I'm getting:
could not configure /dev/net/tun (tap%d): Operation not permitted
When the ioctl() fails, ifr.ifr_name will most likely not be overwritten.
So we better only use it when ifname contains a string.
Signed-off-by: Luiz Capitulino <lcapitul...@redhat.com>
---
PS: Trivial tree candidate.
net/tap-linux.c | 6 +++++-
1 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/net/tap-linux.c b/net/tap-linux.c
index ff8cad0..41d581b 100644
--- a/net/tap-linux.c
+++ b/net/tap-linux.c
@@ -73,7 +73,11 @@ int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
int vnet_hdr_required
pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
if (ret != 0) {
- error_report("could not configure %s (%s): %m", PATH_NET_TUN,
ifr.ifr_name);
+ if (ifname[0] != '\0') {
+ error_report("could not configure %s (%s): %m", PATH_NET_TUN,
ifr.ifr_name);
+ } else {
+ error_report("could not configure %s: %m", PATH_NET_TUN);
+ }
close(fd);
return -1;
}
--
1.7.7.rc3
