Added a private flag

class.rkt

@@ -15,7 +15,7 @@
 
 (define ini%
   (class object%
-    (init-field [file #f] [fail #f])
+    (init-field [file #f] [fail #f] [private? #f])
     
     (define content #f)
 
@@ -33,6 +33,13 @@
     (define/public (get-fail)
       fail)
 
+    (define/public (get-private?)
+      private?)
+
+    (define/public (set-private! p)
+      (i-set! private? p)
+      this)
+
     (define/public (get-contents)
       content)
 
@@ -53,7 +60,7 @@
         (if (eq? file #f)
             (when fail
                 (error "ini: No filename set, cannot write ini after set!"))
-            (ini->file content file))
+            (ini->file content file #:private? private?))
         this))
 
     (define/public (get section key . default-value)

info.rkt

@@ -1,7 +1,7 @@
 #lang info
 
 (define pkg-authors '(hnmdijkema))
-(define version "0.3.2")
+(define version "0.3.3")
 (define license 'Apache-2.0)
 (define pkg-desc "A Simple .ini file reader/writer for racket")
 
@@ -12,7 +12,7 @@
   )
 
 (define deps
-  '("base" "roos"))
+  '(("base" #:version "8.7.0.10") "roos"))
 
 (define build-deps
   '("racket-doc"

main.rkt

@@ -41,8 +41,15 @@
     )
   )
 
-(define (ini->file ini file)
+(define (ini->file ini file #:private? [private? #f])
-  (let ((out (open-output-file (get-ini-file file) #:exists 'replace)))
+  (let* ((file (get-ini-file file))
+         (out (if (and private?
+                       (memq (system-type 'os) '(unix macosx)))
+                  (open-output-file file
+                                    #:exists 'replace
+                                    #:permissions #o600
+                                    #:replace-permissions? #t)
+                  (open-output-file file #:exists 'replace))))
     (let ((last-is-newline #f))
       (for-each (lambda (section)
                   (let ((section-name (car section)))
@@ -77,7 +84,6 @@
                                 lines))))
                 (mcdr ini)))
     (close-output-port out)))
-
 (define (make-ini)
   (mcons 'ini (list)))
 

scribblings/ini.scrbl

@@ -45,9 +45,10 @@
   ]
 }
 
-@defproc[(ini->file [ini mc-pair?] [file path-string?]) void?]{
+@defproc[(ini->file [ini mc-pair?] [file path-string?] [#:private? private? boolean? #f]) void?]{
    Writes an INI structure (as produced by @racket[file->ini] or @racket[make-ini]) to the specified file.
    If file is a symbol?, the file will be constructed from the prefs-dir, the symbol and a suffix ".ini".
+   If @racket[private?] is @racket[#t], Unix-like systems restrict the file to mode @tt{0600} before the INI contents are written.
   
   The output preserves:
   @itemlist[
@@ -89,6 +90,7 @@ An OO wrapper around the ini functions.
 
 @defconstructor[([file (or/c symbol? string? path? boolean?) #f]
                  [fail (or/c boolean?) #f]
+                 [private? (or/c boolean?) #f]
                  )]{
   Creates the ini from the given file.
   * If (eq? file #f), an empty ini will be made.
@@ -115,6 +117,15 @@ An OO wrapper around the ini functions.
   Sets the value of the 'fail' flag. See constructor for more information.
 }
 
+
+@defmethod*[([(get-private?) boolean?])]{
+  Returns whether private file permissions are enabled.
+}
+
+@defmethod*[([(set-private! [private? boolean?]) this])]{
+  Enables or disables private file permissions for subsequent writes.
+}
+
 @defmethod*[([(get-contents) list?])]{
   Gets the contents of the ini structure as stored in memory.
 }

tests/private.rkt

@@ -0,0 +1,19 @@
+#lang racket/base
+
+(require rackunit
+         racket/file
+         "../main.rkt")
+
+(define tmp (make-temporary-file "simple-ini-private-~a.ini"))
+(dynamic-wind
+ void
+ (lambda ()
+   (define ini (make-ini))
+   (ini-set! ini 'secret 'token "abc")
+   (ini->file ini tmp #:private? #t)
+   (when (memq (system-type 'os) '(unix macosx))
+     (check-equal? (bitwise-and (file-or-directory-permissions tmp 'bits) #o777)
+                   #o600)))
+ (lambda ()
+   (when (file-exists? tmp)
+     (delete-file tmp))))