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Shell: Add a "time" builtin to show how long a command took to run

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This commit is contained in:
Andreas Kling 2019-09-16 19:46:34 +02:00
parent f2b6e1b577
commit 3596522d23
1 changed files with 25 additions and 0 deletions
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25
Shell/main.cpp
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@ -25,6 +25,8 @@
GlobalState g;
static LineEditor editor;
static int run_command(const String&);
static String prompt()
{
if (g.uid == 0)
@ -133,6 +135,25 @@ static int sh_history(int, char**)
return 0;
}
static int sh_time(int argc, char** argv)
{
if (argc == 1) {
printf("usage: time <command>\n");
return 0;
}
StringBuilder builder;
for (int i = 1; i < argc; ++i) {
builder.append(argv[i]);
if (i != argc - 1)
builder.append(' ');
}
CElapsedTimer timer;
timer.start();
int exit_code = run_command(builder.to_string());
printf("Time: %d ms\n", timer.elapsed());
return exit_code;
}
static int sh_umask(int argc, char** argv)
{
if (argc == 1) {
@ -392,6 +413,10 @@ static bool handle_builtin(int argc, char** argv, int& retval)
retval = sh_popd(argc, argv);
return true;
}
if (!strcmp(argv[0], "time")) {
retval = sh_time(argc, argv);
return true;
}
return false;
}