51 lines
1.6 KiB
C++
51 lines
1.6 KiB
C++
#include <luna/Units.h>
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#include <os/ArgumentParser.h>
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#include <os/File.h>
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#include <sys/memstat.h>
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Result<int> luna_main(int argc, char** argv)
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{
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bool reserved { false };
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bool human_readable { false };
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os::ArgumentParser parser;
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parser.add_description("Query the amount of memory available and used in the system.");
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parser.add_system_program_info("free"_sv);
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parser.add_switch_argument(reserved, 'r', "show-reserved"_sv, "show reserved system memory"_sv);
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parser.add_switch_argument(human_readable, 'h', "human-readable"_sv, "show output in human-readable units"_sv);
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parser.parse(argc, argv);
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struct membuf buf;
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memstat(&buf);
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if (human_readable)
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{
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auto total = TRY(to_dynamic_unit(buf.mem_total, 10, false, Unit::Binary, true));
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auto free = TRY(to_dynamic_unit(buf.mem_free, 10, false, Unit::Binary, true));
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auto used = TRY(to_dynamic_unit(buf.mem_used, 10, false, Unit::Binary, true));
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os::println("%s total memory, out of which:", total.chars());
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os::println("%s used", used.chars());
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os::println("%s free", free.chars());
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}
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else
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{
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os::println("%lu total memory, out of which:", buf.mem_total);
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os::println("%lu used", buf.mem_used);
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os::println("%lu free", buf.mem_free);
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}
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if (reserved)
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{
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if (human_readable)
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{
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auto reserved_string = TRY(to_dynamic_unit(buf.mem_reserved, 10, false, Unit::Binary, true));
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os::println("%s reserved", reserved_string.chars());
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}
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else { os::println("%lu reserved", buf.mem_reserved); }
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}
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return 0;
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}
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