[gentoo-portage-dev] [PATCH v2] Add another check for broken /dev/s (bug 538980)

[Alexander Berntsen]

Signed-off-by: Alexander Berntsen <bernalex@g.o>
Suggested-by:  Zac Medico         <zmedico@g.o>
---
Forgot Suggested-by.

 pym/_emerge/main.py | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/pym/_emerge/main.py b/pym/_emerge/main.py
index f1a9e18..84094ae 100644
--- a/pym/_emerge/main.py
+++ b/pym/_emerge/main.py
@@ -1114,6 +1114,15 @@ def emerge_main(args=None):
 				 level=logging.ERROR, noiselevel=-1)
 		return 1
 
+	# Verify that BASH process substitution works as another cheap early
+	# filter. Process substitution uses '/dev/fd'.
+	if portage.process.spawn_bash("[[ $(< <(echo foo) ) == foo ]]") != 0:
+		writemsg_level("Failed to validate a sane '/dev'.\n"
+				 "bash process substitution doesn't work; this may be an "
+				 "indication of a broken '/dev/fd'.\n",
+				 level=logging.ERROR, noiselevel=-1)
+		return 1
+
 	# Portage needs to ensure a sane umask for the files it creates.
 	os.umask(0o22)
 	emerge_config = load_emerge_config(
-- 
2.0.5