=== modified file 'pkgcore/spawn.py'
--- pkgcore/spawn.py	
+++ pkgcore/spawn.py	
@@ -8,13 +8,20 @@
 
 from pkgcore.util.mappings import ProtectedDict
 from pkgcore.const import BASH_BINARY, SANDBOX_BINARY, FAKED_PATH, LIBFAKEROOT_PATH
-
 
 try:
 	import resource
 	max_fd_limit = resource.getrlimit(resource.RLIMIT_NOFILE)[0]
 except ImportError:
 	max_fd_limit = 256
+
+if os.path.isdir("/proc/%i/fd" % os.getpid()):
+	def get_open_fds():
+		return map(int, os.listdir("/proc/%i/fd" % os.getpid()))
+else:
+	def get_open_fds():
+		return xrange(max_fd_limit)
+
 
 sandbox_capable = (os.path.isfile(SANDBOX_BINARY) and
                    os.access(SANDBOX_BINARY, os.X_OK))
@@ -163,6 +170,7 @@
 		fd_pipes[1] = pw
 		fd_pipes[2] = pw
 
+
 	pid = os.fork()
 
 	if not pid:
@@ -246,7 +254,7 @@
 		os.dup2(my_fds[fd], fd)
 	# Then close _all_ fds that haven't been explictly
 	# requested to be kept open.
-	for fd in range(max_fd_limit):
+	for fd in get_open_fds():
 		if fd not in my_fds:
 			try:
 				os.close(fd)