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C/C++ Source or Header | 2003-08-23 | 32.8 KB | 790 lines

/* ==================================================================== * The Apache Software License, Version 1.1 * * Copyright (c) 2000-2003 The Apache Software Foundation. All rights * reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. The end-user documentation included with the redistribution, * if any, must include the following acknowledgment: * "This product includes software developed by the * Apache Software Foundation (http://www.apache.org/)." * Alternately, this acknowledgment may appear in the software itself, * if and wherever such third-party acknowledgments normally appear. * * 4. The names "Apache" and "Apache Software Foundation" must * not be used to endorse or promote products derived from this * software without prior written permission. For written * permission, please contact apache@apache.org. * * 5. Products derived from this software may not be called "Apache", * nor may "Apache" appear in their name, without prior written * permission of the Apache Software Foundation. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * ==================================================================== * * This software consists of voluntary contributions made by many * individuals on behalf of the Apache Software Foundation. For more * information on the Apache Software Foundation, please see * <http://www.apache.org/>. */ #ifndef APR_FILE_IO_H #define APR_FILE_IO_H /** * @file apr_file_io.h * @brief APR File I/O Handling */ #include "apr.h" #include "apr_pools.h" #include "apr_time.h" #include "apr_errno.h" #include "apr_file_info.h" #include "apr_inherit.h" #define APR_WANT_STDIO /**< for SEEK_* */ #define APR_WANT_IOVEC /**< for apr_file_writev */ #include "apr_want.h" #ifdef __cplusplus extern "C" { #endif /* __cplusplus */ /** * @defgroup apr_file_io File I/O Handling Functions * @ingroup APR * @{ */ /** * @defgroup apr_file_open_flags File Open Flags/Routines * @{ */ /* Note to implementors: Values in the range 0x00100000--0x80000000 are reserved for platform-specific values. */ #define APR_READ 0x00001 /**< Open the file for reading */ #define APR_WRITE 0x00002 /**< Open the file for writing */ #define APR_CREATE 0x00004 /**< Create the file if not there */ #define APR_APPEND 0x00008 /**< Append to the end of the file */ #define APR_TRUNCATE 0x00010 /**< Open the file and truncate to 0 length */ #define APR_BINARY 0x00020 /**< Open the file in binary mode */ #define APR_EXCL 0x00040 /**< Open should fail if APR_CREATE and file exists. */ #define APR_BUFFERED 0x00080 /**< Open the file for buffered I/O */ #define APR_DELONCLOSE 0x00100 /**< Delete the file after close */ #define APR_XTHREAD 0x00200 /**< Platform dependent tag to open the file for use across multiple threads */ #define APR_SHARELOCK 0x00400 /**< Platform dependent support for higher level locked read/write access to support writes across process/machines */ #define APR_FILE_NOCLEANUP 0x00800 /**< Do not register a cleanup when the file is opened */ #define APR_SENDFILE_ENABLED 0x01000 /**< Advisory flag that this file should support apr_sendfile operation */ /** @} */ /** * @defgroup apr_file_seek_flags File Seek Flags * @{ */ /* flags for apr_file_seek */ /** Set the file position */ #define APR_SET SEEK_SET /** Current */ #define APR_CUR SEEK_CUR /** Go to end of file */ #define APR_END SEEK_END /** @} */ /** * @defgroup apr_file_attrs_set_flags File Attribute Flags * @{ */ /* flags for apr_file_attrs_set */ #define APR_FILE_ATTR_READONLY 0x01 /**< File is read-only */ #define APR_FILE_ATTR_EXECUTABLE 0x02 /**< File is executable */ #define APR_FILE_ATTR_HIDDEN 0x04 /**< File is hidden */ /** @} */ /** File attributes */ typedef apr_uint32_t apr_fileattrs_t; /** should be same as whence type in lseek, POSIX defines this as int */ typedef int apr_seek_where_t; /** * Structure for referencing files. */ typedef struct apr_file_t apr_file_t; /* File lock types/flags */ /** * @defgroup apr_file_lock_types File Lock Types * @{ */ #define APR_FLOCK_SHARED 1 /**< Shared lock. More than one process or thread can hold a shared lock at any given time. Essentially, this is a "read lock", preventing writers from establishing an exclusive lock. */ #define APR_FLOCK_EXCLUSIVE 2 /**< Exclusive lock. Only one process may hold an exclusive lock at any given time. This is analogous to a "write lock". */ #define APR_FLOCK_TYPEMASK 0x000F /**< mask to extract lock type */ #define APR_FLOCK_NONBLOCK 0x0010 /**< do not block while acquiring the file lock */ /** @} */ /** * Open the specified file. * @param new_file The opened file descriptor. * @param fname The full path to the file (using / on all systems) * @param flag Or'ed value of: * <PRE> * APR_READ open for reading * APR_WRITE open for writing * APR_CREATE create the file if not there * APR_APPEND file ptr is set to end prior to all writes * APR_TRUNCATE set length to zero if file exists * APR_BINARY not a text file (This flag is ignored on * UNIX because it has no meaning) * APR_BUFFERED buffer the data. Default is non-buffered * APR_EXCL return error if APR_CREATE and file exists * APR_DELONCLOSE delete the file after closing. * APR_XTHREAD Platform dependent tag to open the file * for use across multiple threads * APR_SHARELOCK Platform dependent support for higher * level locked read/write access to support * writes across process/machines * APR_FILE_NOCLEANUP Do not register a cleanup with the pool * passed in on the <EM>cont</EM> argument (see below). * The apr_os_file_t handle in apr_file_t will not * be closed when the pool is destroyed. * APR_SENDFILE_ENABLED Open with appropriate platform semantics * for sendfile operations. Advisory only, * apr_sendfile does not check this flag. * </PRE> * @param perm Access permissions for file. * @param cont The pool to use. * @remark If perm is APR_OS_DEFAULT and the file is being created, appropriate * default permissions will be used. *arg1 must point to a valid file_t, * or NULL (in which case it will be allocated) */ APR_DECLARE(apr_status_t) apr_file_open(apr_file_t **new_file, const char *fname, apr_int32_t flag, apr_fileperms_t perm, apr_pool_t *cont); /** * Close the specified file. * @param file The file descriptor to close. */ APR_DECLARE(apr_status_t) apr_file_close(apr_file_t *file); /** * delete the specified file. * @param path The full path to the file (using / on all systems) * @param cont The pool to use. * @remark If the file is open, it won't be removed until all instances are closed. */ APR_DECLARE(apr_status_t) apr_file_remove(const char *path, apr_pool_t *cont); /** * rename the specified file. * @param from_path The full path to the original file (using / on all systems) * @param to_path The full path to the new file (using / on all systems) * @param pool The pool to use. * @warning If a file exists at the new location, then it will be overwritten. * Moving files or directories across devices may not be possible. */ APR_DECLARE(apr_status_t) apr_file_rename(const char *from_path, const char *to_path, apr_pool_t *pool); /** * copy the specified file to another file. * @param from_path The full path to the original file (using / on all systems) * @param to_path The full path to the new file (using / on all systems) * @param perms Access permissions for the new file if it is created. * In place of the usual or'd combination of file permissions, the * value APR_FILE_SOURCE_PERMS may be given, in which case the source * file's permissions are copied. * @param pool The pool to use. * @remark The new file does not need to exist, it will be created if required. * @warning If the new file already exists, its contents will be overwritten. */ APR_DECLARE(apr_status_t) apr_file_copy(const char *from_path, const char *to_path, apr_fileperms_t perms, apr_pool_t *pool); /** * append the specified file to another file. * @param from_path The full path to the source file (using / on all systems) * @param to_path The full path to the destination file (using / on all systems) * @param perms Access permissions for the destination file if it is created. * In place of the usual or'd combination of file permissions, the * value APR_FILE_SOURCE_PERMS may be given, in which case the source * file's permissions are copied. * @param pool The pool to use. * @remark The new file does not need to exist, it will be created if required. */ APR_DECLARE(apr_status_t) apr_file_append(const char *from_path, const char *to_path, apr_fileperms_t perms, apr_pool_t *pool); /** * Are we at the end of the file * @param fptr The apr file we are testing. * @remark Returns APR_EOF if we are at the end of file, APR_SUCCESS otherwise. */ APR_DECLARE(apr_status_t) apr_file_eof(apr_file_t *fptr); /** * open standard error as an apr file pointer. * @param thefile The apr file to use as stderr. * @param cont The pool to allocate the file out of. * * @remark The only reason that the apr_file_open_std* functions exist * is that you may not always have a stderr/out/in on Windows. This * is generally a problem with newer versions of Windows and services. * * The other problem is that the C library functions generally work * differently on Windows and Unix. So, by using apr_file_open_std* * functions, you can get a handle to an APR struct that works with * the APR functions which are supposed to work identically on all * platforms. */ APR_DECLARE(apr_status_t) apr_file_open_stderr(apr_file_t **thefile, apr_pool_t *cont); /** * open standard output as an apr file pointer. * @param thefile The apr file to use as stdout. * @param cont The pool to allocate the file out of. * * @remark The only reason that the apr_file_open_std* functions exist * is that you may not always have a stderr/out/in on Windows. This * is generally a problem with newer versions of Windows and services. * * The other problem is that the C library functions generally work * differently on Windows and Unix. So, by using apr_file_open_std* * functions, you can get a handle to an APR struct that works with * the APR functions which are supposed to work identically on all * platforms. */ APR_DECLARE(apr_status_t) apr_file_open_stdout(apr_file_t **thefile, apr_pool_t *cont); /** * open standard input as an apr file pointer. * @param thefile The apr file to use as stdin. * @param cont The pool to allocate the file out of. * * @remark The only reason that the apr_file_open_std* functions exist * is that you may not always have a stderr/out/in on Windows. This * is generally a problem with newer versions of Windows and services. * * The other problem is that the C library functions generally work * differently on Windows and Unix. So, by using apr_file_open_std* * functions, you can get a handle to an APR struct that works with * the APR functions which are supposed to work identically on all * platforms. */ APR_DECLARE(apr_status_t) apr_file_open_stdin(apr_file_t **thefile, apr_pool_t *cont); /** * Read data from the specified file. * @param thefile The file descriptor to read from. * @param buf The buffer to store the data to. * @param nbytes On entry, the number of bytes to read; on exit, the number of bytes read. * @remark apr_file_read will read up to the specified number of bytes, but * never more. If there isn't enough data to fill that number of * bytes, all of the available data is read. The third argument is * modified to reflect the number of bytes read. If a char was put * back into the stream via ungetc, it will be the first character * returned. * * It is not possible for both bytes to be read and an APR_EOF or other * error to be returned. * * APR_EINTR is never returned. */ APR_DECLARE(apr_status_t) apr_file_read(apr_file_t *thefile, void *buf, apr_size_t *nbytes); /** * Write data to the specified file. * @param thefile The file descriptor to write to. * @param buf The buffer which contains the data. * @param nbytes On entry, the number of bytes to write; on exit, the number * of bytes written. * @remark apr_file_write will write up to the specified number of bytes, but never * more. If the OS cannot write that many bytes, it will write as many * as it can. The third argument is modified to reflect the * number * of bytes written. * * It is possible for both bytes to be written and an error to be returned. * * APR_EINTR is never returned. */ APR_DECLARE(apr_status_t) apr_file_write(apr_file_t *thefile, const void *buf, apr_size_t *nbytes); /** * Write data from iovec array to the specified file. * @param thefile The file descriptor to write to. * @param vec The array from which to get the data to write to the file. * @param nvec The number of elements in the struct iovec array. This must * be smaller than APR_MAX_IOVEC_SIZE. If it isn't, the function * will fail with APR_EINVAL. * @param nbytes The number of bytes written. * @remark It is possible for both bytes to be written and an error to be returned. * APR_EINTR is never returned. * * apr_file_writev is available even if the underlying operating system * * doesn't provide writev(). */ APR_DECLARE(apr_status_t) apr_file_writev(apr_file_t *thefile, const struct iovec *vec, apr_size_t nvec, apr_size_t *nbytes); /** * Read data from the specified file, ensuring that the buffer is filled * before returning. * @param thefile The file descriptor to read from. * @param buf The buffer to store the data to. * @param nbytes The number of bytes to read. * @param bytes_read If non-NULL, this will contain the number of bytes read. * @remark apr_file_read will read up to the specified number of bytes, but never * more. If there isn't enough data to fill that number of bytes, * then the process/thread will block until it is available or EOF * is reached. If a char was put back into the stream via ungetc, * it will be the first character returned. * * It is possible for both bytes to be read and an error to be * returned. And if *bytes_read is less than nbytes, an * accompanying error is _always_ returned. * * APR_EINTR is never returned. */ APR_DECLARE(apr_status_t) apr_file_read_full(apr_file_t *thefile, void *buf, apr_size_t nbytes, apr_size_t *bytes_read); /** * Write data to the specified file, ensuring that all of the data is * written before returning. * @param thefile The file descriptor to write to. * @param buf The buffer which contains the data. * @param nbytes The number of bytes to write. * @param bytes_written If non-NULL, this will contain the number of bytes written. * @remark apr_file_write will write up to the specified number of bytes, but never * more. If the OS cannot write that many bytes, the process/thread * will block until they can be written. Exceptional error such as * "out of space" or "pipe closed" will terminate with an error. * * It is possible for both bytes to be written and an error to be * returned. And if *bytes_written is less than nbytes, an * accompanying error is _always_ returned. * * APR_EINTR is never returned. */ APR_DECLARE(apr_status_t) apr_file_write_full(apr_file_t *thefile, const void *buf, apr_size_t nbytes, apr_size_t *bytes_written); /** * put a character into the specified file. * @param ch The character to write. * @param thefile The file descriptor to write to */ APR_DECLARE(apr_status_t) apr_file_putc(char ch, apr_file_t *thefile); /** * get a character from the specified file. * @param ch The character to read into * @param thefile The file descriptor to read from */ APR_DECLARE(apr_status_t) apr_file_getc(char *ch, apr_file_t *thefile); /** * put a character back onto a specified stream. * @param ch The character to write. * @param thefile The file descriptor to write to */ APR_DECLARE(apr_status_t) apr_file_ungetc(char ch, apr_file_t *thefile); /** * Get a string from a specified file. * @param str The buffer to store the string in. * @param len The length of the string * @param thefile The file descriptor to read from * @remark The buffer will be '\0'-terminated if any characters are stored. */ APR_DECLARE(apr_status_t) apr_file_gets(char *str, int len, apr_file_t *thefile); /** * Put the string into a specified file. * @param str The string to write. * @param thefile The file descriptor to write to */ APR_DECLARE(apr_status_t) apr_file_puts(const char *str, apr_file_t *thefile); /** * Flush the file's buffer. * @param thefile The file descriptor to flush */ APR_DECLARE(apr_status_t) apr_file_flush(apr_file_t *thefile); /** * duplicate the specified file descriptor. * @param new_file The structure to duplicate into. * @param old_file The file to duplicate. * @param p The pool to use for the new file. * @remark *new_file must point to a valid apr_file_t, or point to NULL */ APR_DECLARE(apr_status_t) apr_file_dup(apr_file_t **new_file, apr_file_t *old_file, apr_pool_t *p); /** * duplicate the specified file descriptor and close the original * @param new_file The old file that is to be closed and reused * @param old_file The file to duplicate * @param p The pool to use for the new file * * @remark new_file MUST point at a valid apr_file_t. It cannot be NULL */ APR_DECLARE(apr_status_t) apr_file_dup2(apr_file_t *new_file, apr_file_t *old_file, apr_pool_t *p); /** * move the specified file descriptor to a new pool * @param new_file Pointer in which to return the new apr_file_t * @param old_file The file to move * @param p The pool to which the descriptor is to be moved * @remark Unlike apr_file_dup2(), this function doesn't do an * OS dup() operation on the underlying descriptor; it just * moves the descriptor's apr_file_t wrapper to a new pool. * @remark The new pool need not be an ancestor of old_file's pool. * @remark After calling this function, old_file may not be used */ APR_DECLARE(apr_status_t) apr_file_setaside(apr_file_t **new_file, apr_file_t *old_file, apr_pool_t *p); /** * Move the read/write file offset to a specified byte within a file. * @param thefile The file descriptor * @param where How to move the pointer, one of: * <PRE> * APR_SET -- set the offset to offset * APR_CUR -- add the offset to the current position * APR_END -- add the offset to the current file size * </PRE> * @param offset The offset to move the pointer to. * @remark The third argument is modified to be the offset the pointer was actually moved to. */ APR_DECLARE(apr_status_t) apr_file_seek(apr_file_t *thefile, apr_seek_where_t where, apr_off_t *offset); /** * Create an anonymous pipe. * @param in The file descriptor to use as input to the pipe. * @param out The file descriptor to use as output from the pipe. * @param cont The pool to operate on. */ APR_DECLARE(apr_status_t) apr_file_pipe_create(apr_file_t **in, apr_file_t **out, apr_pool_t *cont); /** * Create a named pipe. * @param filename The filename of the named pipe * @param perm The permissions for the newly created pipe. * @param cont The pool to operate on. */ APR_DECLARE(apr_status_t) apr_file_namedpipe_create(const char *filename, apr_fileperms_t perm, apr_pool_t *cont); /** * Get the timeout value for a pipe or manipulate the blocking state. * @param thepipe The pipe we are getting a timeout for. * @param timeout The current timeout value in microseconds. */ APR_DECLARE(apr_status_t) apr_file_pipe_timeout_get(apr_file_t *thepipe, apr_interval_time_t *timeout); /** * Set the timeout value for a pipe or manipulate the blocking state. * @param thepipe The pipe we are setting a timeout on. * @param timeout The timeout value in microseconds. Values < 0 mean wait * forever, 0 means do not wait at all. */ APR_DECLARE(apr_status_t) apr_file_pipe_timeout_set(apr_file_t *thepipe, apr_interval_time_t timeout); /** file (un)locking functions. */ /** * Establish a lock on the specified, open file. The lock may be advisory * or mandatory, at the discretion of the platform. The lock applies to * the file as a whole, rather than a specific range. Locks are established * on a per-thread/process basis; a second lock by the same thread will not * block. * @param thefile The file to lock. * @param type The type of lock to establish on the file. */ APR_DECLARE(apr_status_t) apr_file_lock(apr_file_t *thefile, int type); /** * Remove any outstanding locks on the file. * @param thefile The file to unlock. */ APR_DECLARE(apr_status_t) apr_file_unlock(apr_file_t *thefile); /**accessor and general file_io functions. */ /** * return the file name of the current file. * @param new_path The path of the file. * @param thefile The currently open file. */ APR_DECLARE(apr_status_t) apr_file_name_get(const char **new_path, apr_file_t *thefile); /** * Return the data associated with the current file. * @param data The user data associated with the file. * @param key The key to use for retreiving data associated with this file. * @param file The currently open file. */ APR_DECLARE(apr_status_t) apr_file_data_get(void **data, const char *key, apr_file_t *file); /** * Set the data associated with the current file. * @param file The currently open file. * @param data The user data to associate with the file. * @param key The key to use for assocaiteing data with the file. * @param cleanup The cleanup routine to use when the file is destroyed. */ APR_DECLARE(apr_status_t) apr_file_data_set(apr_file_t *file, void *data, const char *key, apr_status_t (*cleanup)(void *)); /** * Write a string to a file using a printf format. * @param fptr The file to write to. * @param format The format string * @param ... The values to substitute in the format string * @return The number of bytes written */ APR_DECLARE_NONSTD(int) apr_file_printf(apr_file_t *fptr, const char *format, ...) __attribute__((format(printf,2,3))); /** * set the specified file's permission bits. * @param fname The file (name) to apply the permissions to. * @param perms The permission bits to apply to the file. * @warning Some platforms may not be able to apply all of the available * permission bits; APR_INCOMPLETE will be returned if some permissions * are specified which could not be set. * * Platforms which do not implement this feature will return APR_ENOTIMPL. */ APR_DECLARE(apr_status_t) apr_file_perms_set(const char *fname, apr_fileperms_t perms); /** * Set attributes of the specified file. * @param fname The full path to the file (using / on all systems) * @param attributes Or'd combination of * <PRE> * APR_FILE_ATTR_READONLY - make the file readonly * APR_FILE_ATTR_EXECUTABLE - make the file executable * APR_FILE_ATTR_HIDDEN - make the file hidden * </PRE> * @param attr_mask Mask of valid bits in attributes. * @param cont the pool to use. * @remark This function should be used in preference to explict manipulation * of the file permissions, because the operations to provide these * attributes are platform specific and may involve more than simply * setting permission bits. * @warning Platforms which do not implement this feature will return * APR_ENOTIMPL. */ APR_DECLARE(apr_status_t) apr_file_attrs_set(const char *fname, apr_fileattrs_t attributes, apr_fileattrs_t attr_mask, apr_pool_t *cont); /** * Set the mtime of the specified file. * @param fname The full path to the file (using / on all systems) * @param mtime The mtime to apply to the file. * @param pool The pool to use. * @warning Platforms which do not implement this feature will return * APR_ENOTIMPL. */ APR_DECLARE(apr_status_t) apr_file_mtime_set(const char *fname, apr_time_t mtime, apr_pool_t *pool); /** * Create a new directory on the file system. * @param path the path for the directory to be created. (use / on all systems) * @param perm Permissions for the new direcoty. * @param cont the pool to use. */ APR_DECLARE(apr_status_t) apr_dir_make(const char *path, apr_fileperms_t perm, apr_pool_t *cont); /** Creates a new directory on the file system, but behaves like * 'mkdir -p'. Creates intermediate directories as required. No error * will be reported if PATH already exists. * @param path the path for the directory to be created. (use / on all systems) * @param perm Permissions for the new direcoty. * @param pool the pool to use. */ APR_DECLARE(apr_status_t) apr_dir_make_recursive(const char *path, apr_fileperms_t perm, apr_pool_t *pool); /** * Remove directory from the file system. * @param path the path for the directory to be removed. (use / on all systems) * @param cont the pool to use. */ APR_DECLARE(apr_status_t) apr_dir_remove(const char *path, apr_pool_t *cont); /** * get the specified file's stats. * @param finfo Where to store the information about the file. * @param wanted The desired apr_finfo_t fields, as a bit flag of APR_FINFO_ values * @param thefile The file to get information about. */ APR_DECLARE(apr_status_t) apr_file_info_get(apr_finfo_t *finfo, apr_int32_t wanted, apr_file_t *thefile); /** * Truncate the file's length to the specified offset * @param fp The file to truncate * @param offset The offset to truncate to. */ APR_DECLARE(apr_status_t) apr_file_trunc(apr_file_t *fp, apr_off_t offset); /** * Retrieve the flags that were passed into apr_file_open() * when the file was opened. * @return apr_int32_t the flags */ APR_DECLARE(apr_int32_t) apr_file_flags_get(apr_file_t *f); /** * Get the pool used by the file. */ APR_POOL_DECLARE_ACCESSOR(file); /** * Set a file to be inherited by child processes. * */ APR_DECLARE_INHERIT_SET(file); /** @deprecated @see apr_file_inherit_set */ APR_DECLARE(void) apr_file_set_inherit(apr_file_t *file); /** * Unset a file from being inherited by child processes. */ APR_DECLARE_INHERIT_UNSET(file); /** @deprecated @see apr_file_inherit_unset */ APR_DECLARE(void) apr_file_unset_inherit(apr_file_t *file); /** * Open a temporary file * @param fp The apr file to use as a temporary file. * @param templ The template to use when creating a temp file. * @param flags The flags to open the file with. If this is zero, * the file is opened with * APR_CREATE | APR_READ | APR_WRITE | APR_EXCL | APR_DELONCLOSE * @param p The pool to allocate the file out of. * @remark * This function generates a unique temporary file name from template. * The last six characters of template must be XXXXXX and these are replaced * with a string that makes the filename unique. Since it will be modified, * template must not be a string constant, but should be declared as a character * array. * */ APR_DECLARE(apr_status_t) apr_file_mktemp(apr_file_t **fp, char *templ, apr_int32_t flags, apr_pool_t *p); /** * Find an existing directory suitable as a temporary storage location. * @param temp_dir The temp directory. * @param p The pool to use for any necessary allocations. * @remark * This function uses an algorithm to search for a directory that an * an application can use for temporary storage. Once such a * directory is found, that location is cached by the library. Thus, * callers only pay the cost of this algorithm once if that one time * is successful. * */ APR_DECLARE(apr_status_t) apr_temp_dir_get(const char **temp_dir, apr_pool_t *p); /** @} */ #ifdef __cplusplus } #endif #endif /* ! APR_FILE_IO_H */