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

1 files changed, 17 insertions, 0 deletions

diff --git a/lisp/subr.el b/lisp/subr.el
index c110390b44a..5a88fa4fd5d 100644
--- a/lisp/subr.el
+++ b/lisp/subr.el
@@ -1539,6 +1539,23 @@ FILE should be the name of a library, with no directory name."
 
 ;;;; 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)