(process-lines): Move here from ../admin/admin.el.

diff --git a/lisp/subr.el b/lisp/subr.el
index c110390b44a5d39d14c4b26778a5aa076dd4fb31..5a88fa4fd5d5ccf68c347f0d44aa8577d318c0be 100644 (file)
--- a/lisp/subr.el
+++ b/lisp/subr.el
@@ -1539,6 +1539,23 @@ FILE should be the name of a library, with no directory name."
 \f
 ;;;; Process stuff.
 
+(defun process-lines (program &rest args)
+  "Execute PROGRAM with ARGS, returning its output as a list of lines.
+Signal an error if the program returns with a non-zero exit status."
+  (with-temp-buffer
+    (let ((status (apply 'call-process program nil (current-buffer) nil args)))
+      (unless (eq status 0)
+       (error "%s exited with status %s" program status))
+      (goto-char (point-min))
+      (let (lines)
+       (while (not (eobp))
+         (setq lines (cons (buffer-substring-no-properties
+                            (line-beginning-position)
+                            (line-end-position))
+                           lines))
+         (forward-line 1))
+       (nreverse lines)))))
+
 ;; open-network-stream is a wrapper around make-network-process.
 
 (when (featurep 'make-network-process)