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Work on input tar parsing

This commit is contained in:
Lassi Kortela 2021-09-20 12:58:53 +03:00
parent dffbe974b3
commit b29504c23e
1 changed files with 18 additions and 9 deletions
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27
eval-server.sld
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@ -34,24 +34,33 @@
(let ((cmdline #f)
(environ #f)
(cwd (string->utf8 "/"))
(fd0 #f))
(stdin #f))
(parameterize ((current-input-port (request-port (current-request))))
(tar-for-each
(lambda (entry)
(let ((name (tar-entry-name entry)))
(let* ((name (tar-entry-name entry))
(bytes (read-tar-entry-bytes entry)))
(write name)(newline)
(cond ((equal? "proc/self/cmdline" name)
(set! cmdline (read-tar-entry-bytes)))
(cond ((or (equal? "proc/" name)
(equal? "proc/self/" name)
(equal? "proc/self/fd/" name))
#f)
((equal? "proc/self/cmdline" name)
(set! cmdline bytes))
((equal? "proc/self/environ" name)
(set! stdin (read-tar-entry-bytes)))
(set! stdin bytes))
((equal? "proc/self/cwd" name)
(set! stdin (read-tar-entry-bytes)))
(set! stdin bytes))
((equal? "proc/self/fd/0" name)
(set! stdin (read-tar-entry-bytes)))
(set! stdin bytes))
((string-prefix? "proc/self/fd/" name)
(error "Bad file descriptor on input"))
((or (equal? "proc" name) (string-prefix? "proc/" name))
(error "Bad proc/self/fd/ on input" name))
((string-prefix? "proc/" name)
(error "Bad /proc entry on input")))))))
(write `(cmdline ,cmdline))(newline)
(write `(environ ,environ))(newline)
(write `(cwd ,cwd))(newline)
(write `(stdin ,stdin))(newline)
(send-response
status: 'ok
headers: `((content-type ,tar-content-type))