1 /*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "init_file.h"
17
18 #include <errno.h>
19 #include <fcntl.h>
20 #include <limits.h>
21 #include <stdlib.h>
22
23 #include "beget_ext.h"
24 #include "init_utils.h"
25 #include "securec.h"
26
27 #define N_DEC 10
28
GetControlFile(const char * pathName)29 int GetControlFile(const char *pathName)
30 {
31 if (pathName == NULL) {
32 return -1;
33 }
34 char path[PATH_MAX] = { 0 };
35 BEGET_ERROR_CHECK(snprintf_s(path, sizeof(path), sizeof(path) - 1, OHOS_FILE_ENV_PREFIX "%s", pathName) >= 0,
36 return -1, "Failed snprintf_s err=%d", errno);
37 BEGET_ERROR_CHECK(StringReplaceChr(path, '/', '_') == 0,
38 return -1, "Failed string replace char");
39 BEGET_LOGI("Environment path is %s ", path);
40 const char *val = getenv(path);
41 BEGET_ERROR_CHECK(val != NULL, return -1, "Failed getenv err=%d", errno);
42 errno = 0;
43 int fd = strtol(val, NULL, N_DEC);
44 BEGET_ERROR_CHECK(errno == 0, return -1, "Failed strtol val");
45 BEGET_LOGI("Get environment fd is %d ", fd);
46 BEGET_ERROR_CHECK(fcntl(fd, F_GETFD) >= 0, return -1, "Failed fcntl fd err=%d ", errno);
47 return fd;
48 }
49