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- /*
- * Copyright (C) 2004, 2005 Internet Systems Consortium, Inc. ("ISC")
- * Copyright (C) 2000, 2001 Internet Software Consortium.
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
- * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
- * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
- * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
- * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- * PERFORMANCE OF THIS SOFTWARE.
- */
-
- /* $Id: file.h,v 1.27.18.2 2005/04/29 00:16:54 marka Exp $ */
-
- #ifndef ISC_FILE_H
- #define ISC_FILE_H 1
-
- /*! \file */
-
- #include <stdio.h>
-
- #include <isc/lang.h>
- #include <isc/types.h>
-
- ISC_LANG_BEGINDECLS
-
- isc_result_t
- isc_file_settime(const char *file, isc_time_t *time);
-
- isc_result_t
- isc_file_getmodtime(const char *file, isc_time_t *time);
- /*!<
- * \brief Get the time of last modication of a file.
- *
- * Notes:
- *\li The time that is set is relative to the (OS-specific) epoch, as are
- * all isc_time_t structures.
- *
- * Requires:
- *\li file != NULL.
- *\li time != NULL.
- *
- * Ensures:
- *\li If the file could not be accessed, 'time' is unchanged.
- *
- * Returns:
- *\li #ISC_R_SUCCESS
- * Success.
- *\li #ISC_R_NOTFOUND
- * No such file exists.
- *\li #ISC_R_INVALIDFILE
- * The path specified was not usable by the operating system.
- *\li #ISC_R_NOPERM
- * The file's metainformation could not be retrieved because
- * permission was denied to some part of the file's path.
- *\li #ISC_R_EIO
- * Hardware error interacting with the filesystem.
- *\li #ISC_R_UNEXPECTED
- * Something totally unexpected happened.
- *
- */
-
- isc_result_t
- isc_file_mktemplate(const char *path, char *buf, size_t buflen);
- /*!<
- * \brief Generate a template string suitable for use with isc_file_openunique().
- *
- * Notes:
- *\li This function is intended to make creating temporary files
- * portable between different operating systems.
- *
- *\li The path is prepended to an implementation-defined string and
- * placed into buf. The string has no path characters in it,
- * and its maximum length is 14 characters plus a NUL. Thus
- * buflen should be at least strlen(path) + 15 characters or
- * an error will be returned.
- *
- * Requires:
- *\li buf != NULL.
- *
- * Ensures:
- *\li If result == #ISC_R_SUCCESS:
- * buf contains a string suitable for use as the template argument
- * to isc_file_openunique().
- *
- *\li If result != #ISC_R_SUCCESS:
- * buf is unchanged.
- *
- * Returns:
- *\li #ISC_R_SUCCESS Success.
- *\li #ISC_R_NOSPACE buflen indicates buf is too small for the catenation
- * of the path with the internal template string.
- */
-
-
- isc_result_t
- isc_file_openunique(char *templet, FILE **fp);
- /*!<
- * \brief Create and open a file with a unique name based on 'templet'.
- *
- * Notes:
- *\li 'template' is a reserved work in C++. If you want to complain
- * about the spelling of 'templet', first look it up in the
- * Merriam-Webster English dictionary. (http://www.m-w.com/)
- *
- *\li This function works by using the template to generate file names.
- * The template must be a writable string, as it is modified in place.
- * Trailing X characters in the file name (full file name on Unix,
- * basename on Win32 -- eg, tmp-XXXXXX vs XXXXXX.tmp, respectively)
- * are replaced with ASCII characters until a non-existent filename
- * is found. If the template does not include pathname information,
- * the files in the working directory of the program are searched.
- *
- *\li isc_file_mktemplate is a good, portable way to get a template.
- *
- * Requires:
- *\li 'fp' is non-NULL and '*fp' is NULL.
- *
- *\li 'template' is non-NULL, and of a form suitable for use by
- * the system as described above.
- *
- * Ensures:
- *\li If result is #ISC_R_SUCCESS:
- * *fp points to an stream opening in stdio's "w+" mode.
- *
- *\li If result is not #ISC_R_SUCCESS:
- * *fp is NULL.
- *
- * No file is open. Even if one was created (but unable
- * to be reopened as a stdio FILE pointer) then it has been
- * removed.
- *
- *\li This function does *not* ensure that the template string has not been
- * modified, even if the operation was unsuccessful.
- *
- * Returns:
- *\li #ISC_R_SUCCESS
- * Success.
- *\li #ISC_R_EXISTS
- * No file with a unique name could be created based on the
- * template.
- *\li #ISC_R_INVALIDFILE
- * The path specified was not usable by the operating system.
- *\li #ISC_R_NOPERM
- * The file could not be created because permission was denied
- * to some part of the file's path.
- *\li #ISC_R_IOERROR
- * Hardware error interacting with the filesystem.
- *\li #ISC_R_UNEXPECTED
- * Something totally unexpected happened.
- */
-
- isc_result_t
- isc_file_remove(const char *filename);
- /*!<
- * \brief Remove the file named by 'filename'.
- */
-
- isc_result_t
- isc_file_rename(const char *oldname, const char *newname);
- /*!<
- * \brief Rename the file 'oldname' to 'newname'.
- */
-
- isc_boolean_t
- isc_file_exists(const char *pathname);
- /*!<
- * \brief Return #ISC_TRUE if the calling process can tell that the given file exists.
- * Will not return true if the calling process has insufficient privileges
- * to search the entire path.
- */
-
- isc_boolean_t
- isc_file_isabsolute(const char *filename);
- /*!<
- * \brief Return #ISC_TRUE if the given file name is absolute.
- */
-
- isc_boolean_t
- isc_file_iscurrentdir(const char *filename);
- /*!<
- * \brief Return #ISC_TRUE if the given file name is the current directory (".").
- */
-
- isc_boolean_t
- isc_file_ischdiridempotent(const char *filename);
- /*%<
- * Return #ISC_TRUE if calling chdir(filename) multiple times will give
- * the same result as calling it once.
- */
-
- const char *
- isc_file_basename(const char *filename);
- /*%<
- * Return the final component of the path in the file name.
- */
-
- isc_result_t
- isc_file_progname(const char *filename, char *buf, size_t buflen);
- /*!<
- * \brief Given an operating system specific file name "filename"
- * referring to a program, return the canonical program name.
- *
- *
- * Any directory prefix or executable file name extension (if
- * used on the OS in case) is stripped. On systems where program
- * names are case insensitive, the name is canonicalized to all
- * lower case. The name is written to 'buf', an array of 'buflen'
- * chars, and null terminated.
- *
- * Returns:
- *\li #ISC_R_SUCCESS
- *\li #ISC_R_NOSPACE The name did not fit in 'buf'.
- */
-
- isc_result_t
- isc_file_template(const char *path, const char *templet, char *buf,
- size_t buflen);
- /*%<
- * Create an OS specific template using 'path' to define the directory
- * 'templet' to describe the filename and store the result in 'buf'
- * such that path can be renamed to buf atomically.
- */
-
- isc_result_t
- isc_file_renameunique(const char *file, char *templet);
- /*%<
- * Rename 'file' using 'templet' as a template for the new file name.
- */
-
- isc_result_t
- isc_file_absolutepath(const char *filename, char *path, size_t pathlen);
- /*%<
- * Given a file name, return the fully qualified path to the file.
- */
-
- /*
- * XXX We should also have a isc_file_writeeopen() function
- * for safely open a file in a publicly writable directory
- * (see write_open() in BIND 8's ns_config.c).
- */
-
- isc_result_t
- isc_file_truncate(const char *filename, isc_offset_t size);
- /*%<
- * Truncate/extend the file specified to 'size' bytes.
- */
-
- ISC_LANG_ENDDECLS
-
- #endif /* ISC_FILE_H */
-