;;;; provided with absolutely no warranty. See the COPYING and CREDITS
;;;; files for more information.
-(in-package "SB-IMPL")
+(in-package "SB-IMPL") ;(SB-IMPL, not SB!IMPL, since we're built in warm load.)
\f
;;;; hacking the Unix environment
;;;;
;;;; which (at least in sbcl-0.6.10 on Red Hat Linux 6.2) is not
;;;; visible at GENESIS time.
-(def-alien-variable "environ" (* c-string))
+(define-alien-variable "environ" (* c-string))
+(push (lambda ()
+ ;; We redo this here to protect ourselves from this scenario:
+ ;; * Build under one version of shared lib, save a core.
+ ;; * Load core under another version of shared lib. ("Now
+ ;; where was environ again?" SIGSEGV, etc.)
+ ;; Obviously it's a KLUDGE to do this hack for every alien
+ ;; variable, but as it happens, as of sbcl-0.7.0 this is the
+ ;; only alien variable used to implement SBCL, so it's not
+ ;; worth coming up with a general solution. (A general
+ ;; solution would be nice for users who want to have their
+ ;; alien code be preserved across a save/load cycle, but this
+ ;; problem with alien variables is only one of several
+ ;; problems which'd need to be solved before that can happen.)
+ (define-alien-variable "environ" (* c-string)))
+ *after-save-initializations*)
(defun posix-environ ()
"Return the Unix environment (\"man environ\") as a list of SIMPLE-STRINGs."
\f
;;;; Import wait3(2) from Unix.
-(sb-alien:def-alien-routine ("wait3" c-wait3) sb-c-call:int
+(sb-alien:define-alien-routine ("wait3" c-wait3) sb-c-call:int
(status sb-c-call:int :out)
(options sb-c-call:int)
(rusage sb-c-call:int))
(defmethod print-object ((process process) stream)
(print-unreadable-object (process stream :type t)
(format stream
- "~D ~S"
+ "~W ~S"
(process-pid process)
(process-status process)))
process)
(defvar *handlers-installed* nil)
#+FreeBSD
-(def-alien-type nil
+(define-alien-type nil
(struct sgttyb
(sg-ispeed sb-c-call:char) ; input speed
(sg-ospeed sb-c-call:char) ; output speed
(sg-kill sb-c-call:char) ; kill character
(sg-flags sb-c-call:short))) ; mode flags
#+OpenBSD
-(def-alien-type nil
+(define-alien-type nil
(struct sgttyb
(sg-four sb-c-call:int)
(sg-chars (array sb-c-call:char 4))
(when (streamp pty)
(multiple-value-bind (new-fd errno) (sb-unix:unix-dup master)
(unless new-fd
- (error "couldn't SB-UNIX:UNIX-DUP ~D: ~A" master (strerror errno)))
+ (error "couldn't SB-UNIX:UNIX-DUP ~W: ~A" master (strerror errno)))
(push new-fd *close-on-error*)
(copy-descriptor-to-stream new-fd pty cookie)))
(values name
;; Blast the string into place.
(sb-kernel:copy-to-system-area (the simple-string s)
(* sb-vm:vector-data-offset
- sb-vm:word-bits)
+ sb-vm:n-word-bits)
string-sap 0
- (* (1+ n) sb-vm:byte-bits))
+ (* (1+ n) sb-vm:n-byte-bits))
;; Blast the pointer to the string into place.
(setf (sap-ref-sap vec-sap i) string-sap)
(setf string-sap (sap+ string-sap (round-bytes-to-words (1+ n))))
,@body)
(sb-sys:deallocate-system-memory ,sap ,size)))))
-(sb-alien:def-alien-routine spawn sb-c-call:int
+(sb-alien:define-alien-routine spawn sb-c-call:int
(program sb-c-call:c-string)
(argv (* sb-c-call:c-string))
(envp (* sb-c-call:c-string))
(stdout sb-c-call:int)
(stderr sb-c-call:int))
+;;; Is UNIX-FILENAME the name of a file that we can execute?
+(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))))
+
;;; 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
;; "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.
- ;; (I don't want to do it with search lists the way
- ;; that CMU CL did, because those are a non-ANSI
- ;; extension which I'd like to get rid of. -- WHN)
- (pfile (unix-namestring program t t))
+ ;; 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))
(cookie (list 0)))
(unless pfile
(error "no such program: ~S" program))
+ (unless (unix-filename-is-executable-p pfile)
+ (error "not executable: ~S" program))
(multiple-value-bind (stdin input-stream)
(get-descriptor-for input cookie
:direction :input
(setf handler
(sb-sys:add-fd-handler
descriptor
- :input #'(lambda (fd)
- (declare (ignore fd))
- (loop
- (unless handler
- (return))
- (multiple-value-bind
- (result readable/errno)
- (sb-unix:unix-select (1+ descriptor)
- (ash 1 descriptor)
- 0 0 0)
- (cond ((null result)
- (error "~@<couldn't select on sub-process: ~
+ :input (lambda (fd)
+ (declare (ignore fd))
+ (loop
+ (unless handler
+ (return))
+ (multiple-value-bind
+ (result readable/errno)
+ (sb-unix:unix-select (1+ descriptor)
+ (ash 1 descriptor)
+ 0 0 0)
+ (cond ((null result)
+ (error "~@<couldn't select on sub-process: ~
~2I~_~A~:>"
- (strerror readable/errno)))
- ((zerop result)
- (return))))
- (sb-alien:with-alien ((buf (sb-alien:array
- sb-c-call:char
- 256)))
- (multiple-value-bind
- (count errno)
- (sb-unix:unix-read descriptor
- (alien-sap buf)
- 256)
- (cond ((or (and (null count)
- (eql errno sb-unix:eio))
- (eql count 0))
- (sb-sys:remove-fd-handler handler)
- (setf handler nil)
- (decf (car cookie))
- (sb-unix:unix-close descriptor)
- (return))
- ((null count)
- (sb-sys:remove-fd-handler handler)
- (setf handler nil)
- (decf (car cookie))
- (error
- "~@<couldn't read input from sub-process: ~
+ (strerror readable/errno)))
+ ((zerop result)
+ (return))))
+ (sb-alien:with-alien ((buf (sb-alien:array
+ sb-c-call:char
+ 256)))
+ (multiple-value-bind
+ (count errno)
+ (sb-unix:unix-read descriptor
+ (alien-sap buf)
+ 256)
+ (cond ((or (and (null count)
+ (eql errno sb-unix:eio))
+ (eql count 0))
+ (sb-sys:remove-fd-handler handler)
+ (setf handler nil)
+ (decf (car cookie))
+ (sb-unix:unix-close descriptor)
+ (return))
+ ((null count)
+ (sb-sys:remove-fd-handler handler)
+ (setf handler nil)
+ (decf (car cookie))
+ (error
+ "~@<couldn't read input from sub-process: ~
~2I~_~A~:>"
- (strerror errno)))
- (t
- (sb-kernel:copy-from-system-area
- (alien-sap buf) 0
- string (* sb-vm:vector-data-offset
- sb-vm:word-bits)
- (* count sb-vm:byte-bits))
- (write-string string stream
- :end count)))))))))))
+ (strerror errno)))
+ (t
+ (sb-kernel:copy-from-system-area
+ (alien-sap buf) 0
+ string (* sb-vm:vector-data-offset
+ sb-vm:n-word-bits)
+ (* count sb-vm:n-byte-bits))
+ (write-string string stream
+ :end count)))))))))))
;;; Find a file descriptor to use for object given the direction.
;;; Returns the descriptor. If object is :STREAM, returns the created
projects / sbcl.git / blobdiff