mirror of
https://git.proxmox.com/git/libgit2
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140 lines
2.3 KiB
C
140 lines
2.3 KiB
C
static char _clar_path[4096];
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static int
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is_valid_tmp_path(const char *path)
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{
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STAT_T st;
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if (stat(path, &st) != 0)
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return 0;
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if (!S_ISDIR(st.st_mode))
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return 0;
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return (access(path, W_OK) == 0);
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}
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static int
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find_tmp_path(char *buffer, size_t length)
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{
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#ifndef _WIN32
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static const size_t var_count = 5;
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static const char *env_vars[] = {
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"CLAR_TMP", "TMPDIR", "TMP", "TEMP", "USERPROFILE"
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};
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size_t i;
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for (i = 0; i < var_count; ++i) {
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const char *env = getenv(env_vars[i]);
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if (!env)
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continue;
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if (is_valid_tmp_path(env)) {
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strncpy(buffer, env, length);
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return 0;
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}
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}
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/* If the environment doesn't say anything, try to use /tmp */
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if (is_valid_tmp_path("/tmp")) {
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strncpy(buffer, "/tmp", length);
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return 0;
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}
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#else
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DWORD env_len = GetEnvironmentVariable("CLAR_TMP", buffer, (DWORD)length);
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if (env_len > 0 && env_len < (DWORD)length)
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return 0;
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if (GetTempPath((DWORD)length, buffer))
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return 0;
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#endif
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/* This system doesn't like us, try to use the current directory */
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if (is_valid_tmp_path(".")) {
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strncpy(buffer, ".", length);
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return 0;
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}
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return -1;
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}
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static void clar_unsandbox(void)
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{
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if (_clar_path[0] == '\0')
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return;
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chdir("..");
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fs_rm(_clar_path);
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}
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static int build_sandbox_path(void)
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{
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#ifdef CLAR_TMPDIR
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const char path_tail[] = CLAR_TMPDIR "_XXXXXX";
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#else
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const char path_tail[] = "clar_tmp_XXXXXX";
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#endif
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size_t len;
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if (find_tmp_path(_clar_path, sizeof(_clar_path)) < 0)
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return -1;
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len = strlen(_clar_path);
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#ifdef _WIN32
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{ /* normalize path to POSIX forward slashes */
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size_t i;
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for (i = 0; i < len; ++i) {
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if (_clar_path[i] == '\\')
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_clar_path[i] = '/';
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}
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}
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#endif
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if (_clar_path[len - 1] != '/') {
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_clar_path[len++] = '/';
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}
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strncpy(_clar_path + len, path_tail, sizeof(_clar_path) - len);
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#if defined(__MINGW32__)
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if (_mktemp(_clar_path) == NULL)
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return -1;
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if (mkdir(_clar_path, 0700) != 0)
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return -1;
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#elif defined(_WIN32)
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if (_mktemp_s(_clar_path, sizeof(_clar_path)) != 0)
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return -1;
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if (mkdir(_clar_path, 0700) != 0)
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return -1;
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#else
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if (mkdtemp(_clar_path) == NULL)
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return -1;
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#endif
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return 0;
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}
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static int clar_sandbox(void)
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{
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if (_clar_path[0] == '\0' && build_sandbox_path() < 0)
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return -1;
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if (chdir(_clar_path) != 0)
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return -1;
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return 0;
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}
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const char *clar_sandbox_path(void)
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{
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return _clar_path;
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}
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