mirror of
https://github.com/jart/cosmopolitan.git
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63 lines
2.7 KiB
C
63 lines
2.7 KiB
C
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2023 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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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 "third_party/getopt/getopt.internal.h"
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/**
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* @fileoverview `verynice foo` launches `foo` as low priority as possible
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*
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* This is particularly useful on Linux systems with a spinning disk
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* where the classic `nice` command doesn't do much.
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*/
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const char *prog;
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static wontreturn void PrintUsage(int rc, int fd) {
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tinyprint(fd, "Usage: ", prog, " COMMAND...\n", NULL);
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exit(rc);
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}
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int main(int argc, char *argv[]) {
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prog = argv[0];
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if (!prog)
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prog = "verynice";
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int opt;
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while ((opt = getopt(argc, argv, "h")) != -1) {
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switch (opt) {
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case 'h':
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PrintUsage(0, 1);
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default:
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PrintUsage(1, 2);
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}
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}
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if (optind == argc) {
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tinyprint(2, prog, ": missing command\n", NULL);
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exit(1);
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}
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verynice();
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execvp(argv[optind], argv + optind);
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perror(argv[optind]);
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exit(127);
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}
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