From 5cd25aad3cdb6c970a76542e328a3beba8c1f2c9 Mon Sep 17 00:00:00 2001 From: Ludovic Courtès Date: Mon, 25 Apr 2016 23:22:45 +0200 Subject: syscalls: 'terminal-columns' catches EINVAL on the TIOCGWINSZ ioctl. Reported by Mark H Weaver . * guix/build/syscalls.scm (terminal-columns): Tolerate EINVAL. * tests/syscalls.scm ("terminal-window-size ENOTTY"): Likewise. --- guix/build/syscalls.scm | 5 ++++- tests/syscalls.scm | 7 ++++--- 2 files changed, 8 insertions(+), 4 deletions(-) diff --git a/guix/build/syscalls.scm b/guix/build/syscalls.scm index d168293ee4..6cdf65304d 100644 --- a/guix/build/syscalls.scm +++ b/guix/build/syscalls.scm @@ -1034,7 +1034,10 @@ always a positive integer." (fall-back))) (lambda args (let ((errno (system-error-errno args))) - (if (= errno ENOTTY) + ;; ENOTTY is what we're after but 2012-and-earlier Linux versions + ;; would return EINVAL instead in some cases: + ;; . + (if (or (= errno ENOTTY) (= errno EINVAL)) (fall-back) (apply throw args)))))) diff --git a/tests/syscalls.scm b/tests/syscalls.scm index 895f90f4d8..71bcbc4d32 100644 --- a/tests/syscalls.scm +++ b/tests/syscalls.scm @@ -259,15 +259,16 @@ (#f #f) (lo (interface-address lo))))))) -(test-equal "terminal-window-size ENOTTY" - ENOTTY +(test-assert "terminal-window-size ENOTTY" (call-with-input-file "/dev/null" (lambda (port) (catch 'system-error (lambda () (terminal-window-size port)) (lambda args - (system-error-errno args)))))) + ;; Accept EINVAL, which some old Linux versions might return. + (memv (system-error-errno args) + (list ENOTTY EINVAL))))))) (test-assert "terminal-columns" (> (terminal-columns) 0)) -- cgit v1.2.3