X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;ds=sidebyside;f=src%2Fcode%2Funix.lisp;h=a25597930a4de581e70dae54b4d1fa3d57270f07;hb=50f728671defadb8f7b1e8691c984cb0e6aba17c;hp=00351346f4680a86c57aa0bf0be19651961372b6;hpb=0d669e68a1ffbea42af6216f2ae8c7d7ca12ffb6;p=sbcl.git diff --git a/src/code/unix.lisp b/src/code/unix.lisp index 0035134..a255979 100644 --- a/src/code/unix.lisp +++ b/src/code/unix.lisp @@ -47,7 +47,7 @@ ;;;; Lisp types used by syscalls -(deftype unix-pathname () 'simple-string) +(deftype unix-pathname () 'simple-base-string) (deftype unix-fd () `(integer 0 ,most-positive-fixnum)) (deftype unix-file-mode () '(unsigned-byte 32)) @@ -282,22 +282,22 @@ ;; pointer is used. On a system which doesn't support that ;; extension, it'll have to be rewritten somehow. ;; - ;; SunOS provides almost as useful an extension: if given a null + ;; 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. - #!-(or linux openbsd freebsd sunos) (,stub,) - #!+(or linux openbsd freebsd sunos) + #!-(or linux openbsd freebsd sunos osf1) (,stub,) + #!+(or linux openbsd freebsd sunos osf1) (or (newcharstar-string (alien-funcall (extern-alien "getcwd" (function (* char) (* char) size-t)) nil #!+(or linux openbsd freebsd) 0 - #!+sunos 1025)) + #!+(or sunos osf1) 1025)) (simple-perror "getcwd"))) ;;; Return the Unix current directory as a SIMPLE-STRING terminated @@ -348,6 +348,14 @@ uid)) (error "found no match for Unix uid=~S" uid))) +;;; Return the namestring of the home directory, being careful to +;;; include a trailing #\/ +(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. @@ -677,6 +685,98 @@ (addr tz)))) +;; 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) + +(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)))))) + +(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)))))) + +(defmacro with-timeout (expires &body body) + "Execute the body, interrupting it with a SIGALRM after at least +EXPIRES seconds have passed. Uses Unix setitimer(), restoring any +previous timer after the body has finished executing" + (let ((saved-seconds (gensym "SAVED-SECONDS")) + (saved-useconds (gensym "SAVED-USECONDS")) + (s (gensym "S")) (u (gensym "U"))) + `(let (- ,saved-seconds ,saved-useconds) + (multiple-value-setq (- - - ,saved-seconds ,saved-useconds) + (unix-getitimer :real)) + (multiple-value-bind (,s ,u) (floor ,expires) + (setf ,u (floor (* ,u 1000000))) + (if (and (> ,expires 0) + (or (and (zerop ,saved-seconds) (zerop ,saved-useconds)) + (> ,saved-seconds ,s) + (and (= ,saved-seconds ,s) + (> ,saved-useconds ,u)))) + (unwind-protect + (progn + (unix-setitimer :real 0 0 ,s ,u) + ,@body) + (unix-setitimer :real 0 0 ,saved-seconds ,saved-useconds)) + ,@body))))) + + + (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" @@ -696,7 +796,7 @@ (defun unix-file-kind (name &optional check-for-links) #!+sb-doc "Return either :FILE, :DIRECTORY, :LINK, :SPECIAL, or NIL." - (declare (simple-string name)) + (declare (simple-base-string name)) (multiple-value-bind (res dev ino mode) (if check-for-links (unix-lstat name) (unix-stat name)) (declare (type (or fixnum null) mode)