diff options
Diffstat (limited to 'guix/build/syscalls.scm')
| -rw-r--r-- | guix/build/syscalls.scm | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/guix/build/syscalls.scm b/guix/build/syscalls.scm index ed833c10b2..5ce0abbb48 100644 --- a/guix/build/syscalls.scm +++ b/guix/build/syscalls.scm @@ -915,10 +915,12 @@ always a positive integer." (catch 'system-error (lambda () - (match (window-size-columns (terminal-window-size port)) - ;; Things like Emacs shell-mode return 0, which is unreasonable. - (0 (fall-back)) - ((? number? columns) columns))) + (if (file-port? port) + (match (window-size-columns (terminal-window-size port)) + ;; Things like Emacs shell-mode return 0, which is unreasonable. + (0 (fall-back)) + ((? number? columns) columns)) + (fall-back))) (lambda args (let ((errno (system-error-errno args))) (if (= errno ENOTTY) |