7a395e2e7f
The last good commit wasf57e4c5b98. After this one more fix was committed, this one is preserved as well:67bd678887.
76 lines
2.0 KiB
C
76 lines
2.0 KiB
C
/* SPDX-FileCopyrightText: 2023 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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#include "BLI_tempfile.h"
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#include "BLI_fileops.h"
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#include "BLI_path_util.h"
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#include "BLI_string.h"
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bool BLI_temp_directory_path_copy_if_valid(char *temp_directory,
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const size_t buffer_size,
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const char *dirpath)
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{
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if (dirpath == NULL) {
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return false;
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}
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/* Disallow paths starting with two forward slashes. While they are valid paths,
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* Blender interprets them as relative in situations relative paths aren't supported,
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* see #95411. */
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while (UNLIKELY(dirpath[0] == '/' && dirpath[1] == '/')) {
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dirpath++;
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}
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if (dirpath[0] == '\0') {
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return false;
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}
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if (!BLI_is_dir(dirpath)) {
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return false;
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}
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BLI_strncpy(temp_directory, dirpath, buffer_size);
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/* Add a trailing slash if needed. */
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BLI_path_slash_ensure(temp_directory, buffer_size);
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/* There's nothing preventing an environment variable (even preferences) from being CWD relative.
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* This causes:
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* - Asserts in code-paths which expect absolute paths (blend-file IO).
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* - The temporary directory to change if the CWD changes.
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* Avoid issues by ensuring the temporary directory is *never* CWD relative. */
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BLI_path_abs_from_cwd(temp_directory, buffer_size);
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return true;
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}
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void BLI_temp_directory_path_get(char *temp_directory, const size_t buffer_size)
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{
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temp_directory[0] = '\0';
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const char *env_vars[] = {
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#ifdef WIN32
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"TEMP",
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#else
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/* Non standard (could be removed). */
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"TMP",
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/* Posix standard. */
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"TMPDIR",
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#endif
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};
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for (int i = 0; i < ARRAY_SIZE(env_vars); i++) {
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if (BLI_temp_directory_path_copy_if_valid(
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temp_directory, buffer_size, BLI_getenv(env_vars[i])))
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{
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break;
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}
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}
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if (temp_directory[0] == '\0') {
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BLI_strncpy(temp_directory, "/tmp/", buffer_size);
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}
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BLI_dir_create_recursive(temp_directory);
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}
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