X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=contrib%2Fsb-posix%2Finterface.lisp;h=7bc574b6e2c4b91ff01f65de7d9386de07580f08;hb=0b85642df140fabd8f0a91c85edff0543dc359b1;hp=a310e54601f1bbe0812e893dc2671ece6f798fdc;hpb=e411bd41397e1df2423838a4f9c2fdaa27727e93;p=sbcl.git

diff --git a/contrib/sb-posix/interface.lisp b/contrib/sb-posix/interface.lisp
index a310e54..7bc574b 100644
--- a/contrib/sb-posix/interface.lisp
+++ b/contrib/sb-posix/interface.lisp
@@ -1,90 +1,706 @@
-(cl:in-package :sb-posix-internal)
+(cl:in-package :sb-posix)
 
-(define-condition sb-posix::syscall-error (error)
-  ((errno :initarg :errno :reader sb-posix::syscall-errno))
+(defmacro define-protocol-class
+    (name alien-type superclasses slots &rest options)
+  (let ((to-protocol (intern (format nil "ALIEN-TO-~A" name)))
+        (to-alien (intern (format nil "~A-TO-ALIEN" name))))
+    `(progn
+      (export ',name :sb-posix)
+      (defclass ,name ,superclasses
+        ,(loop for slotd in slots
+               collect (ldiff slotd (member :array-length slotd)))
+        ,@options)
+      (declaim (inline ,to-alien ,to-protocol))
+      (declaim (inline ,to-protocol ,to-alien))
+      (defun ,to-protocol (alien &optional instance)
+        (declare (type (sb-alien:alien (* ,alien-type)) alien)
+                 (type (or null ,name) instance))
+        (unless instance
+          (setf instance (make-instance ',name)))
+        ,@(loop for slotd in slots
+                ;; FIXME: slotds in source are more complicated in general
+                ;;
+                ;; FIXME: baroque construction of intricate fragility
+                for array-length = (getf (cdr slotd) :array-length)
+                if array-length
+                  collect `(progn
+                             (let ((array (make-array ,array-length)))
+                               (setf (slot-value instance ',(car slotd))
+                                     array)
+                               (dotimes (i ,array-length)
+                                 (setf (aref array i)
+                                       (sb-alien:deref
+                                        (sb-alien:slot alien ',(car slotd))
+                                        i)))))
+                else
+                  collect `(setf (slot-value instance ',(car slotd))
+                                 (sb-alien:slot alien ',(car slotd))))
+        instance)
+      (defun ,to-alien (instance &optional alien)
+        (declare (type (or null (sb-alien:alien (* ,alien-type))) alien)
+                 (type ,name instance))
+        (unless alien
+          (setf alien (sb-alien:make-alien ,alien-type)))
+        ,@(loop for slotd in slots
+                for array-length = (getf (cdr slotd) :array-length)
+                if array-length
+                  collect `(progn
+                             (let ((array (slot-value instance ',(car slotd))))
+                               (dotimes (i ,array-length)
+                                 (setf (sb-alien:deref
+                                        (sb-alien:slot alien ',(car slotd))
+                                        i)
+                                       (aref array i)))))
+                else
+                  collect `(setf (sb-alien:slot alien ',(car slotd))
+                                 (slot-value instance ',(car slotd)))))
+      (find-class ',name))))
+
+(define-condition sb-posix:syscall-error (error)
+  ((errno :initarg :errno :reader sb-posix:syscall-errno))
   (:report (lambda (c s)
-	     (let ((errno (sb-posix::syscall-errno c)))
-	       (format s "System call error ~A (~A)"
-		       errno (sb-int:strerror errno))))))
+             (let ((errno (sb-posix:syscall-errno c)))
+               (format s "System call error ~A (~A)"
+                       errno (sb-int:strerror errno))))))
 
 (defun syscall-error ()
   (error 'sb-posix:syscall-error :errno (get-errno)))
 
+(declaim (inline never-fails))
+(defun never-fails (&rest args)
+  (declare (ignore args))
+  nil)
+
+;;; Some systems may need C-level wrappers, which can live in the
+;;; runtime (so that save-lisp-and-die can produce standalone
+;;; executables).  See REAL-C-NAME in macros.lisp for the use of this
+;;; variable.
+(eval-when (:compile-toplevel :load-toplevel)
+  (setf *c-functions-in-runtime*
+        '`(#+netbsd ,@("stat" "lstat" "fstat" "readdir" "opendir"))))
+
+
 ;;; filesystem access
+(defmacro define-call* (name &rest arguments)
+  #-win32 `(define-call ,name ,@arguments)
+  #+win32 `(define-call ,(if (consp name)
+                             `(,(concatenate 'string "_" (car name))
+                                ,@(cdr name))
+                             (concatenate 'string "_" name))
+               ,@arguments))
+
+(define-call* "access" int minusp (pathname filename) (mode int))
+(define-call* "chdir" int minusp (pathname filename))
+(define-call* "chmod" int minusp (pathname filename) (mode mode-t))
+(define-call* "close" int minusp (fd file-descriptor))
+(define-call* "creat" int minusp (pathname filename) (mode mode-t))
+(define-call* "dup" int minusp (oldfd file-descriptor))
+(define-call* "dup2" int minusp (oldfd file-descriptor)
+              (newfd file-descriptor))
+(define-call* ("lseek" :options :largefile)
+    off-t minusp (fd file-descriptor) (offset off-t)
+    (whence int))
+(define-call* "mkdir" int minusp (pathname filename) (mode mode-t))
+(macrolet ((def (x)
+               `(progn
+                 (define-call-internally open-with-mode ,x int minusp
+                   (pathname filename) (flags int) (mode mode-t))
+                 (define-call-internally open-without-mode ,x int minusp
+                   (pathname filename) (flags int))
+                 (define-entry-point ,x
+                     (pathname flags &optional (mode nil mode-supplied))
+                   (if mode-supplied
+                       (open-with-mode pathname flags mode)
+                       (open-without-mode pathname flags))))))
+    (def #-win32 "open" #+win32 "_open"))
+(define-call "rename" int minusp (oldpath filename) (newpath filename))
+(define-call* "rmdir" int minusp (pathname filename))
+(define-call* "unlink" int minusp (pathname filename))
+(define-call #-netbsd "opendir" #+netbsd "_opendir"
+    (* t) null-alien (pathname filename))
+(define-call (#-netbsd "readdir" #+netbsd "_readdir" :options :largefile)
+  (* dirent)
+  ;; readdir() has the worst error convention in the world.  It's just
+  ;; too painful to support.  (return is NULL _and_ errno "unchanged"
+  ;; is not an error, it's EOF).
+  not
+  (dir (* t)))
+(define-call "closedir" int minusp (dir (* t)))
+;; need to do this here because we can't do it in the DEFPACKAGE
+(define-call* "umask" mode-t never-fails (mode mode-t))
+(define-call* "getpid" pid-t never-fails)
+
+#-win32
+(progn
+  (define-call "chown" int minusp (pathname filename)
+               (owner uid-t) (group gid-t))
+  (define-call "chroot" int minusp (pathname filename))
+  (define-call "fchdir" int minusp (fd file-descriptor))
+  (define-call "fchmod" int minusp (fd file-descriptor) (mode mode-t))
+  (define-call "fchown" int minusp (fd file-descriptor)
+               (owner uid-t)  (group gid-t))
+  (define-call "fdatasync" int minusp (fd file-descriptor))
+  (define-call ("ftruncate" :options :largefile)
+      int minusp (fd file-descriptor) (length off-t))
+  (define-call "fsync" int minusp (fd file-descriptor))
+  (define-call "lchown" int minusp (pathname filename)
+               (owner uid-t)  (group gid-t))
+  (define-call "link" int minusp (oldpath filename) (newpath filename))
+  (define-call "lockf" int minusp (fd file-descriptor) (cmd int) (len off-t))
+  (define-call "mkfifo" int minusp (pathname filename) (mode mode-t))
+  (define-call "symlink" int minusp (oldpath filename) (newpath filename))
+  (define-call "sync" void never-fails)
+  (define-call ("truncate" :options :largefile)
+      int minusp (pathname filename) (length off-t))
+  ;; FIXME: Windows does have _mktemp, which has a slightlty different
+  ;; interface
+  (defun mkstemp (template)
+    ;; we are emulating sb-alien's charset conversion for strings
+    ;; here, to accommodate for the call-by-reference nature of
+    ;; mkstemp's template strings.
+    (let ((arg (sb-ext:string-to-octets
+                (filename template)
+                :external-format sb-alien::*default-c-string-external-format*)))
+      (sb-sys:with-pinned-objects (arg)
+        (let ((result (alien-funcall (extern-alien "mkstemp"
+                                                   (function int c-string))
+                                     (sap-alien (sb-alien::vector-sap arg)
+                                                (* char)))))
+          (when (minusp result)
+            (syscall-error))
+          (values result
+                  (sb-ext:octets-to-string
+                   arg
+                   :external-format sb-alien::*default-c-string-external-format*))))))
+  (define-call-internally ioctl-without-arg "ioctl" int minusp
+                          (fd file-descriptor) (cmd int))
+  (define-call-internally ioctl-with-int-arg "ioctl" int minusp
+                          (fd file-descriptor) (cmd int) (arg int))
+  (define-call-internally ioctl-with-pointer-arg "ioctl" int minusp
+                          (fd file-descriptor) (cmd int)
+                          (arg alien-pointer-to-anything-or-nil))
+  (define-entry-point "ioctl" (fd cmd &optional (arg nil argp))
+    (if argp
+        (etypecase arg
+          ((alien int) (ioctl-with-int-arg fd cmd arg))
+          ((or (alien (* t)) null) (ioctl-with-pointer-arg fd cmd arg)))
+        (ioctl-without-arg fd cmd)))
+  (define-call-internally fcntl-without-arg "fcntl" int minusp
+                          (fd file-descriptor) (cmd int))
+  (define-call-internally fcntl-with-int-arg "fcntl" int minusp
+                          (fd file-descriptor) (cmd int) (arg int))
+  (define-call-internally fcntl-with-pointer-arg "fcntl" int minusp
+                          (fd file-descriptor) (cmd int)
+                          (arg alien-pointer-to-anything-or-nil))
+  (define-entry-point "fcntl" (fd cmd &optional (arg nil argp))
+    (if argp
+        (etypecase arg
+          ((alien int) (fcntl-with-int-arg fd cmd arg))
+          ((or (alien (* t)) null) (fcntl-with-pointer-arg fd cmd arg)))
+        (fcntl-without-arg fd cmd)))
+
+  ;; uid, gid
+  (define-call "geteuid" uid-t never-fails) ; "always successful", it says
+  (define-call "getresuid" uid-t never-fails)
+  (define-call "getuid" uid-t never-fails)
+  (define-call "seteuid" int minusp (uid uid-t))
+  (define-call "setfsuid" int minusp (uid uid-t))
+  (define-call "setreuid" int minusp (ruid uid-t) (euid uid-t))
+  (define-call "setresuid" int minusp (ruid uid-t) (euid uid-t) (suid uid-t))
+  (define-call "setuid" int minusp (uid uid-t))
+  (define-call "getegid" gid-t never-fails)
+  (define-call "getgid" gid-t never-fails)
+  (define-call "getresgid" gid-t never-fails)
+  (define-call "setegid" int minusp (gid gid-t))
+  (define-call "setfsgid" int minusp (gid gid-t))
+  (define-call "setgid" int minusp (gid gid-t))
+  (define-call "setregid" int minusp (rgid gid-t) (egid gid-t))
+  (define-call "setresgid" int minusp (rgid gid-t) (egid gid-t) (sgid gid-t))
+
+  ;; processes, signals
+  (define-call "alarm" int never-fails (seconds unsigned))
+
+
+
+  #+mach-exception-handler
+  (progn
+    ;; FIXME this is a lie, of course this can fail, but there's no
+    ;; error handling here yet!
+    (define-call "setup_mach_exceptions" void never-fails)
+    (define-call ("posix_fork" :c-name "fork") pid-t minusp)
+    (defun fork ()
+      (let ((pid (posix-fork)))
+        (when (= pid 0)
+          (setup-mach-exceptions))
+        pid))
+    (export 'fork :sb-posix))
 
-(define-call "access" int minusp (pathname filename) (mode int))
-(define-call "chdir" int minusp (pathname filename))
-(define-call "chmod" int minusp (pathname filename) (mode sb-posix::mode-t))
-(define-call "chown" int minusp (pathname filename)
-	     (owner sb-posix::uid-t)  (group sb-posix::gid-t))
-(define-call "close" int minusp (fd file-descriptor))
-(define-call "dup" int minusp (oldfd file-descriptor))
-(define-call "dup2" int minusp (oldfd file-descriptor) (newfd file-descriptor))
-(define-call "fchdir" int minusp (fd file-descriptor))
-(define-call "fchmod" int minusp (fd file-descriptor) (mode sb-posix::mode-t))
-(define-call "fchown" int minusp (fd file-descriptor)
-	     (owner sb-posix::uid-t)  (group sb-posix::gid-t))
-(define-call "link" int minusp (oldpath filename) (newpath filename))
-(define-call "lchown" int minusp (pathname filename)
-	     (owner sb-posix::uid-t)  (group sb-posix::gid-t))
-(define-call "mkdir" int minusp (pathname filename) (mode sb-posix::mode-t))
-;;(define-call "readlink" int minusp (path filename) (buf (* t)) (len int))
-(define-call "rmdir" int minusp (pathname filename))
-(define-call "symlink" int minusp (oldpath filename) (newpath filename))
-(define-call "unlink" int minusp (pathname filename))
-
-
-;;; uid, gid
-
-(define-call "geteuid" sb-posix::uid-t not)	;"always successful", it says
-(define-call "getresuid" sb-posix::uid-t not)
-(define-call "getuid" sb-posix::uid-t not)
-(define-call "seteuid" int minusp (uid sb-posix::uid-t))
-#+linux (define-call "setfsuid" int minusp (uid sb-posix::uid-t))
-(define-call "setreuid" int minusp
-	     (ruid sb-posix::uid-t) (euid sb-posix::uid-t))
-(define-call "setresuid" int minusp
-	     (ruid sb-posix::uid-t) (euid sb-posix::uid-t)
-	     (suid sb-posix::uid-t))
-(define-call "setuid" int minusp (uid sb-posix::uid-t))
-
-(define-call "getegid" sb-posix::gid-t not)
-(define-call "getgid" sb-posix::gid-t not)
-(define-call "getresgid" sb-posix::gid-t not)
-(define-call "setegid" int minusp (gid sb-posix::gid-t))
-#+linux (define-call "setfsgid" int minusp (gid sb-posix::gid-t))
-(define-call "setgid" int minusp (gid sb-posix::gid-t))
-(define-call "setregid" int minusp
-	     (rgid sb-posix::gid-t) (egid sb-posix::gid-t))
-(define-call "setresgid" int minusp
-	     (rgid sb-posix::gid-t)
-	     (egid sb-posix::gid-t) (sgid sb-posix::gid-t))
-
-;;; processes, signals
-(define-call "alarm" int not (seconds unsigned))
-(define-call "getpgid" sb-posix::pid-t minusp (pid sb-posix::pid-t))
-(define-call "getpid" sb-posix::pid-t not)
-(define-call "getppid" sb-posix::pid-t not)
-(define-call "getpgrp" sb-posix::pid-t not)
-(define-call "getsid" sb-posix::pid-t minusp  (pid sb-posix::pid-t))
-(define-call "kill" int minusp (pid sb-posix::pid-t) (signal int))
-(define-call "killpg" int minusp (pgrp int) (signal int))
-(define-call "pause" int minusp)
-(define-call "setpgid" int minusp
-	     (pid sb-posix::pid-t) (pgid sb-posix::pid-t))
-(define-call "setpgrp" int minusp)
-
-;;; mmap
-(define-call "mmap" sb-sys:system-area-pointer
-  ;; KLUDGE: #XFFFFFFFF is (void *)-1, which is the charming return
-  ;; value of mmap on failure.  Except on 64 bit systems ...
-  (lambda (res)
-    (= (sb-sys:sap-int res) #-alpha #XFFFFFFFF #+alpha #xffffffffffffffff))
-  (addr sap-or-nil) (length unsigned) (prot unsigned)
-  (flags unsigned) (fd file-descriptor) (offset int))
-
-(define-call "munmap" int minusp
-  (start sb-sys:system-area-pointer) (length unsigned))
+  #-mach-exception-handler
+  (define-call "fork" pid-t minusp)
 
+  (define-call "getpgid" pid-t minusp (pid pid-t))
+  (define-call "getppid" pid-t never-fails)
+  (define-call "getpgrp" pid-t never-fails)
+  (define-call "getsid" pid-t minusp  (pid pid-t))
+  (define-call "kill" int minusp (pid pid-t) (signal int))
+  (define-call "killpg" int minusp (pgrp int) (signal int))
+  (define-call "pause" int minusp)
+  (define-call "setpgid" int minusp (pid pid-t) (pgid pid-t))
+  (define-call "setpgrp" int minusp))
+
+(defmacro with-growing-c-string ((buffer size) &body body)
+  (sb-int:with-unique-names (c-string-block)
+    `(block ,c-string-block
+       (let (,buffer)
+         (flet ((,buffer (&optional (size-incl-null))
+                  (when size-incl-null
+                    (setf (sb-sys:sap-ref-8 (sb-alien:alien-sap ,buffer) size-incl-null)
+                          0))
+                  (return-from ,c-string-block
+                    (sb-alien::c-string-to-string
+                     (sb-alien:alien-sap ,buffer)
+                     (sb-impl::default-external-format)
+                     'character))))
+           (loop for ,size = 128 then (* 2 ,size)
+                 do (unwind-protect
+                         (progn
+                           (setf ,buffer (make-alien c-string ,size))
+                           ,@body)
+                      (when ,buffer
+                        (free-alien ,buffer)))))))))
+
+#-win32
+(progn
+  (export 'readlink :sb-posix)
+  (defun readlink (pathspec)
+    "Returns the resolved target of a symbolic link as a string."
+    (flet ((%readlink (path buf length)
+             (alien-funcall
+              (extern-alien "readlink" (function int c-string (* t) int))
+              path buf length)))
+      (with-growing-c-string (buf size)
+        (let ((count (%readlink (filename pathspec) buf size)))
+          (cond ((minusp count)
+                 (syscall-error))
+                ((< 0 count size)
+                 (buf count))))))))
+
+(progn
+  (export 'getcwd :sb-posix)
+  (defun getcwd ()
+    "Returns the process's current working directory as a string."
+    (flet ((%getcwd (buffer size)
+             (alien-funcall
+              (extern-alien #-win32 "getcwd"
+                            #+win32 "_getcwd" (function c-string (* t) int))
+              buffer size)))
+      (with-growing-c-string (buf size)
+        (let ((result (%getcwd buf size)))
+          (cond (result
+                 (buf))
+                ((/= (get-errno) sb-posix:erange)
+                 (syscall-error))))))))
+
+#-win32
+(progn
+ (export 'wait :sb-posix)
+ (declaim (inline wait))
+ (defun wait (&optional statusptr)
+   (declare (type (or null (simple-array (signed-byte 32) (1))) statusptr))
+   (let* ((ptr (or statusptr (make-array 1 :element-type '(signed-byte 32))))
+          (pid (sb-sys:with-pinned-objects (ptr)
+                 (alien-funcall
+                  (extern-alien "wait" (function pid-t (* int)))
+                  (sb-sys:vector-sap ptr)))))
+     (if (minusp pid)
+         (syscall-error)
+         (values pid (aref ptr 0))))))
+
+#-win32
+(progn
+ (export 'waitpid :sb-posix)
+ (declaim (inline waitpid))
+ (defun waitpid (pid options &optional statusptr)
+   (declare (type (sb-alien:alien pid-t) pid)
+            (type (sb-alien:alien int) options)
+            (type (or null (simple-array (signed-byte 32) (1))) statusptr))
+   (let* ((ptr (or statusptr (make-array 1 :element-type '(signed-byte 32))))
+          (pid (sb-sys:with-pinned-objects (ptr)
+                 (alien-funcall
+                  (extern-alien "waitpid" (function pid-t
+                                                    pid-t (* int) int))
+                  pid (sb-sys:vector-sap ptr) options))))
+     (if (minusp pid)
+         (syscall-error)
+         (values pid (aref ptr 0)))))
+ ;; waitpid macros
+ (define-call "wifexited" boolean never-fails (status int))
+ (define-call "wexitstatus" int never-fails (status int))
+ (define-call "wifsignaled" boolean never-fails (status int))
+ (define-call "wtermsig" int never-fails (status int))
+ (define-call "wifstopped" boolean never-fails (status int))
+ (define-call "wstopsig" int never-fails (status int))
+ #+nil ; see alien/waitpid-macros.c
+ (define-call "wifcontinued" boolean never-fails (status int)))
+
+;;; mmap, msync
+#-win32
+(progn
+ (define-call ("mmap" :options :largefile) sb-sys:system-area-pointer
+   (lambda (res)
+     (= (sb-sys:sap-int res) #.(1- (expt 2 sb-vm::n-machine-word-bits))))
+   (addr sap-or-nil) (length unsigned) (prot unsigned)
+   (flags unsigned) (fd file-descriptor) (offset off-t))
+
+ (define-call "munmap" int minusp
+   (start sb-sys:system-area-pointer) (length unsigned))
+
+(define-call "msync" int minusp
+  (addr sb-sys:system-area-pointer) (length unsigned) (flags int)))
+
+#-win32
 (define-call "getpagesize" int minusp)
+#+win32
+;;; KLUDGE: This could be taken from GetSystemInfo
+(export (defun getpagesize () 4096))
+
+;;; passwd database
+;; The docstrings are copied from the descriptions in SUSv3,
+;; where present.
+#-win32
+(define-protocol-class passwd alien-passwd ()
+  ((name :initarg :name :accessor passwd-name
+         :documentation "User's login name.")
+   ;; Note: SUSv3 doesn't require this member.
+   (passwd :initarg :passwd :accessor passwd-passwd
+           :documentation "The account's encrypted password.")
+   (uid :initarg :uid :accessor passwd-uid
+        :documentation "Numerical user ID.")
+   (gid :initarg :gid :accessor passwd-gid
+        :documentation "Numerical group ID.")
+   ;; Note: SUSv3 doesn't require this member.
+   (gecos :initarg :gecos :accessor passwd-gecos
+          :documentation "User's name or comment field.")
+   (dir :initarg :dir :accessor passwd-dir
+        :documentation "Initial working directory.")
+   (shell :initarg :shell :accessor passwd-shell
+          :documentation "Program to use as shell."))
+  (:documentation "Instances of this class represent entries in
+                   the system's user database."))
+
+(defmacro define-pw-call (name arg type)
+  #-win32
+  ;; FIXME: this isn't the documented way of doing this, surely?
+  (let ((lisp-name (intern (string-upcase name) :sb-posix)))
+    `(progn
+      (export ',lisp-name :sb-posix)
+      (declaim (inline ,lisp-name))
+      (defun ,lisp-name (,arg)
+        (let ((r (alien-funcall (extern-alien ,name ,type) ,arg)))
+          (if (null r)
+              r
+              (alien-to-passwd r)))))))
+
+(define-pw-call "getpwnam" login-name (function (* alien-passwd) c-string))
+(define-pw-call "getpwuid" uid (function (* alien-passwd) uid-t))
+
+;;; group database
+#-win32
+(define-protocol-class group alien-group ()
+  ((name :initarg :name :accessor group-name)
+   (passwd :initarg :passwd :accessor group-passwd)
+   (gid :initarg :gid :accessor group-gid)))
+
+(defmacro define-gr-call (name arg type)
+  #-win32
+  ;; FIXME: this isn't the documented way of doing this, surely?
+  (let ((lisp-name (intern (string-upcase name) :sb-posix)))
+    `(progn
+      (export ',lisp-name :sb-posix)
+      (declaim (inline ,lisp-name))
+      (defun ,lisp-name (,arg)
+        (let ((r (alien-funcall (extern-alien ,name ,type) ,arg)))
+          (if (null r)
+              r
+              (alien-to-group r)))))))
+
+(define-gr-call "getgrnam" login-name (function (* alien-group) c-string))
+(define-gr-call "getgrgid" gid (function (* alien-group) gid-t))
+
+
+#-win32
+(define-protocol-class timeval alien-timeval ()
+  ((sec :initarg :tv-sec :accessor timeval-sec
+        :documentation "Seconds.")
+   (usec :initarg :tv-usec :accessor timeval-usec
+         :documentation "Microseconds."))
+  (:documentation "Instances of this class represent time values."))
+
+(define-protocol-class stat alien-stat ()
+  ((mode :initarg :mode :reader stat-mode
+         :documentation "Mode of file.")
+   (ino :initarg :ino :reader stat-ino
+        :documentation "File serial number.")
+   (dev :initarg :dev :reader stat-dev
+        :documentation "Device ID of device containing file.")
+   (nlink :initarg :nlink :reader stat-nlink
+          :documentation "Number of hard links to the file.")
+   (uid :initarg :uid :reader stat-uid
+        :documentation "User ID of file.")
+   (gid :initarg :gid :reader stat-gid
+        :documentation "Group ID of file.")
+   (size :initarg :size :reader stat-size
+         :documentation "For regular files, the file size in
+                         bytes.  For symbolic links, the length
+                         in bytes of the filename contained in
+                         the symbolic link.")
+   (atime :initarg :atime :reader stat-atime
+          :documentation "Time of last access.")
+   (mtime :initarg :mtime :reader stat-mtime
+          :documentation "Time of last data modification.")
+   (ctime :initarg :ctime :reader stat-ctime
+          :documentation "Time of last status change"))
+  (:documentation "Instances of this class represent Posix file
+                   metadata."))
+
+(defmacro define-stat-call (name arg designator-fun type)
+  ;; FIXME: this isn't the documented way of doing this, surely?
+  (let ((lisp-name (lisp-for-c-symbol name)))
+    `(progn
+      (export ',lisp-name :sb-posix)
+      (declaim (inline ,lisp-name))
+      (defun ,lisp-name (,arg &optional stat)
+        (declare (type (or null stat) stat))
+        (with-alien-stat a-stat ()
+          (let ((r (alien-funcall
+                    (extern-alien ,(real-c-name (list name :options :largefile)) ,type)
+                    (,designator-fun ,arg)
+                    a-stat)))
+            (when (minusp r)
+              (syscall-error))
+            (alien-to-stat a-stat stat)))))))
+
+(define-stat-call #-win32 "stat" #+win32 "_stat"
+                  pathname filename
+                  (function int c-string (* alien-stat)))
+
+#-win32
+(define-stat-call "lstat"
+                  pathname filename
+                  (function int c-string (* alien-stat)))
+;;; No symbolic links on Windows, so use stat
+#+win32
+(progn
+  (declaim (inline lstat))
+  (export (defun lstat (filename &optional stat)
+            (if stat (stat filename stat) (stat filename)))))
+
+(define-stat-call #-win32 "fstat" #+win32 "_fstat"
+                  fd file-descriptor
+                  (function int int (* alien-stat)))
+
+
+;;; mode flags
+(define-call "s_isreg" boolean never-fails (mode mode-t))
+(define-call "s_isdir" boolean never-fails (mode mode-t))
+(define-call "s_ischr" boolean never-fails (mode mode-t))
+(define-call "s_isblk" boolean never-fails (mode mode-t))
+(define-call "s_isfifo" boolean never-fails (mode mode-t))
+(define-call "s_islnk" boolean never-fails (mode mode-t))
+(define-call "s_issock" boolean never-fails (mode mode-t))
+
+#-win32
+(progn
+ (export 'pipe :sb-posix)
+ (declaim (inline pipe))
+ (defun pipe (&optional filedes2)
+   (declare (type (or null (simple-array (signed-byte 32) (2))) filedes2))
+   (unless filedes2
+     (setq filedes2 (make-array 2 :element-type '(signed-byte 32))))
+   (let ((r (sb-sys:with-pinned-objects (filedes2)
+              (alien-funcall
+               ;; FIXME: (* INT)?  (ARRAY INT 2) would be better
+               (extern-alien "pipe" (function int (* int)))
+               (sb-sys:vector-sap filedes2)))))
+     (when (minusp r)
+       (syscall-error)))
+   (values (aref filedes2 0) (aref filedes2 1))))
+
+#-win32
+(define-protocol-class termios alien-termios ()
+  ((iflag :initarg :iflag :accessor sb-posix:termios-iflag
+          :documentation "Input modes.")
+   (oflag :initarg :oflag :accessor sb-posix:termios-oflag
+          :documentation "Output modes.")
+   (cflag :initarg :cflag :accessor sb-posix:termios-cflag
+          :documentation "Control modes.")
+   (lflag :initarg :lflag :accessor sb-posix:termios-lflag
+          :documentation "Local modes.")
+   (cc :initarg :cc :accessor sb-posix:termios-cc :array-length nccs
+       :documentation "Control characters"))
+  (:documentation "Instances of this class represent I/O
+                   characteristics of the terminal."))
+
+#-win32
+(progn
+ (export 'tcsetattr :sb-posix)
+ (declaim (inline tcsetattr))
+ (defun tcsetattr (fd actions termios)
+   (declare (type termios termios))
+   (with-alien-termios a-termios ()
+     (termios-to-alien termios a-termios)
+     (let ((fd (file-descriptor fd)))
+       (let* ((r (alien-funcall
+                  (extern-alien
+                   "tcsetattr"
+                   (function int int int (* alien-termios)))
+                  fd actions a-termios)))
+         (when (minusp r)
+           (syscall-error)))
+       (values))))
+ (export 'tcgetattr :sb-posix)
+ (declaim (inline tcgetattr))
+ (defun tcgetattr (fd &optional termios)
+   (declare (type (or null termios) termios))
+   (with-alien-termios a-termios ()
+     (let ((r (alien-funcall
+               (extern-alien "tcgetattr"
+                             (function int int (* alien-termios)))
+               (file-descriptor fd)
+               a-termios)))
+       (when (minusp r)
+         (syscall-error))
+       (setf termios (alien-to-termios a-termios termios))))
+   termios)
+ (export 'cfsetispeed :sb-posix)
+ (declaim (inline cfsetispeed))
+ (defun cfsetispeed (speed &optional termios)
+   (declare (type (or null termios) termios))
+   (with-alien-termios a-termios ()
+     (let ((r (alien-funcall
+               (extern-alien "cfsetispeed"
+                             (function int (* alien-termios) speed-t))
+               a-termios
+               speed)))
+       (when (minusp r)
+         (syscall-error))
+       (setf termios (alien-to-termios a-termios termios))))
+   termios)
+ (export 'cfsetospeed :sb-posix)
+ (declaim (inline cfsetospeed))
+ (defun cfsetospeed (speed &optional termios)
+   (declare (type (or null termios) termios))
+   (with-alien-termios a-termios ()
+     (let ((r (alien-funcall
+               (extern-alien "cfsetospeed"
+                             (function int (* alien-termios) speed-t))
+               a-termios
+               speed)))
+       (when (minusp r)
+         (syscall-error))
+       (setf termios (alien-to-termios a-termios termios))))
+   termios)
+ (export 'cfgetispeed :sb-posix)
+ (declaim (inline cfgetispeed))
+ (defun cfgetispeed (termios)
+   (declare (type termios termios))
+   (with-alien-termios a-termios ()
+     (termios-to-alien termios a-termios)
+     (alien-funcall (extern-alien "cfgetispeed"
+                                  (function speed-t (* alien-termios)))
+                    a-termios)))
+ (export 'cfgetospeed :sb-posix)
+ (declaim (inline cfgetospeed))
+ (defun cfgetospeed (termios)
+   (declare (type termios termios))
+   (with-alien-termios a-termios ()
+     (termios-to-alien termios a-termios)
+     (alien-funcall (extern-alien "cfgetospeed"
+                                 (function speed-t (* alien-termios)))
+                    a-termios))))
+
+
+#-win32
+(progn
+  (export 'time :sb-posix)
+  (defun time ()
+    (let ((result (alien-funcall (extern-alien "time"
+                                               (function time-t (* time-t)))
+                                 nil)))
+      (if (minusp result)
+          (syscall-error)
+          result)))
+  (export 'utime :sb-posix)
+  (defun utime (filename &optional access-time modification-time)
+    (let ((fun (extern-alien "utime" (function int c-string
+                                               (* alien-utimbuf))))
+          (name (filename filename)))
+      (if (not (and access-time modification-time))
+          (alien-funcall fun name nil)
+          (with-alien ((utimbuf (struct alien-utimbuf)))
+            (setf (slot utimbuf 'actime) (or access-time 0)
+                  (slot utimbuf 'modtime) (or modification-time 0))
+            (let ((result (alien-funcall fun name (alien-sap utimbuf))))
+              (if (minusp result)
+                  (syscall-error)
+                  result))))))
+  (export 'utimes :sb-posix)
+  (defun utimes (filename &optional access-time modification-time)
+    (flet ((seconds-and-useconds (time)
+             (multiple-value-bind (integer fractional)
+                 (cl:truncate time)
+               (values integer (cl:truncate (* fractional 1000000)))))
+           (maybe-syscall-error (value)
+             (if (minusp value)
+                 (syscall-error)
+                 value)))
+      (let ((fun (extern-alien "utimes" (function int c-string
+                                                  (* (array alien-timeval 2)))))
+            (name (filename filename)))
+        (if (not (and access-time modification-time))
+            (maybe-syscall-error (alien-funcall fun name nil))
+            (with-alien ((buf (array alien-timeval 2)))
+              (let ((actime (deref buf 0))
+                    (modtime (deref buf 1)))
+                (setf (values (slot actime 'sec)
+                              (slot actime 'usec))
+                      (seconds-and-useconds (or access-time 0))
+                      (values (slot modtime 'sec)
+                              (slot modtime 'usec))
+                      (seconds-and-useconds (or modification-time 0)))
+                (maybe-syscall-error (alien-funcall fun name
+                                                    (alien-sap buf))))))))))
+
+
+;;; environment
+
+(export 'getenv :sb-posix)
+(defun getenv (name)
+  (let ((r (alien-funcall
+            (extern-alien "getenv" (function (* char) c-string))
+            name)))
+    (declare (type (alien (* char)) r))
+    (unless (null-alien r)
+      (cast r c-string))))
+(define-call "putenv" int minusp (string c-string))
 
+;;; syslog
+#-win32
+(progn
+  (export 'openlog :sb-posix)
+  (export 'syslog :sb-posix)
+  (export 'closelog :sb-posix)
+  (defun openlog (ident options &optional (facility log-user))
+    (alien-funcall (extern-alien
+                    "openlog" (function void c-string int int))
+                   ident options facility))
+  (defun syslog (priority format &rest args)
+    "Send a message to the syslog facility, with severity level
+PRIORITY.  The message will be formatted as by CL:FORMAT (rather
+than C's printf) with format string FORMAT and arguments ARGS."
+    (flet ((syslog1 (priority message)
+             (alien-funcall (extern-alien
+                             "syslog" (function void int c-string c-string))
+                            priority "%s" message)))
+      (syslog1 priority (apply #'format nil format args))))
+  (define-call "closelog" void never-fails))