44d6342caa
Before this change, FUSE lookup() would have the side effect of creating the directory on behalf of apps. This resulted in most directories being created just by Settings trying to measure disk space. Instead, we're switching to have vold do directory creation when an app doesn't have enough permissions. Create fs_mkdirs() utility to create all parent directories in a path as needed. Allow traversal (+x) into /storage directories. Fix FUSE derived permissions to be case insensitive. Mark well-known directories as .nomedia when created. Bug: 10577808, 10330221 Change-Id: I53114f2e63ffbe6de4ba6a72d94a232523231cad
70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
/*
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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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/*
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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.
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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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* 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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