X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=contrib%2Fsb-posix%2Fposix-tests.lisp;h=02dee2be79648c8d17834b6ce820d258a0195780;hb=0f234877047c56ca945fe54e9e77a9cc2c8141cb;hp=5c16e7aae8a9c42d6e9c05975a9a499d2ed7ce3c;hpb=794cf077e3b1d4368f1103f393a4a56abd09e72a;p=sbcl.git

diff --git a/contrib/sb-posix/posix-tests.lisp b/contrib/sb-posix/posix-tests.lisp
index 5c16e7a..02dee2b 100644
--- a/contrib/sb-posix/posix-tests.lisp
+++ b/contrib/sb-posix/posix-tests.lisp
@@ -6,23 +6,27 @@
 (defvar *test-directory*
   (ensure-directories-exist
    (merge-pathnames (make-pathname :directory '(:relative "test-lab"))
-		    (make-pathname :directory
-				   (pathname-directory *load-truename*)))))
+                    (make-pathname :directory
+                                   (pathname-directory *load-truename*)))))
 
 (defvar *current-directory* *default-pathname-defaults*)
 
 (defvar *this-file* *load-truename*)
 
 (eval-when (:compile-toplevel :load-toplevel)
-  (defconstant +mode-rwx-all+ (logior sb-posix::s-irusr sb-posix::s-iwusr sb-posix::s-ixusr
-				      sb-posix::s-irgrp sb-posix::s-iwgrp sb-posix::s-ixgrp
-				      sb-posix::s-iroth sb-posix::s-iwoth sb-posix::s-ixoth)))
+  (defconstant +mode-rwx-all+
+    (logior sb-posix::s-irusr sb-posix::s-iwusr sb-posix::s-ixusr
+            #-win32
+            (logior
+             sb-posix::s-irgrp sb-posix::s-iwgrp sb-posix::s-ixgrp
+             sb-posix::s-iroth sb-posix::s-iwoth sb-posix::s-ixoth))))
 
 (defmacro define-eacces-test (name form &rest values)
+  #-win32
   `(deftest ,name
     (block ,name
       (when (= (sb-posix:geteuid) 0)
-	(return-from ,name (values ,@values)))
+        (return-from ,name (values ,@values)))
       ,form)
     ,@values))
 
@@ -31,19 +35,19 @@
   0)
 
 (deftest chdir.2
-  (sb-posix:chdir (namestring *test-directory*))
+    (sb-posix:chdir (namestring *test-directory*))
   0)
 
 (deftest chdir.3
-  (sb-posix:chdir "/")
+    (sb-posix:chdir "/")
   0)
 
 (deftest chdir.4
-  (sb-posix:chdir #p"/")
+    (sb-posix:chdir #p"/")
   0)
 
 (deftest chdir.5
-  (sb-posix:chdir *current-directory*)
+    (sb-posix:chdir *current-directory*)
   0)
 
 (deftest chdir.6
@@ -61,9 +65,9 @@
 (deftest chdir.error.1
   (let ((dne (make-pathname :directory '(:relative "chdir.does-not-exist"))))
     (handler-case
-	(sb-posix:chdir (merge-pathnames dne *test-directory*))
+        (sb-posix:chdir (merge-pathnames dne *test-directory*))
       (sb-posix:syscall-error (c)
-	(sb-posix:syscall-errno c))))
+        (sb-posix:syscall-errno c))))
   #.sb-posix::enoent)
 
 (deftest chdir.error.2
@@ -71,12 +75,15 @@
       (sb-posix:chdir *this-file*)
     (sb-posix:syscall-error (c)
       (sb-posix:syscall-errno c)))
-  #.sb-posix::enotdir)
+  #-win32
+  #.sb-posix:enotdir
+  #+win32
+  #.sb-posix:einval)
 
 (deftest mkdir.1
   (let ((dne (make-pathname :directory '(:relative "mkdir.does-not-exist.1"))))
     (unwind-protect
-	 (sb-posix:mkdir (merge-pathnames dne *test-directory*) 0)
+         (sb-posix:mkdir (merge-pathnames dne *test-directory*) 0)
       ;; FIXME: no delete-directory in CL, but using our own operators
       ;; is probably not ideal
       (ignore-errors (sb-posix:rmdir (merge-pathnames dne *test-directory*)))))
@@ -85,7 +92,7 @@
 (deftest mkdir.2
   (let ((dne (make-pathname :directory '(:relative "mkdir.does-not-exist.2"))))
     (unwind-protect
-	 (sb-posix:mkdir (namestring (merge-pathnames dne *test-directory*)) 0)
+         (sb-posix:mkdir (namestring (merge-pathnames dne *test-directory*)) 0)
       (ignore-errors (sb-posix:rmdir (merge-pathnames dne *test-directory*)))))
   0)
 
@@ -98,28 +105,31 @@
 
 (deftest mkdir.error.2
   (handler-case
-      (sb-posix:mkdir "/" 0)
+      (sb-posix:mkdir #-win32 "/" #+win32 "C:/" 0)
     (sb-posix:syscall-error (c)
       (sb-posix:syscall-errno c)))
-  #.sb-posix::eexist)
+  #-win32
+  #.sb-posix::eexist
+  #+win32
+  #.sb-posix:eacces)
 
 (define-eacces-test mkdir.error.3
   (let* ((dir (merge-pathnames
-	       (make-pathname :directory '(:relative "mkdir.error.3"))
-	       *test-directory*))
-	 (dir2 (merge-pathnames
-		(make-pathname :directory '(:relative "does-not-exist"))
-		dir)))
+               (make-pathname :directory '(:relative "mkdir.error.3"))
+               *test-directory*))
+         (dir2 (merge-pathnames
+                (make-pathname :directory '(:relative "does-not-exist"))
+                dir)))
     (sb-posix:mkdir dir 0)
     (handler-case
-	(sb-posix:mkdir dir2 0)
+        (sb-posix:mkdir dir2 0)
       (sb-posix:syscall-error (c)
-	(sb-posix:rmdir dir)
-	(sb-posix:syscall-errno c))
+        (sb-posix:rmdir dir)
+        (sb-posix:syscall-errno c))
       (:no-error (result)
-	(sb-posix:rmdir dir2)
-	(sb-posix:rmdir dir)
-	result)))
+        (sb-posix:rmdir dir2)
+        (sb-posix:rmdir dir)
+        result)))
   #.sb-posix::eacces)
 
 (deftest rmdir.1
@@ -136,10 +146,10 @@
 
 (deftest rmdir.error.1
   (let ((dne (make-pathname :directory '(:relative "rmdir.dne.error.1"))))
-    (handler-case 
-	(sb-posix:rmdir (merge-pathnames dne *test-directory*))
+    (handler-case
+        (sb-posix:rmdir (merge-pathnames dne *test-directory*))
       (sb-posix:syscall-error (c)
-	(sb-posix:syscall-errno c))))
+        (sb-posix:syscall-errno c))))
   #.sb-posix::enoent)
 
 (deftest rmdir.error.2
@@ -147,85 +157,95 @@
       (sb-posix:rmdir *this-file*)
     (sb-posix:syscall-error (c)
       (sb-posix:syscall-errno c)))
-  #.sb-posix::enotdir)
+  #-win32
+  #.sb-posix::enotdir
+  #+win32
+  #.sb-posix::einval)
 
 (deftest rmdir.error.3
   (handler-case
-      (sb-posix:rmdir "/")
+      (sb-posix:rmdir #-win32 "/" #+win32 "C:/")
     (sb-posix:syscall-error (c)
       (sb-posix:syscall-errno c)))
-  #.sb-posix::ebusy)
+  #-win32
+  #.sb-posix::ebusy
+  #+win32
+  #.sb-posix::eacces)
 
 (deftest rmdir.error.4
   (let* ((dir (ensure-directories-exist
-	       (merge-pathnames
-		(make-pathname :directory '(:relative "rmdir.error.4"))
-		*test-directory*)))
-	 (file (make-pathname :name "foo" :defaults dir)))
-    (with-open-file (s file :direction :output)
+               (merge-pathnames
+                (make-pathname :directory '(:relative "rmdir.error.4"))
+                *test-directory*)))
+         (file (make-pathname :name "foo" :defaults dir)))
+    (with-open-file (s file :direction :output :if-exists nil)
       (write "" :stream s))
     (handler-case
-	(sb-posix:rmdir dir)
+        (sb-posix:rmdir dir)
       (sb-posix:syscall-error (c)
-	(delete-file file)
-	(sb-posix:rmdir dir)
-	(let ((errno (sb-posix:syscall-errno c)))
-	  ;; documented by POSIX
-	  (or (= errno sb-posix::eexist) (= errno sb-posix::enotempty))))))
+        (delete-file file)
+        (sb-posix:rmdir dir)
+        (let ((errno (sb-posix:syscall-errno c)))
+          ;; documented by POSIX
+          (or (= errno sb-posix::eexist) (= errno sb-posix::enotempty))))))
   t)
 
 (define-eacces-test rmdir.error.5
   (let* ((dir (merge-pathnames
-	       (make-pathname :directory '(:relative "rmdir.error.5"))
-	       *test-directory*))
-	 (dir2 (merge-pathnames
-		(make-pathname :directory '(:relative "unremovable"))
-		dir)))
+               (make-pathname :directory '(:relative "rmdir.error.5"))
+               *test-directory*))
+         (dir2 (merge-pathnames
+                (make-pathname :directory '(:relative "unremovable"))
+                dir)))
     (sb-posix:mkdir dir +mode-rwx-all+)
     (sb-posix:mkdir dir2 +mode-rwx-all+)
     (sb-posix:chmod dir 0)
     (handler-case
-	(sb-posix:rmdir dir2)
+        (sb-posix:rmdir dir2)
       (sb-posix:syscall-error (c)
-	(sb-posix:chmod dir (logior sb-posix::s-iread sb-posix::s-iwrite sb-posix::s-iexec))
-	(sb-posix:rmdir dir2)
-	(sb-posix:rmdir dir)
-	(sb-posix:syscall-errno c))
+        (sb-posix:chmod dir (logior sb-posix::s-iread sb-posix::s-iwrite sb-posix::s-iexec))
+        (sb-posix:rmdir dir2)
+        (sb-posix:rmdir dir)
+        (sb-posix:syscall-errno c))
       (:no-error (result)
-	(sb-posix:chmod dir (logior sb-posix::s-iread sb-posix::s-iwrite sb-posix::s-iexec))
-	(sb-posix:rmdir dir)
-	result)))
+        (sb-posix:chmod dir (logior sb-posix::s-iread sb-posix::s-iwrite sb-posix::s-iexec))
+        (sb-posix:rmdir dir)
+        result)))
   #.sb-posix::eacces)
 
 (deftest stat.1
   (let* ((stat (sb-posix:stat *test-directory*))
-	 (mode (sb-posix::stat-mode stat)))
+         (mode (sb-posix::stat-mode stat)))
     ;; FIXME: Ugly ::s everywhere
     (logand mode (logior sb-posix::s-iread sb-posix::s-iwrite sb-posix::s-iexec)))
   #.(logior sb-posix::s-iread sb-posix::s-iwrite sb-posix::s-iexec))
 
+#-win32
 (deftest stat.2
   (let* ((stat (sb-posix:stat "/"))
-	 (mode (sb-posix::stat-mode stat)))
+         (mode (sb-posix::stat-mode stat)))
     ;; it's logically possible for / to be writeable by others... but
     ;; if it is, either someone is playing with strange security
     ;; modules or they want to know about it anyway.
     (logand mode sb-posix::s-iwoth))
   0)
-    
+
 (deftest stat.3
   (let* ((now (get-universal-time))
-	 ;; FIXME: (encode-universal-time 00 00 00 01 01 1970)
-	 (unix-now (- now 2208988800))
-	 (stat (sb-posix:stat *test-directory*))
-	 (atime (sb-posix::stat-atime stat)))
+         ;; FIXME: (encode-universal-time 00 00 00 01 01 1970)
+         (unix-now (- now 2208988800))
+         (stat (sb-posix:stat *test-directory*))
+         #+darwin (atime (sb-alien:slot (sb-posix:stat-atime stat) 'sb-posix::tv-sec))
+         #-darwin (atime (sb-posix::stat-atime stat)))
     ;; FIXME: breaks if mounted noatime :-(
+    #+nil (< (- atime unix-now) 10)
     (< (- atime unix-now) 10))
   t)
 
+#-win32
 (deftest stat.4
   (let* ((stat (sb-posix:stat (make-pathname :directory '(:absolute :up))))
-	 (mode (sb-posix::stat-mode stat)))
+         (mode (sb-posix::stat-mode stat)))
     ;; it's logically possible for / to be writeable by others... but
     ;; if it is, either someone is playing with strange security
     ;; modules or they want to know about it anyway.
@@ -243,27 +263,27 @@
 
 (define-eacces-test stat.error.2
   (let* ((dir (merge-pathnames
-	       (make-pathname :directory '(:relative "stat.error.2"))
-	       *test-directory*))
-	 (file (merge-pathnames
-		(make-pathname :name "unstatable")
-		dir)))
+               (make-pathname :directory '(:relative "stat.error.2"))
+               *test-directory*))
+         (file (merge-pathnames
+                (make-pathname :name "unstatable")
+                dir)))
     (sb-posix:mkdir dir +mode-rwx-all+)
     (with-open-file (s file :direction :output)
       (write "" :stream s))
     (sb-posix:chmod dir 0)
     (handler-case
-	(sb-posix:stat file)
+        (sb-posix:stat file)
       (sb-posix:syscall-error (c)
-	(sb-posix:chmod dir (logior sb-posix::s-iread sb-posix::s-iwrite sb-posix::s-iexec))
-	(sb-posix:unlink file)
-	(sb-posix:rmdir dir)
-	(sb-posix:syscall-errno c))
+        (sb-posix:chmod dir (logior sb-posix::s-iread sb-posix::s-iwrite sb-posix::s-iexec))
+        (sb-posix:unlink file)
+        (sb-posix:rmdir dir)
+        (sb-posix:syscall-errno c))
       (:no-error (result)
-	(sb-posix:chmod dir (logior sb-posix::s-iread sb-posix::s-iwrite sb-posix::s-iexec))
-	(sb-posix:unlink file)
-	(sb-posix:rmdir dir)
-	result)))
+        (sb-posix:chmod dir (logior sb-posix::s-iread sb-posix::s-iwrite sb-posix::s-iexec))
+        (sb-posix:unlink file)
+        (sb-posix:rmdir dir)
+        result)))
   #.sb-posix::eacces)
 
 ;;; stat-mode tests
@@ -304,11 +324,13 @@
     (sb-posix:s-isfifo mode))
   nil)
 
+#-win32
 (deftest stat-mode.6
   (with-stat-mode (mode *test-directory*)
     (sb-posix:s-issock mode))
   nil)
 
+#-win32
 (deftest stat-mode.7
   (let ((link-pathname (make-pathname :name "stat-mode.7"
                                       :defaults *test-directory*)))
@@ -336,7 +358,9 @@
 (deftest filename-designator.1
   (let ((file (format nil "~A/[foo].txt" (namestring *test-directory*))))
     ;; creat() with a string as argument
-    (sb-posix:creat file 0)
+    (let ((fd (sb-posix:creat file sb-posix:s-iwrite)))
+      #+win32
+      (sb-posix:close fd))
     ;; if this test fails, it will probably be with
     ;; "System call error 2 (No such file or directory)"
     (let ((*default-pathname-defaults* *test-directory*))
@@ -344,30 +368,46 @@
   0)
 
 (deftest open.1
-  (let ((fd (sb-posix:open *test-directory* sb-posix::o-rdonly)))
-    (ignore-errors (sb-posix:close fd))
-    (< fd 0))
+    (let ((name (merge-pathnames "open-test.txt" *test-directory*)))
+      (unwind-protect
+           (progn
+             (sb-posix:close
+              (sb-posix:creat name (logior sb-posix:s-iwrite sb-posix:s-iread)))
+             (let ((fd (sb-posix:open name sb-posix::o-rdonly)))
+               (ignore-errors (sb-posix:close fd))
+               (< fd 0)))
+        (ignore-errors (sb-posix:unlink name))))
   nil)
 
 (deftest open.error.1
   (handler-case (sb-posix:open *test-directory* sb-posix::o-wronly)
     (sb-posix:syscall-error (c)
       (sb-posix:syscall-errno c)))
-  #.sb-posix::eisdir)
+  #-win32
+  #.sb-posix::eisdir
+  #+win32
+  #.sb-posix:eacces)
 
+#-(or (and x86-64 linux) win32)
 (deftest fcntl.1
   (let ((fd (sb-posix:open "/dev/null" sb-posix::o-nonblock)))
     (= (sb-posix:fcntl fd sb-posix::f-getfl) sb-posix::o-nonblock))
   t)
-
+;; On AMD64/Linux O_LARGEFILE is always set, even though the whole
+;; flag makes no sense.
+#+(and x86-64 linux)
+(deftest fcntl.1
+  (let ((fd (sb-posix:open "/dev/null" sb-posix::o-nonblock)))
+    (/= 0 (logand (sb-posix:fcntl fd sb-posix::f-getfl)
+                  sb-posix::o-nonblock)))
+  t)
 
 (deftest opendir.1
   (let ((dir (sb-posix:opendir "/")))
-    (if (sb-alien:null-alien dir)
-	(progn  (sb-posix:closedir dir)
-		t)
-	nil))
-  t)
+    (unwind-protect (sb-alien:null-alien dir)
+      (unless (sb-alien:null-alien dir)
+        (sb-posix:closedir dir))))
+  nil)
 
 (deftest readdir.1
   (let ((dir (sb-posix:opendir "/")))
@@ -380,3 +420,228 @@
                finally (return t)))
       (sb-posix:closedir dir)))
   t)
+
+(deftest readdir/dirent-name
+    (let ((dir (sb-posix:opendir *current-directory*)))
+      (unwind-protect
+           (equal (sort (loop for entry = (sb-posix:readdir dir)
+                           until (sb-alien:null-alien entry)
+                           collect (sb-posix:dirent-name entry))
+                        #'string<)
+                  (sort (append '("." "..")
+                                (mapcar (lambda (p)
+                                          (let ((string (enough-namestring p *current-directory*)))
+                                            (if (pathname-name p)
+                                                string
+                                                (subseq string 0 (1- (length string))))))
+                                        (directory (make-pathname
+                                                    :name :wild
+                                                    :type :wild
+                                                    :defaults *current-directory*))))
+                        #'string<))
+        (sb-posix:closedir dir)))
+  t)
+
+#-win32
+(deftest pwent.1
+  ;; make sure that we found something
+  (not (sb-posix:getpwuid 0))
+  nil)
+
+#-win32
+(deftest pwent.2
+  ;; make sure that we found something
+  (not (sb-posix:getpwnam "root"))
+  nil)
+
+#+nil
+;; Requires root or special group + plus a sensible thing on the port
+(deftest cfget/setispeed.1
+    (with-open-file (s "/dev/ttyS0")
+      (let* ((termios (sb-posix:tcgetattr s))
+             (old (sb-posix:cfgetispeed termios))
+             (new (if (= old sb-posix:b2400)
+                      sb-posix:b9600
+                      sb-posix:b2400)))
+        (sb-posix:cfsetispeed new termios)
+        (sb-posix:tcsetattr 0 sb-posix:tcsadrain termios)
+        (setf termios (sb-posix:tcgetattr s))
+        (= new (sb-posix:cfgetispeed termios))))
+  t)
+
+#+nil
+;; Requires root or special group + a sensible thing on the port
+(deftest cfget/setospeed.1
+    (with-open-file (s "/dev/ttyS0" :direction :output :if-exists :append)
+      (let* ((termios (sb-posix:tcgetattr s))
+             (old (sb-posix:cfgetospeed termios))
+             (new (if (= old sb-posix:b2400)
+                      sb-posix:b9600
+                      sb-posix:b2400)))
+        (sb-posix:cfsetospeed new termios)
+        (sb-posix:tcsetattr 0 sb-posix:tcsadrain termios)
+        (setf termios (sb-posix:tcgetattr 0))
+        (= new (sb-posix:cfgetospeed termios))))
+  t)
+
+
+#-win32
+(deftest time.1
+    (plusp (sb-posix:time))
+  t)
+
+;;; CLH: FIXME! For darwin atime and mtime return a timespec. This
+;;; _should_ work, but it doesn't. For some reason mtime is always
+;;; 0. Comment the mtime test out for the moment.
+#+darwin
+(deftest utime.1
+    (let ((file (merge-pathnames #p"utime.1" *test-directory*))
+          (atime (random (1- (expt 2 31))))
+          (mtime (random (1- (expt 2 31)))))
+      (with-open-file (stream file
+                       :direction :output
+                       :if-exists :supersede
+                       :if-does-not-exist :create)
+        (princ "Hello, utime" stream))
+      (sb-posix:utime file atime mtime)
+      (let* ((stat (sb-posix:stat file)))
+        (delete-file file)
+        (list (= (sb-alien:slot (sb-posix:stat-atime stat) 'sb-posix::tv-sec) atime)
+              #+nil (= (sb-alien:slot (sb-posix:stat-mtime stat) 'sb-posix::tv-sec) mtime))))
+  (t #+nil t))
+
+#-(or win32 darwin)
+(deftest utimes.1
+    (let ((file (merge-pathnames #p"utimes.1" *test-directory*))
+          (atime (random (1- (expt 2 31))))
+          (mtime (random (1- (expt 2 31)))))
+      (with-open-file (stream file
+                       :direction :output
+                       :if-exists :supersede
+                       :if-does-not-exist :create)
+        (princ "Hello, utimes" stream))
+      (sb-posix:utime file atime mtime)
+      (let* ((stat (sb-posix:stat file)))
+        (delete-file file)
+        (list (= (sb-posix:stat-atime stat) atime)
+              (= (sb-posix:stat-mtime stat) mtime))))
+  (t t))
+
+;; readlink tests.
+#-win32
+(progn
+  (deftest readlink.1
+      (let ((link-pathname (make-pathname :name "readlink.1"
+                                          :defaults *test-directory*)))
+        (sb-posix:symlink "/" link-pathname)
+        (unwind-protect
+             (sb-posix:readlink link-pathname)
+          (ignore-errors (sb-posix:unlink link-pathname))))
+    "/")
+
+  ;; Same thing, but with a very long link target (which doesn't have
+  ;; to exist).  This tests the array adjustment in the wrapper,
+  ;; provided that the target's length is long enough.
+  (deftest readlink.2
+      (let ((target-pathname (make-pathname
+                              :name (make-string 255 :initial-element #\a)
+                              :directory '(:absolute)))
+            (link-pathname (make-pathname :name "readlink.2"
+                                          :defaults *test-directory*)))
+        (sb-posix:symlink target-pathname link-pathname)
+        (unwind-protect
+             (sb-posix:readlink link-pathname)
+          (ignore-errors (sb-posix:unlink link-pathname))))
+    #.(concatenate 'string "/" (make-string 255 :initial-element #\a)))
+
+  ;; The error tests are in the order of exposition from SUSv3.
+  (deftest readlink.error.1
+      (let* ((subdir-pathname (merge-pathnames
+                               (make-pathname
+                                :directory '(:relative "readlink.error.1"))
+                               *test-directory*))
+             (link-pathname (make-pathname :name "readlink.error.1"
+                                           :defaults subdir-pathname)))
+        (sb-posix:mkdir subdir-pathname #o777)
+        (sb-posix:symlink "/" link-pathname)
+        (sb-posix:chmod subdir-pathname 0)
+        (unwind-protect
+             (handler-case (sb-posix:readlink link-pathname)
+               (sb-posix:syscall-error (c)
+                 (sb-posix:syscall-errno c)))
+          (ignore-errors
+            (sb-posix:chmod subdir-pathname #o777)
+            (sb-posix:unlink link-pathname)
+            (sb-posix:rmdir subdir-pathname))))
+    #.sb-posix:eacces)
+  (deftest readlink.error.2
+      (let* ((non-link-pathname (make-pathname :name "readlink.error.2"
+                                               :defaults *test-directory*))
+             (fd (sb-posix:open non-link-pathname sb-posix::o-creat)))
+        (unwind-protect
+             (handler-case (sb-posix:readlink non-link-pathname)
+               (sb-posix:syscall-error (c)
+                 (sb-posix:syscall-errno c)))
+          (ignore-errors
+            (sb-posix:close fd)
+            (sb-posix:unlink non-link-pathname))))
+    #.sb-posix:einval)
+  ;; Skipping EIO, ELOOP
+  (deftest readlink.error.3
+      (let* ((link-pathname (make-pathname :name "readlink.error.3"
+                                           :defaults *test-directory*))
+             (bogus-pathname (merge-pathnames
+                              (make-pathname
+                               :name "bogus"
+                               :directory '(:relative "readlink.error.3"))
+                               *test-directory*)))
+        (sb-posix:symlink link-pathname link-pathname)
+        (unwind-protect
+             (handler-case (sb-posix:readlink bogus-pathname)
+               (sb-posix:syscall-error (c)
+                 (sb-posix:syscall-errno c)))
+          (ignore-errors (sb-posix:unlink link-pathname))))
+    #.sb-posix:eloop)
+  ;; Note: PATH_MAX and NAME_MAX need not be defined, and may vary, so
+  ;; failure of this test is not too meaningful.
+  (deftest readlink.error.4
+      (let ((pathname
+             (make-pathname :name (make-string 257 ;NAME_MAX plus some, maybe
+                                               :initial-element #\a))))
+        (handler-case (sb-posix:readlink pathname)
+          (sb-posix:syscall-error (c)
+            (sb-posix:syscall-errno c))))
+    #.sb-posix:enametoolong)
+  (deftest readlink.error.5
+      (let ((string (format nil "~v{/A~}" 2049 ;PATH_MAX/2 plus some, maybe
+                                          '(x))))
+        (handler-case (sb-posix:readlink string)
+          (sb-posix:syscall-error (c)
+            (sb-posix:syscall-errno c))))
+    #.sb-posix:enametoolong)
+    (deftest readlink.error.6
+      (let ((no-such-pathname (make-pathname :name "readlink.error.6"
+                                             :defaults *test-directory*)))
+        (handler-case (sb-posix:readlink no-such-pathname)
+          (sb-posix:syscall-error (c)
+            (sb-posix:syscall-errno c))))
+    #.sb-posix:enoent)
+  (deftest readlink.error.7
+      (let* ((non-link-pathname (make-pathname :name "readlink.error.7"
+                                               :defaults *test-directory*))
+             (impossible-pathname (merge-pathnames
+                                   (make-pathname
+                                    :directory
+                                    '(:relative "readlink.error.7")
+                                    :name "readlink.error.7")
+                                   *test-directory*))
+             (fd (sb-posix:open non-link-pathname sb-posix::o-creat)))
+        (unwind-protect
+             (handler-case (sb-posix:readlink impossible-pathname)
+               (sb-posix:syscall-error (c)
+                 (sb-posix:syscall-errno c)))
+          (ignore-errors
+            (sb-posix:close fd)
+            (sb-posix:unlink non-link-pathname))))
+    #.sb-posix:enotdir)
+  )