(or (getenv "TMPDIR") (getenv "TMP") (getenv "TEMP") "/tmp"))))
"The directory for writing temporary files.")
+;; Emacs 21: Create a temporary file. (lisp/subr.el)
+;; Emacs 21.1-21.3
+;; (make-temp-file PREFIX &optional DIR-FLAG)
+;; Emacs 21.3.x(?) and later
+;; (make-temp-file PREFIX &optional DIR-FLAG SUFFIX)
+(static-condition-case nil
+ ;; compile-time check
+ (progn
+ (delete-file (make-temp-file "EMU" nil ".txt"))
+ (if (get 'make-temp-file 'defun-maybe)
+ (error "`make-temp-file' is already defined")))
+ (wrong-number-of-arguments ; Emacs 21.1-21.3
+ ;; load-time check.
+ ;; Replace original definition.
+ (or (fboundp 'si:make-temp-file)
+ (progn
+ (fset 'si:make-temp-file (symbol-function 'make-temp-file))
+ (put 'make-temp-file 'defun-maybe t)
+ (defun make-temp-file (prefix &optional dir-flag suffix)
+ "\
+Create a temporary file.
+The returned file name (created by appending some random characters at the end
+of PREFIX, and expanding against `temporary-file-directory' if necessary),
+is guaranteed to point to a newly created empty file.
+You can then use `write-region' to write new data into the file.
+
+If DIR-FLAG is non-nil, create a new empty directory instead of a file.
+
+If SUFFIX is non-nil, add that at the end of the file name."
+ (let ((umask (default-file-modes))
+ file)
+ (unwind-protect
+ (progn
+ ;; Create temp files with strict access rights.
+ ;; It's easy toloosen them later, whereas it's impossible
+ ;; to close the time-window of loose permissions otherwise.
+ (set-default-file-modes ?\700)
+ (while (condition-case ()
+ (progn
+ (setq file
+ (make-temp-name
+ (expand-file-name
+ prefix temporary-file-directory)))
+ (if suffix
+ (setq file (concat file suffix)))
+ (if dir-flag
+ (make-directory file)
+ (write-region "" nil file nil
+ 'silent nil 'excl))
+ nil)
+ (file-already-exists t))
+ ;; the file was somehow created by someone else between
+ ;; `make-temp-name' and `write-region', let's try again.
+ nil)
+ file)
+ ;; Reset the umask.
+ (set-default-file-modes umask))))
+ ;; for `load-history'.
+ (setq current-load-list (cons 'make-temp-file current-load-list)))))
+ (error)) ; found our definition or no definition at compile-time.
+
+;; For the Emacsen which don't have make-temp-file.
+(cond
+ ;; must be load-time check to share .elc between different systems.
+ ((fboundp 'make-temp-file))
+ ((memq system-type '(windows-nt ms-dos OS/2 emx))
+ ;; For single-user systems:
+ (defun-maybe make-temp-file (prefix &optional dir-flag suffix)
+ "Create a temporary file.
+The returned file name (created by appending some random characters at the end
+of PREFIX, and expanding against `temporary-file-directory' if necessary),
+is guaranteed to point to a newly created empty file.
+You can then use `write-region' to write new data into the file.
+
+If DIR-FLAG is non-nil, create a new empty directory instead of a file.
+
+If SUFFIX is non-nil, add that at the end of the file name."
+ (let ((file (make-temp-name (expand-file-name prefix
+ temporary-file-directory))))
+ (if suffix
+ (setq file (concat file suffix)))
+ (if dir-flag
+ (make-directory file)
+ (write-region "" nil file nil 'silent))
+ file)))
+ (t
+ (defun-maybe make-temp-file (prefix &optional dir-flag suffix)
+ "Create a temporary file.
+The returned file name (created by appending some random characters at the end
+of PREFIX, and expanding against `temporary-file-directory' if necessary),
+is guaranteed to point to a newly created empty file.
+You can then use `write-region' to write new data into the file.
+
+If DIR-FLAG is non-nil, create a new empty directory instead of a file.
+
+If SUFFIX is non-nil, add that at the end of the file name."
+ (let ((umask (default-file-modes)))
+ (unwind-protect
+ (let ((prefix (expand-file-name prefix temporary-file-directory)))
+ ;; Create temp files with strict access rights. It's easy to
+ ;; loosen them later, whereas it's impossible to close the
+ ;; time-window of loose permissions otherwise.
+ (set-default-file-modes 448)
+ (if dir-flag
+ ;; Create a new empty directory.
+ (let (dir)
+ (while (condition-case ()
+ (progn
+ (setq dir (make-temp-name prefix))
+ (if suffix
+ (setq dir (concat dir suffix)))
+ ;; `make-directory' returns nil for success,
+ ;; otherwise signals an error.
+ (make-directory dir))
+ ;; the dir was somehow created by someone else
+ ;; between `make-temp-name' and `make-directory',
+ ;; let's try again.
+ (file-already-exists t)))
+ dir)
+ ;; Create a new empty file.
+ (let (tempdir tempfile)
+ (unwind-protect
+ (let (file)
+ ;; First, create a temporary directory.
+ (while (condition-case ()
+ (progn
+ (setq tempdir (make-temp-name
+ (concat
+ (file-name-directory prefix)
+ "DIR")))
+ ;; return nil or signal an error.
+ (make-directory tempdir))
+ ;; let's try again.
+ (file-already-exists t)))
+ ;; Second, create a temporary file in the tempdir.
+ ;; There *is* a race condition between `make-temp-name'
+ ;; and `write-region', but we don't care it since we are
+ ;; in a private directory now.
+ (setq tempfile (make-temp-name (concat tempdir "/EMU")))
+ (write-region "" nil tempfile nil 'silent)
+ ;; Finally, make a hard-link from the tempfile.
+ (while (condition-case ()
+ (progn
+ (setq file (make-temp-name prefix))
+ (if suffix
+ (setq file (concat file suffix)))
+ ;; return nil or signal an error.
+ (add-name-to-file tempfile file))
+ ;; let's try again.
+ (file-already-exists t)))
+ file)
+ ;; Cleanup the tempfile.
+ (and tempfile
+ (file-exists-p tempfile)
+ (delete-file tempfile))
+ ;; Cleanup the tempdir.
+ (and tempdir
+ (file-directory-p tempdir)
+ (delete-directory tempdir))))))
+ ;; Reset the umask.
+ (set-default-file-modes umask))))))
+
;; Actually, `path-separator' is defined in src/emacs.c and overrided
;; in dos-w32.el.
(defvar-maybe path-separator ":"
projects / elisp / apel.git / blobdiff