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| author | Luiz Capitulino <lcapitulino@redhat.com> | 2011-10-14 15:05:10 -0300 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> | 2011-11-01 06:23:48 +0000 |
| commit | 93a7320e32a2b7463c4dc3cfb5a0c77c46d8e687 (patch) | |
| tree | e4ce2cb907c3da1841a48a3e092354c388f33cbb /net/tap-linux.c | |
| parent | ff74c5a9a91c6dbf1017195462aa4176f7381240 (diff) | |
| download | qemu-93a7320e32a2b7463c4dc3cfb5a0c77c46d8e687.zip qemu-93a7320e32a2b7463c4dc3cfb5a0c77c46d8e687.tar.gz qemu-93a7320e32a2b7463c4dc3cfb5a0c77c46d8e687.tar.bz2 | |
net: tap-linux: Fix unhelpful error message
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 <lcapitulino@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Diffstat (limited to 'net/tap-linux.c')
| -rw-r--r-- | 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; } |