
warnln("regex parse error: {}", regex::get_error_string(re.parser_result.error));
return 1;
return ExitStatus::ErrorOccurred;
}
}
@ -219,10 +225,10 @@ ErrorOr<int> serenity_main(Main::Arguments args)
return false;
};
bool did_match_something = false;
auto exit_status = ExitStatus::NoLinesMatched;
auto handle_file = [&matches, binary_mode, count_lines, quiet_mode,
user_specified_multiple_files, &matched_line_count, &did_match_something](StringView filename, bool print_filename) -> ErrorOr<void> {
user_specified_multiple_files, &matched_line_count, &exit_status](StringView filename, bool print_filename) -> ErrorOr<void> {
auto file = TRY(Core::File::open_file_or_standard_stream(filename, Core::File::OpenMode::Read));
auto buffered_file = TRY(Core::InputBufferedFile::create(move(file)));
if (filename == '-')
@ -235,9 +241,12 @@ ErrorOr<int> serenity_main(Main::Arguments args)
auto is_binary = line.contains('\0');
auto matched = matches(line, filename, line_number, print_filename, is_binary);
did_match_something = did_match_something || matched;
if (matched && is_binary && binary_mode == BinaryFileMode::Binary)
break;
if (matched) {
if (exit_status == ExitStatus::NoLinesMatched)
exit_status = ExitStatus::SomethingMatched;
if (is_binary && binary_mode == BinaryFileMode::Binary)
break;
}
}
if (count_lines && !quiet_mode) {
@ -251,15 +260,17 @@ ErrorOr<int> serenity_main(Main::Arguments args)
return {};
};
auto add_directory = [&handle_file, user_has_specified_files, suppress_errors](DeprecatedString base, Optional<DeprecatedString> recursive, auto handle_directory) -> void {
auto add_directory = [&handle_file, &exit_status, user_has_specified_files, suppress_errors](DeprecatedString base, Optional<DeprecatedString> recursive, auto handle_directory) -> void {
Core::DirIterator it(recursive.value_or(base), Core::DirIterator::Flags::SkipDots);
while (it.has_next()) {
auto path = it.next_full_path();
if (!FileSystem::is_directory(path)) {
// Remove leading './' when `grep -r` was run without any specified paths.
auto key = user_has_specified_files ? path.view() : path.substring_view(base.length() + 1);
if (auto result = handle_file(key, true); result.is_error() && !suppress_errors)
if (auto result = handle_file(key, true); result.is_error() && !suppress_errors) {
warnln("Failed with file {}: {}", key, result.release_error());
exit_status = ExitStatus::ErrorOccurred;
}
} else {
handle_directory(base, path, handle_directory);
@ -283,11 +294,12 @@ ErrorOr<int> serenity_main(Main::Arguments args)
auto result = handle_file(filename, print_filename);
if (result.is_error() && !suppress_errors) {
warnln("Failed with file {}: {}", filename, result.release_error());
exit_status = ExitStatus::ErrorOccurred;
}
}
}
return did_match_something ? 0 : 1;
return exit_status;
};
if (use_ere) {
@ -296,7 +308,7 @@ ErrorOr<int> serenity_main(Main::Arguments args)
auto escaped_pattern = (fixed_strings) ? escape_characters(pattern, ere_special_characters) : pattern;
regular_expressions.append(Regex<PosixExtended>(escaped_pattern, options));
}
return grep_logic(regular_expressions);
return to_underlying(grep_logic(regular_expressions));
}
Vector<Regex<PosixBasic>> regular_expressions;
@ -304,5 +316,5 @@ ErrorOr<int> serenity_main(Main::Arguments args)
auto escaped_pattern = (fixed_strings) ? escape_characters(pattern, basic_special_characters) : pattern;
regular_expressions.append(Regex<PosixBasic>(escaped_pattern, options));
}
return grep_logic(regular_expressions);
return to_underlying(grep_logic(regular_expressions));
}