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+;;; "nclients.scm" Interface to net-client programs.
+; Copyright 1997, 1998 Aubrey Jaffer
+;
+;Permission to copy this software, to redistribute it, and to use it
+;for any purpose is granted, subject to the following restrictions and
+;understandings.
+;
+;1. Any copy made of this software must include this copyright notice
+;in full.
+;
+;2. I have made no warrantee or representation that the operation of
+;this software will be error-free, and I am under no obligation to
+;provide any services, by way of maintenance, update, or otherwise.
+;
+;3. In conjunction with products arising from the use of this
+;material, there shall be no use of my name in any advertising,
+;promotional, or sales literature without prior written consent in
+;each case.
+
+(require 'string-search)
+(require 'line-i/o)
+(require 'system)
+(require 'printf)
+(require 'scanf)
+
+;;@args proc
+;;@args proc k
+;;Calls @1 with @var{k} arguments, strings returned by successive
+;;calls to @code{tmpnam}. If @1 returns, then any files named by the
+;;arguments to @1 are deleted automatically and the value(s) yielded
+;;by the @1 is(are) returned. @var{k} may be ommited, in which case
+;;it defaults to @code{1}.
+(define (call-with-tmpnam proc . k)
+ (do ((cnt (if (null? k) 0 (+ -1 (car k))) (+ -1 cnt))
+ (paths '() (cons (tmpnam) paths)))
+ ((negative? cnt)
+ (let ((ans (apply proc paths)))
+ (for-each (lambda (path) (if (file-exists? path) (delete-file path)))
+ paths)
+ ans))))
+
+;;@args
+;;@0 returns a string of the form @samp{username@r{@@}hostname}. If
+;;this e-mail address cannot be obtained, #f is returned.
+(define user-email-address
+ (let ((user (or (getenv "USER") (getenv "USERNAME")))
+ (hostname (getenv "HOSTNAME"))) ;with domain
+ (lambda ()
+ (if (not (and user hostname))
+ (call-with-tmpnam
+ (lambda (tmp)
+ (define command->string
+ (lambda (command)
+ (and (zero? (system (string-append command " >" tmp)))
+ (file-exists? tmp)
+ (let ((res #f))
+ (call-with-input-file tmp
+ (lambda (port)
+ (and (eqv? 1 (fscanf port "%s" res)) res)))))))
+ (case (software-type)
+ ;;((AMIGA) )
+ ;;((MACOS THINKC) )
+ ((MS-DOS WINDOWS OS/2 ATARIST)
+ (let ((compname (getenv "COMPUTERNAME")) ;without domain
+ (workgroup #f)
+ (netdir (or (getenv "windir")
+ (getenv "winbootdir")
+ (and (getenv "SYSTEMROOT")
+ (string-append (getenv "SYSTEMROOT")
+ "\\system32"))
+ "C:\\windows")))
+ (define (net . cmd)
+ (zero? (system (apply string-append
+ (or netdir "")
+ (if netdir "\\" "")
+ "NET " cmd))))
+ (and (not (and user hostname))
+ (zero? (system (string-append
+ (or netdir "")
+ (if netdir "\\" "")
+ "IPCONFIG /ALL > " tmp " ")))
+ (file-exists? tmp)
+ ;;(print tmp '=) (display-file tmp)
+ (call-with-input-file tmp
+ (lambda (port)
+ (find-string-from-port? "Host Name" port)
+ (fscanf port " %*[. ]: %s" hostname)
+ (delete-file tmp))))
+ (and (not (and user hostname))
+ (net "START /LIST >" tmp)
+ (file-exists? tmp)
+ (not (eof-object? (call-with-input-file tmp read-char)))
+ (cond
+ ((call-with-input-file tmp
+ (lambda (port)
+ (find-string-from-port? "o network servic" port)))
+ (and (net "CONFIG /YES >" tmp)
+ (net "STOP /YES")))
+ (else (net "CONFIG /YES >" tmp)))
+ (call-with-input-file tmp
+ (lambda (port)
+ (do ((line (read-line port) (read-line port)))
+ ((eof-object? line))
+ (sscanf line " Workstation root directory %s"
+ netdir)
+ (sscanf line " Computer name \\\\%s" compname)
+ (sscanf line " Workstation Domain %s" workgroup)
+ (sscanf line " Workgroup %s" workgroup)
+ (sscanf line " User name %s" user)))))
+ (and netdir (not (and user hostname))
+ (set! netdir (string-append netdir "\\system.ini"))
+ (file-exists? netdir)
+ (call-with-input-file netdir
+ (lambda (port)
+ (and (find-string-from-port? "[DNS]" port)
+ (read-line port) ;past newline
+ (do ((line (read-line port) (read-line port)))
+ ((not (and (string? line)
+ (string-index line #\=))))
+ (sscanf line "HostName=%s" compname)
+ (sscanf line "DomainName=%s" workgroup)))))
+ (not user)
+ (call-with-input-file netdir
+ (lambda (port)
+ (and (find-string-from-port? "[Network]" port)
+ (read-line port) ;past newline
+ (do ((line (read-line port) (read-line port)))
+ ((not (and (string? line)
+ (string-index line #\=))))
+ (sscanf line "UserName=%s" user))))))
+ (if (and compname (not hostname))
+ (set! hostname
+ (string-append
+ compname "." (or workgroup "localnet"))))))
+ ;;((NOSVE) )
+ ;;((VMS) )
+ ((UNIX COHERENT)
+ (if (not user)
+ (set! user (command->string "whoami")))
+ (if (not hostname)
+ (set! hostname (command->string "hostname")))))
+ (if (not user) (set! user "John_Doe"))
+ (if (not hostname) (set! hostname "localhost")))))
+ (string-append user "@" hostname))))
+
+;;@args
+;;@0 returns a string containing the absolute file name representing
+;;the current working directory. If this string cannot be obtained,
+;;#f is returned.
+;;
+;;If @0 cannot be supported by the platform, the value of @0 is
+;;#f.
+(define current-directory
+ (case (software-type)
+ ;;((AMIGA) )
+ ;;((MACOS THINKC) )
+ ((MS-DOS WINDOWS ATARIST OS/2)
+ (lambda ()
+ (call-with-tmpnam
+ (lambda (tmp)
+ (and (zero? (system (string-append "cd >" tmp)))
+ (file-exists? tmp)
+ (call-with-input-file tmp
+ (lambda (port)
+ (let ((lst (scanf-read-list "%[^:]%[:] %s" port)))
+ (and (pair? lst)
+ (eqv? 3 (length lst))
+ (apply string-append lst))))))))))
+ ;;((NOSVE) )
+ ((UNIX COHERENT)
+ (lambda ()
+ (call-with-tmpnam
+ (lambda (tmp)
+ (and (zero? (system (string-append "pwd >" tmp)))
+ (file-exists? tmp)
+ (let ((path (call-with-input-file tmp read-line)))
+ (and (string? path) path)))))))
+ ;;((VMS) )
+ (else #f)))
+
+;;@body
+;;Creates a sub-directory @1 of the current-directory. If successful,
+;;@0 returns #t; otherwise #f.
+(define (make-directory name)
+ (zero? (system (string-append "mkdir " name))))
+
+;;@body
+;;Returns #t if changing directory to @1 makes the current working
+;;directory the same as it is before changing directory; otherwise
+;;returns #f.
+(define (null-directory? file-name)
+ (member file-name '("" "." "./" ".\\")))
+
+;;@body
+;;Returns #t if @1 is a fully specified pathname (does not depend on
+;;the current working directory); otherwise returns #f.
+(define (absolute-path? file-name)
+ (and (string? file-name)
+ (positive? (string-length file-name))
+ (memv (string-ref file-name 0) '(#\\ #\/))))
+
+
+;;@body Returns #t if the string @1 contains characters used for
+;;specifying glob patterns, namely @samp{*}, @samp{?}, or @samp{[}.
+(define (glob-pattern? str)
+ (let loop ((idx (+ -1 (string-length str))))
+ (if (negative? idx)
+ #f
+ (case (string-ref str idx)
+ ((#\* #\[ #\?) #t)
+ (else (loop (+ -1 idx)))))))
+
+;;@body
+;;Returns a list of the decoded FTP @1; or #f if indecipherable. FTP
+;;@dfn{Uniform Resource Locator}, @dfn{ange-ftp}, and @dfn{getit}
+;;formats are handled. The returned list has four elements which are
+;;strings or #f:
+;;
+;;@enumerate 0
+;;@item
+;;username
+;;@item
+;;password
+;;@item
+;;remote-site
+;;@item
+;;remote-directory
+;;@end enumerate
+(define (parse-ftp-address url)
+ (define length? (lambda (len lst) (and (eqv? len (length lst)) lst)))
+ (cond
+ ((not url) #f)
+ ((length? 1 (scanf-read-list " ftp://%s %s" url))
+ => (lambda (host)
+ (let ((login #f) (path #f) (dross #f))
+ (sscanf (car host) "%[^/]/%[^@]%s" login path dross)
+ (and login
+ (append (cond
+ ((length? 2 (scanf-read-list "%[^@]@%[^@]%s" login))
+ => (lambda (userpass@hostport)
+ (append
+ (cond ((length? 2 (scanf-read-list
+ "%[^:]:%[^@/]%s"
+ (car userpass@hostport))))
+ (else (list (car userpass@hostport) #f)))
+ (cdr userpass@hostport))))
+ (else (list "anonymous" #f login)))
+ (list path))))))
+ (else
+ (let ((user@site #f) (colon #f) (path #f) (dross #f))
+ (case (sscanf url " %[^:]%[:]%[^@] %s" user@site colon path dross)
+ ((2 3)
+ (let ((user #f) (site #f))
+ (cond ((or (eqv? 2 (sscanf user@site "/%[^@/]@%[^@]%s"
+ user site dross))
+ (eqv? 2 (sscanf user@site "%[^@/]@%[^@]%s"
+ user site dross)))
+ (list user #f site path))
+ ((eqv? 1 (sscanf user@site "@%[^@]%s" site dross))
+ (list #f #f site path))
+ (else (list #f #f user@site path)))))
+ (else
+ (let ((site (scanf-read-list " %[^@/] %s" url)))
+ (and (length? 1 site) (list #f #f (car site) #f)))))))))
+
+;;@body
+;;@3 must be a non-empty string or #f. @1 must be a non-empty list
+;;of pathnames or Glob patterns (@pxref{Filenames}) matching files to
+;;transfer.
+;;
+;;@0 puts the files specified by @1 into the @5 directory of FTP @4
+;;using name @2 with (optional) @3.
+;;
+;;If @3 is #f and @2 is not @samp{ftp} or @samp{anonymous}, then @2 is
+;;ignored; FTP takes the username and password from the @file{.netrc}
+;;or equivalent file.
+(define (ftp-upload paths user password remote-site remote-dir)
+ (call-with-tmpnam
+ (lambda (script logfile)
+ (define local-path (current-directory))
+ (define passwd (or password (user-email-address)))
+ (dynamic-wind
+ (lambda () #f)
+ (lambda ()
+ (call-with-current-continuation
+ (lambda (exit)
+ (define (run-ftp-script paths)
+ (call-with-output-file script
+ (lambda (port)
+ (define lcd "")
+ (cond ((or (member user '(ftp anonymous "ftp" "anonymous"))
+ password)
+ (fprintf port "user %s %s\n" user passwd)))
+ (fprintf port "binary\n") ; Turn binary ON for all transfers
+ ;;(fprintf port "prompt\n") ; Turn prompt OFF for possible mget
+ (if (not (null-directory? remote-dir))
+ (fprintf port "cd %s\n" remote-dir))
+ (for-each
+ (lambda (path-name)
+ (let* ((r/i (string-reverse-index path-name #\/))
+ (dir (if r/i (substring path-name 0 (+ 1 r/i)) ""))
+ (file-name (if r/i
+ (substring path-name (+ 1 r/i)
+ (string-length path-name))
+ path-name)))
+ (cond ((and r/i (glob-pattern? dir))
+ (slib:warn
+ "Wildcard not allowed in directory component "
+ path-name)
+ (exit #f))
+ ((and (not (glob-pattern? file-name))
+ (not (file-exists? path-name)))
+ (slib:warn " file doesn't exist:" path-name)
+ (exit #f))
+ ((equal? lcd dir))
+ ((absolute-path? dir)
+ (fprintf port "lcd %s\n" dir))
+ ((eqv? 0 (substring? lcd dir))
+ (fprintf port "lcd %s\n"
+ (substring dir (string-length lcd)
+ (string-length dir))))
+ (else
+ (fprintf port "lcd %s\n" local-path)
+ (if (not (null-directory? dir))
+ (fprintf port "lcd %s\n" dir))))
+ (set! lcd dir)
+ (cond ((glob-pattern? file-name)
+ (fprintf port "mput %s\n" file-name))
+ (else
+ (fprintf port "put %s\n" file-name)))))
+ paths)))
+ ;;(display-file script)
+ (cond
+ ((zero? (system
+ (string-append
+ "ftp "
+ (if (or (member user '(ftp anonymous "ftp" "anonymous"))
+ password)
+ "-inv" "-iv")
+ " " remote-site
+ " <" script
+ " >" logfile)))
+ (file-exists? logfile)
+ (call-with-input-file logfile
+ (lambda (port)
+ (do ((line (read-line port) (read-line port)))
+ ((or (eof-object? line)
+ (substring-ci? "Unknown host" line)
+ (substring-ci? "Not connected" line)
+ (and (memv (string-ref line 0) '(#\4 #\5))
+ (not (substring-ci? "bytes" line))))
+ (cond ((eof-object? line) #t)
+ (else (slib:warn line) #f)))
+ ;;(write-line line)
+ ))))
+ (else (slib:warn 'ftp 'failed) #f)))
+ (cond ((or local-path (every? absolute-file? paths))
+ (run-ftp-script paths))
+ (else (for-each (lambda (path) (run-ftp-script (list path)))
+ paths))))))
+ (lambda ()
+ (if (file-exists? script) (delete-file script))
+ (if (file-exists? logfile) (delete-file logfile)))))
+ 2))
+
+;;@body
+;;Returns a URL-string for @1 on the local host.
+(define (path->url path)
+ (if (absolute-path? path)
+ (sprintf #f "file:%s" path)
+ (sprintf #f "file:%s/%s" (current-directory) path)))
+
+;;@body
+;;If a @samp{netscape} browser is running, @0 causes the browser to
+;;display the page specified by string @1 and returns #t.
+;;
+;;If the browser is not running, @0 runs @samp{netscape} with the
+;;argument @1. If the browser starts as a background job, @0 returns
+;;#t immediately; if the browser starts as a foreground job, then @0
+;;returns #t when the browser exits; otherwise it returns #f.
+(define (browse-url-netscape url)
+ (or (eqv? 0 (system (sprintf #f "netscape-remote -remote 'openURL(%s)'" url)))
+ (eqv? 0 (system (sprintf #f "netscape -remote 'openURL(%s)'" url)))
+ (eqv? 0 (system (sprintf #f "netscape '%s'&" url)))
+ (eqv? 0 (system (sprintf #f "netscape '%s'" url)))))