1 /*
2 *
3 * Copyright 2015 gRPC authors.
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 */
18
19 #include <grpc/support/port_platform.h>
20
21 #ifdef GPR_WINDOWS_TMPFILE
22
23 #include <io.h>
24 #include <stdio.h>
25 #include <string.h>
26 #include <tchar.h>
27
28 #include <grpc/support/alloc.h>
29 #include <grpc/support/log.h>
30 #include <grpc/support/string_util.h>
31
32 #include "src/core/lib/gpr/string_windows.h"
33 #include "src/core/lib/gpr/tmpfile.h"
34
gpr_tmpfile(const char * prefix,char ** tmp_filename_out)35 FILE* gpr_tmpfile(const char* prefix, char** tmp_filename_out) {
36 FILE* result = NULL;
37 LPTSTR template_string = NULL;
38 TCHAR tmp_path[MAX_PATH];
39 TCHAR tmp_filename[MAX_PATH];
40 DWORD status;
41 UINT success;
42
43 if (tmp_filename_out != NULL) *tmp_filename_out = NULL;
44
45 /* Convert our prefix to TCHAR. */
46 template_string = gpr_char_to_tchar(prefix);
47 GPR_ASSERT(template_string);
48
49 /* Get the path to the best temporary folder available. */
50 status = GetTempPath(MAX_PATH, tmp_path);
51 if (status == 0 || status > MAX_PATH) goto end;
52
53 /* Generate a unique filename with our template + temporary path. */
54 success = GetTempFileName(tmp_path, template_string, 0, tmp_filename);
55 if (!success) goto end;
56
57 /* Open a file there. */
58 if (_tfopen_s(&result, tmp_filename, TEXT("wb+")) != 0) goto end;
59
60 end:
61 if (result && tmp_filename_out) {
62 *tmp_filename_out = gpr_tchar_to_char(tmp_filename);
63 }
64
65 gpr_free(template_string);
66 return result;
67 }
68
69 #endif /* GPR_WINDOWS_TMPFILE */
70