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https://github.com/jart/cosmopolitan.git
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e16a7d8f3b
`et` means `expandtab`. ```sh rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\) et\(.*\) :vi/vi: \1 xoet\2:vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)noet\(.*\):vi/vi: \1et\2 :vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)xoet\(.*\):vi/vi: \1noet\2:vi/' ```
102 lines
3.9 KiB
C
102 lines
3.9 KiB
C
/*-*- 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 2022 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/atomic.h"
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#include "libc/calls/calls.h"
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#include "libc/cosmo.h"
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#include "libc/dce.h"
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#include "libc/limits.h"
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#include "libc/macros.internal.h"
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#include "libc/nt/systeminfo.h"
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#include "libc/runtime/runtime.h"
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#include "libc/str/str.h"
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static struct {
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atomic_uint once;
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union {
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char path[PATH_MAX];
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char16_t path16[PATH_MAX / 2];
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};
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} __tmpdir;
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static inline int IsAlpha(int c) {
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return ('A' <= c && c <= 'Z') || ('a' <= c && c <= 'z');
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}
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static void __tmpdir_init(void) {
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int i;
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char *s;
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uint32_t n;
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if ((s = getenv("TMPDIR"))) {
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if (*s != '/') {
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if (__getcwd(__tmpdir.path, PATH_MAX) == -1) {
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goto GiveUp;
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}
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strlcat(__tmpdir.path, "/", sizeof(__tmpdir.path));
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}
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strlcat(__tmpdir.path, s, sizeof(__tmpdir.path));
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if (strlcat(__tmpdir.path, "/", sizeof(__tmpdir.path)) <
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PATH_MAX - NAME_MAX) {
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return;
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}
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}
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GiveUp:
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if (IsWindows() &&
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((n = GetTempPath(ARRAYLEN(__tmpdir.path16), __tmpdir.path16)) &&
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n < ARRAYLEN(__tmpdir.path16))) {
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// turn c:\foo\bar\ into c:/foo/bar/
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for (i = 0; i < n; ++i) {
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if (__tmpdir.path16[i] == '\\') {
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__tmpdir.path16[i] = '/';
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}
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}
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// turn c:/... into /c/...
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if (IsAlpha(__tmpdir.path16[0]) && __tmpdir.path16[1] == ':' &&
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__tmpdir.path16[2] == '/') {
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__tmpdir.path16[1] = __tmpdir.path16[0];
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__tmpdir.path16[0] = '/';
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__tmpdir.path16[2] = '/';
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}
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tprecode16to8(__tmpdir.path, sizeof(__tmpdir.path), __tmpdir.path16);
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return;
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}
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strcpy(__tmpdir.path, "/tmp/");
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}
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/**
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* Returns pretty good temporary directory.
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*
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* The order of precedence is:
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*
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* - $TMPDIR/ is always favored if defined
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* - GetTempPath(), for the New Technology
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* - /tmp/ to make security scene go crazy
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*
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* This guarantees an absolute path with a trailing slash. The returned
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* value points to static memory with `PATH_MAX` bytes. The string will
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* be short enough that at least `NAME_MAX` bytes remain. This function
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* is thread safe so long as callers don't modified the returned memory
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*/
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char *__get_tmpdir(void) {
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cosmo_once(&__tmpdir.once, __tmpdir_init);
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return __tmpdir.path;
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}
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