mirror of
https://github.com/jart/cosmopolitan.git
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85 lines
3.4 KiB
C
85 lines
3.4 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net 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/calls/calls.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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/**
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* RII constant holding temporary file 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. We also
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* ensure `kTmpPath` isn't longer than `PATH_MAX-NAME_MAX`.
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*/
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char kTmpPath[PATH_MAX];
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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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__attribute__((__constructor__)) static void kTmpPathInit(void) {
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int i;
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char *s;
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uint32_t n;
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char16_t path16[PATH_MAX];
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if ((s = getenv("TMPDIR"))) {
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if (*s != '/') {
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if (!getcwd(kTmpPath, PATH_MAX)) {
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goto GiveUp;
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}
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strlcat(kTmpPath, "/", sizeof(kTmpPath));
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}
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strlcat(kTmpPath, s, sizeof(kTmpPath));
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if (strlcat(kTmpPath, "/", sizeof(kTmpPath)) < 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(path16), path16)) && n < ARRAYLEN(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 (path16[i] == '\\') {
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path16[i] = '/';
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}
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}
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// turn c:/... into /c/...
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if (IsAlpha(path16[0]) && path16[1] == ':' && path16[2] == '/') {
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path16[1] = path16[0];
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path16[0] = '/';
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path16[2] = '/';
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}
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tprecode16to8(kTmpPath, sizeof(kTmpPath), path16);
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return;
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}
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strcpy(kTmpPath, "/tmp/");
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}
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