(defun unix-environment-cmucl-from-sbcl (sbcl)
(mapcan
(lambda (string)
- (declare (type simple-string string))
+ (declare (type simple-base-string string))
(let ((=-pos (position #\= string :test #'equal)))
(if =-pos
(list
(mapcar
(lambda (cons)
(destructuring-bind (key . val) cons
- (declare (type keyword key) (type simple-string val))
- (concatenate 'simple-string (symbol-name key) "=" val)))
+ (declare (type keyword key) (type simple-base-string val))
+ (concatenate 'simple-base-string (symbol-name key) "=" val)))
cmucl))
\f
;;;; Import wait3(2) from Unix.
(stderr sb-alien:int))
;;; Is UNIX-FILENAME the name of a file that we can execute?
-;;; XXX does this actually work for symlinks?
(defun unix-filename-is-executable-p (unix-filename)
(declare (type simple-string unix-filename))
(values (and (eq (sb-unix:unix-file-kind unix-filename) :file)
(sb-unix:unix-access unix-filename sb-unix:x_ok))))
+(defun find-executable-in-search-path (pathname
+ &optional
+ (search-path (posix-getenv "PATH")))
+ "Find the first executable file matching PATHNAME in any of the colon-separated list of pathnames SEARCH-PATH"
+ (loop for end = (position #\: search-path :start (if end (1+ end) 0))
+ and start = 0 then (and end (1+ end))
+ while start
+ ;; <Krystof> the truename of a file naming a directory is the
+ ;; directory, at least until pfdietz comes along and says why
+ ;; that's noncompliant
+ for fullpath = (merge-pathnames
+ pathname (truename
+ (subseq search-path start end)))
+ when (unix-filename-is-executable-p (namestring fullpath))
+ return fullpath))
+
;;; FIXME: There shouldn't be two semiredundant versions of the
;;; documentation. Since this is a public extension function, the
;;; documentation should be in the doc string. So all information from
(posix-environ))
environment-p)
(wait t)
+ search
pty
input
if-input-does-not-exist
The &KEY arguments have the following meanings:
:ENVIRONMENT
- a list of SIMPLE-STRINGs describing the new Unix environment (as
- in \"man environ\"). The default is to copy the environment of
+ a list of SIMPLE-BASE-STRINGs describing the new Unix environment
+ (as in \"man environ\"). The default is to copy the environment of
the current process.
:ENV
an alternative lossy representation of the new Unix environment,
for compatibility with CMU CL
+ :SEARCH
+ Look for PROGRAM in each of the directories along the $PATH
+ environment variable. Otherwise an absolute pathname is required.
+ (See also FIND-EXECUTABLE-IN-SEARCH-PATH)
:WAIT
If non-NIL (default), wait until the created process finishes. If
NIL, continue running Lisp until the program finishes.
;; designator, but internally we'd like SIMPLE-STRINGs.
(simple-args (mapcar (lambda (x) (coerce x 'simple-string)) args)))
(unwind-protect
- (let (;; FIXME: The old code here used to do
- ;; (MERGE-PATHNAMES PROGRAM "path:"),
- ;; which is the right idea (searching through the Unix
- ;; PATH). Unfortunately, there is no logical pathname
- ;; "path:" defined in sbcl-0.6.10. It would probably be
- ;; reasonable to restore Unix PATH searching in SBCL, e.g.
- ;; with a function FIND-EXECUTABLE-FILE-IN-POSIX-PATH.
- ;; CMU CL did it with a "PATH:" search list, but CMU CL
- ;; search lists are a non-ANSI extension that SBCL
- ;; doesn't support. -- WHN)
- (pfile (unix-namestring program t))
+ (let ((pfile
+ (if search
+ (let ((p (find-executable-in-search-path program)))
+ (and p (unix-namestring p t)))
+ (unix-namestring program t)))
(cookie (list 0)))
(unless pfile
(error "no such program: ~S" program))