147 lines
4.8 KiB
Scheme
147 lines
4.8 KiB
Scheme
;;; Ikarus Scheme -- A compiler for R6RS Scheme.
|
|
;;; Copyright (C) 2006,2007,2008 Abdulaziz Ghuloum
|
|
;;;
|
|
;;; This program is free software: you can redistribute it and/or modify
|
|
;;; it under the terms of the GNU General Public License version 3 as
|
|
;;; published by the Free Software Foundation.
|
|
;;;
|
|
;;; This program is distributed in the hope that it will be useful, but
|
|
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
;;; General Public License for more details.
|
|
;;;
|
|
;;; You should have received a copy of the GNU General Public License
|
|
;;; along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
|
|
(library (ikarus posix)
|
|
(export posix-fork fork waitpid system file-exists? delete-file
|
|
getenv env environ)
|
|
(import
|
|
(rnrs bytevectors)
|
|
(except (ikarus)
|
|
posix-fork fork waitpid system file-exists? delete-file
|
|
getenv env environ))
|
|
|
|
(define posix-fork
|
|
(lambda ()
|
|
(foreign-call "ikrt_fork")))
|
|
|
|
(define fork
|
|
(lambda (parent-proc child-proc)
|
|
(let ([pid (posix-fork)])
|
|
(cond
|
|
[(fx= pid 0) (child-proc)]
|
|
[(fx= pid -1)
|
|
(die 'fork "failed")]
|
|
[else (parent-proc pid)]))))
|
|
|
|
(define waitpid
|
|
(lambda (pid)
|
|
(unless (fixnum? pid)
|
|
(die 'waitpid "not a fixnum" pid))
|
|
(foreign-call "ikrt_waitpid" pid)))
|
|
|
|
(define system
|
|
(lambda (x)
|
|
(unless (string? x)
|
|
(die 'system "not a string" x))
|
|
(let ([rv (foreign-call "ik_system"
|
|
(string->utf8 x))])
|
|
(if (fx= rv -1)
|
|
(die 'system "failed")
|
|
rv))))
|
|
|
|
(define file-exists?
|
|
(lambda (x)
|
|
(unless (string? x)
|
|
(die 'file-exists? "filename is not a string" x))
|
|
(let ([v (foreign-call "ikrt_file_exists"
|
|
(string->utf8 x))])
|
|
(cond
|
|
[(boolean? v) v]
|
|
[else
|
|
(die 'file-exists?
|
|
(case v
|
|
[(1) "the path contains a non-directory"]
|
|
[(2) "the path is too long"]
|
|
[(3) "the path is not accessible"]
|
|
[(4) "the path contains too many symbolic links"]
|
|
[(5) "internal access die while accessing"]
|
|
[(6) "IO die encountered while accessing"]
|
|
[else "Unknown die"])
|
|
x)]))))
|
|
|
|
(define delete-file
|
|
(lambda (x)
|
|
(unless (string? x)
|
|
(die 'delete-file "filename is not a string" x))
|
|
(let ([v (foreign-call "ikrt_delete_file"
|
|
(string->utf8 x))])
|
|
(case v
|
|
[(0) (void)]
|
|
[else
|
|
(die 'delete-file
|
|
(case v
|
|
[(1) "the path contains a non-directory"]
|
|
[(2) "the path is too long"]
|
|
[(3) "the file does not exist"]
|
|
[(4) "the path is not accessible"]
|
|
[(5) "the path contains too many symbolic links"]
|
|
[(6) "you do not have permissions to delete file"]
|
|
[(7) "device is busy"]
|
|
[(8) "IO die encountered while deleting"]
|
|
[(9) "is in a read-only file system"]
|
|
[(10) "internal access die while deleting"]
|
|
[else "Unknown die while deleting"])
|
|
x)]))))
|
|
|
|
(define ($getenv-bv key)
|
|
(foreign-call "ikrt_getenv" key))
|
|
(define ($getenv-str key)
|
|
(utf8->string ($getenv-bv (string->utf8 key))))
|
|
|
|
(define (getenv key)
|
|
(if (string? key)
|
|
($getenv-str key)
|
|
(die 'getenv "the key is not a string" key)))
|
|
|
|
(define env
|
|
(let ()
|
|
(define env
|
|
(case-lambda
|
|
[(key)
|
|
(if (string? key)
|
|
(foreign-call "ikrt_getenv" key)
|
|
(die 'env "the key is not a string" key))]
|
|
[(key val) (env key val #t)]
|
|
[(key val overwrite?)
|
|
(if (string? key)
|
|
(if (string? val)
|
|
(unless (foreign-call "ikrt_setenv" key val overwrite?)
|
|
(die 'env "failed" key val))
|
|
(die 'env "the value is not a string" val))
|
|
(die 'env "the key is not a string" key))]))
|
|
(define busted (lambda args (die 'env "BUG: busted!")))
|
|
busted))
|
|
|
|
|
|
(define environ (lambda args (die 'environ "busted!")))
|
|
(define environ^
|
|
(lambda ()
|
|
(map
|
|
(lambda (s)
|
|
(define (loc= s i n)
|
|
(cond
|
|
[(fx= i n) i]
|
|
[(char=? (string-ref s i) #\=) i]
|
|
[else (loc= s (fx+ i 1) n)]))
|
|
(let ([n (string-length s)])
|
|
(let ([i (loc= s 0 n)])
|
|
(cons (substring s 0 i)
|
|
(if (fx< (fxadd1 i) n)
|
|
(substring s (fxadd1 i) n)
|
|
"")))))
|
|
(foreign-call "ikrt_environ"))))
|
|
)
|