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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