diff options
Diffstat (limited to 'guix/zlib.scm')
| -rw-r--r-- | guix/zlib.scm | 29 |
1 files changed, 10 insertions, 19 deletions
diff --git a/guix/zlib.scm b/guix/zlib.scm index 74420129f6..3d830ef84e 100644 --- a/guix/zlib.scm +++ b/guix/zlib.scm @@ -149,21 +149,6 @@ the number of uncompressed bytes written, a strictly positive integer." ;; Z_DEFAULT_COMPRESSION. -1) -(define (close-procedure gzfile port) - "Return a procedure that closes GZFILE, ensuring its underlying PORT is -closed even if closing GZFILE triggers an exception." - (lambda () - (catch 'zlib-error - (lambda () - ;; 'gzclose' closes the underlying file descriptor. 'close-port' - ;; calls close(2), gets EBADF, which is ignores. - (gzclose gzfile) - (close-port port)) - (lambda args - ;; Make sure PORT is closed despite the zlib error. - (close-port port) - (apply throw args))))) - (define* (make-gzip-input-port port #:key (buffer-size %default-buffer-size)) "Return an input port that decompresses data read from PORT, a file port. PORT is automatically closed when the resulting port is closed. BUFFER-SIZE @@ -173,7 +158,11 @@ buffered input, which would be lost (and is lost anyway)." (define gzfile (match (drain-input port) ("" ;PORT's buffer is empty - (gzdopen (fileno port) "r")) + ;; Since 'gzclose' will eventually close the file descriptor beneath + ;; PORT, we increase PORT's revealed count and never call 'close-port' + ;; on PORT since we would get EBADF if 'gzclose' already closed it (on + ;; 2.0 EBADF is swallowed by 'fport_close' but on 2.2 it is raised). + (gzdopen (port->fdes port) "r")) (_ ;; This is unrecoverable but it's better than having the buffered input ;; be lost, leading to unclear end-of-file or corrupt-data errors down @@ -188,7 +177,8 @@ buffered input, which would be lost (and is lost anyway)." (gzbuffer! gzfile buffer-size)) (make-custom-binary-input-port "gzip-input" read! #f #f - (close-procedure gzfile port))) + (lambda () + (gzclose gzfile)))) (define* (make-gzip-output-port port #:key @@ -200,7 +190,7 @@ port is closed." (define gzfile (begin (force-output port) ;empty PORT's buffer - (gzdopen (fileno port) + (gzdopen (port->fdes port) (string-append "w" (number->string level))))) (define (write! bv start count) @@ -210,7 +200,8 @@ port is closed." (gzbuffer! gzfile buffer-size)) (make-custom-binary-output-port "gzip-output" write! #f #f - (close-procedure gzfile port))) + (lambda () + (gzclose gzfile)))) (define* (call-with-gzip-input-port port proc #:key (buffer-size %default-buffer-size)) |