* lisp/lpr.el (print-region-1): Echo lpr-program's output, so error messages

and warnings are not silently discarded (e.g. use "-d" instead of "-P").

2 files changed, 31 insertions, 15 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 01c646412d4..ce62ee3cccf 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,8 @@
+2011-05-06  Stefan Monnier  <monnier@iro.umontreal.ca>
+
+        * lpr.el (print-region-1): Echo lpr-program's output, so error messages
+        and warnings are not silently discarded (e.g. use "-d" instead of "-P").
+
 2011-05-06  Glenn Morris  <rgm@gnu.org>
 
         * calendar/appt.el (appt-message-warning-time): Doc fix.
diff --git a/lisp/lpr.el b/lisp/lpr.el
index 709f992b2b8..76c69f3308c 100644
--- a/lisp/lpr.el
+++ b/lisp/lpr.el
@@ -29,6 +29,8 @@
 
 ;;; Code:
 
+(eval-when-compile (require 'cl))
+
 ;;;###autoload
 (defvar lpr-windows-system
   (memq system-type '(ms-dos windows-nt)))
@@ -258,21 +260,30 @@ for further customization of the printer command."
                              lpr-page-header-switches)))
             (setq start (point-min)
                   end   (point-max))))
-      (apply (or print-region-function 'call-process-region)
-             (nconc (list start end lpr-command
-                          nil nil nil)
-                    (and lpr-add-switches
-                         (list "-J" name))
-                    ;; These belong in pr if we are using that.
-                    (and lpr-add-switches lpr-headers-switches
-                         (list "-T" title))
-                    (and (stringp printer-name)
-                         (list (concat lpr-printer-switch
-                                       printer-name)))
-                    nswitches))
-      (if (markerp end)
-          (set-marker end nil))
-      (message "Spooling%s...done" switch-string))))
+      (let ((buf (current-buffer)))
+        (with-temp-buffer
+          (let ((tempbuf (current-buffer)))
+            (with-current-buffer buf
+              (apply (or print-region-function 'call-process-region)
+                     (nconc (list start end lpr-command
+                                  nil tempbuf nil)
+                            (and lpr-add-switches
+                                 (list "-J" name))
+                            ;; These belong in pr if we are using that.
+                            (and lpr-add-switches lpr-headers-switches
+                                 (list "-T" title))
+                            (and (stringp printer-name)
+                                 (list (concat lpr-printer-switch
+                                               printer-name)))
+                            nswitches))))
+          (if (markerp end)
+              (set-marker end nil))
+          (message "Spooling%s...done%s%s" switch-string
+                   (case (count-lines (point-min) (point-max))
+                     (0 "")
+                     (1 ": ")
+                     (t ":\n"))
+                   (buffer-string)))))))
 
 ;; This function copies the text between start and end
 ;; into a new buffer, makes that buffer current.