(/show0 "unix.lisp 21")
-;;;; common machine-independent stuff
-
-(eval-when (:compile-toplevel :execute)
-
-(defparameter *compiler-unix-errors* nil)
-
-(/show0 "unix.lisp 29")
-
-(sb!xc:defmacro def-unix-error (name number description)
- `(progn
- (defconstant ,name ,number ,description)
- (eval-when (:compile-toplevel :execute)
- (push (cons ,number ,description) *compiler-unix-errors*))))
-
-(sb!xc:defmacro emit-unix-errors ()
- (let* ((max (apply #'max (mapcar #'car *compiler-unix-errors*)))
- (array (make-array (1+ max) :initial-element nil)))
- (dolist (error *compiler-unix-errors*)
- (setf (svref array (car error)) (cdr error)))
- `(progn
- (defvar *unix-errors* ',array)
- (proclaim '(simple-vector *unix-errors*)))))
-
-) ; EVAL-WHEN
-
-;;; FIXME: Couldn't all the *UNIX-ERRORS*/*COMPILER-UNIX-ERRORS* cruft
-;;; be replaced by POSIX strerror(3)?
-(defvar *unix-errors*)
-
-(/show0 "unix.lisp 52")
-
(defmacro def-enum (inc cur &rest names)
(flet ((defform (name)
- (prog1 (when name `(defconstant ,name ,cur))
- (setf cur (funcall inc cur 1)))))
+ (prog1 (when name `(defconstant ,name ,cur))
+ (setf cur (funcall inc cur 1)))))
`(progn ,@(mapcar #'defform names))))
;;; Given a C-level zero-terminated array of C strings, return a
(dotimes (i most-positive-fixnum (error "argh! can't happen"))
(declare (type index i))
(let ((c-string (deref c-strings i)))
- (if c-string
+ (if c-string
(push c-string reversed-result)
- (return (nreverse reversed-result)))))))
+ (return (nreverse reversed-result)))))))
\f
;;;; Lisp types used by syscalls
(/show0 "unix.lisp 74")
-(defun get-unix-error-msg (&optional (error-number (get-errno)))
- #!+sb-doc
- "Returns a string describing the error number which was returned by a
- UNIX system call."
- (declare (type integer error-number))
- (if (array-in-bounds-p *unix-errors* error-number)
- (svref *unix-errors* error-number)
- (format nil "unknown error [~D]" error-number)))
-
;;; FIXME: The various FOO-SYSCALL-BAR macros, and perhaps some other
;;; macros in this file, are only used in this file, and could be
;;; implemented using SB!XC:DEFMACRO wrapped in EVAL-WHEN.
(defmacro syscall ((name &rest arg-types) success-form &rest args)
- `(let ((result (alien-funcall (extern-alien ,name (function int ,@arg-types))
- ,@args)))
- (if (minusp result)
- (values nil (get-errno))
- ,success-form)))
+ `(locally
+ (declare (optimize (sb!c::float-accuracy 0)))
+ (let ((result (alien-funcall (extern-alien ,name (function int ,@arg-types))
+ ,@args)))
+ (if (minusp result)
+ (values nil (get-errno))
+ ,success-form))))
;;; This is like SYSCALL, but if it fails, signal an error instead of
;;; returning error codes. Should only be used for syscalls that will
;;; never really get an error.
(defmacro syscall* ((name &rest arg-types) success-form &rest args)
- `(let ((result (alien-funcall (extern-alien ,name (function int ,@arg-types))
- ,@args)))
- (if (minusp result)
- (error "Syscall ~A failed: ~A" ,name (get-unix-error-msg))
- ,success-form)))
+ `(locally
+ (declare (optimize (sb!c::float-accuracy 0)))
+ (let ((result (alien-funcall (extern-alien ,name (function int ,@arg-types))
+ ,@args)))
+ (if (minusp result)
+ (error "Syscall ~A failed: ~A" ,name (strerror))
+ ,success-form))))
(/show0 "unix.lisp 109")
(defmacro int-syscall ((name &rest arg-types) &rest args)
`(syscall (,name ,@arg-types) (values result 0) ,@args))
+
+(defmacro with-restarted-syscall ((&optional (value (gensym))
+ (errno (gensym)))
+ syscall-form &rest body)
+ #!+sb-doc
+ "Evaluate BODY with VALUE and ERRNO bound to the return values of
+SYSCALL-FORM. Repeat evaluation of SYSCALL-FORM if it is interrupted."
+ `(let (,value ,errno)
+ (loop (multiple-value-setq (,value ,errno)
+ ,syscall-form)
+ (unless #!-win32 (eql ,errno sb!unix:eintr) #!+win32 nil
+ (return (values ,value ,errno))))
+ ,@body))
+
+#!+win32
+(progn
+ (defconstant espipe 29)
+ ;; For stat-wrapper hack (different-type or non-existing win32 fields).
+ (define-alien-type nlink-t short)
+ (define-alien-type uid-t short)
+ (define-alien-type gid-t short))
\f
;;;; hacking the Unix environment
-(def-alien-routine ("getenv" posix-getenv) c-string
- "Return the environment string \"name=value\" which corresponds to NAME, or
- NIL if there is none."
+#!-win32
+(define-alien-routine ("getenv" posix-getenv) c-string
+ "Return the \"value\" part of the environment string \"name=value\" which
+ corresponds to NAME, or NIL if there is none."
(name c-string))
\f
;;; from stdio.h
;;; Rename the file with string NAME1 to the string NAME2. NIL and an
;;; error code is returned if an error occurs.
+#!-win32
(defun unix-rename (name1 name2)
(declare (type unix-pathname name1 name2))
(void-syscall ("rename" c-string c-string) name1 name2))
(/show0 "unix.lisp 220")
-;;; FIXME: Isn't there some way to use a C wrapper to avoid this hand-copying?
-(defconstant +max-s-long+ 2147483647)
-(defconstant +max-u-long+ 4294967295)
-(def-alien-type quad-t #+nil long-long #-nil (array long 2))
-(def-alien-type uquad-t #+nil unsigned-long-long
- #-nil (array unsigned-long 2))
-(def-alien-type qaddr-t (* quad-t))
-(def-alien-type daddr-t int)
-(def-alien-type caddr-t (* char))
-(def-alien-type swblk-t long)
-(def-alien-type size-t unsigned-int)
-(def-alien-type time-t long)
-(def-alien-type clock-t
- #!+linux long
- #!+bsd unsigned-long)
-(def-alien-type uid-t unsigned-int)
-(def-alien-type ssize-t int)
-
-;;; FIXME: We shouldn't hand-copy types from header files into Lisp like this
-;;; unless we have extreme provocation. Reading directories is not extreme
-;;; enough, since it doesn't need to be blindingly fast: we can just implement
-;;; those functions in C as a wrapper layer.
-(def-alien-type fd-mask unsigned-long)
-
-;;; FIXME: Isn't there some way to use a C wrapper to avoid this hand-copying?
-(def-alien-type dev-t
- #!+linux uquad-t
- #!+bsd unsigned-int)
-(def-alien-type uid-t unsigned-int)
-(def-alien-type gid-t unsigned-int)
-(def-alien-type ino-t
- #!+linux unsigned-long
- #!+bsd unsigned-int)
-(def-alien-type mode-t
- #!+linux unsigned-int
- #!+bsd unsigned-short)
-(def-alien-type nlink-t
- #!+linux unsigned-int
- #!+bsd unsigned-short)
-(/show0 "unix.lisp 263")
-
-;;; FIXME: We shouldn't hand-copy types from header files into Lisp like this
-;;; unless we have extreme provocation. Reading directories is not extreme
-;;; enough, since it doesn't need to be blindingly fast: we can just implement
-;;; those functions in C as a wrapper layer.
-
-(def-alien-type off-t
- #!+linux long
- #!+bsd quad-t)
-
-(defconstant fd-setsize 1024)
-
-(def-alien-type nil
+;;; FIXME: We shouldn't hand-copy types from header files into Lisp
+;;; like this unless we have extreme provocation. Reading directories
+;;; is not extreme enough, since it doesn't need to be blindingly
+;;; fast: we can just implement those functions in C as a wrapper
+;;; layer.
+(define-alien-type fd-mask unsigned-long)
+
+(eval-when (:compile-toplevel :load-toplevel :execute)
+ (defconstant fd-setsize 1024))
+
+(define-alien-type nil
(struct fd-set
- (fds-bits (array fd-mask #.(/ fd-setsize 32)))))
-\f
-;;;; direntry.h
+ (fds-bits (array fd-mask #.(/ fd-setsize
+ sb!vm:n-machine-word-bits)))))
(/show0 "unix.lisp 304")
-
-(def-alien-type nil
- (struct direct
- (d-ino long); inode number of entry
- (d-off off-t) ; offset of next disk directory entry
- (d-reclen unsigned-short) ; length of this record
- (d_type unsigned-char)
- (d-name (array char 256)))) ; name must be no longer than this
-
-;;;; dirent.h
-
-;;;; FIXME: It might be really nice to implement these in C, so that
-;;;; we don't need to do horrible things like hand-copying the
-;;;; direntry struct slot types into an alien struct.
-
-
-;;; FIXME: DIRECTORY is an external symbol of package CL, so we should
-;;; use some other name for this low-level implementation type.
-(defstruct (directory (:copier nil))
- name
- (dir-struct (required-argument) :type system-area-pointer))
-(def!method print-object ((dir directory) stream)
- (print-unreadable-object (dir stream :type t)
- (prin1 (directory-name dir) stream)))
-
-(defun open-dir (pathname)
- (declare (type unix-pathname pathname))
- (when (string= pathname "")
- (setf pathname "."))
- (let ((kind (unix-file-kind pathname)))
- (case kind
- (:directory
- (let ((dir-struct
- (alien-funcall (extern-alien "opendir"
- (function system-area-pointer
- c-string))
- pathname)))
- (if (zerop (sap-int dir-struct))
- (values nil (get-errno))
- (make-directory :name pathname :dir-struct dir-struct))))
- ((nil)
- (values nil enoent))
- (t
- (values nil enotdir)))))
-
-(defun read-dir (dir)
- (declare (type directory dir))
- (let ((daddr (alien-funcall (extern-alien "readdir"
- (function system-area-pointer
- system-area-pointer))
- (directory-dir-struct dir))))
- (declare (type system-area-pointer daddr))
- (if (zerop (sap-int daddr))
- nil
- (with-alien ((direct (* (struct direct)) daddr))
- (values (cast (slot direct 'd-name) c-string)
- (slot direct 'd-ino))))))
-
-(defun close-dir (dir)
- (declare (type directory dir))
- (alien-funcall (extern-alien "closedir"
- (function void system-area-pointer))
- (directory-dir-struct dir))
- nil)
+\f
\f
;;;; fcntl.h
;;;;
-;;;; POSIX Standard: 6.5 File Control Operations <fcntl.h>
-
-(/show0 "unix.lisp 356")
-(defconstant r_ok 4 #!+sb-doc "Test for read permission")
-(defconstant w_ok 2 #!+sb-doc "Test for write permission")
-(defconstant x_ok 1 #!+sb-doc "Test for execute permission")
-(defconstant f_ok 0 #!+sb-doc "Test for presence of file")
+;;;; POSIX Standard: 6.5 File Control Operations <fcntl.h>
;;; Open the file whose pathname is specified by PATH for reading
;;; and/or writing as specified by the FLAGS argument. Various FLAGS
;;; file descriptor is returned by UNIX-OPEN.
(defun unix-open (path flags mode)
(declare (type unix-pathname path)
- (type fixnum flags)
- (type unix-file-mode mode))
- (int-syscall ("open" c-string int int) path flags mode))
+ (type fixnum flags)
+ (type unix-file-mode mode))
+ (int-syscall ("open" c-string int int)
+ path
+ (logior #!+win32 o_binary
+ #!+largefile o_largefile
+ flags)
+ mode))
;;; UNIX-CLOSE accepts a file descriptor and attempts to close the file
;;; associated with it.
(declare (type unix-fd fd))
(void-syscall ("close" int) fd))
\f
-;;;; fcntlbits.h
-
-(/show0 "unix.lisp 337")
-(defconstant o_rdonly 0) ; read-only flag
-(defconstant o_wronly 1) ; write-only flag
-(defconstant o_rdwr 2) ; read/write flag
-(defconstant o_accmode 3) ; access mode mask
-(defconstant o_creat ; create-if-nonexistent flag (not fcntl)
- #!+linux #o100
- #!+bsd #x0200)
-(/show0 "unix.lisp 345")
-(defconstant o_excl ; error if already exists (not fcntl)
- #!+linux #o200
- #!+bsd #x0800)
-(defconstant o_noctty ; Don't assign controlling tty. (not fcntl)
- #!+linux #o400
- #!+bsd #x8000)
-(defconstant o_trunc ; truncation flag (not fcntl)
- #!+linux #o1000
- #!+bsd #x0400)
-(defconstant o_append ; append flag
- #!+linux #o2000
- #!+bsd #x0008)
-(/show0 "unix.lisp 361")
-\f
;;;; timebits.h
;; A time value that is accurate to the nearest
;; microsecond but also has a range of years.
-(def-alien-type nil
- (struct timeval
- (tv-sec time-t) ; seconds
- (tv-usec time-t))) ; and microseconds
+;; CLH: Note that tv-usec used to be a time-t, but that this seems
+;; problematic on Darwin x86-64 (and wrong). Trying suseconds-t.
+#!-win32
+(define-alien-type nil
+ (struct timeval
+ (tv-sec time-t) ; seconds
+ (tv-usec suseconds-t))) ; and microseconds
+
+#!+win32
+(define-alien-type nil
+ (struct timeval
+ (tv-sec time-t) ; seconds
+ (tv-usec long))) ; and microseconds
\f
;;;; resourcebits.h
-(defconstant rusage_self 0 #!+sb-doc "The calling process.")
-(defconstant rusage_children -1 #!+sb-doc "Terminated child processes.")
+(defconstant rusage_self 0) ; the calling process
+(defconstant rusage_children -1) ; terminated child processes
(defconstant rusage_both -2)
-(def-alien-type nil
+(define-alien-type nil
(struct rusage
- (ru-utime (struct timeval)) ; user time used
- (ru-stime (struct timeval)) ; system time used.
- (ru-maxrss long) ; maximum resident set size (in kilobytes)
- (ru-ixrss long) ; integral shared memory size
- (ru-idrss long) ; integral unshared data size
- (ru-isrss long) ; integral unshared stack size
- (ru-minflt long) ; page reclaims
- (ru-majflt long) ; page faults
- (ru-nswap long) ; swaps
- (ru-inblock long) ; block input operations
- (ru-oublock long) ; block output operations
- (ru-msgsnd long) ; messages sent
- (ru-msgrcv long) ; messages received
- (ru-nsignals long) ; signals received
- (ru-nvcsw long) ; voluntary context switches
- (ru-nivcsw long))) ; involuntary context switches
-\f
-;;;; statbuf.h
-
-;;; FIXME: This should go into C code so that we don't need to hand-copy
-;;; it from header files.
-#!+Linux
-(def-alien-type nil
- (struct stat
- (st-dev dev-t)
- (st-pad1 unsigned-short)
- (st-ino ino-t)
- (st-mode mode-t)
- (st-nlink nlink-t)
- (st-uid uid-t)
- (st-gid gid-t)
- (st-rdev dev-t)
- (st-pad2 unsigned-short)
- (st-size off-t)
- (st-blksize unsigned-long)
- (st-blocks unsigned-long)
- (st-atime time-t)
- (unused-1 unsigned-long)
- (st-mtime time-t)
- (unused-2 unsigned-long)
- (st-ctime time-t)
- (unused-3 unsigned-long)
- (unused-4 unsigned-long)
- (unused-5 unsigned-long)))
-
-#!+bsd
-(def-alien-type nil
- (struct timespec-t
- (tv-sec long)
- (tv-nsec long)))
-
-#!+bsd
-(def-alien-type nil
- (struct stat
- (st-dev dev-t)
- (st-ino ino-t)
- (st-mode mode-t)
- (st-nlink nlink-t)
- (st-uid uid-t)
- (st-gid gid-t)
- (st-rdev dev-t)
- (st-atime (struct timespec-t))
- (st-mtime (struct timespec-t))
- (st-ctime (struct timespec-t))
- (st-size unsigned-long) ; really quad
- (st-sizeh unsigned-long) ;
- (st-blocks unsigned-long) ; really quad
- (st-blocksh unsigned-long)
- (st-blksize unsigned-long)
- (st-flags unsigned-long)
- (st-gen unsigned-long)
- (st-lspare long)
- (st-qspare (array long 4))
- ))
-
-;; encoding of the file mode
-
-(defconstant s-ifmt #o0170000 #!+sb-doc "These bits determine file type.")
-
-;; file types
-(defconstant s-ififo #o0010000 #!+sb-doc "FIFO")
-(defconstant s-ifchr #o0020000 #!+sb-doc "Character device")
-(defconstant s-ifdir #o0040000 #!+sb-doc "Directory")
-(defconstant s-ifblk #o0060000 #!+sb-doc "Block device")
-(defconstant s-ifreg #o0100000 #!+sb-doc "Regular file")
-
-;; These don't actually exist on System V, but having them doesn't hurt.
-(defconstant s-iflnk #o0120000 #!+sb-doc "Symbolic link.")
-(defconstant s-ifsock #o0140000 #!+sb-doc "Socket.")
+ (ru-utime (struct timeval)) ; user time used
+ (ru-stime (struct timeval)) ; system time used.
+ (ru-maxrss long) ; maximum resident set size (in kilobytes)
+ (ru-ixrss long) ; integral shared memory size
+ (ru-idrss long) ; integral unshared data size
+ (ru-isrss long) ; integral unshared stack size
+ (ru-minflt long) ; page reclaims
+ (ru-majflt long) ; page faults
+ (ru-nswap long) ; swaps
+ (ru-inblock long) ; block input operations
+ (ru-oublock long) ; block output operations
+ (ru-msgsnd long) ; messages sent
+ (ru-msgrcv long) ; messages received
+ (ru-nsignals long) ; signals received
+ (ru-nvcsw long) ; voluntary context switches
+ (ru-nivcsw long))) ; involuntary context switches
\f
;;;; unistd.h
-;;; values for the second argument to access
+;;; Given a file path (a string) and one of four constant modes,
+;;; return T if the file is accessible with that mode and NIL if not.
+;;; When NIL, also return an errno value with NIL which tells why the
+;;; file was not accessible.
+;;;
+;;; The access modes are:
+;;; r_ok Read permission.
+;;; w_ok Write permission.
+;;; x_ok Execute permission.
+;;; f_ok Presence of file.
+
+;;; In Windows, the MODE argument to access is defined in terms of
+;;; literal magic numbers---there are no constants to grovel. X_OK
+;;; is not defined.
+#!+win32
+(progn
+ (defconstant f_ok 0)
+ (defconstant w_ok 2)
+ (defconstant r_ok 4))
+
(defun unix-access (path mode)
- #!+sb-doc
- "Given a file path (a string) and one of four constant modes,
- UNIX-ACCESS returns T if the file is accessible with that
- mode and NIL if not. It also returns an errno value with
- NIL which determines why the file was not accessible.
-
- The access modes are:
- r_ok Read permission.
- w_ok Write permission.
- x_ok Execute permission.
- f_ok Presence of file."
(declare (type unix-pathname path)
- (type (mod 8) mode))
+ (type (mod 8) mode))
(void-syscall ("access" c-string int) path mode))
-(defconstant l_set 0 #!+sb-doc "set the file pointer")
-(defconstant l_incr 1 #!+sb-doc "increment the file pointer")
-(defconstant l_xtnd 2 #!+sb-doc "extend the file size")
+;;; values for the second argument to UNIX-LSEEK
+(defconstant l_set 0) ; to set the file pointer
+(defconstant l_incr 1) ; to increment the file pointer
+(defconstant l_xtnd 2) ; to extend the file size
+
+;;; Is a stream interactive?
+(defun unix-isatty (fd)
+ (declare (type unix-fd fd))
+ (int-syscall ("isatty" int) fd))
(defun unix-lseek (fd offset whence)
- #!+sb-doc
- "Unix-lseek accepts a file descriptor and moves the file pointer ahead
- a certain offset for that file. Whence can be any of the following:
+ "Unix-lseek accepts a file descriptor and moves the file pointer by
+ OFFSET octets. Whence can be any of the following:
- l_set Set the file pointer.
- l_incr Increment the file pointer.
- l_xtnd Extend the file size.
+ L_SET Set the file pointer.
+ L_INCR Increment the file pointer.
+ L_XTND Extend the file size.
"
(declare (type unix-fd fd)
- (type (unsigned-byte 32) offset)
- (type (integer 0 2) whence))
- #!-(and x86 bsd)
- (int-syscall ("lseek" int off-t int) fd offset whence)
- ;; Need a 64-bit return value type for this. TBD. For now,
- ;; don't use this with any 2G+ partitions.
- #!+(and x86 bsd)
- (int-syscall ("lseek" int unsigned-long unsigned-long int)
- fd offset 0 whence))
+ (type (integer 0 2) whence))
+ (let ((result (alien-funcall (extern-alien #!-largefile "lseek"
+ #!+largefile "lseek_largefile"
+ (function off-t int off-t int))
+ fd offset whence)))
+ (if (minusp result )
+ (values nil (get-errno))
+ (values result 0))))
;;; UNIX-READ accepts a file descriptor, a buffer, and the length to read.
;;; It attempts to read len bytes from the device associated with fd
;;; and store them into the buffer. It returns the actual number of
;;; bytes read.
(defun unix-read (fd buf len)
- #!+sb-doc
- "Unix-read attempts to read from the file described by fd into
- the buffer buf until it is full. Len is the length of the buffer.
- The number of bytes actually read is returned or NIL and an error
- number if an error occurred."
(declare (type unix-fd fd)
- (type (unsigned-byte 32) len))
+ (type (unsigned-byte 32) len))
(int-syscall ("read" int (* char) int) fd buf len))
;;; UNIX-WRITE accepts a file descriptor, a buffer, an offset, and the
;;; length to write. It attempts to write len bytes to the device
-;;; associated with fd from the the buffer starting at offset. It returns
+;;; associated with fd from the buffer starting at offset. It returns
;;; the actual number of bytes written.
(defun unix-write (fd buf offset len)
- #!+sb-doc
- "Unix-write attempts to write a character buffer (buf) of length
- len to the file described by the file descriptor fd. NIL and an
- error is returned if the call is unsuccessful."
(declare (type unix-fd fd)
- (type (unsigned-byte 32) offset len))
+ (type (unsigned-byte 32) offset len))
(int-syscall ("write" int (* char) int)
- fd
- (with-alien ((ptr (* char) (etypecase buf
- ((simple-array * (*))
- (vector-sap buf))
- (system-area-pointer
- buf))))
- (addr (deref ptr offset)))
- len))
-
-;;; Set up a unix-piping mechanism consisting of
-;;; an input pipe and an output pipe. Return two
-;;; values: if no error occurred the first value is the pipe
-;;; to be read from and the second is can be written to. If
-;;; an error occurred the first value is NIL and the second
-;;; the unix error code.
+ fd
+ (with-alien ((ptr (* char) (etypecase buf
+ ((simple-array * (*))
+ (vector-sap buf))
+ (system-area-pointer
+ buf))))
+ (addr (deref ptr offset)))
+ len))
+
+;;; Set up a unix-piping mechanism consisting of an input pipe and an
+;;; output pipe. Return two values: if no error occurred the first
+;;; value is the pipe to be read from and the second is can be written
+;;; to. If an error occurred the first value is NIL and the second the
+;;; unix error code.
+#!-win32
(defun unix-pipe ()
(with-alien ((fds (array int 2)))
(syscall ("pipe" (* int))
- (values (deref fds 0) (deref fds 1))
- (cast fds (* int)))))
-
-;;; UNIX-CHDIR accepts a directory name and makes that the
-;;; current working directory.
-(defun unix-chdir (path)
- #!+sb-doc
- "Given a file path string, unix-chdir changes the current working
- directory to the one specified."
- (declare (type unix-pathname path))
- (void-syscall ("chdir" c-string) path))
-
-(defun unix-current-directory ()
- #!+sb-doc
- "Return the current directory as a SIMPLE-STRING."
- ;; FIXME: Gcc justifiably complains that getwd is dangerous and should
- ;; not be used; especially with a hardwired 1024 buffer size, yecch.
- ;; This should be rewritten to use getcwd(3), perhaps by writing
- ;; a C service routine to do the actual call to getcwd(3) and check
- ;; of return values.
- (with-alien ((buf (array char 1024)))
- (values (not (zerop (alien-funcall (extern-alien "getwd"
- (function int (* char)))
- (cast buf (* char)))))
- (cast buf c-string))))
+ (values (deref fds 0) (deref fds 1))
+ (cast fds (* int)))))
+#!+win32
+(defun msvcrt-raw-pipe (fds size mode)
+ (syscall ("_pipe" (* int) int int)
+ (values (deref fds 0) (deref fds 1))
+ (cast fds (* int)) size mode))
+#!+win32
+(defun unix-pipe ()
+ (with-alien ((fds (array int 2)))
+ (msvcrt-raw-pipe fds 256 o_binary)))
+;; Windows mkdir() doesn't take the mode argument. It's cdecl, so we could
+;; actually call it passing the mode argument, but some sharp-eyed reader
+;; would put five and twenty-seven together and ask us about it, so...
+;; -- AB, 2005-12-27
+#!-win32
+(defun unix-mkdir (name mode)
+ (declare (type unix-pathname name)
+ (type unix-file-mode mode)
+ #!+win32 (ignore mode))
+ (void-syscall ("mkdir" c-string #!-win32 int) name #!-win32 mode))
+
+;;; Given a C char* pointer allocated by malloc(), free it and return a
+;;; corresponding Lisp string (or return NIL if the pointer is a C NULL).
+(defun newcharstar-string (newcharstar)
+ (declare (type (alien (* char)) newcharstar))
+ (if (null-alien newcharstar)
+ nil
+ (prog1
+ (cast newcharstar c-string)
+ (free-alien newcharstar))))
+
+;;; Return the Unix current directory as a SIMPLE-STRING, in the
+;;; style returned by getcwd() (no trailing slash character).
+#!-win32
+(defun posix-getcwd ()
+ ;; This implementation relies on a BSD/Linux extension to getcwd()
+ ;; behavior, automatically allocating memory when a null buffer
+ ;; pointer is used. On a system which doesn't support that
+ ;; extension, it'll have to be rewritten somehow.
+ ;;
+ ;; SunOS and OSF/1 provide almost as useful an extension: if given a null
+ ;; buffer pointer, it will automatically allocate size space. The
+ ;; KLUDGE in this solution arises because we have just read off
+ ;; PATH_MAX+1 from the Solaris header files and stuck it in here as
+ ;; a constant. Going the grovel_headers route doesn't seem to be
+ ;; helpful, either, as Solaris doesn't export PATH_MAX from
+ ;; unistd.h.
+ ;;
+ ;; FIXME: The (,stub,) nastiness produces an error message about a
+ ;; comma not inside a backquote. This error has absolutely nothing
+ ;; to do with the actual meaning of the error (and little to do with
+ ;; its location, either).
+ #!-(or linux openbsd freebsd netbsd sunos osf1 darwin win32) (,stub,)
+ #!+(or linux openbsd freebsd netbsd sunos osf1 darwin win32)
+ (or (newcharstar-string (alien-funcall (extern-alien "getcwd"
+ (function (* char)
+ (* char)
+ size-t))
+ nil
+ #!+(or linux openbsd freebsd netbsd darwin win32) 0
+ #!+(or sunos osf1) 1025))
+ (simple-perror "getcwd")))
+
+;;; Return the Unix current directory as a SIMPLE-STRING terminated
+;;; by a slash character.
+(defun posix-getcwd/ ()
+ (concatenate 'string (posix-getcwd) "/"))
+
+;;; Duplicate an existing file descriptor (given as the argument) and
+;;; return it. If FD is not a valid file descriptor, NIL and an error
+;;; number are returned.
(defun unix-dup (fd)
- #!+sb-doc
- "Unix-dup duplicates an existing file descriptor (given as the
- argument) and returns it. If FD is not a valid file descriptor, NIL
- and an error number are returned."
(declare (type unix-fd fd))
(int-syscall ("dup" int) fd))
-;;; UNIX-EXIT terminates a program.
+;;; Terminate the current process with an optional error code. If
+;;; successful, the call doesn't return. If unsuccessful, the call
+;;; returns NIL and an error number.
(defun unix-exit (&optional (code 0))
- #!+sb-doc
- "Unix-exit terminates the current process with an optional
- error code. If successful, the call doesn't return. If
- unsuccessful, the call returns NIL and an error number."
(declare (type (signed-byte 32) code))
(void-syscall ("exit" int) code))
-(def-alien-routine ("getpid" unix-getpid) int
- #!+sb-doc
- "Unix-getpid returns the process-id of the current process.")
-
-(def-alien-routine ("getuid" unix-getuid) int
- #!+sb-doc
- "Unix-getuid returns the real user-id associated with the
- current process.")
-
+;;; Return the process id of the current process.
+(define-alien-routine ("getpid" unix-getpid) int)
+
+;;; Return the real user id associated with the current process.
+#!-win32
+(define-alien-routine ("getuid" unix-getuid) int)
+
+;;; Translate a user id into a login name.
+#!-win32
+(defun uid-username (uid)
+ (or (newcharstar-string (alien-funcall (extern-alien "uid_username"
+ (function (* char) int))
+ uid))
+ (error "found no match for Unix uid=~S" uid)))
+
+;;; Return the namestring of the home directory, being careful to
+;;; include a trailing #\/
+#!-win32
+(defun uid-homedir (uid)
+ (or (newcharstar-string (alien-funcall (extern-alien "uid_homedir"
+ (function (* char) int))
+ uid))
+ (error "failed to resolve home directory for Unix uid=~S" uid)))
+
+;;; Invoke readlink(2) on the file name specified by PATH. Return
+;;; (VALUES LINKSTRING NIL) on success, or (VALUES NIL ERRNO) on
+;;; failure.
+#!-win32
(defun unix-readlink (path)
- #!+sb-doc
- "Unix-readlink invokes the readlink system call on the file name
- specified by the simple string path. It returns up to two values:
- the contents of the symbolic link if the call is successful, or
- NIL and the Unix error number."
(declare (type unix-pathname path))
- (with-alien ((buf (array char 1024)))
- (syscall ("readlink" c-string (* char) int)
- (let ((string (make-string result)))
- (sb!kernel:copy-from-system-area
- (alien-sap buf) 0
- string (* sb!vm:vector-data-offset sb!vm:word-bits)
- (* result sb!vm:byte-bits))
- string)
- path (cast buf (* char)) 1024)))
+ (with-alien ((ptr (* char)
+ (alien-funcall (extern-alien
+ "wrapped_readlink"
+ (function (* char) c-string))
+ path)))
+ (if (null-alien ptr)
+ (values nil (get-errno))
+ (multiple-value-prog1
+ (values (with-alien ((c-string c-string ptr)) c-string)
+ nil)
+ (free-alien ptr)))))
+#!+win32
+;; Win32 doesn't do links, but something likes to call this anyway.
+;; Something in this file, no less. But it only takes one result, so...
+(defun unix-readlink (path)
+ (declare (ignore path))
+ nil)
;;; UNIX-UNLINK accepts a name and deletes the directory entry for that
;;; name and the file if this is the last link.
(defun unix-unlink (name)
- #!+sb-doc
- "Unix-unlink removes the directory entry for the named file.
- NIL and an error code is returned if the call fails."
(declare (type unix-pathname name))
(void-syscall ("unlink" c-string) name))
-(defun %set-tty-process-group (pgrp &optional fd)
- #!+sb-doc
- "Set the tty-process-group for the unix file-descriptor FD to PGRP. If not
- supplied, FD defaults to /dev/tty."
- (let ((old-sigs (unix-sigblock (sigmask :sigttou
- :sigttin
- :sigtstp
- :sigchld))))
- (declare (type (unsigned-byte 32) old-sigs))
- (unwind-protect
- (if fd
- (tcsetpgrp fd pgrp)
- (multiple-value-bind (tty-fd errno) (unix-open "/dev/tty" o_rdwr 0)
- (cond (tty-fd
- (multiple-value-prog1
- (tcsetpgrp tty-fd pgrp)
- (unix-close tty-fd)))
- (t
- (values nil errno)))))
- (unix-sigsetmask old-sigs))))
-
+;;; Return the name of the host machine as a string.
+#!-win32
(defun unix-gethostname ()
- #!+sb-doc
- "Unix-gethostname returns the name of the host machine as a string."
(with-alien ((buf (array char 256)))
(syscall ("gethostname" (* char) int)
- (cast buf c-string)
- (cast buf (* char)) 256)))
+ (cast buf c-string)
+ (cast buf (* char)) 256)))
+
+#!-win32
+(defun unix-setsid ()
+ (int-syscall ("setsid")))
-(defun unix-fsync (fd)
- #!+sb-doc
- "Unix-fsync writes the core image of the file described by
- fd to disk."
- (declare (type unix-fd fd))
- (void-syscall ("fsync" int) fd))
-\f
;;;; sys/ioctl.h
+;;; UNIX-IOCTL performs a variety of operations on open i/o
+;;; descriptors. See the UNIX Programmer's Manual for more
+;;; information.
+#!-win32
(defun unix-ioctl (fd cmd arg)
- #!+sb-doc
- "Unix-ioctl performs a variety of operations on open i/o
- descriptors. See the UNIX Programmer's Manual for more
- information."
(declare (type unix-fd fd)
- (type (unsigned-byte 32) cmd))
- (void-syscall ("ioctl" int unsigned-int (* char)) fd cmd arg))
+ (type (signed-byte 32) cmd))
+ (void-syscall ("ioctl" int int (* char)) fd cmd arg))
\f
;;;; sys/resource.h
;;; FIXME: All we seem to need is the RUSAGE_SELF version of this.
+;;;
+;;; This is like getrusage(2), except it returns only the system and
+;;; user time, and returns the seconds and microseconds as separate
+;;; values.
#!-sb-fluid (declaim (inline unix-fast-getrusage))
+#!-win32
(defun unix-fast-getrusage (who)
- #!+sb-doc
- "Like call getrusage, but return only the system and user time, and returns
- the seconds and microseconds as separate values."
(declare (values (member t)
- (unsigned-byte 31) (mod 1000000)
- (unsigned-byte 31) (mod 1000000)))
+ (unsigned-byte 31) (integer 0 1000000)
+ (unsigned-byte 31) (integer 0 1000000)))
(with-alien ((usage (struct rusage)))
(syscall* ("getrusage" int (* (struct rusage)))
- (values t
- (slot (slot usage 'ru-utime) 'tv-sec)
- (slot (slot usage 'ru-utime) 'tv-usec)
- (slot (slot usage 'ru-stime) 'tv-sec)
- (slot (slot usage 'ru-stime) 'tv-usec))
- who (addr usage))))
-
+ (values t
+ (slot (slot usage 'ru-utime) 'tv-sec)
+ (slot (slot usage 'ru-utime) 'tv-usec)
+ (slot (slot usage 'ru-stime) 'tv-sec)
+ (slot (slot usage 'ru-stime) 'tv-usec))
+ who (addr usage))))
+
+;;; Return information about the resource usage of the process
+;;; specified by WHO. WHO can be either the current process
+;;; (rusage_self) or all of the terminated child processes
+;;; (rusage_children). NIL and an error number is returned if the call
+;;; fails.
+#!-win32
(defun unix-getrusage (who)
- #!+sb-doc
- "Unix-getrusage returns information about the resource usage
- of the process specified by who. Who can be either the
- current process (rusage_self) or all of the terminated
- child processes (rusage_children). NIL and an error number
- is returned if the call fails."
(with-alien ((usage (struct rusage)))
(syscall ("getrusage" int (* (struct rusage)))
- (values t
- (+ (* (slot (slot usage 'ru-utime) 'tv-sec) 1000000)
- (slot (slot usage 'ru-utime) 'tv-usec))
- (+ (* (slot (slot usage 'ru-stime) 'tv-sec) 1000000)
- (slot (slot usage 'ru-stime) 'tv-usec))
- (slot usage 'ru-maxrss)
- (slot usage 'ru-ixrss)
- (slot usage 'ru-idrss)
- (slot usage 'ru-isrss)
- (slot usage 'ru-minflt)
- (slot usage 'ru-majflt)
- (slot usage 'ru-nswap)
- (slot usage 'ru-inblock)
- (slot usage 'ru-oublock)
- (slot usage 'ru-msgsnd)
- (slot usage 'ru-msgrcv)
- (slot usage 'ru-nsignals)
- (slot usage 'ru-nvcsw)
- (slot usage 'ru-nivcsw))
- who (addr usage))))
-
+ (values t
+ (+ (* (slot (slot usage 'ru-utime) 'tv-sec) 1000000)
+ (slot (slot usage 'ru-utime) 'tv-usec))
+ (+ (* (slot (slot usage 'ru-stime) 'tv-sec) 1000000)
+ (slot (slot usage 'ru-stime) 'tv-usec))
+ (slot usage 'ru-maxrss)
+ (slot usage 'ru-ixrss)
+ (slot usage 'ru-idrss)
+ (slot usage 'ru-isrss)
+ (slot usage 'ru-minflt)
+ (slot usage 'ru-majflt)
+ (slot usage 'ru-nswap)
+ (slot usage 'ru-inblock)
+ (slot usage 'ru-oublock)
+ (slot usage 'ru-msgsnd)
+ (slot usage 'ru-msgrcv)
+ (slot usage 'ru-nsignals)
+ (slot usage 'ru-nvcsw)
+ (slot usage 'ru-nivcsw))
+ who (addr usage))))
\f
;;;; sys/select.h
-(defmacro unix-fast-select (num-descriptors
- read-fds write-fds exception-fds
- timeout-secs &optional (timeout-usecs 0))
- #!+sb-doc
- "Perform the UNIX select(2) system call."
- (declare (type (integer 0 #.FD-SETSIZE) num-descriptors)
- (type (or (alien (* (struct fd-set))) null)
- read-fds write-fds exception-fds)
- (type (or null (unsigned-byte 31)) timeout-secs)
- (type (unsigned-byte 31) timeout-usecs) )
+;;;; FIXME: Why have both UNIX-SELECT and UNIX-FAST-SELECT?
+
+;;; Perform the UNIX select(2) system call.
+(declaim (inline unix-fast-select)) ; (used to be a macro in CMU CL)
+(defun unix-fast-select (num-descriptors
+ read-fds write-fds exception-fds
+ timeout-secs &optional (timeout-usecs 0))
+ (declare (type (integer 0 #.fd-setsize) num-descriptors)
+ (type (or (alien (* (struct fd-set))) null)
+ read-fds write-fds exception-fds)
+ (type (or null (unsigned-byte 31)) timeout-secs)
+ (type (unsigned-byte 31) timeout-usecs))
;; FIXME: CMU CL had
- ;; (optimize (speed 3) (safety 0) (inhibit-warnings 3))
- ;; in the declarations above. If they're important, they should
- ;; be in a declaration inside the LET expansion, not in the
- ;; macro compile-time code.
- `(let ((timeout-secs ,timeout-secs))
- (with-alien ((tv (struct timeval)))
- (when timeout-secs
- (setf (slot tv 'tv-sec) timeout-secs)
- (setf (slot tv 'tv-usec) ,timeout-usecs))
- (int-syscall ("select" int (* (struct fd-set)) (* (struct fd-set))
- (* (struct fd-set)) (* (struct timeval)))
- ,num-descriptors ,read-fds ,write-fds ,exception-fds
- (if timeout-secs (alien-sap (addr tv)) (int-sap 0))))))
+ ;; (declare (optimize (speed 3) (safety 0) (inhibit-warnings 3)))
+ ;; here. Is that important for SBCL? If so, why? Profiling might tell us..
+ (with-alien ((tv (struct timeval)))
+ (when timeout-secs
+ (setf (slot tv 'tv-sec) timeout-secs)
+ (setf (slot tv 'tv-usec) timeout-usecs))
+ (int-syscall ("select" int (* (struct fd-set)) (* (struct fd-set))
+ (* (struct fd-set)) (* (struct timeval)))
+ num-descriptors read-fds write-fds exception-fds
+ (if timeout-secs (alien-sap (addr tv)) (int-sap 0)))))
;;; UNIX-SELECT accepts sets of file descriptors and waits for an event
;;; to happen on one of them or to time out.
(defmacro num-to-fd-set (fdset num)
`(if (fixnump ,num)
(progn
- (setf (deref (slot ,fdset 'fds-bits) 0) ,num)
- ,@(loop for index upfrom 1 below (/ fd-setsize 32)
- collect `(setf (deref (slot ,fdset 'fds-bits) ,index) 0)))
+ (setf (deref (slot ,fdset 'fds-bits) 0) ,num)
+ ,@(loop for index upfrom 1 below (/ fd-setsize
+ sb!vm:n-machine-word-bits)
+ collect `(setf (deref (slot ,fdset 'fds-bits) ,index) 0)))
(progn
- ,@(loop for index upfrom 0 below (/ fd-setsize 32)
- collect `(setf (deref (slot ,fdset 'fds-bits) ,index)
- (ldb (byte 32 ,(* index 32)) ,num))))))
+ ,@(loop for index upfrom 0 below (/ fd-setsize
+ sb!vm:n-machine-word-bits)
+ collect `(setf (deref (slot ,fdset 'fds-bits) ,index)
+ (ldb (byte sb!vm:n-machine-word-bits
+ ,(* index sb!vm:n-machine-word-bits))
+ ,num))))))
(defmacro fd-set-to-num (nfds fdset)
- `(if (<= ,nfds 32)
+ `(if (<= ,nfds sb!vm:n-machine-word-bits)
(deref (slot ,fdset 'fds-bits) 0)
- (+ ,@(loop for index upfrom 0 below (/ fd-setsize 32)
- collect `(ash (deref (slot ,fdset 'fds-bits) ,index)
- ,(* index 32))))))
-
+ (+ ,@(loop for index upfrom 0 below (/ fd-setsize
+ sb!vm:n-machine-word-bits)
+ collect `(ash (deref (slot ,fdset 'fds-bits) ,index)
+ ,(* index sb!vm:n-machine-word-bits))))))
+
+;;; Examine the sets of descriptors passed as arguments to see whether
+;;; they are ready for reading and writing. See the UNIX Programmer's
+;;; Manual for more information.
(defun unix-select (nfds rdfds wrfds xpfds to-secs &optional (to-usecs 0))
- #!+sb-doc
- "Unix-select examines the sets of descriptors passed as arguments
- to see whether they are ready for reading and writing. See the UNIX
- Programmers Manual for more information."
- (declare (type (integer 0 #.FD-SETSIZE) nfds)
- (type unsigned-byte rdfds wrfds xpfds)
- (type (or (unsigned-byte 31) null) to-secs)
- (type (unsigned-byte 31) to-usecs)
- (optimize (speed 3) (safety 0) (inhibit-warnings 3)))
+ (declare (type (integer 0 #.fd-setsize) nfds)
+ (type unsigned-byte rdfds wrfds xpfds)
+ (type (or (unsigned-byte 31) null) to-secs)
+ (type (unsigned-byte 31) to-usecs)
+ (optimize (speed 3) (safety 0) (inhibit-warnings 3)))
(with-alien ((tv (struct timeval))
- (rdf (struct fd-set))
- (wrf (struct fd-set))
- (xpf (struct fd-set)))
+ (rdf (struct fd-set))
+ (wrf (struct fd-set))
+ (xpf (struct fd-set)))
(when to-secs
(setf (slot tv 'tv-sec) to-secs)
- (setf (slot tv 'tv-usec) to-usecs))
+ (setf (slot tv 'tv-usec) to-usecs))
(num-to-fd-set rdf rdfds)
(num-to-fd-set wrf wrfds)
(num-to-fd-set xpf xpfds)
(macrolet ((frob (lispvar alienvar)
- `(if (zerop ,lispvar)
- (int-sap 0)
- (alien-sap (addr ,alienvar)))))
+ `(if (zerop ,lispvar)
+ (int-sap 0)
+ (alien-sap (addr ,alienvar)))))
(syscall ("select" int (* (struct fd-set)) (* (struct fd-set))
- (* (struct fd-set)) (* (struct timeval)))
- (values result
- (fd-set-to-num nfds rdf)
- (fd-set-to-num nfds wrf)
- (fd-set-to-num nfds xpf))
- nfds (frob rdfds rdf) (frob wrfds wrf) (frob xpfds xpf)
- (if to-secs (alien-sap (addr tv)) (int-sap 0))))))
+ (* (struct fd-set)) (* (struct timeval)))
+ (values result
+ (fd-set-to-num nfds rdf)
+ (fd-set-to-num nfds wrf)
+ (fd-set-to-num nfds xpf))
+ nfds (frob rdfds rdf) (frob wrfds wrf) (frob xpfds xpf)
+ (if to-secs (alien-sap (addr tv)) (int-sap 0))))))
\f
;;;; sys/stat.h
-;;; FIXME: This is only used in this file, and needn't be in target Lisp
-;;; runtime. It's also unclear why it needs to be a macro instead of a
-;;; function. Perhaps it should become a FLET.
-(defmacro extract-stat-results (buf)
- `(values T
- #!+bsd
- (slot ,buf 'st-dev)
- #!+linux
- (+ (deref (slot ,buf 'st-dev) 0)
- (* (+ +max-u-long+ 1)
- (deref (slot ,buf 'st-dev) 1))) ;;; let's hope this works..
- (slot ,buf 'st-ino)
- (slot ,buf 'st-mode)
- (slot ,buf 'st-nlink)
- (slot ,buf 'st-uid)
- (slot ,buf 'st-gid)
- #!+bsd
- (slot ,buf 'st-rdev)
- #!+linux
- (+ (deref (slot ,buf 'st-rdev) 0)
- (* (+ +max-u-long+ 1)
- (deref (slot ,buf 'st-rdev) 1))) ;;; let's hope this works..
- #!+linux (slot ,buf 'st-size)
- #!+bsd
- (+ (slot ,buf 'st-size)
- (* (+ +max-u-long+ 1)
- (slot ,buf 'st-sizeh)))
- #!+linux (slot ,buf 'st-atime)
- #!+bsd (slot (slot ,buf 'st-atime) 'tv-sec)
- #!+linux (slot ,buf 'st-mtime)
- #!+bsd (slot (slot ,buf 'st-mtime) 'tv-sec)
- #!+linux (slot ,buf 'st-ctime)
- #!+bsd (slot (slot ,buf 'st-ctime) 'tv-sec)
- (slot ,buf 'st-blksize)
- #!+linux (slot ,buf 'st-blocks)
- #!+bsd
- (+ (slot ,buf 'st-blocks)
- (* (+ +max-u-long+ 1)
- (slot ,buf 'st-blocksh)))
- ))
+;;; This is a structure defined in src/runtime/wrap.c, to look
+;;; basically like "struct stat" according to stat(2). It may not
+;;; actually correspond to the real in-memory stat structure that the
+;;; syscall uses, and that's OK. Linux in particular is packed full of
+;;; stat macros, and trying to keep Lisp code in correspondence with
+;;; it is more pain than it's worth, so we just let our C runtime
+;;; synthesize a nice consistent structure for us.
+;;;
+;;; Note that st-dev is a long, not a dev-t. This is because dev-t on
+;;; linux 32 bit archs is a 64 bit quantity, but alien doesn't support
+;;; those. We don't actually access that field anywhere, though, so
+;;; until we can get 64 bit alien support it'll do. Also note that
+;;; st_size is a long, not an off-t, because off-t is a 64-bit
+;;; quantity on Alpha. And FIXME: "No one would want a file length
+;;; longer than 32 bits anyway, right?":-|
+(define-alien-type nil
+ (struct wrapped_stat
+ (st-dev #!-(or mips largefile) unsigned-int
+ #!+mips unsigned-long
+ #!+largefile dev-t)
+ (st-ino ino-t)
+ (st-mode mode-t)
+ (st-nlink nlink-t)
+ (st-uid uid-t)
+ (st-gid gid-t)
+ (st-rdev #!-(or mips largefile) unsigned-int
+ #!+mips unsigned-long
+ #!+largefile dev-t)
+ (st-size #!-(or mips largefile) unsigned-int
+ #!+(or mips largefile) off-t)
+ (st-blksize unsigned-long)
+ (st-blocks unsigned-long)
+ (st-atime time-t)
+ (st-mtime time-t)
+ (st-ctime time-t)))
+;;; shared C-struct-to-multiple-VALUES conversion for the stat(2)
+;;; family of Unix system calls
+;;;
+;;; FIXME: I think this should probably not be INLINE. However, when
+;;; this was not inline, it seemed to cause memory corruption
+;;; problems. My first guess is that it's a bug in the FFI code, where
+;;; the WITH-ALIEN expansion doesn't deal well with being wrapped
+;;; around a call to a function returning >10 values. But I didn't try
+;;; to figure it out, just inlined it as a quick fix. Perhaps someone
+;;; who's motivated to debug the FFI code can go over the DISASSEMBLE
+;;; output in the not-inlined case and see whether there's a problem,
+;;; and maybe even find a fix..
+(declaim (inline %extract-stat-results))
+(defun %extract-stat-results (wrapped-stat)
+ (declare (type (alien (* (struct wrapped_stat))) wrapped-stat))
+ (values t
+ (slot wrapped-stat 'st-dev)
+ (slot wrapped-stat 'st-ino)
+ (slot wrapped-stat 'st-mode)
+ (slot wrapped-stat 'st-nlink)
+ (slot wrapped-stat 'st-uid)
+ (slot wrapped-stat 'st-gid)
+ (slot wrapped-stat 'st-rdev)
+ (slot wrapped-stat 'st-size)
+ (slot wrapped-stat 'st-atime)
+ (slot wrapped-stat 'st-mtime)
+ (slot wrapped-stat 'st-ctime)
+ (slot wrapped-stat 'st-blksize)
+ (slot wrapped-stat 'st-blocks)))
+
+;;; Unix system calls in the stat(2) family are handled by calls to
+;;; C-level wrapper functions which copy all the raw "struct stat"
+;;; slots into the system-independent wrapped_stat format.
+;;; stat(2) <-> stat_wrapper()
+;;; fstat(2) <-> fstat_wrapper()
+;;; lstat(2) <-> lstat_wrapper()
(defun unix-stat (name)
- #!+sb-doc
- "Unix-stat retrieves information about the specified
- file returning them in the form of multiple values.
- See the UNIX Programmer's Manual for a description
- of the values returned. If the call fails, then NIL
- and an error number is returned instead."
(declare (type unix-pathname name))
- (when (string= name "")
- (setf name "."))
- (with-alien ((buf (struct stat)))
- (syscall ("stat" c-string (* (struct stat)))
- (extract-stat-results buf)
- name (addr buf))))
-
-(defun unix-fstat (fd)
- #!+sb-doc
- "Unix-fstat is similar to unix-stat except the file is specified
- by the file descriptor fd."
- (declare (type unix-fd fd))
- (with-alien ((buf (struct stat)))
- (syscall ("fstat" int (* (struct stat)))
- (extract-stat-results buf)
- fd (addr buf))))
-
+ (with-alien ((buf (struct wrapped_stat)))
+ (syscall ("stat_wrapper" c-string (* (struct wrapped_stat)))
+ (%extract-stat-results (addr buf))
+ name (addr buf))))
(defun unix-lstat (name)
- #!+sb-doc
- "Unix-lstat is similar to unix-stat except the specified
- file must be a symbolic link."
(declare (type unix-pathname name))
- (with-alien ((buf (struct stat)))
- (syscall ("lstat" c-string (* (struct stat)))
- (extract-stat-results buf)
- name (addr buf))))
-
-;;; UNIX-MKDIR accepts a name and a mode and attempts to create the
-;;; corresponding directory with mode mode.
-(defun unix-mkdir (name mode)
- #!+sb-doc
- "Unix-mkdir creates a new directory with the specified name and mode.
- (Same as those for unix-fchmod.) It returns T upon success, otherwise
- NIL and an error number."
- (declare (type unix-pathname name)
- (type unix-file-mode mode))
- (void-syscall ("mkdir" c-string int) name mode))
+ (with-alien ((buf (struct wrapped_stat)))
+ (syscall ("lstat_wrapper" c-string (* (struct wrapped_stat)))
+ (%extract-stat-results (addr buf))
+ name (addr buf))))
+(defun unix-fstat (fd)
+ (declare (type unix-fd fd))
+ (with-alien ((buf (struct wrapped_stat)))
+ (syscall ("fstat_wrapper" int (* (struct wrapped_stat)))
+ (%extract-stat-results (addr buf))
+ fd (addr buf))))
\f
;;;; time.h
-;; the POSIX.4 structure for a time value. This is like a `struct
-;; timeval' but has nanoseconds instead of microseconds.
-(def-alien-type nil
+;; the POSIX.4 structure for a time value. This is like a "struct
+;; timeval" but has nanoseconds instead of microseconds.
+(define-alien-type nil
(struct timespec
- (tv-sec long) ;Seconds
- (tv-nsec long))) ;Nanoseconds
+ (tv-sec long) ; seconds
+ (tv-nsec long))) ; nanoseconds
;; used by other time functions
-(def-alien-type nil
+(define-alien-type nil
(struct tm
- (tm-sec int) ; Seconds. [0-60] (1 leap second)
- (tm-min int) ; Minutes. [0-59]
- (tm-hour int) ; Hours. [0-23]
- (tm-mday int) ; Day. [1-31]
- (tm-mon int) ; Month. [0-11]
- (tm-year int) ; Year - 1900.
- (tm-wday int) ; Day of week. [0-6]
- (tm-yday int) ; Days in year.[0-365]
- (tm-isdst int) ; DST. [-1/0/1]
- (tm-gmtoff long) ; Seconds east of UTC.
- (tm-zone c-string))) ; Timezone abbreviation.
-
-(def-alien-routine get-timezone sb!c-call:void
- (when sb!c-call:long :in)
- (minutes-west sb!c-call:int :out)
+ (tm-sec int) ; Seconds. [0-60] (1 leap second)
+ (tm-min int) ; Minutes. [0-59]
+ (tm-hour int) ; Hours. [0-23]
+ (tm-mday int) ; Day. [1-31]
+ (tm-mon int) ; Month. [0-11]
+ (tm-year int) ; Year - 1900.
+ (tm-wday int) ; Day of week. [0-6]
+ (tm-yday int) ; Days in year. [0-365]
+ (tm-isdst int) ; DST. [-1/0/1]
+ (tm-gmtoff long) ; Seconds east of UTC.
+ (tm-zone c-string))) ; Timezone abbreviation.
+
+(define-alien-routine get-timezone sb!alien:void
+ (when sb!alien:long :in)
+ (seconds-west sb!alien:int :out)
(daylight-savings-p sb!alien:boolean :out))
-(defun unix-get-minutes-west (secs)
- (multiple-value-bind (ignore minutes dst) (get-timezone secs)
+#!-win32
+(defun nanosleep (secs nsecs)
+ (with-alien ((req (struct timespec))
+ (rem (struct timespec)))
+ (setf (slot req 'tv-sec) secs)
+ (setf (slot req 'tv-nsec) nsecs)
+ (loop while (eql sb!unix:eintr
+ (nth-value 1
+ (int-syscall ("nanosleep" (* (struct timespec))
+ (* (struct timespec)))
+ (addr req) (addr rem))))
+ do (rotatef req rem))))
+
+(defun unix-get-seconds-west (secs)
+ (multiple-value-bind (ignore seconds dst) (get-timezone secs)
(declare (ignore ignore) (ignore dst))
- (values minutes)))
-
-(defun unix-get-timezone (secs)
- (multiple-value-bind (ignore minutes dst) (get-timezone secs)
- (declare (ignore ignore) (ignore minutes))
- (values (deref unix-tzname (if dst 1 0)))))
-
+ (values seconds)))
\f
;;;; sys/time.h
;;; Structure crudely representing a timezone. KLUDGE: This is
;;; obsolete and should never be used.
-(def-alien-type nil
+(define-alien-type nil
(struct timezone
- (tz-minuteswest int) ; minutes west of Greenwich
- (tz-dsttime int))) ; type of dst correction
+ (tz-minuteswest int) ; minutes west of Greenwich
+ (tz-dsttime int))) ; type of dst correction
+;;; If it works, UNIX-GETTIMEOFDAY returns 5 values: T, the seconds
+;;; and microseconds of the current time of day, the timezone (in
+;;; minutes west of Greenwich), and a daylight-savings flag. If it
+;;; doesn't work, it returns NIL and the errno.
#!-sb-fluid (declaim (inline unix-gettimeofday))
(defun unix-gettimeofday ()
- #!+sb-doc
- "If it works, unix-gettimeofday returns 5 values: T, the seconds and
- microseconds of the current time of day, the timezone (in minutes west
- of Greenwich), and a daylight-savings flag. If it doesn't work, it
- returns NIL and the errno."
(with-alien ((tv (struct timeval))
- (tz (struct timezone)))
+ (tz (struct timezone)))
(syscall* ("gettimeofday" (* (struct timeval))
- (* (struct timezone)))
- (values T
- (slot tv 'tv-sec)
- (slot tv 'tv-usec)
- (slot tz 'tz-minuteswest)
- (slot tz 'tz-dsttime))
- (addr tv)
- (addr tz))))
+ (* (struct timezone)))
+ (values t
+ (slot tv 'tv-sec)
+ (slot tv 'tv-usec)
+ (slot tz 'tz-minuteswest)
+ (slot tz 'tz-dsttime))
+ (addr tv)
+ (addr tz))))
+\f
+
+;; Type of the second argument to `getitimer' and
+;; the second and third arguments `setitimer'.
+(define-alien-type nil
+ (struct itimerval
+ (it-interval (struct timeval)) ; timer interval
+ (it-value (struct timeval)))) ; current value
+
+(defconstant itimer-real 0)
+(defconstant itimer-virtual 1)
+(defconstant itimer-prof 2)
+
+#!-win32
+(defun unix-getitimer (which)
+ "Unix-getitimer returns the INTERVAL and VALUE slots of one of
+ three system timers (:real :virtual or :profile). On success,
+ unix-getitimer returns 5 values,
+ T, it-interval-secs, it-interval-usec, it-value-secs, it-value-usec."
+ (declare (type (member :real :virtual :profile) which)
+ (values t
+ (unsigned-byte 29) (mod 1000000)
+ (unsigned-byte 29) (mod 1000000)))
+ (let ((which (ecase which
+ (:real itimer-real)
+ (:virtual itimer-virtual)
+ (:profile itimer-prof))))
+ (with-alien ((itv (struct itimerval)))
+ (syscall* ("getitimer" int (* (struct itimerval)))
+ (values t
+ (slot (slot itv 'it-interval) 'tv-sec)
+ (slot (slot itv 'it-interval) 'tv-usec)
+ (slot (slot itv 'it-value) 'tv-sec)
+ (slot (slot itv 'it-value) 'tv-usec))
+ which (alien-sap (addr itv))))))
+
+#!-win32
+(defun unix-setitimer (which int-secs int-usec val-secs val-usec)
+ " Unix-setitimer sets the INTERVAL and VALUE slots of one of
+ three system timers (:real :virtual or :profile). A SIGALRM signal
+ will be delivered VALUE <seconds+microseconds> from now. INTERVAL,
+ when non-zero, is <seconds+microseconds> to be loaded each time
+ the timer expires. Setting INTERVAL and VALUE to zero disables
+ the timer. See the Unix man page for more details. On success,
+ unix-setitimer returns the old contents of the INTERVAL and VALUE
+ slots as in unix-getitimer."
+ (declare (type (member :real :virtual :profile) which)
+ (type (unsigned-byte 29) int-secs val-secs)
+ (type (integer 0 (1000000)) int-usec val-usec)
+ (values t
+ (unsigned-byte 29) (mod 1000000)
+ (unsigned-byte 29) (mod 1000000)))
+ (let ((which (ecase which
+ (:real itimer-real)
+ (:virtual itimer-virtual)
+ (:profile itimer-prof))))
+ (with-alien ((itvn (struct itimerval))
+ (itvo (struct itimerval)))
+ (setf (slot (slot itvn 'it-interval) 'tv-sec ) int-secs
+ (slot (slot itvn 'it-interval) 'tv-usec) int-usec
+ (slot (slot itvn 'it-value ) 'tv-sec ) val-secs
+ (slot (slot itvn 'it-value ) 'tv-usec) val-usec)
+ (syscall* ("setitimer" int (* (struct timeval))(* (struct timeval)))
+ (values t
+ (slot (slot itvo 'it-interval) 'tv-sec)
+ (slot (slot itvo 'it-interval) 'tv-usec)
+ (slot (slot itvo 'it-value) 'tv-sec)
+ (slot (slot itvo 'it-value) 'tv-usec))
+ which (alien-sap (addr itvn))(alien-sap (addr itvo))))))
+
\f
-;;;; asm/errno.h
-
-#|
-(def-unix-error ESUCCESS 0 "Successful")
-(def-unix-error EPERM 1 "Operation not permitted")
-|#
-(def-unix-error ENOENT 2 "No such file or directory")
-#|
-(def-unix-error ESRCH 3 "No such process")
-|#
-(def-unix-error EINTR 4 "Interrupted system call")
-(def-unix-error EIO 5 "I/O error")
-#|
-(def-unix-error ENXIO 6 "No such device or address")
-(def-unix-error E2BIG 7 "Arg list too long")
-(def-unix-error ENOEXEC 8 "Exec format error")
-(def-unix-error EBADF 9 "Bad file number")
-(def-unix-error ECHILD 10 "No children")
-(def-unix-error EAGAIN 11 "Try again")
-(def-unix-error ENOMEM 12 "Out of memory")
-|#
-(def-unix-error EACCES 13 "Permission denied")
-#|
-(def-unix-error EFAULT 14 "Bad address")
-(def-unix-error ENOTBLK 15 "Block device required")
-(def-unix-error EBUSY 16 "Device or resource busy")
-|#
-(def-unix-error EEXIST 17 "File exists")
-#|
-(def-unix-error EXDEV 18 "Cross-device link")
-(def-unix-error ENODEV 19 "No such device")
-|#
-(def-unix-error ENOTDIR 20 "Not a directory")
-#|
-(def-unix-error EISDIR 21 "Is a directory")
-(def-unix-error EINVAL 22 "Invalid argument")
-(def-unix-error ENFILE 23 "File table overflow")
-(def-unix-error EMFILE 24 "Too many open files")
-(def-unix-error ENOTTY 25 "Not a typewriter")
-(def-unix-error ETXTBSY 26 "Text file busy")
-(def-unix-error EFBIG 27 "File too large")
-(def-unix-error ENOSPC 28 "No space left on device")
-|#
-(def-unix-error ESPIPE 29 "Illegal seek")
-#|
-(def-unix-error EROFS 30 "Read-only file system")
-(def-unix-error EMLINK 31 "Too many links")
-(def-unix-error EPIPE 32 "Broken pipe")
-|#
-
-#|
-;;; Math
-(def-unix-error EDOM 33 "Math argument out of domain")
-(def-unix-error ERANGE 34 "Math result not representable")
-(def-unix-error EDEADLK 35 "Resource deadlock would occur")
-(def-unix-error ENAMETOOLONG 36 "File name too long")
-(def-unix-error ENOLCK 37 "No record locks available")
-(def-unix-error ENOSYS 38 "Function not implemented")
-(def-unix-error ENOTEMPTY 39 "Directory not empty")
-(def-unix-error ELOOP 40 "Too many symbolic links encountered")
-|#
-(def-unix-error EWOULDBLOCK 11 "Operation would block")
-(/show0 "unix.lisp 3192")
-#|
-(def-unix-error ENOMSG 42 "No message of desired type")
-(def-unix-error EIDRM 43 "Identifier removed")
-(def-unix-error ECHRNG 44 "Channel number out of range")
-(def-unix-error EL2NSYNC 45 "Level 2 not synchronized")
-(def-unix-error EL3HLT 46 "Level 3 halted")
-(def-unix-error EL3RST 47 "Level 3 reset")
-(def-unix-error ELNRNG 48 "Link number out of range")
-(def-unix-error EUNATCH 49 "Protocol driver not attached")
-(def-unix-error ENOCSI 50 "No CSI structure available")
-(def-unix-error EL2HLT 51 "Level 2 halted")
-(def-unix-error EBADE 52 "Invalid exchange")
-(def-unix-error EBADR 53 "Invalid request descriptor")
-(def-unix-error EXFULL 54 "Exchange full")
-(def-unix-error ENOANO 55 "No anode")
-(def-unix-error EBADRQC 56 "Invalid request code")
-(def-unix-error EBADSLT 57 "Invalid slot")
-(def-unix-error EDEADLOCK EDEADLK "File locking deadlock error")
-(def-unix-error EBFONT 59 "Bad font file format")
-(def-unix-error ENOSTR 60 "Device not a stream")
-(def-unix-error ENODATA 61 "No data available")
-(def-unix-error ETIME 62 "Timer expired")
-(def-unix-error ENOSR 63 "Out of streams resources")
-(def-unix-error ENONET 64 "Machine is not on the network")
-(def-unix-error ENOPKG 65 "Package not installed")
-(def-unix-error EREMOTE 66 "Object is remote")
-(def-unix-error ENOLINK 67 "Link has been severed")
-(def-unix-error EADV 68 "Advertise error")
-(def-unix-error ESRMNT 69 "Srmount error")
-(def-unix-error ECOMM 70 "Communication error on send")
-(def-unix-error EPROTO 71 "Protocol error")
-(def-unix-error EMULTIHOP 72 "Multihop attempted")
-(def-unix-error EDOTDOT 73 "RFS specific error")
-(def-unix-error EBADMSG 74 "Not a data message")
-(def-unix-error EOVERFLOW 75 "Value too large for defined data type")
-(def-unix-error ENOTUNIQ 76 "Name not unique on network")
-(def-unix-error EBADFD 77 "File descriptor in bad state")
-(def-unix-error EREMCHG 78 "Remote address changed")
-(def-unix-error ELIBACC 79 "Can not access a needed shared library")
-(def-unix-error ELIBBAD 80 "Accessing a corrupted shared library")
-(def-unix-error ELIBSCN 81 ".lib section in a.out corrupted")
-(def-unix-error ELIBMAX 82 "Attempting to link in too many shared libraries")
-(def-unix-error ELIBEXEC 83 "Cannot exec a shared library directly")
-(def-unix-error EILSEQ 84 "Illegal byte sequence")
-(def-unix-error ERESTART 85 "Interrupted system call should be restarted ")
-(def-unix-error ESTRPIPE 86 "Streams pipe error")
-(def-unix-error EUSERS 87 "Too many users")
-(def-unix-error ENOTSOCK 88 "Socket operation on non-socket")
-(def-unix-error EDESTADDRREQ 89 "Destination address required")
-(def-unix-error EMSGSIZE 90 "Message too long")
-(def-unix-error EPROTOTYPE 91 "Protocol wrong type for socket")
-(def-unix-error ENOPROTOOPT 92 "Protocol not available")
-(def-unix-error EPROTONOSUPPORT 93 "Protocol not supported")
-(def-unix-error ESOCKTNOSUPPORT 94 "Socket type not supported")
-(def-unix-error EOPNOTSUPP 95 "Operation not supported on transport endpoint")
-(def-unix-error EPFNOSUPPORT 96 "Protocol family not supported")
-(def-unix-error EAFNOSUPPORT 97 "Address family not supported by protocol")
-(def-unix-error EADDRINUSE 98 "Address already in use")
-(def-unix-error EADDRNOTAVAIL 99 "Cannot assign requested address")
-(def-unix-error ENETDOWN 100 "Network is down")
-(def-unix-error ENETUNREACH 101 "Network is unreachable")
-(def-unix-error ENETRESET 102 "Network dropped connection because of reset")
-(def-unix-error ECONNABORTED 103 "Software caused connection abort")
-(def-unix-error ECONNRESET 104 "Connection reset by peer")
-(def-unix-error ENOBUFS 105 "No buffer space available")
-(def-unix-error EISCONN 106 "Transport endpoint is already connected")
-(def-unix-error ENOTCONN 107 "Transport endpoint is not connected")
-(def-unix-error ESHUTDOWN 108 "Cannot send after transport endpoint shutdown")
-(def-unix-error ETOOMANYREFS 109 "Too many references: cannot splice")
-(def-unix-error ETIMEDOUT 110 "Connection timed out")
-(def-unix-error ECONNREFUSED 111 "Connection refused")
-(def-unix-error EHOSTDOWN 112 "Host is down")
-(def-unix-error EHOSTUNREACH 113 "No route to host")
-(def-unix-error EALREADY 114 "Operation already in progress")
-(def-unix-error EINPROGRESS 115 "Operation now in progress")
-(def-unix-error ESTALE 116 "Stale NFS file handle")
-(def-unix-error EUCLEAN 117 "Structure needs cleaning")
-(def-unix-error ENOTNAM 118 "Not a XENIX named type file")
-(def-unix-error ENAVAIL 119 "No XENIX semaphores available")
-(def-unix-error EISNAM 120 "Is a named type file")
-(def-unix-error EREMOTEIO 121 "Remote I/O error")
-(def-unix-error EDQUOT 122 "Quota exceeded")
-|#
-
-;;; And now for something completely different ...
-(emit-unix-errors)
+;;; FIXME: Many Unix error code definitions were deleted from the old
+;;; CMU CL source code here, but not in the exports of SB-UNIX. I
+;;; (WHN) hope that someday I'll figure out an automatic way to detect
+;;; unused symbols in package exports, but if I don't, there are
+;;; enough of them all in one place here that they should probably be
+;;; removed by hand.
\f
;;;; support routines for dealing with Unix pathnames
(multiple-value-bind (res dev ino mode)
(if check-for-links (unix-lstat name) (unix-stat name))
(declare (type (or fixnum null) mode)
- (ignore dev ino))
+ (ignore dev ino))
(when res
(let ((kind (logand mode s-ifmt)))
- (cond ((eql kind s-ifdir) :directory)
- ((eql kind s-ifreg) :file)
- ((eql kind s-iflnk) :link)
- (t :special))))))
-
-(defun unix-maybe-prepend-current-directory (name)
- (declare (simple-string name))
- (if (and (> (length name) 0) (char= (schar name 0) #\/))
- name
- (multiple-value-bind (win dir) (unix-current-directory)
- (if win
- (concatenate 'simple-string dir "/" name)
- name))))
-
-;;; Return the pathname with all symbolic links resolved.
+ (cond ((eql kind s-ifdir) :directory)
+ ((eql kind s-ifreg) :file)
+ #!-win32
+ ((eql kind s-iflnk) :link)
+ (t :special))))))
+
+;;; Is the Unix pathname PATHNAME relative, instead of absolute? (E.g.
+;;; "passwd" or "etc/passwd" instead of "/etc/passwd"?)
+(defun relative-unix-pathname? (pathname)
+ (declare (type simple-string pathname))
+ (or (zerop (length pathname))
+ (char/= (schar pathname 0) #\/)))
+
+;;; Return PATHNAME with all symbolic links resolved. PATHNAME should
+;;; already be a complete absolute Unix pathname, since at least in
+;;; sbcl-0.6.12.36 we're called only from TRUENAME, and only after
+;;; paths have been converted to absolute paths, so we don't need to
+;;; try to handle any more generality than that.
(defun unix-resolve-links (pathname)
- (declare (simple-string pathname))
- (let ((len (length pathname))
- (pending pathname))
- (declare (fixnum len) (simple-string pending))
- (if (zerop len)
- pathname
- (let ((result (make-string 1024 :initial-element (code-char 0)))
- (fill-ptr 0)
- (name-start 0))
- (loop
- (let* ((name-end (or (position #\/ pending :start name-start) len))
- (new-fill-ptr (+ fill-ptr (- name-end name-start))))
- (replace result pending
- :start1 fill-ptr
- :end1 new-fill-ptr
- :start2 name-start
- :end2 name-end)
- (let ((kind (unix-file-kind (if (zerop name-end) "/" result) t)))
- (unless kind (return nil))
- (cond ((eq kind :link)
- (multiple-value-bind (link err) (unix-readlink result)
- (unless link
- (error "error reading link ~S: ~S"
- (subseq result 0 fill-ptr)
- (get-unix-error-msg err)))
- (cond ((or (zerop (length link))
- (char/= (schar link 0) #\/))
- ;; It's a relative link.
- (fill result (code-char 0)
- :start fill-ptr
- :end new-fill-ptr))
- ((string= result "/../" :end1 4)
- ;; It's across the super-root.
- (let ((slash (or (position #\/ result :start 4)
- 0)))
- (fill result (code-char 0)
- :start slash
- :end new-fill-ptr)
- (setf fill-ptr slash)))
- (t
- ;; It's absolute.
- (and (> (length link) 0)
- (char= (schar link 0) #\/))
- (fill result (code-char 0) :end new-fill-ptr)
- (setf fill-ptr 0)))
- (setf pending
- (if (= name-end len)
- link
- (concatenate 'simple-string
- link
- (subseq pending name-end))))
- (setf len (length pending))
- (setf name-start 0)))
- ((= name-end len)
- (return (subseq result 0 new-fill-ptr)))
- ((eq kind :directory)
- (setf (schar result new-fill-ptr) #\/)
- (setf fill-ptr (1+ new-fill-ptr))
- (setf name-start (1+ name-end)))
- (t
- (return nil))))))))))
-
-(defun unix-simplify-pathname (src)
- (declare (simple-string src))
- (let* ((src-len (length src))
- (dst (make-string src-len))
- (dst-len 0)
- (dots 0)
- (last-slash nil))
- (macrolet ((deposit (char)
- `(progn
- (setf (schar dst dst-len) ,char)
- (incf dst-len))))
- (dotimes (src-index src-len)
- (let ((char (schar src src-index)))
- (cond ((char= char #\.)
- (when dots
- (incf dots))
- (deposit char))
- ((char= char #\/)
- (case dots
- (0
- ;; Either ``/...' or ``...//...'
- (unless last-slash
- (setf last-slash dst-len)
- (deposit char)))
- (1
- ;; Either ``./...'' or ``..././...''
- (decf dst-len))
- (2
- ;; We've found ..
- (cond
- ((and last-slash (not (zerop last-slash)))
- ;; There is something before this ..
- (let ((prev-prev-slash
- (position #\/ dst :end last-slash :from-end t)))
- (cond ((and (= (+ (or prev-prev-slash 0) 2)
- last-slash)
- (char= (schar dst (- last-slash 2)) #\.)
- (char= (schar dst (1- last-slash)) #\.))
- ;; The something before this .. is another ..
- (deposit char)
- (setf last-slash dst-len))
- (t
- ;; The something is some directory or other.
- (setf dst-len
- (if prev-prev-slash
- (1+ prev-prev-slash)
- 0))
- (setf last-slash prev-prev-slash)))))
- (t
- ;; There is nothing before this .., so we need to keep it
- (setf last-slash dst-len)
- (deposit char))))
- (t
- ;; Something other than a dot between slashes.
- (setf last-slash dst-len)
- (deposit char)))
- (setf dots 0))
- (t
- (setf dots nil)
- (setf (schar dst dst-len) char)
- (incf dst-len))))))
- (when (and last-slash (not (zerop last-slash)))
- (case dots
- (1
- ;; We've got ``foobar/.''
- (decf dst-len))
- (2
- ;; We've got ``foobar/..''
- (unless (and (>= last-slash 2)
- (char= (schar dst (1- last-slash)) #\.)
- (char= (schar dst (- last-slash 2)) #\.)
- (or (= last-slash 2)
- (char= (schar dst (- last-slash 3)) #\/)))
- (let ((prev-prev-slash
- (position #\/ dst :end last-slash :from-end t)))
- (if prev-prev-slash
- (setf dst-len (1+ prev-prev-slash))
- (return-from unix-simplify-pathname "./")))))))
- (cond ((zerop dst-len)
- "./")
- ((= dst-len src-len)
- dst)
- (t
- (subseq dst 0 dst-len)))))
+ (declare (type simple-string pathname))
+ ;; KLUDGE: The Win32 platform doesn't have symbolic links, so
+ ;; short-cut this computation (and the check for being an absolute
+ ;; unix pathname...)
+ #!+win32 (return-from unix-resolve-links pathname)
+ (aver (not (relative-unix-pathname? pathname)))
+ ;; KLUDGE: readlink and lstat are unreliable if given symlinks
+ ;; ending in slashes -- fix the issue here instead of waiting for
+ ;; libc to change...
+ ;;
+ ;; but be careful! Must not strip the final slash from "/". (This
+ ;; adjustment might be a candidate for being transferred into the C
+ ;; code in a wrap_readlink() function, too.) CSR, 2006-01-18
+ (let ((len (length pathname)))
+ (when (and (> len 1) (eql #\/ (schar pathname (1- len))))
+ (setf pathname (subseq pathname 0 (1- len)))))
+ (/noshow "entering UNIX-RESOLVE-LINKS")
+ (loop with previous-pathnames = nil do
+ (/noshow pathname previous-pathnames)
+ (let ((link (unix-readlink pathname)))
+ (/noshow link)
+ ;; Unlike the old CMU CL code, we handle a broken symlink by
+ ;; returning the link itself. That way, CL:TRUENAME on a
+ ;; broken link returns the link itself, so that CL:DIRECTORY
+ ;; can return broken links, so that even without
+ ;; Unix-specific extensions to do interesting things with
+ ;; them, at least Lisp programs can see them and, if
+ ;; necessary, delete them. (This is handy e.g. when your
+ ;; managed-by-Lisp directories are visited by Emacs, which
+ ;; creates broken links as notes to itself.)
+ (if (null link)
+ (return pathname)
+ (let ((new-pathname
+ (simplify-namestring
+ (if (relative-unix-pathname? link)
+ (let* ((dir-len (1+ (position #\/
+ pathname
+ :from-end t)))
+ (dir (subseq pathname 0 dir-len)))
+ (/noshow dir)
+ (concatenate 'string dir link))
+ link))))
+ (if (unix-file-kind new-pathname)
+ (setf pathname new-pathname)
+ (return pathname)))))
+ ;; To generalize the principle that even if portable Lisp code
+ ;; can't do anything interesting with a broken symlink, at
+ ;; least it should be able to see and delete it, when we
+ ;; detect a cyclic link, we return the link itself. (So even
+ ;; though portable Lisp code can't do anything interesting
+ ;; with a cyclic link, at least it can see it and delete it.)
+ (if (member pathname previous-pathnames :test #'string=)
+ (return pathname)
+ (push pathname previous-pathnames))))
+\f
+;;; UNIX specific code, that has been cleanly separated from the
+;;; Windows build.
+#!-win32
+(progn
+ (defconstant micro-seconds-per-internal-time-unit
+ (/ 1000000 sb!xc:internal-time-units-per-second))
+
+ (declaim (inline system-internal-real-time system-internal-run-time))
+ (defun system-internal-real-time ()
+ (multiple-value-bind (ignore seconds useconds) (unix-gettimeofday)
+ (declare (ignore ignore) (type (unsigned-byte 32) seconds useconds))
+ (let ((uint (truncate useconds
+ micro-seconds-per-internal-time-unit)))
+ (declare (type (unsigned-byte 32) uint))
+ (+ (* seconds sb!xc:internal-time-units-per-second)
+ uint))))
+
+ (defun system-internal-run-time ()
+ (multiple-value-bind (ignore utime-sec utime-usec stime-sec stime-usec)
+ (unix-fast-getrusage rusage_self)
+ (declare (ignore ignore)
+ (type (unsigned-byte 31) utime-sec stime-sec)
+ ;; (Classic CMU CL had these (MOD 1000000) instead, but
+ ;; at least in Linux 2.2.12, the type doesn't seem to
+ ;; be documented anywhere and the observed behavior is
+ ;; to sometimes return 1000000 exactly.)
+ (type (integer 0 1000000) utime-usec stime-usec))
+ (let ((result (+ (* (+ utime-sec stime-sec)
+ sb!xc:internal-time-units-per-second)
+ (floor (+ utime-usec
+ stime-usec
+ (floor micro-seconds-per-internal-time-unit 2))
+ micro-seconds-per-internal-time-unit))))
+ result))))
+\f
+;;;; A magic constant for wait3().
+;;;;
+;;;; FIXME: This used to be defined in run-program.lisp as
+;;;; (defconstant wait-wstopped #-svr4 #o177 #+svr4 wait-wuntraced)
+;;;; According to some of the man pages, the #o177 is part of the API
+;;;; for wait3(); that said, under SunOS there is a WSTOPPED thing in
+;;;; the headers that may or may not be the same thing. To be
+;;;; investigated. -- CSR, 2002-03-25
+(defconstant wstopped #o177)
+
\f
;;;; stuff not yet found in the header files
;;;;
;;; not checked for linux...
(defmacro fd-set (offset fd-set)
(let ((word (gensym))
- (bit (gensym)))
- `(multiple-value-bind (,word ,bit) (floor ,offset 32)
+ (bit (gensym)))
+ `(multiple-value-bind (,word ,bit) (floor ,offset
+ sb!vm:n-machine-word-bits)
(setf (deref (slot ,fd-set 'fds-bits) ,word)
- (logior (truly-the (unsigned-byte 32) (ash 1 ,bit))
- (deref (slot ,fd-set 'fds-bits) ,word))))))
+ (logior (truly-the (unsigned-byte #.sb!vm:n-machine-word-bits)
+ (ash 1 ,bit))
+ (deref (slot ,fd-set 'fds-bits) ,word))))))
;;; not checked for linux...
(defmacro fd-clr (offset fd-set)
(let ((word (gensym))
- (bit (gensym)))
- `(multiple-value-bind (,word ,bit) (floor ,offset 32)
+ (bit (gensym)))
+ `(multiple-value-bind (,word ,bit) (floor ,offset
+ sb!vm:n-machine-word-bits)
(setf (deref (slot ,fd-set 'fds-bits) ,word)
- (logand (deref (slot ,fd-set 'fds-bits) ,word)
- (sb!kernel:32bit-logical-not
- (truly-the (unsigned-byte 32) (ash 1 ,bit))))))))
+ (logand (deref (slot ,fd-set 'fds-bits) ,word)
+ (sb!kernel:word-logical-not
+ (truly-the (unsigned-byte #.sb!vm:n-machine-word-bits)
+ (ash 1 ,bit))))))))
;;; not checked for linux...
(defmacro fd-isset (offset fd-set)
(let ((word (gensym))
- (bit (gensym)))
- `(multiple-value-bind (,word ,bit) (floor ,offset 32)
+ (bit (gensym)))
+ `(multiple-value-bind (,word ,bit) (floor ,offset
+ sb!vm:n-machine-word-bits)
(logbitp ,bit (deref (slot ,fd-set 'fds-bits) ,word)))))
;;; not checked for linux...
(defmacro fd-zero (fd-set)
`(progn
- ,@(loop for index upfrom 0 below (/ fd-setsize 32)
- collect `(setf (deref (slot ,fd-set 'fds-bits) ,index) 0))))
+ ,@(loop for index upfrom 0 below (/ fd-setsize sb!vm:n-machine-word-bits)
+ collect `(setf (deref (slot ,fd-set 'fds-bits) ,index) 0))))
-(/show0 "unix.lisp 3555")
projects / sbcl.git / blobdiff