42 lines
906 B
C++
42 lines
906 B
C++
#include <luna/String.h>
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#include <os/ArgumentParser.h>
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#include <os/File.h>
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using os::File;
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static Result<void> do_cat(StringView path)
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{
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SharedPtr<File> f = TRY(File::open_input_file(path));
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auto out = File::standard_output();
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auto buf = TRY(Buffer::create_sized(4096));
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while (1)
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{
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TRY(f->read(buf, 4096));
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if (buf.is_empty()) break;
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out->write(buf);
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}
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return {};
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}
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Result<int> luna_main(int argc, char** argv)
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{
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StringView filename;
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Vector<StringView> files;
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os::ArgumentParser parser;
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parser.add_description("Concatenate files to standard output."_sv);
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parser.add_system_program_info("cat"_sv);
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parser.add_positional_argument(filename, "file"_sv, "-"_sv);
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parser.set_vector_argument(files);
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parser.parse(argc, argv);
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TRY(do_cat(filename));
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for (auto file : files) TRY(do_cat(file));
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return 0;
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}
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