46 lines
1.1 KiB
C++
46 lines
1.1 KiB
C++
#include <os/ArgumentParser.h>
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#include <os/File.h>
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#include <os/Process.h>
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#include <stdio.h>
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#include <sys/resource.h>
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#include <sys/wait.h>
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Result<int> luna_main(int argc, char** argv)
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{
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Vector<StringView> command;
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os::ArgumentParser parser;
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parser.add_description("Time a command.");
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parser.add_system_program_info("time"_sv);
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parser.set_vector_argument(command, true);
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TRY(parser.parse(argc, argv));
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auto pid = TRY(os::Process::fork());
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if (pid == 0)
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{
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TRY(os::Process::exec(command[0], command.slice()));
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unreachable();
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}
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if (waitpid(pid, nullptr, 0) < 0)
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{
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perror("waitpid");
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return 1;
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}
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struct rusage usage;
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if (getrusage(RUSAGE_CHILDREN, &usage) < 0)
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{
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perror("getrusage");
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return 1;
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}
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auto cmdline = TRY(String::join(command, " "));
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os::println("%s %d.%.2ds user %d.%.2ds system"_sv, cmdline.chars(), usage.ru_utime.tv_sec,
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usage.ru_utime.tv_usec / 10000, usage.ru_stime.tv_sec, usage.ru_stime.tv_usec / 10000);
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return 0;
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}
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