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85 lines
2.7 KiB
85 lines
2.7 KiB
/* |
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* Copyright (C) 2012 The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#ifndef __CUTILS_FS_H |
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#define __CUTILS_FS_H |
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#include <sys/types.h> |
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#include <unistd.h> |
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/* |
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* TEMP_FAILURE_RETRY is defined by some, but not all, versions of |
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* <unistd.h>. (Alas, it is not as standard as we'd hoped!) So, if it's |
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* not already defined, then define it here. |
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*/ |
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#ifndef TEMP_FAILURE_RETRY |
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/* Used to retry syscalls that can return EINTR. */ |
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#define TEMP_FAILURE_RETRY(exp) ({ \ |
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typeof (exp) _rc; \ |
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do { \ |
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_rc = (exp); \ |
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} while (_rc == -1 && errno == EINTR); \ |
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_rc; }) |
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#endif |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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/* |
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* Ensure that directory exists with given mode and owners. If it exists |
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* with a different mode or owners, they are fixed to match the given values. |
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*/ |
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extern int fs_prepare_dir(const char* path, mode_t mode, uid_t uid, gid_t gid); |
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/* |
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* Ensure that directory exists with given mode and owners. If it exists |
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* with different owners, they are not fixed and -1 is returned. |
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*/ |
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extern int fs_prepare_dir_strict(const char* path, mode_t mode, uid_t uid, gid_t gid); |
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/* |
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* Ensure that file exists with given mode and owners. If it exists |
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* with different owners, they are not fixed and -1 is returned. |
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*/ |
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extern int fs_prepare_file_strict(const char* path, mode_t mode, uid_t uid, gid_t gid); |
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/* |
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* Read single plaintext integer from given file, correctly handling files |
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* partially written with fs_write_atomic_int(). |
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*/ |
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extern int fs_read_atomic_int(const char* path, int* value); |
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/* |
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* Write single plaintext integer to given file, creating backup while |
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* in progress. |
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*/ |
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extern int fs_write_atomic_int(const char* path, int value); |
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/* |
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* Ensure that all directories along given path exist, creating parent |
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* directories as needed. Validates that given path is absolute and that |
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* it contains no relative "." or ".." paths or symlinks. Last path segment |
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* is treated as filename and ignored, unless the path ends with "/". |
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*/ |
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extern int fs_mkdirs(const char* path, mode_t mode); |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* __CUTILS_FS_H */
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