1 (cl:in-package :sb-posix)
3 (defmacro define-protocol-class
4 (name alien-type superclasses slots &rest options)
5 (let ((to-protocol (intern (format nil "ALIEN-TO-~A" name)))
6 (to-alien (intern (format nil "~A-TO-ALIEN" name))))
8 (export ',name :sb-posix)
9 (defclass ,name ,superclasses
10 ,(loop for slotd in slots
11 ;; KLUDGE: Splice out :ARRAY-LENGTH options (they're
12 ;; for the conversion functions, not for DEFCLASS).
13 for array-length-option = (member :array-length slotd)
14 collect (append (ldiff slotd array-length-option)
15 (cddr array-length-option)))
17 (declaim (inline ,to-alien ,to-protocol))
18 (declaim (inline ,to-protocol ,to-alien))
19 (defun ,to-protocol (alien &optional instance)
20 (declare (type (sb-alien:alien (* ,alien-type)) alien)
21 (type (or null ,name) instance))
23 (setf instance (make-instance ',name)))
24 ,@(loop for slotd in slots
25 ;; FIXME: slotds in source are more complicated in general
27 ;; FIXME: baroque construction of intricate fragility
28 for array-length = (getf (cdr slotd) :array-length)
31 (let ((array (make-array ,array-length)))
32 (setf (slot-value instance ',(car slotd))
34 (dotimes (i ,array-length)
37 (sb-alien:slot alien ',(car slotd))
40 collect `(setf (slot-value instance ',(car slotd))
41 (sb-alien:slot alien ',(car slotd))))
43 (defun ,to-alien (instance &optional alien)
44 (declare (type (or null (sb-alien:alien (* ,alien-type))) alien)
45 (type ,name instance))
47 (setf alien (sb-alien:make-alien ,alien-type)))
48 ,@(loop for slotd in slots
49 for array-length = (getf (cdr slotd) :array-length)
52 (let ((array (slot-value instance ',(car slotd))))
53 (dotimes (i ,array-length)
55 (sb-alien:slot alien ',(car slotd))
59 collect `(setf (sb-alien:slot alien ',(car slotd))
60 (slot-value instance ',(car slotd)))))
61 (find-class ',name))))
63 (define-condition sb-posix:syscall-error (error)
64 ((errno :initarg :errno :reader sb-posix:syscall-errno)
65 (name :initarg :name :initform nil :reader sb-posix:syscall-name))
66 (:report (lambda (c s)
67 (let ((errno (sb-posix:syscall-errno c))
68 (name (sb-posix:syscall-name c)))
70 (format s "Error in ~S: ~A (~A)"
72 (sb-int:strerror errno)
74 (format s "Error in syscall: ~A (~A)"
75 (sb-int:strerror errno)
78 (declaim (ftype (function (&optional symbol) nil) syscall-error))
79 (defun syscall-error (&optional name)
80 (error 'sb-posix:syscall-error
84 (defun unsupported-error (lisp-name c-name)
85 (error "~S is unsupported by SBCL on this platform due to lack of ~A()."
88 (defun unsupported-warning (lisp-name c-name)
89 (warn "~S is unsupported by SBCL on this platform due to lack of ~A()."
92 (declaim (inline never-fails))
93 (defun never-fails (&rest args)
94 (declare (ignore args))
97 ;;; Some systems may need C-level wrappers, which can live in the
98 ;;; runtime (so that save-lisp-and-die can produce standalone
99 ;;; executables). See REAL-C-NAME in macros.lisp for the use of this
101 (eval-when (:compile-toplevel :load-toplevel)
102 (setf *c-functions-in-runtime*
103 '`(#+netbsd ,@("stat" "lstat" "fstat" "readdir" "opendir"))))
106 ;;; filesystem access
107 (defmacro define-call* (name &rest arguments)
108 #-win32 `(define-call ,name ,@arguments)
109 #+win32 `(define-call ,(if (consp name)
110 `(,(concatenate 'string "_" (car name))
112 (concatenate 'string "_" name))
115 (define-call* "access" int minusp (pathname filename) (mode int))
116 (define-call* "chdir" int minusp (pathname filename))
117 (define-call* "chmod" int minusp (pathname filename) (mode mode-t))
118 (define-call* "close" int minusp (fd file-descriptor))
119 (define-call* "creat" int minusp (pathname filename) (mode mode-t))
120 (define-call* "dup" int minusp (oldfd file-descriptor))
121 (define-call* "dup2" int minusp (oldfd file-descriptor)
122 (newfd file-descriptor))
123 (define-call* ("lseek" :options :largefile)
124 off-t minusp (fd file-descriptor) (offset off-t)
126 (define-call* "mkdir" int minusp (pathname filename) (mode mode-t))
129 (define-call-internally open-with-mode ,x int minusp
130 (pathname filename) (flags int) (mode mode-t))
131 (define-call-internally open-without-mode ,x int minusp
132 (pathname filename) (flags int))
133 (define-entry-point ,x
134 (pathname flags &optional (mode nil mode-supplied))
136 (open-with-mode pathname flags mode)
137 (open-without-mode pathname flags))))))
138 (def #-win32 "open" #+win32 "_open"))
139 (define-call* "read" int minusp
140 (fd file-descriptor) (buf (* t)) (count int))
141 (define-call "rename" int minusp (oldpath filename) (newpath filename))
142 (define-call* "rmdir" int minusp (pathname filename))
143 (define-call* "unlink" int minusp (pathname filename))
144 (define-call #-netbsd "opendir" #+netbsd "_opendir"
145 (* t) null-alien (pathname filename))
146 (define-call* "write" int minusp
147 (fd file-descriptor) (buf (* t)) (count int))
149 (define-call ("readdir" :c-name "readdir$INODE64" :options :largefile)
151 ;; readdir() has the worst error convention in the world. It's just
152 ;; too painful to support. (return is NULL _and_ errno "unchanged"
153 ;; is not an error, it's EOF).
157 (define-call (#-netbsd "readdir" #+netbsd "_readdir" :options :largefile)
159 ;; readdir() has the worst error convention in the world. It's just
160 ;; too painful to support. (return is NULL _and_ errno "unchanged"
161 ;; is not an error, it's EOF).
164 (define-call "closedir" int minusp (dir (* t)))
165 ;; need to do this here because we can't do it in the DEFPACKAGE
166 (define-call* "umask" mode-t never-fails (mode mode-t))
167 (define-call* "getpid" pid-t never-fails)
171 (define-call "chown" int minusp (pathname filename)
172 (owner uid-t) (group gid-t))
173 (define-call "chroot" int minusp (pathname filename))
174 (define-call "fchdir" int minusp (fd file-descriptor))
175 (define-call "fchmod" int minusp (fd file-descriptor) (mode mode-t))
176 (define-call "fchown" int minusp (fd file-descriptor)
177 (owner uid-t) (group gid-t))
178 (define-call "fdatasync" int minusp (fd file-descriptor))
179 (define-call ("ftruncate" :options :largefile)
180 int minusp (fd file-descriptor) (length off-t))
181 (define-call "fsync" int minusp (fd file-descriptor))
182 (define-call "lchown" int minusp (pathname filename)
183 (owner uid-t) (group gid-t))
184 (define-call "link" int minusp (oldpath filename) (newpath filename))
185 (define-call "lockf" int minusp (fd file-descriptor) (cmd int) (len off-t))
186 (define-call "mkfifo" int minusp (pathname filename) (mode mode-t))
187 (define-call "symlink" int minusp (oldpath filename) (newpath filename))
188 (define-call "sync" void never-fails)
189 (define-call ("truncate" :options :largefile)
190 int minusp (pathname filename) (length off-t))
192 (macrolet ((def-mk*temp (lisp-name c-name result-type errorp dirp values)
193 (declare (ignore dirp))
194 (if (sb-sys:find-foreign-symbol-address c-name)
196 (defun ,lisp-name (template)
197 (let* ((external-format sb-alien::*default-c-string-external-format*)
198 (arg (sb-ext:string-to-octets
200 :external-format external-format
202 (sb-sys:with-pinned-objects (arg)
203 ;; accommodate for the call-by-reference
204 ;; nature of mks/dtemp's template strings.
205 (let ((result (alien-funcall (extern-alien ,c-name
206 (function ,result-type system-area-pointer))
207 (sb-alien::vector-sap arg))))
208 (when (,errorp result)
209 (syscall-error ',lisp-name))
210 ;; FIXME: We'd rather return pathnames, but other
211 ;; SB-POSIX functions like this return strings...
212 (let ((pathname (sb-ext:octets-to-string
213 arg :external-format external-format
214 :end (1- (length arg)))))
216 '(values result pathname)
218 (export ',lisp-name))
220 (defun ,lisp-name (template)
221 (declare (ignore template))
222 (unsupported-error ',lisp-name ,c-name))
223 (define-compiler-macro ,lisp-name (&whole form template)
224 (declare (ignore template))
225 (unsupported-warning ',lisp-name ,c-name)
227 (export ',lisp-name)))))
228 (def-mk*temp mktemp "mktemp" (* char) null-alien nil nil)
229 ;; FIXME: Windows does have _mktemp, which has a slightly different
231 (def-mk*temp mkstemp "mkstemp" int minusp nil t)
232 ;; FIXME: What about Windows?
233 (def-mk*temp mkdtemp "mkdtemp" (* char) null-alien t nil))
234 (define-call-internally ioctl-without-arg "ioctl" int minusp
235 (fd file-descriptor) (cmd int))
236 (define-call-internally ioctl-with-int-arg "ioctl" int minusp
237 (fd file-descriptor) (cmd int) (arg int))
238 (define-call-internally ioctl-with-pointer-arg "ioctl" int minusp
239 (fd file-descriptor) (cmd int)
240 (arg alien-pointer-to-anything-or-nil))
241 (define-entry-point "ioctl" (fd cmd &optional (arg nil argp))
244 ((alien int) (ioctl-with-int-arg fd cmd arg))
245 ((or (alien (* t)) null) (ioctl-with-pointer-arg fd cmd arg)))
246 (ioctl-without-arg fd cmd)))
247 (define-call-internally fcntl-without-arg "fcntl" int minusp
248 (fd file-descriptor) (cmd int))
249 (define-call-internally fcntl-with-int-arg "fcntl" int minusp
250 (fd file-descriptor) (cmd int) (arg int))
251 (define-call-internally fcntl-with-pointer-arg "fcntl" int minusp
252 (fd file-descriptor) (cmd int)
253 (arg alien-pointer-to-anything-or-nil))
254 (define-protocol-class flock alien-flock ()
255 ((type :initarg :type :accessor flock-type
256 :documentation "Type of lock; F_RDLCK, F_WRLCK, F_UNLCK.")
257 (whence :initarg :whence :accessor flock-whence
258 :documentation "Flag for starting offset.")
259 (start :initarg :start :accessor flock-start
260 :documentation "Relative offset in bytes.")
261 (len :initarg :len :accessor flock-len
262 :documentation "Size; if 0 then until EOF.")
263 ;; Note: PID isn't initable, and is read-only. But other stuff in
264 ;; SB-POSIX right now loses when a protocol-class slot is unbound,
265 ;; so we initialize it to 0.
266 (pid :initform 0 :reader flock-pid
268 "Process ID of the process holding the lock; returned with F_GETLK."))
269 (:documentation "Class representing locks used in fcntl(2)."))
270 (define-entry-point "fcntl" (fd cmd &optional (arg nil argp))
273 ((alien int) (fcntl-with-int-arg fd cmd arg))
274 ((or (alien (* t)) null) (fcntl-with-pointer-arg fd cmd arg))
275 (flock (with-alien-flock a-flock ()
276 (flock-to-alien arg a-flock)
277 (let ((r (fcntl-with-pointer-arg fd cmd a-flock)))
278 (alien-to-flock a-flock arg)
280 (fcntl-without-arg fd cmd)))
283 (define-call "geteuid" uid-t never-fails) ; "always successful", it says
284 #-sunos (define-call "getresuid" uid-t never-fails)
285 (define-call "getuid" uid-t never-fails)
286 (define-call "seteuid" int minusp (uid uid-t))
287 #-sunos (define-call "setfsuid" int minusp (uid uid-t))
288 (define-call "setreuid" int minusp (ruid uid-t) (euid uid-t))
289 #-sunos (define-call "setresuid" int minusp (ruid uid-t) (euid uid-t) (suid uid-t))
290 (define-call "setuid" int minusp (uid uid-t))
291 (define-call "getegid" gid-t never-fails)
292 (define-call "getgid" gid-t never-fails)
293 #-sunos (define-call "getresgid" gid-t never-fails)
294 (define-call "setegid" int minusp (gid gid-t))
295 #-sunos (define-call "setfsgid" int minusp (gid gid-t))
296 (define-call "setgid" int minusp (gid gid-t))
297 (define-call "setregid" int minusp (rgid gid-t) (egid gid-t))
298 #-sunos (define-call "setresgid" int minusp (rgid gid-t) (egid gid-t) (sgid gid-t))
300 ;; processes, signals
301 (define-call "alarm" int never-fails (seconds unsigned))
305 ;; FIXME this is a lie, of course this can fail, but there's no
306 ;; error handling here yet!
307 #+mach-exception-handler
308 (define-call "setup_mach_exceptions" void never-fails)
309 (define-call ("posix_fork" :c-name "fork") pid-t minusp)
311 "Forks the current process, returning 0 in the new process and the PID of
312 the child process in the parent. Forking while multiple threads are running is
315 (sb-thread::with-all-threads-lock
316 (when (cdr sb-thread::*all-threads*)
318 (let ((pid (posix-fork)))
319 #+mach-exception-handler
321 (setup-mach-exceptions))
322 (return-from fork pid)))
324 (error "Cannot fork with multiple threads running.")))
325 (export 'fork :sb-posix)
327 (define-call "getpgid" pid-t minusp (pid pid-t))
328 (define-call "getppid" pid-t never-fails)
329 (define-call "getpgrp" pid-t never-fails)
330 (define-call "getsid" pid-t minusp (pid pid-t))
331 (define-call "kill" int minusp (pid pid-t) (signal int))
332 (define-call "killpg" int minusp (pgrp int) (signal int))
333 (define-call "pause" int minusp)
334 (define-call "setpgid" int minusp (pid pid-t) (pgid pid-t))
335 (define-call "setpgrp" int minusp)
336 (define-call "setsid" pid-t minusp))
338 (defmacro with-growing-c-string ((buffer size) &body body)
339 (sb-int:with-unique-names (c-string-block)
340 `(block ,c-string-block
342 (flet ((,buffer (&optional (size-incl-null))
344 (setf (sb-sys:sap-ref-8 (sb-alien:alien-sap ,buffer) size-incl-null)
346 (return-from ,c-string-block
347 (sb-alien::c-string-to-string
348 (sb-alien:alien-sap ,buffer)
349 (sb-impl::default-external-format)
351 (loop for ,size = 128 then (* 2 ,size)
354 (setf ,buffer (make-alien c-string ,size))
357 (free-alien ,buffer)))))))))
361 (export 'readlink :sb-posix)
362 (defun readlink (pathspec)
363 "Returns the resolved target of a symbolic link as a string."
364 (flet ((%readlink (path buf length)
366 (extern-alien "readlink" (function int (c-string :not-null t) (* t) int))
368 (with-growing-c-string (buf size)
369 (let ((count (%readlink (filename pathspec) buf size)))
370 (cond ((minusp count)
371 (syscall-error 'readlink))
376 (export 'getcwd :sb-posix)
378 "Returns the process's current working directory as a string."
379 (flet ((%getcwd (buffer size)
381 (extern-alien #-win32 "getcwd"
382 #+win32 "_getcwd" (function c-string (* t) int))
384 (with-growing-c-string (buf size)
385 (let ((result (%getcwd buf size)))
388 ((/= (get-errno) sb-posix:erange)
389 (syscall-error 'getcwd))))))))
393 (export 'wait :sb-posix)
394 (declaim (inline wait))
395 (defun wait (&optional statusptr)
396 (declare (type (or null (simple-array (signed-byte 32) (1))) statusptr))
397 (let* ((ptr (or statusptr (make-array 1 :element-type '(signed-byte 32))))
398 (pid (sb-sys:with-pinned-objects (ptr)
400 (extern-alien "wait" (function pid-t (* int)))
401 (sb-sys:vector-sap ptr)))))
403 (syscall-error 'wait)
404 (values pid (aref ptr 0))))))
408 (export 'waitpid :sb-posix)
409 (declaim (inline waitpid))
410 (defun waitpid (pid options &optional statusptr)
411 (declare (type (sb-alien:alien pid-t) pid)
412 (type (sb-alien:alien int) options)
413 (type (or null (simple-array (signed-byte 32) (1))) statusptr))
414 (let* ((ptr (or statusptr (make-array 1 :element-type '(signed-byte 32))))
415 (pid (sb-sys:with-pinned-objects (ptr)
417 (extern-alien "waitpid" (function pid-t
419 pid (sb-sys:vector-sap ptr) options))))
421 (syscall-error 'waitpid)
422 (values pid (aref ptr 0)))))
424 (define-call "wifexited" boolean never-fails (status int))
425 (define-call "wexitstatus" int never-fails (status int))
426 (define-call "wifsignaled" boolean never-fails (status int))
427 (define-call "wtermsig" int never-fails (status int))
428 (define-call "wifstopped" boolean never-fails (status int))
429 (define-call "wstopsig" int never-fails (status int))
430 #+nil ; see alien/waitpid-macros.c
431 (define-call "wifcontinued" boolean never-fails (status int)))
436 (define-call ("mmap" :options :largefile) sb-sys:system-area-pointer
438 (= (sb-sys:sap-int res) #.(1- (expt 2 sb-vm::n-machine-word-bits))))
439 (addr sap-or-nil) (length unsigned) (prot unsigned)
440 (flags unsigned) (fd file-descriptor) (offset off-t))
442 (define-call "munmap" int minusp
443 (start sb-sys:system-area-pointer) (length unsigned))
446 (define-call "msync" int minusp
447 (addr sb-sys:system-area-pointer) (length unsigned) (flags int)))
450 ;; No attempt is made to offer a full mmap-like interface on Windows.
451 ;; It would be possible to do so (and has been done by AK on his
452 ;; branch), but the use case is unclear to me. However, the following
453 ;; definitions are needed to keep existing code in sb-simple-streams
455 (defconstant PROT-READ #x02)
456 (defconstant PROT-WRITE #x04)
457 (defconstant PROT-EXEC #x10)
458 (defconstant PROT-NONE 0)
459 (defconstant MAP-SHARED 0)
460 (defconstant MAP-PRIVATE 1)
461 (defconstant MS-ASYNC nil)
462 (defconstant MS-SYNC nil)
463 (export ;export on the fly like define-call
464 (defun msync (address length flags)
465 (declare (ignore flags))
466 (when (zerop (sb-win32:flush-view-of-file address length))
467 (sb-win32::win32-error "FlushViewOfFile")))))
469 ;;; mlockall, munlockall
470 (define-call "mlockall" int minusp (flags int))
471 (define-call "munlockall" int minusp)
474 (define-call "getpagesize" int minusp)
476 ;;; KLUDGE: This could be taken from GetSystemInfo
477 (export (defun getpagesize () 4096))
480 ;; The docstrings are copied from the descriptions in SUSv3,
483 (define-protocol-class passwd alien-passwd ()
484 ((name :initarg :name :accessor passwd-name
485 :documentation "User's login name.")
486 ;; Note: SUSv3 doesn't require this member.
487 (passwd :initarg :passwd :accessor passwd-passwd
488 :documentation "The account's encrypted password.")
489 (uid :initarg :uid :accessor passwd-uid
490 :documentation "Numerical user ID.")
491 (gid :initarg :gid :accessor passwd-gid
492 :documentation "Numerical group ID.")
493 ;; Note: SUSv3 doesn't require this member.
494 (gecos :initarg :gecos :accessor passwd-gecos
495 :documentation "User's name or comment field.")
496 (dir :initarg :dir :accessor passwd-dir
497 :documentation "Initial working directory.")
498 (shell :initarg :shell :accessor passwd-shell
499 :documentation "Program to use as shell."))
500 (:documentation "Instances of this class represent entries in
501 the system's user database."))
505 (define-protocol-class group alien-group ()
506 ((name :initarg :name :accessor group-name)
507 (passwd :initarg :passwd :accessor group-passwd)
508 (gid :initarg :gid :accessor group-gid)))
510 (defmacro define-obj-call (name arg type conv)
512 ;; FIXME: this isn't the documented way of doing this, surely?
513 (let ((lisp-name (intern (string-upcase name) :sb-posix)))
515 (export ',lisp-name :sb-posix)
516 (declaim (inline ,lisp-name))
517 (defun ,lisp-name (,arg)
518 (let ((r (alien-funcall (extern-alien ,name ,type) ,arg)))
523 (define-obj-call "getpwnam" login-name (function (* alien-passwd) (c-string :not-null t))
525 (define-obj-call "getpwuid" uid (function (* alien-passwd) uid-t)
527 (define-obj-call "getgrnam" login-name (function (* alien-group) (c-string :not-null t))
529 (define-obj-call "getgrgid" gid (function (* alien-group) gid-t)
534 (define-protocol-class timeval alien-timeval ()
535 ((sec :initarg :tv-sec :accessor timeval-sec
536 :documentation "Seconds.")
537 (usec :initarg :tv-usec :accessor timeval-usec
538 :documentation "Microseconds."))
539 (:documentation "Instances of this class represent time values."))
541 (define-protocol-class stat alien-stat ()
542 ((mode :initarg :mode :reader stat-mode
543 :documentation "Mode of file.")
544 (ino :initarg :ino :reader stat-ino
545 :documentation "File serial number.")
546 (dev :initarg :dev :reader stat-dev
547 :documentation "Device ID of device containing file.")
548 (nlink :initarg :nlink :reader stat-nlink
549 :documentation "Number of hard links to the file.")
550 (uid :initarg :uid :reader stat-uid
551 :documentation "User ID of file.")
552 (gid :initarg :gid :reader stat-gid
553 :documentation "Group ID of file.")
554 (size :initarg :size :reader stat-size
555 :documentation "For regular files, the file size in
556 bytes. For symbolic links, the length
557 in bytes of the filename contained in
559 (rdev :initarg :rdev :reader stat-rdev
560 :documentation "For devices the device number.")
561 (atime :initarg :atime :reader stat-atime
562 :documentation "Time of last access.")
563 (mtime :initarg :mtime :reader stat-mtime
564 :documentation "Time of last data modification.")
565 (ctime :initarg :ctime :reader stat-ctime
566 :documentation "Time of last status change"))
567 (:documentation "Instances of this class represent Posix file
570 (defmacro define-stat-call (name arg designator-fun type)
571 ;; FIXME: this isn't the documented way of doing this, surely?
572 (let ((lisp-name (lisp-for-c-symbol name))
573 (real-name #+inode64 (format nil "~A$INODE64" name)
576 (export ',lisp-name :sb-posix)
577 (declaim (inline ,lisp-name))
578 (defun ,lisp-name (,arg &optional stat)
579 (declare (type (or null stat) stat))
580 (with-alien-stat a-stat ()
581 (let ((r (alien-funcall
582 (extern-alien ,(real-c-name (list real-name :options :largefile)) ,type)
583 (,designator-fun ,arg)
586 (syscall-error ',lisp-name))
587 (alien-to-stat a-stat stat)))))))
589 (define-stat-call #-win32 "stat" #+win32 "_stat"
591 (function int (c-string :not-null t) (* alien-stat)))
594 (define-stat-call "lstat"
596 (function int (c-string :not-null t) (* alien-stat)))
597 ;;; No symbolic links on Windows, so use stat
600 (declaim (inline lstat))
601 (export (defun lstat (filename &optional stat)
602 (if stat (stat filename stat) (stat filename)))))
604 (define-stat-call #-win32 "fstat" #+win32 "_fstat"
606 (function int int (* alien-stat)))
610 (define-call "s_isreg" boolean never-fails (mode mode-t))
611 (define-call "s_isdir" boolean never-fails (mode mode-t))
612 (define-call "s_ischr" boolean never-fails (mode mode-t))
613 (define-call "s_isblk" boolean never-fails (mode mode-t))
614 (define-call "s_isfifo" boolean never-fails (mode mode-t))
615 (define-call "s_islnk" boolean never-fails (mode mode-t))
616 (define-call "s_issock" boolean never-fails (mode mode-t))
620 (export 'pipe :sb-posix)
621 (declaim (inline pipe))
622 (defun pipe (&optional filedes2)
623 (declare (type (or null (simple-array (signed-byte 32) (2))) filedes2))
625 (setq filedes2 (make-array 2 :element-type '(signed-byte 32))))
626 (let ((r (sb-sys:with-pinned-objects (filedes2)
628 ;; FIXME: (* INT)? (ARRAY INT 2) would be better
629 (extern-alien "pipe" (function int (* int)))
630 (sb-sys:vector-sap filedes2)))))
632 (syscall-error 'pipe)))
633 (values (aref filedes2 0) (aref filedes2 1))))
636 (define-protocol-class termios alien-termios ()
637 ((iflag :initarg :iflag :accessor sb-posix:termios-iflag
638 :documentation "Input modes.")
639 (oflag :initarg :oflag :accessor sb-posix:termios-oflag
640 :documentation "Output modes.")
641 (cflag :initarg :cflag :accessor sb-posix:termios-cflag
642 :documentation "Control modes.")
643 (lflag :initarg :lflag :accessor sb-posix:termios-lflag
644 :documentation "Local modes.")
645 (cc :initarg :cc :accessor sb-posix:termios-cc :array-length nccs
646 :documentation "Control characters."))
647 (:documentation "Instances of this class represent I/O
648 characteristics of the terminal."))
652 (export 'tcsetattr :sb-posix)
653 (declaim (inline tcsetattr))
654 (defun tcsetattr (fd actions termios)
655 (declare (type termios termios))
656 (with-alien-termios a-termios ()
657 (termios-to-alien termios a-termios)
658 (let ((fd (file-descriptor fd)))
659 (let* ((r (alien-funcall
662 (function int int int (* alien-termios)))
663 fd actions a-termios)))
665 (syscall-error 'tcsetattr)))
667 (export 'tcgetattr :sb-posix)
668 (declaim (inline tcgetattr))
669 (defun tcgetattr (fd &optional termios)
670 (declare (type (or null termios) termios))
671 (with-alien-termios a-termios ()
672 (let ((r (alien-funcall
673 (extern-alien "tcgetattr"
674 (function int int (* alien-termios)))
678 (syscall-error 'tcgetattr))
679 (setf termios (alien-to-termios a-termios termios))))
681 (define-call "tcdrain" int minusp (fd file-descriptor))
682 (define-call "tcflow" int minusp (fd file-descriptor) (action int))
683 (define-call "tcflush" int minusp (fd file-descriptor) (queue-selector int))
684 (define-call "tcgetsid" pid-t minusp (fd file-descriptor))
685 (define-call "tcsendbreak" int minusp (fd file-descriptor) (duration int))
686 (export 'cfsetispeed :sb-posix)
687 (declaim (inline cfsetispeed))
688 (defun cfsetispeed (speed &optional termios)
689 (declare (type (or null termios) termios))
690 (with-alien-termios a-termios ()
691 (let ((r (alien-funcall
692 (extern-alien "cfsetispeed"
693 (function int (* alien-termios) speed-t))
697 (syscall-error 'cfsetispeed))
698 (setf termios (alien-to-termios a-termios termios))))
700 (export 'cfsetospeed :sb-posix)
701 (declaim (inline cfsetospeed))
702 (defun cfsetospeed (speed &optional termios)
703 (declare (type (or null termios) termios))
704 (with-alien-termios a-termios ()
705 (let ((r (alien-funcall
706 (extern-alien "cfsetospeed"
707 (function int (* alien-termios) speed-t))
711 (syscall-error 'cfsetospeed))
712 (setf termios (alien-to-termios a-termios termios))))
714 (export 'cfgetispeed :sb-posix)
715 (declaim (inline cfgetispeed))
716 (defun cfgetispeed (termios)
717 (declare (type termios termios))
718 (with-alien-termios a-termios ()
719 (termios-to-alien termios a-termios)
720 (alien-funcall (extern-alien "cfgetispeed"
721 (function speed-t (* alien-termios)))
723 (export 'cfgetospeed :sb-posix)
724 (declaim (inline cfgetospeed))
725 (defun cfgetospeed (termios)
726 (declare (type termios termios))
727 (with-alien-termios a-termios ()
728 (termios-to-alien termios a-termios)
729 (alien-funcall (extern-alien "cfgetospeed"
730 (function speed-t (* alien-termios)))
736 (export 'time :sb-posix)
738 (let ((result (alien-funcall (extern-alien "time"
739 (function time-t (* time-t)))
742 (syscall-error 'time)
744 (export 'utime :sb-posix)
745 (defun utime (filename &optional access-time modification-time)
746 (let ((fun (extern-alien "utime" (function int (c-string :not-null t)
748 (name (filename filename)))
749 (if (not (and access-time modification-time))
750 (alien-funcall fun name nil)
751 (with-alien ((utimbuf (struct alien-utimbuf)))
752 (setf (slot utimbuf 'actime) (or access-time 0)
753 (slot utimbuf 'modtime) (or modification-time 0))
754 (let ((result (alien-funcall fun name (alien-sap utimbuf))))
756 (syscall-error 'utime)
758 (export 'utimes :sb-posix)
759 (defun utimes (filename &optional access-time modification-time)
760 (flet ((seconds-and-useconds (time)
761 (multiple-value-bind (integer fractional)
763 (values integer (cl:truncate (* fractional 1000000)))))
764 (maybe-syscall-error (value)
766 (syscall-error 'utimes)
768 (let ((fun (extern-alien "utimes" (function int (c-string :not-null t)
769 (* (array alien-timeval 2)))))
770 (name (filename filename)))
771 (if (not (and access-time modification-time))
772 (maybe-syscall-error (alien-funcall fun name nil))
773 (with-alien ((buf (array alien-timeval 2)))
774 (let ((actime (deref buf 0))
775 (modtime (deref buf 1)))
776 (setf (values (slot actime 'sec)
778 (seconds-and-useconds (or access-time 0))
779 (values (slot modtime 'sec)
780 (slot modtime 'usec))
781 (seconds-and-useconds (or modification-time 0)))
782 (maybe-syscall-error (alien-funcall fun name
783 (alien-sap buf))))))))))
788 (eval-when (:compile-toplevel :load-toplevel)
789 ;; Do this at compile-time as Win32 code below refers to it as
791 (export 'getenv :sb-posix))
793 (let ((r (alien-funcall
794 (extern-alien "getenv" (function (* char) (c-string :not-null t)))
796 (declare (type (alien (* char)) r))
797 (unless (null-alien r)
801 (define-call "setenv" int minusp
802 (name (c-string :not-null t))
803 (value (c-string :not-null t))
805 (define-call "unsetenv" int minusp (name (c-string :not-null t)))
806 (export 'putenv :sb-posix)
807 (defun putenv (string)
808 (declare (string string))
809 ;; We don't want to call actual putenv: the string passed to putenv ends
810 ;; up in environ, and we any string we allocate GC might move.
812 ;; This makes our wrapper nonconformant if you squit hard enough, but
813 ;; users who care about that should really be calling putenv() directly in
814 ;; order to be able to manage memory sanely.
815 (let ((p (position #\= string))
819 (unsetenv (subseq string 0 p))
820 (setenv (subseq string 0 p) (subseq string (1+ p)) 1))
821 (error "Invalid argument to putenv: ~S" string)))))
824 ;; Windows doesn't define a POSIX setenv, but happily their _putenv is sane.
825 (define-call* "putenv" int minusp (string (c-string :not-null t)))
826 (export 'setenv :sb-posix)
827 (defun setenv (name value overwrite)
828 (declare (string name value))
829 (if (and (zerop overwrite) (sb-posix:getenv name))
831 (putenv (concatenate 'string name "=" value))))
832 (export 'unsetenv :sb-posix)
833 (defun unsetenv (name)
834 (declare (string name))
835 (putenv (concatenate 'string name "="))))
840 (export 'openlog :sb-posix)
841 (export 'syslog :sb-posix)
842 (export 'closelog :sb-posix)
843 (defun openlog (ident options &optional (facility log-user))
844 (alien-funcall (extern-alien
845 "openlog" (function void (c-string :not-null t) int int))
846 ident options facility))
847 (defun syslog (priority format &rest args)
848 "Send a message to the syslog facility, with severity level
849 PRIORITY. The message will be formatted as by CL:FORMAT (rather
850 than C's printf) with format string FORMAT and arguments ARGS."
851 (flet ((syslog1 (priority message)
852 (alien-funcall (extern-alien
853 "syslog" (function void int
854 (c-string :not-null t)
855 (c-string :not-null t)))
856 priority "%s" message)))
857 (syslog1 priority (apply #'format nil format args))))
858 (define-call "closelog" void never-fails))