From 681d78b6cf4d9bf0ad6f4f36742f29348f865409 Mon Sep 17 00:00:00 2001
From: Anthony Sottile <asottile@umich.edu>
Date: Mon, 1 Apr 2019 09:23:42 -0700
Subject: [PATCH] Bound maxsize by 4096 when SC_ARG_MAX is not present

---
 pre_commit/xargs.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pre_commit/xargs.py b/pre_commit/xargs.py
index f32cb32c..936a5bef 100644
--- a/pre_commit/xargs.py
+++ b/pre_commit/xargs.py
@@ -25,7 +25,7 @@ def _environ_size(_env=None):
 def _get_platform_max_length():  # pragma: no cover (platform specific)
     if os.name == 'posix':
         maximum = os.sysconf(str('SC_ARG_MAX')) - 2048 - _environ_size()
-        maximum = min(maximum, 2 ** 17)
+        maximum = max(min(maximum, 2 ** 17), 2 ** 12)
         return maximum
     elif os.name == 'nt':
         return 2 ** 15 - 2048  # UNICODE_STRING max - headroom