mirror of
https://github.com/jart/cosmopolitan.git
synced 2024-05-08 06:32:40 +00:00
b407327972
- clock_nanosleep() is now much faster on OpenBSD and NetBSD - Thread joining is now much faster on NetBSD - FreeBSD timestamps are now more accurate - Thread spawning now goes faster on XNU - Clean up the clone() code
62 lines
1.8 KiB
C
62 lines
1.8 KiB
C
#if 0
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/*─────────────────────────────────────────────────────────────────╗
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│ To the extent possible under law, Justine Tunney has waived │
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│ all copyright and related or neighboring rights to this file, │
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│ as it is written in the following disclaimers: │
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│ • http://unlicense.org/ │
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│ • http://creativecommons.org/publicdomain/zero/1.0/ │
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╚─────────────────────────────────────────────────────────────────*/
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#endif
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#include "libc/calls/calls.h"
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#include "libc/runtime/runtime.h"
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#include "libc/stdio/stdio.h"
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#include "libc/str/str.h"
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#include "libc/time/time.h"
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#include "libc/x/x.h"
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/**
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* 16kb sleep executable that runs on all operating systems.
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* https://justine.lol/cosmopolitan/demos/sleep.c
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* https://justine.lol/cosmopolitan/demos/sleep.com
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* https://justine.lol/cosmopolitan/index.html
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*/
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#define WRITE(s) write(2, s, strlen(s))
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int main(int argc, char *argv[]) {
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char *p;
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long double x, y;
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if (argc != 2) {
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WRITE("Usage: ");
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WRITE(argv[0]);
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WRITE(" SECONDS\n");
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exit(1);
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}
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x = 0;
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for (p = argv[1]; isdigit(*p); ++p) {
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x *= 10;
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x += *p - '0';
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}
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if (*p == '.') {
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y = 1;
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for (++p; isdigit(*p); ++p) {
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x += (*p - '0') * (y /= 10);
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}
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}
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switch (*p) {
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case 'm':
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x *= 60;
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break;
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case 'h':
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x *= 60 * 60;
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break;
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case 'd':
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x *= 60 * 60 * 24;
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break;
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default:
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break;
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}
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dsleep(x);
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return 0;
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}
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