X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/profile/blobdiff_plain/3ec148f042c6624f1c85b476696fd0aa03d393a3..0630988acc7864483d8f6ed96f0ff1971ddb4db6:/dot/lisp-init.lisp

diff --git a/dot/lisp-init.lisp b/dot/lisp-init.lisp
index ba26d22..da50a6f 100644
--- a/dot/lisp-init.lisp
+++ b/dot/lisp-init.lisp
@@ -16,6 +16,10 @@ (setf ext:*gc-verbose* nil
 ;; Obtain ASDF from somewhere.
 (require "asdf")
 
+;; Get CMU CL to quit on EOF.
+#+cmu
+(setf ext:*batch-mode* t)
+
 ;; Tell SBCL where to find its source source.
 #+sbcl
 (sb-ext:set-sbcl-source-location #p"/usr/share/sbcl-source/")
@@ -37,6 +41,31 @@ (let* ((homestring (or #+sbcl (sb-ext:posix-getenv "HOME")
 #+clisp
 (setf custom:*parse-namestring-ansi* t)
 
+;; CLisp history.
+#+(and clisp readline)
+(progn
+  (export '(*history-file* *history-size*))
+  (defvar *history-file* (format nil "~A/.clisp-history" (ext:getenv "HOME"))
+    "File to preserve the REPL history.")
+  (defvar *history-size* 1000)
+  (unless (and (probe-file *history-file*) nil)
+    (let (old-umask stream)
+      ;; Ugh.  There's no proper open(2) veneer.  Play with umask(2) to avoid
+      ;; a window in which an adversary can open the file.
+      (unwind-protect
+	   (setf old-umask (os:umask #o077)
+		 stream (open *history-file*
+			      :direction :output
+			      :if-exists :overwrite
+			      :if-does-not-exist :create))
+	(when stream (close stream))
+	(when old-umask (os:umask old-umask)))))
+  (readline:read-history *history-file*)
+  (if *history-size* (readline:stifle-history *history-size*)
+      (readline:unstifle-history))
+  (push (lambda () (readline:write-history *history-file*))
+	custom:*fini-hooks*))
+
 ;; Shebang.
 (set-dispatch-macro-character
  #\# #\!