From 9f53d717c4fea7bb2a493d911da0abbe9c78aef5 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Tue, 1 Feb 2011 11:42:29 +0100 Subject: [PATCH] lxc-attach gives a better error message Don't assume the user knows the kernel internals :) Signed-off-by: Daniel Lezcano --- src/lxc/namespace.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/src/lxc/namespace.c b/src/lxc/namespace.c index 3905a0333..3a6db795b 100644 --- a/src/lxc/namespace.c +++ b/src/lxc/namespace.c @@ -102,6 +102,12 @@ int lxc_attach(pid_t pid) int fd[size]; int i; + sprintf(path, "/proc/%d/ns", pid); + if (access(path, R_OK)) { + ERROR("Does this kernel version support 'attach' ?"); + return -1; + } + for (i = 0; i < size; i++) { sprintf(path, "/proc/%d/ns/%s", pid, ns[i]); fd[i] = open(path, O_RDONLY); -- 2.47.2