diff options
| author | Brad Fitzpatrick <bradfitz@tailscale.com> | 2020-03-18 13:23:00 -0700 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2020-05-02 01:50:47 -0600 |
| commit | 2fb0a712f0ca2f9a922cdc4f1f47b88c3ee70048 (patch) | |
| tree | d78290c8787e3e12936a342ea384a0b6acf98c76 | |
| parent | f2c6faad44fa70cdc8ef80385ca9826bbf0468d9 (diff) | |
tun: return a better error message if /dev/net/tun doesn't exist
It was just returning "no such file or directory" (the String of the
syscall.Errno returned by CreateTUN).
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
| -rw-r--r-- | tun/tun_linux.go | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/tun/tun_linux.go b/tun/tun_linux.go index 1e44b59..179635a 100644 --- a/tun/tun_linux.go +++ b/tun/tun_linux.go @@ -392,6 +392,9 @@ func (tun *NativeTun) Close() error { func CreateTUN(name string, mtu int) (Device, error) { nfd, err := unix.Open(cloneDevicePath, os.O_RDWR, 0) if err != nil { + if os.IsNotExist(err) { + return nil, fmt.Errorf("CreateTUN(%q) failed; %s does not exist", name, cloneDevicePath) + } return nil, err } |