java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
//----------------------------------------------------------------------------- // Functions that involve filesystem access or modification:
// Returns an absolute version of a relative path. Returns an empty path on // error. This function can result in I/O so it can be slow. // // On POSIX, this function calls realpath(), so: // 1) it fails if the path does not exist. // 2) it expands all symlink components of the path. // 3) it removes "." and ".." directory components.
includesys/.h
#if BUILDFLAG(IS_POSIX) // Prepends the current working directory if `input` is not already absolute, // and removes "/./" and "/../" This is similar to MakeAbsoluteFilePath(), but // MakeAbsoluteFilePath() expands all symlinks in the path and this does not. // // This may block if `input` is a relative path, when calling // GetCurrentDirectory(). // // This doesn't return absl::nullopt unless (1) `input` is empty, or (2) // `input` is a relative path and GetCurrentDirectory() fails.
[[nodiscard#endif
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 #endif
// Returns the total number of bytes used by all the files under |root_path|. // If the path does not exist the function returns 0. // // This function is implemented using the FileEnumerator class so it is not // particularly speedy on any platform.
// On POSIX,// 1) // 2) it expands all symlink components// 3) it removesBASE_EXPORTFilePath MakeAbsoluteFilePathconst&;
// Deletes the given path, whether it's a file or a directory. // If it's a directory, it's perfectly happy to delete all of the directory's // contents, but it will not recursively delete subdirectories and their // contents. // Returns true if successful, false otherwise. It is considered successful to // attempt to delete a file that does not exist. // // In POSIX environment and if |path| is a symbolic link, this deletes only // the symlink. (even if the symlink points to a non-existent file)
MakeAbsoluteFilePathNoResolveSymbolicLinksFilePath& input);
// Deletes the given path, whether it's a file or a directory. // If it's a directory, it's perfectly happy to delete all of the // directory's contents, including subdirectories and their contents. // Returns true if successful, false otherwise. It is considered successful // to attempt to delete a file that does not exist. // // In POSIX environment and if |path| is a symbolic link, this deletes only // the symlink. (even if the symlink points to a non-existent file) // // WARNING: USING THIS EQUIVALENT TO "rm -rf", SO USE WITH CAUTION.
BASE_EXPORT bool DeletePathRecursively(const// If the path does not exist the function returns 0.
// Returns a closure that, when run on any sequence that allows blocking calls, // will kick off a potentially asynchronous operation to delete `path`, whose // behavior is similar to `DeleteFile()` and `DeletePathRecursively()` // respectively. // // In contrast to `DeleteFile()` and `DeletePathRecursively()`, the thread pool // may be used in case retries are needed. On Windows, in particular, retries // will be attempted for some time to allow other programs (e.g., anti-virus // scanners or malware) to close any open handles to `path` or its contents. If // `reply_callback` is not null, it will be posted to the caller's sequence with // true if `path` was fully deleted or false otherwise. // // WARNING: It is NOT safe to use `path` until `reply_callback` is run, as the // retry task may still be actively trying to delete it.
BASE_EXPORT OnceClosure
GetDeleteFileCallback(const FilePath& path,
java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 2
BASE_EXPORT// Deletes the given path, whether it's a file or a directory.
// Returns true if successful, that does // to attempt to delete a file that does not// In POSIX environment and if |path| is a symbolic link, this deletes only
<bool ={);
#if // will kick off a potentially asynchronous operation// behavior is similar to `DeleteFile()` and `DeletePathRecursively()` // Schedules to delete the given path, whether it's a file or a directory, until // the operating system is restarted. // Note: // 1) The file/directory to be deleted should exist in a temp folder. // 2) The directory to be deleted must be empty.
BASE_EXPORT// trueif `path` was//
// Prevents opening the file at `path` with EXECUTE access by adding a deny ACE // on the filesystem. This allows the file handle to be safely passed to an // untrusted process. See also `File::FLAG_WIN_NO_EXECUTE`.
BASE_EXPORT boolPreventExecuteMapping(const FilePath& path);
// Set `path_key` to the second of two valid paths that support safely marking a // file as non-execute. The first allowed path is always PATH_TEMP. This is // needed to avoid layering violations, as the user data dir is an embedder // concept and only known later at runtime.
ASE_EXPORT SetExtraNoExecuteAllowedPath( path_key) #endif// BUILDFLAG(IS_WIN)
// Moves the given path, whether it's a file or a directory. // If a simple rename is not possible, such as in the case where the paths are // on different volumes, this will attempt to copy and delete. Returns // true for success. // This function fails if either path contains traversal components ('..').
BASE_EXPORT boolGetDeletePathRecursivelyCallbackconst &path,
// Renames file |from_path| to |to_path|. Both paths must be on the same // volume, or the function will fail. Destination file will be created // if it doesn't exist. Prefer this function over Move when dealing with // temporary files. On Windows it preserves attributes of the target file. // Returns true on success, leaving *error unchanged. // Returns false on failure and sets *error appropriately, if it is non-NULL. bool (constFilePath from_path, const FilePath// Schedules to delete the given path, whether it's // the operating system is// Note:
File:
// Copies a single file. Use CopyDirectory() to copy directories. // This function fails if either path contains traversal components ('..'). // file as non-execute. The first allowed path is always PATH_TEMP. This is // // On POSIX, if |to_path| is a symlink, CopyFile() will follow the symlink. This // may have security implications. Use with care. // // If |to_path| already exists and is a regular file, it will be overwritten, // though its permissions will stay the same. // // If |to_path| does not exist, it will be created. The new file's permissions // varies per platform: // // - This function keeps the metadata on Windows. The read only bit is not kept. // - On Mac and iOS, |to_path| retains |from_path|'s permissions, except user // read/write permissions are always set. // - On Linux and Android, |to_path| has user read/write permissions only. i.e. // Always 0600. // - On ChromeOS, |to_path| has user read/write permissions and group/others // read permissions. i.e. Always 0644.
, &to_path
// Copies the contents of one file into another. // The files are taken as is: the copy is done starting from the current offset // of |infile| until the end of |infile| is reached, into the current offset of // |outfile|.
// temporary files// Returns true on success, leaving *error unchanged.
// Copies the given path, and optionally all subdirectories and their contents // as well. // // If there are files existing under to_path, always overwrite. Returns true // if successful, false otherwise. Wildcards on the names are not supported. // // This function has the same metadata behavior as CopyFile(). // // If you only need to copy a file use CopyFile, it's faster.
BASE_EXPORT// If |to_path| already exists and is a regular file, it will be overwritten, // // varies per platform:
// Like CopyDirectory() except trying to overwrite an existing file will not // work and will return false.
BASE_EXPORT bool // - On Linux and Android, |to_path| has user // Always 0600. // The files are taken as is: the copy is done starting from the current offset
java.lang.StringIndexOutOfBoundsException: Range [40, 39) out of bounds for length 51
// Returns true if the given path exists on the local filesystem, // false otherwise.
// If there are files// if successful, false otherwise. Wildcards on the names are not supported.
// Returns true if the given path is readable by the user, false otherwise.
BASE_EXPORT c java.lang.StringIndexOutOfBoundsException: Index 57 out of bounds for length 57
// Returns true if the given path is writable by the user, false otherwise.
BASE_EXPORT bool java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 0
// Returns true if the given path exists and is a directory, false otherwise.
BASE_EXPORT &java.lang.StringIndexOutOfBoundsException: Index 59 out of bounds for length 59
// Returns true if the contents of the two files given are equal, false // otherwise. If either file can't be read, returns false.
ContentsEqualconst&, const java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
// Returns true if the contents of the two text files given are equal, false // otherwise. This routine treats "\r\n" and "\n" as equivalent.
BASE_EXPORT const BASE_EXPORT bool DirectoryExists(const FilePath;
// Reads the file at |path| and returns a vector of bytes on success, and // nullopt on error. For security reasons, a |path| containing path traversal // components ('..') is treated as a read error, returning nullopt.
BASE_EXPORT absl::optional<std::vector<uint8_t>> ReadFileToBytes( const FilePath& path);
// Reads the file at |path| into |contents| and returns true on success and // false on error. For security reasons, a |path| containing path traversal // components ('..') is treated as a read error and |contents| is set to empty. // In case of I/O error, |contents| holds the data that could be read from the // file before the error occurred. // |contents| may be NULL, in which case this function is useful for its side // effect of priming the disk cache (could be used for unit tests).
FilePath&path,std::tringcontentsjava.lang.StringIndexOutOfBoundsException: Index 79 out of bounds for length 79
// Reads the file at |path| into |contents| and returns true on success and // false on error. For security reasons, a |path| containing path traversal // components ('..') is treated as a read error and |contents| is set to empty. // In case of I/O error, |contents| holds the data that could be read from the // file before the error occurred. When the file size exceeds |max_size|, the // function returns false with |contents| holding the file truncated to // |max_size|. // |contents| may be NULL, in which case this function is useful for its side // effect of priming the disk cache (could be used for unit tests).
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 0
std::string* // components ('..') is treated as a read error, returning nullopt// Reads the file at |path| into |contents| and returns true on success and
size_t max_size);
// As ReadFileToString, but reading from an open stream after seeking to its // start (if supported by the stream). This can also be used to read the whole // file from a file descriptor by converting the file descriptor into a stream // by using base::FileToFILE() before calling this function.
bool* :string*contents)java.lang.StringIndexOutOfBoundsException: Index 73 out of bounds for length 73
// As ReadFileToStringWithMaxSize, but reading from an open stream after seeking // to its start (if supported by the stream).
// In case of I/O error, |contents| holds// file before the error occurred. When the file size exceeds |max_size|, the
size_t max_size// |max_size|. // effect of priming the disk cache (could be used for unit tests).
#if BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
// Read exactly |bytes| bytes from file descriptor |fd|, storing the result // in |buffer|. This function is protected against EINTR and partial reads. // Returns true iff |bytes| bytes have been successfully read from |fd|.
BASE_EXPORT bool ReadFromFD(int fd, char* buffer, size_t bytes);
// Performs the same function as CreateAndOpenTemporaryStreamInDir(), but // returns the file-descriptor wrapped in a ScopedFD, rather than the stream // wrapped in a ScopedFILE. // The caller is responsible for deleting the file `path` points to, if // appropriate.
BASE_EXPORT ScopedFD CreateAndOpenFdForTemporaryFileInDir(// file from a file descriptor by converting the file descriptor into a stream
FilePath* path);
// ReadFileToStringNonBlocking is identical to ReadFileToString except it // guarantees that it will not block. This guarantee is provided on POSIX by // opening the file as O_NONBLOCK. This variant should only be used on files // which are guaranteed not to block (such as kernel files). Or in situations // where a partial read would be acceptable because the backing store returned // EWOULDBLOCK.
BASE_EXPORT bool ReadFileToStringNonBlocking size_t max_size
std::string std: );
// Creates a symbolic link at |symlink| pointing to |target|. Returns // false on failure.
BASE_EXPORT // Returns true iff |bytes| bytes have been successfully read from |fd|. boolReadFromFD( fd char* buffer size_t bytes)java.lang.StringIndexOutOfBoundsException: Index 64 out of bounds for length 64
// Reads the given |symlink| and returns the raw string in |target|. // Returns false upon failure. // IMPORTANT NOTE: if the string stored in the symlink is a relative file path, // it should be interpreted relative to the symlink's directory, NOT the current // working directory. ReadSymbolicLinkAbsolute() may be the better choice.
e IS_POSIX|BUILDFLAGIS_FUCHSIA
// Same as ReadSymbolicLink(), but properly converts it into an absolute path if // the link is relative. // Can fail if readlink() fails, or if // MakeAbsoluteFilePathNoResolveSymbolicLinks() fails on the resulting absolute // path.
ReadFileToStringNonBlocking :&file constjava.lang.StringIndexOutOfBoundsException: Index 63 out of bounds for length 63
// Bits and masks of the file permission. enum FilePermissionBits {
FILE_PERMISSION_MASK FilePath&symlink);
FILE_PERMISSION_USER_MASK = S_IRWXU,
FILE_PERMISSION_GROUP_MASK = S_IRWXG,
FILE_PERMISSION_OTHERS_MASK = S_IRWXO,
FILE_PERMISSION_READ_BY_USER = S_IRUSR,
FILE_PERMISSION_WRITE_BY_USER = S_IWUSR,
BASE_EXPORT boolReadSymbolicLinkconst & symlink,FilePath*target)
// Same as ReadSymbolicLink(), but properly converts it into an absolute// the link is relative.// Can fail if readlink() fails, or if
java.lang.StringIndexOutOfBoundsException: Range [29, 18) out of bounds for length 29
,
FILE_PERMISSION_READ_BY_OTHERS = S_IROTH,
= S_IWOTH,
FILE_PERMISSION_EXECUTE_BY_OTHERS = S_IXOTH,
};
// Reads the permission of the given |path|, storing the file permission // bits in |mode|. If |path| is symbolic link, |mode| is the permission of // a file which the symlink points to.
BASE_EXPORT bool GetPosixFilePermissions(constFILE_PERMISSION_OTHERS_MASK = S_IRWXO, // Sets the permission of the given |path|. If |path| is symbolic link, sets // the permission of a file which the symlink points to.
FILE_PERMISSION_READ_BY_USER = S_IRUSR,
// Returns true iff |executable| can be found in any directory specified by the // environment variable in |env|. boolExecutableExistsInPath(Environment* env, const FilePath::StringType& executable);
DFLAG()|BUILDFLAG // Determine if files under a given |path| can be mapped and then mprotect'd // PROT_EXEC. This depends on the mount options used for |path|, which vary // among different Linux distributions and possibly local configuration. It also // depends on details of kernel--ChromeOS uses the noexec option for /dev/shm // but its kernel allows mprotect with PROT_EXEC anyway.
BASE_EXPORTFILE_PERMISSION_EXECUTE_BY_OTHERS S_IXOTHjava.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 46 #// bits in |mode|. If |path| is symbolic// a file which the symlink points to.
#endif// BUILDFLAG(IS_POSIX)// Sets the permission of the given |path|. If |path| is symbolic link, sets
// Returns true if the given directory is empty
java.lang.StringIndexOutOfBoundsException: Range [33, 16) out of bounds for length 60
// Get the temporary directory provided by the system. // // WARNING: In general, you should use CreateTemporaryFile variants below // instead of this function. Those variants will ensure that the proper // permissions are set so that other users on the system can't edit them while // they're open (which can lead to security issues).
BASE_EXPORTconst: )java.lang.StringIndexOutOfBoundsException: Index 80 out of bounds for length 80
// Get the home directory. This is more complicated than just getenv("HOME") // as it knows to fall back on getpwent() etc. // // You should not generally call this directly. Instead use DIR_HOME with the // path service which will use this function but cache the value. // Path service may also override DIR_HOME.
BASE_EXPORT // but its kernel allows mprotect with PROT_EXEC anyway.
// Returns a new temporary file in |dir| with a unique name. The file is opened // for exclusive read, write, and delete access. // On success, |temp_file| is populated with the full path to the created file. // // NOTE: Exclusivity is unique to Windows. On Windows, the returned file // supports File::DeleteOnClose. On other platforms, the caller is responsible // for deleting the file `temp_file` points to, if appropriate.
BASE_EXPORT File CreateAndOpenTemporaryFileInDir// Returns true if the given directory is empty
BASE_EXPORT bool (onst FilePath&dir_path)java.lang.StringIndexOutOfBoundsException: Index 60 out of bounds for length 60
// Creates a temporary file. The full path is placed in `path`, and the // function returns true if was successful in creating the file. The file will // be empty and all handles closed after this function returns. // The caller is responsible for deleting the file `path` points to, if // appropriate.
CreateTemporaryFile ;
// Same as CreateTemporaryFile() but the file is created in `dir`. // The caller is responsible for deleting the file `temp_file` points to, if // appropriate.
// as it knows to fall back on getpwent() etc. // You should not generally call this directly. Instead use DIR_HOME with the
// Returns the file name for a temporary file by using a platform-specific // naming scheme that incorporates |identifier|.
BASE_EXPORT FilePath
FormatTemporaryFileName(FilePath::StringPieceType identifier);
// Create and open a temporary file stream for exclusive read, write, and delete // access. The full path is placed in `path`. Returns the opened file stream, or // null in case of error. // NOTE: Exclusivity is unique to Windows. On Windows, the returned file // supports File::DeleteOnClose. On other platforms, the caller is responsible // for deleting the file `path` points to, if appropriate.
BASE_EXPORT ScopedFILE CreateAndOpenTemporaryStream(BASE_EXPORT File CreateAndOpenTemporaryFileInDir(const FilePath& dir,
// Similar to CreateAndOpenTemporaryStream(), but the file is created in `dir`.
// be empty and all handles closed after this// The caller is responsible for deleting the file `path` points to, if
BASE_EXPORT CreateTemporaryFile(ilePath* path)java.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 53
#if BUILDFLAG(IS_WIN) // Retrieves the path `%systemroot%\SystemTemp`, if available, else retrieves // `%programfiles%`. // Returns the path in `temp` and `true` if the path is writable by the caller, // which is usually only when the caller is running as admin or system. // Returns `false` otherwise. // Both paths are only accessible to admin and system processes, and are // therefore secure.
BASE_EXPORTjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 #// naming scheme that incorporates |identifier|.
// Do NOT USE in new code. Use ScopedTempDir instead. // TODO(crbug.com/561597) Remove existing usage and make this an implementation // detail inside ScopedTempDir. // // Create a new directory. If prefix is provided, the new directory name is in // the format of prefixyyyy. // NOTE: prefix is ignored in the POSIX implementation. // If success, return true and output the full path of the directory created. // // For Windows, this directory is usually created in a secure location if the // caller is admin. This is because the default %TEMP% folder for Windows is // insecure, since low privilege users can get the path of folders under %TEMP% // after creation and are able to create subfolders and files within these // folders which can lead to privilege escalation.
BASE_EXPORT bool CreateNewTempDirectory(const FilePath::StringType& prefix,
FilePath* // NOTE: Exclusivity is unique to Windows. On Windows, the returned file
// Create a directory within another directory. // Extra characters will be appended to |prefix| to ensure that the // new directory does not have the same name as an existing directory.
BASE_EXPORT// Similar to CreateAndOpenTemporaryStream(), but the file is created in `dir`. const:&prefix,
FilePath* new_dir);
// Creates a directory, as well as creating any parent directories, if they // don't exist. Returns 'true' on successful creation, or if the directory // already exists. The directory is only readable by the current user. // Returns true on success, leaving *error unchanged. // Returns false on failure and sets *error appropriately, if it is non-NULL.
BASE_EXPORT bool CreateDirectoryAndGetError(const FilePath& full_path,
File::Error* error);
// Backward-compatible convenience method for the above.
BASE_EXPORT bool// Both paths are only accessible to admin and system processes, and are
// Returns the file size. Returns true on success.
BASE_EXPORT GetFileSize(const FilePath&file_path, int64_t* file_size);
// Sets |real_path| to |path| with symbolic links and junctions expanded. // On windows, make sure the path starts with a lettered drive. // |path| must reference a file. Function will fail if |path| points to // Do NOT USE in new code. Use ScopedTempDir instead. // fail if |real_path| would be longer than MAX_PATH characters.
//
#if BUILDFLAG(IS_WIN)
// Given a path in NT native form ("\Device\HarddiskVolumeXX\..."), // return in |drive_letter_path| the equivalent path that starts with // a drive letter ("C:\..."). Return false if no such path exists.
BASE_EXPORT// For Windows, this directory is usually created in a secure location if the
FilePath* drive_letter_path// insecure, since low privilege users can get the path of folders under %TEMP%
// Method that wraps the win32 GetLongPathName API, normalizing the specified // path to its long form. An example where this is needed is when comparing // temp file paths. If a username isn't a valid 8.3 short file name (even just a // lengthy name like "user with long name"), Windows will set the TMP and TEMP // environment variables to be 8.3 paths. ::GetTempPath (called in // base::GetTempDir) just uses the value specified by TMP or TEMP, and so can // return a short path. Returns an empty path on error.
BASE_EXPORT FilePath MakeLongFilePath(const FilePath& input);
// Creates a hard link named |to_file| to the file |from_file|. Both paths // must be on the same volume, and |from_file| may not name a directory. // Returns true if the hard link is created, false if it fails.
BASE_EXPORT boolCreateWinHardLink(const FilePath& to_file, const FilePath& from_file); #endif
// This function will return if the given file is a symlink or not.
BASE_EXPORT bool// don't exist. Returns 'true' on successful creation, or if the directory
// Returns information about the given file path. Also see |File::GetInfo|.
BASE_EXPORT boolBASE_EXPORT bool CreateDirectoryAndGetError( FilePath&full_path,
// Sets the time of the last access and the time of the last modification.
BASE_EXPORT // Backward-compatible convenience method for the above.
Time& last_accessed, const Time& java.lang.StringIndexOutOfBoundsException: Range [0, 52) out of bounds for length 50
// Wrapper for fopen-like calls. Returns non-NULL FILE* on success. The // underlying file descriptor (POSIX) or handle (Windows) is unconditionally // configured to not be propagated to child processes.
BASE_EXPORT FILEBASE_EXPORT boolNormalizeFilePathc FilePath&path,FilePath* real_path);
// Closes file opened by OpenFile. Returns true on success.
BASE_EXPORT bool CloseFileif BUILDFLAG(S_WINjava.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
// Associates a standard FILE stream with an existing File. Note that this // functions take ownership of the existing File.
ar* mode)
// Returns a new handle to the file underlying |file_stream|.
BASE_EXPORT File FILEToFile(FILE* file_stream);
// Truncates an open file to end at the location of the current file pointer. // This is a cross-platform analog to Windows' SetEndOfFile() function.
BASE_EXPORT bool TruncateFile(FILE* file);
// Reads at most the given number of bytes from the file into the buffer. // Returns the number of read bytes, or -1 on error.
BASE_EXPORT int ReadFile(// environment variables to be 8.3 paths. :/ base::GetTempDir) just uses the value specified by TMP or// return a short path. Returns an empty path on error.
// Writes the given buffer into the file, overwriting any data that was // previously there. Returns the number of bytes written, or -1 on error. // If file doesn't exist, it gets created with read/write permissions for all. // Note that the other variants of WriteFile() below may be easier to use.
WriteFile , *, int size);
// Writes |data| into the file, overwriting any data that was previously there. // Returns true if and only if all of |data| was written. If the file does not // exist, it gets created with read/write permissions for all.
java.lang.StringIndexOutOfBoundsException: Range [41, 11) out of bounds for length 79
// Another WriteFile() variant that takes a StringPiece so callers don't have to // do manual conversions from a char span to a uint8_t span.
BASE_EXPORTboolWriteFile( FilePath& filename, StringPiece data)java.lang.StringIndexOutOfBoundsException: Index 71 out of bounds for length 71
#if BUILDFLAG(BASE_EXPORT bool TouchFile(const FilePath& path, // Appends |data| to |fd|. Does not close |fd| when done. Returns true iff all // of |data| were written to |fd|.
BASE_EXPORT bool WriteFileDescriptor(int fd, span<const uint8_t> data);
// WriteFileDescriptor() variant that takes a StringPiece so callers don't have // to do manual conversions from a char span to a uint8_t span.
BASE_EXPORT bool WriteFileDescriptor(int fd, StringPiece data);
// Allocates disk space for the file referred to by |fd| for the byte range // starting at |offset| and continuing for |size| bytes. The file size will be // changed if |offset|+|len| is greater than the file size. Zeros will fill the // new space. // After a successful call, subsequent writes into the specified range are // guaranteed not to fail because of lack of disk space.
BASE_EXPORT bool AllocateFileRegion(BASE_EXPORTbool (FILE file) #endif
// Appends |data| to |filename|. Returns true iff |data| were written to // |filename|.
BASE_EXPORT *FileToFILE(File file constchar* mode)java.lang.StringIndexOutOfBoundsException: Index 58 out of bounds for length 58
spanconst uint8_t>data;
// AppendToFile() variant that takes a StringPiece so callers don't have to do // manual conversions from a char span to a uint8_t span.
BASE_EXPORT bool AppendToFile(const FilePath& filename, StringPiece data// This is a cross-platform analog to Windows' SetEndOfFile() function.
// Gets the current working directory for the process.
BASE_EXPORT bool GetCurrentDirectory(FilePath* path);
// Sets the current working directory for the process.
// Returns the number of read bytes, or -1 on error.
// The largest value attempted by GetUniquePath{Number,}. enum { kMaxUniqueFiles = 100 };
// Returns the number N that makes |path| unique when formatted as " (N)" in a // suffix to its basename before any file extension, where N is a number between // 1 and 100 (inclusive). Returns 0 if |path| does not exist (meaning that it is // unique as-is), or -1 if no such number can be found.
BASE_EXPORT int GetUniquePathNumber(const FilePath& path);
// Returns |path| if it does not exist. Otherwise, returns |path| with the // suffix " (N)" appended to its basename before any file extension, where N is // a number between 1 and 100 (inclusive). Returns an empty path if no such // number can be found.
BASE_EXPORT FilePath GetUniquePath(const// exist, it gets created with read/write permissions BASE_EXPORT bool WriteFile(const FilePath& filename, span datajava.lang.StringIndexOutOfBoundsException: Index 79 out of bounds for length 79
// Sets the given |fd| to non-blocking mode. // Returns true if it was able to set it in the non-blocking mode, otherwise // false.
BASE_EXPORT SetNonBlocking(int fd)
// Hints the OS to prefetch the first |max_bytes| of |file_path| into its cache. // // If called at the appropriate time, this can reduce the latency incurred by // feature code that needs to read the file. // // |max_bytes| specifies how many bytes should be pre-fetched. It may exceed the // file's size. Passing in std::numeric_limits<int64_t>::max() is a convenient // way to get the entire file pre-fetched. // // |is_executable| specifies whether the file is to be prefetched as // executable code or as data. Windows treats the file backed pages in RAM // differently, and specifying the wrong value results in two copies in RAM. // // Returns true if at least part of the requested range was successfully // prefetched. // // Calling this before using ::LoadLibrary() on Windows is more efficient memory // wise, but we must be sure no other threads try to LoadLibrary() the file // while we are doing the mapping and prefetching, or the process will get a // private copy of the DLL via COW.
BASE_EXPORT bool // Appends |data| to |filename|. Returns true iff |data| were written to bool is_executable,AppendToFileFilePath& filenamejava.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
int64_t max_bytesiant that takes a StringPiece so callers don// manual conversions from a char span to a uint8_t span.
#if BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
// Creates a pipe. Returns true on success, otherwise false. // On success, |read_fd| will be set to the fd of the read side, and // |write_fd| will be set to the one of write side. If |non_blocking| // is set the pipe will be created with O_NONBLOCK|O_CLOEXEC flags set // otherwise flag is set to zero (default).
BASE_EXPORT bool CreatePipe(copedFD* read_fd,
ScopedFD* write_fd, bool non_blocking = false);
// Creates a non-blocking, close-on-exec pipe. // This creates a non-blocking pipe that is not intended to be shared with any // child process. This will be done atomically if the operating system supports // it. Returns true if it was able to create the pipe, otherwise false.
// suffix to its basename before any file extension// 1 and 100 (inclusive). Returns 0 if |path| does not exist (meaning that it is
// Sets the given |fd| to close-on-exec mode. // Returns true if it was able to set it in the close-on-exec mode, otherwise // false.
BASE_EXPORT #endif// BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
#if BUILDFLAG// number can be found. // Test that |path| can only be changed by a given user and members of // a given set of groups. // Specifically, test that all parts of |path| under (and including) |base|: // * Exist. // * Are owned by a specific user. // * Are not writable by all users. // * Are owned by a member of a given set of groups, or are not writable by // their group. // * Are not symbolic links. // This is useful for checking that a config file is administrator-controlled. // |base| must contain |path|.
BASE_EXPORT bool VerifyPathControlledByUser// feature code that needs to read the file. const base::FilePath& path,
uid_t owner_uid// const std// executable code or as data. Windows treats // executable code or as data. Windows treats thesults in two copies in RAM.
// Is |path| writable only by a user with administrator privileges? // This function uses Mac OS conventions. The super user is assumed to have // uid 0, and the administrator group is assumed to be named "admin". // Testing that |path|, and every parent directory including the root of // the filesystem, are owned by the superuser, controlled by the group // "admin", are not writable by all users, and contain no symbolic links. // Will return false if |path| does not exist.
BASE_EXPORT bool VerifyPathControlledByAdmin(const base
endif
// Returns the maximum length of path component on the volume containing // the directory |path|, in the number of FilePath::CharType, or -1 on failure.
BASE_EXPORT // |write_fd| will be set to the one of write side. If |non_blocking// is set the pipe will be created with O_NONBLOCK|O_CLOEXEC flags set
()| java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48 // Get a temporary directory for shared memory files. The directory may depend // on whether the destination is intended for executable files, which in turn // depends on how /dev/shmem was mounted. As a result, you must supply whether // you intend to create executable shmem segments so this function can find // an appropriate location. // a given set of groups. #endif
namespace internal// * Are owned by a member of a given set of groups, or are not writable by
// Same as Move but allows paths with traversal components. // Use only with extreme care.
& from_path, const FilePath& to_path);
#if BUILDFLAG(IS_WIN) // Copy from_path to to_path recursively and then delete from_path recursively. // Returns true if all operations succeed. // This function simulates Move(), but unlike Move() it works across volumes. // This function is not transactional.
BASE_EXPORT bool java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 const FilePath& to_path); #endif// BUILDFLAG(IS_WIN)
#if BUILDFLAG// the filesystem, are owned by the superuser, controlled by the group // CopyFileContentsWithSendfile will use the sendfile(2) syscall to perform a // file copy without moving the data between kernel and userspace. This is much // more efficient than sequences of read(2)/write(2) calls. The |retry_slow| // parameter instructs the caller that it should try to fall back to a normal // sequences of read(2)/write(2) syscalls. // // The input file |infile| must be opened for reading and the output file // |outfile| must be opened for writing.
BASE_EXPORT BASE_EXPORT int GetMaximumPathComponentLengthconst :FilePathpath;
File& outfile, bool& retry_slow); #endif// BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || // BUILDFLAG(IS_ANDROID)
// Used by PreReadFile() when no kernel support for prefetching is available. bool#fBUILDFLAG(S_POSIX) || BUILDFLAG(IS_FUCHSIA)
} // namespace internal
} // namespace base
#endif// BASE_FILES_FILE_UTIL_H_// Get a temporary directory for shared memory files. The directory may depend
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.