X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Funix.lisp;h=be0e22824945902fb1470e62f9e86b4e0c528d73;hb=8bb8f286dbacf1792a26de693c795d268516672c;hp=f39dd9735b18bc987297dc4d960b9d886034ac90;hpb=dfa55a883f94470267b626dae77ce7e7dfac3df6;p=sbcl.git diff --git a/src/code/unix.lisp b/src/code/unix.lisp index f39dd97..be0e228 100644 --- a/src/code/unix.lisp +++ b/src/code/unix.lisp @@ -29,8 +29,8 @@ (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 @@ -41,9 +41,9 @@ (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))))))) ;;;; Lisp types used by syscalls @@ -64,21 +64,25 @@ ;;; 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 (strerror)) - ,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") @@ -87,18 +91,41 @@ (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)) ;;;; 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)) ;;; 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)) @@ -107,38 +134,27 @@ (/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 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: 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)) -(def-alien-type nil +(define-alien-type nil (struct fd-set - (fds-bits (array fd-mask #.(/ fd-setsize 32))))) + (fds-bits (array fd-mask #.(/ fd-setsize + sb!vm:n-machine-word-bits))))) (/show0 "unix.lisp 304") ;;;; fcntl.h ;;;; -;;;; POSIX Standard: 6.5 File Control Operations +;;;; POSIX Standard: 6.5 File Control Operations ;;; Open the file whose pathname is specified by PATH for reading ;;; and/or writing as specified by the FLAGS argument. Various FLAGS @@ -149,9 +165,14 @@ ;;; 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. @@ -164,10 +185,19 @@ ;; 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 ;;;; resourcebits.h @@ -175,69 +205,50 @@ (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 - - -;;;; runtime/stat-wrapper.h + (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 -;;; this looks like "struct stat" according to stat(2). It may not -;;; correspond to the real in-memory stat structure that the syscall -;;; uses, and if it doesn't, shouldn't. Linux in particular is packed -;;; full of stat macros, so we do this stuff in runtime/stat-wrapper.c - -;;; 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's support -;;; those. We don't actually access that field anywhere, though, so until -;;; we can get 64 bit alien support it'll do - -(def-alien-type nil - (struct stat - (st-dev unsigned-long) ;would be dev-t in a real stat - (st-ino ino-t) - (st-mode mode-t) - (st-nlink nlink-t) - (st-uid uid-t) - (st-gid gid-t) - (st-rdev unsigned-long) ;ditto - (st-size off-t) - (st-blksize unsigned-long) - (st-blocks unsigned-long) - (st-atime time-t) - (st-mtime time-t) - (st-ctime time-t))) - ;;;; unistd.h ;;; 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) (declare (type unix-pathname path) - (type (mod 8) mode)) + (type (mod 8) mode)) (void-syscall ("access" c-string int) path mode)) ;;; values for the second argument to UNIX-LSEEK @@ -245,22 +256,28 @@ (defconstant l_incr 1) ; to increment the file pointer (defconstant l_xtnd 2) ; to extend the file size -;;; Accept a file descriptor and move the file pointer ahead -;;; a certain offset for that file. 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. +;;; Is a stream interactive? +(defun unix-isatty (fd) + (declare (type unix-fd fd)) + (int-syscall ("isatty" int) fd)) + (defun unix-lseek (fd offset whence) + "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. + " (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 @@ -268,56 +285,105 @@ ;;; bytes read. (defun unix-read (fd buf len) (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) (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)) + 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))))) + (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))) -;;; UNIX-CHDIR accepts a directory name and makes that the -;;; current working directory. -(defun unix-chdir (path) - (declare (type unix-pathname path)) - (void-syscall ("chdir" c-string) path)) - -;;; Return the current directory as a SIMPLE-STRING. -(defun unix-current-directory () - ;; 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)))) +;; 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 @@ -334,183 +400,198 @@ (void-syscall ("exit" int) code)) ;;; Return the process id of the current process. -(def-alien-routine ("getpid" unix-getpid) int) - -;;; Return the real user-id associated with the current process. -(def-alien-routine ("getuid" unix-getuid) int) - -;;; Invoke readlink(2) on the file name specified by the simple string -;;; PATH. Return up to two values: the contents of the symbolic link -;;; if the call is successful, or NIL and the Unix error number. +(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) (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. +;;; name and the file if this is the last link. (defun unix-unlink (name) (declare (type unix-pathname name)) (void-syscall ("unlink" c-string) name)) -;;; Set the tty-process-group for the unix file-descriptor FD to PGRP. -;;; If not supplied, FD defaults to "/dev/tty". -(defun %set-tty-process-group (pgrp &optional fd) - (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 () (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"))) -;;; Write the core image of the file described by FD to disk. -(defun unix-fsync (fd) - (declare (type unix-fd fd)) - (void-syscall ("fsync" int) fd)) - ;;;; 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) (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)) ;;;; sys/resource.h ;;; FIXME: All we seem to need is the RUSAGE_SELF version of this. ;;; -;;; Like getrusage(2), but return only the system and user time, -;;; and return the seconds and microseconds as separate values. +;;; 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) (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) (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)))) ;;;; 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)) - (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)) @@ -518,128 +599,166 @@ (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)))))) ;;;; 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 ; result - (slot ,buf 'st-dev) - (slot ,buf 'st-ino) - (slot ,buf 'st-mode) - (slot ,buf 'st-nlink) - (slot ,buf 'st-uid) - (slot ,buf 'st-gid) - (slot ,buf 'st-rdev) - (slot ,buf 'st-size) - (slot ,buf 'st-atime) - (slot ,buf 'st-mtime) - (slot ,buf 'st-ctime) - (slot ,buf 'st-blksize) - (slot ,buf 'st-blocks))) - -;;; Retrieve 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. +;;; 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) (declare (type unix-pathname name)) - (when (string= name "") - (setf name ".")) - (with-alien ((buf (struct stat))) - (syscall ("stat_wrapper" c-string (* (struct stat))) - (extract-stat-results buf) - name (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 identical to unix-stat, except if NAME is - a symlink, in which case it returns information about the - link itself rather than dereferencing it." (declare (type unix-pathname name)) - (with-alien ((buf (struct stat))) - (syscall ("lstat_wrapper" c-string (* (struct stat))) - (extract-stat-results buf) - name (addr buf)))) - -;;; like UNIX-STAT except the file is specified by the file descriptor FD + (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 stat))) - (syscall ("fstat_wrapper" int (* (struct stat))) - (extract-stat-results buf) - fd (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) - (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 ("fstat_wrapper" int (* (struct wrapped_stat))) + (%extract-stat-results (addr buf)) + fd (addr buf)))) ;;;; 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))) ;;;; 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 @@ -648,24 +767,87 @@ #!-sb-fluid (declaim (inline unix-gettimeofday)) (defun unix-gettimeofday () (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)))) -(defconstant ENOENT 2) ; Unix error code, "No such file or directory" -(defconstant EINTR 4) ; Unix error code, "Interrupted system call" -(defconstant EIO 5) ; Unix error code, "I/O error" -(defconstant EEXIST 17) ; Unix error code, "File exists" -(defconstant ESPIPE 29) ; Unix error code, "Illegal seek" -(defconstant EWOULDBLOCK 11) ; Unix error code, "Operation would block" +;; 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 from now. INTERVAL, + when non-zero, is 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)))))) + + ;;; 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 @@ -673,7 +855,6 @@ ;;; enough of them all in one place here that they should probably be ;;; removed by hand. - ;;;; support routines for dealing with Unix pathnames (defun unix-file-kind (name &optional check-for-links) @@ -683,177 +864,128 @@ (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. -;;; -;;; FIXME: Could we just use Unix readlink(2) instead? + (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 'simple-file-error - :pathname pathname - :format-control - "~@" - :format-arguments (list (subseq - result 0 fill-ptr) - (strerror 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)))) + +;;; 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)))) + +;;;; 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) + ;;;; stuff not yet found in the header files ;;;; @@ -862,33 +994,37 @@ ;;; 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))))