diff options
| -rw-r--r-- | sys/compat/linux/linux_ioctl.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/sys/compat/linux/linux_ioctl.c b/sys/compat/linux/linux_ioctl.c index a222592..9f8c956 100644 --- a/sys/compat/linux/linux_ioctl.c +++ b/sys/compat/linux/linux_ioctl.c @@ -2081,6 +2081,20 @@ linux_ifconf(struct thread *td, struct ifconf *uifc) if (error != 0) return (error); + /* handle the 'request buffer size' case */ + if (ifc.ifc_buf == NULL) { + ifc.ifc_len = 0; + TAILQ_FOREACH(ifp, &ifnet, if_link) { + TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { + struct sockaddr *sa = ifa->ifa_addr; + if (sa->sa_family == AF_INET) + ifc.ifc_len += sizeof(ifr); + } + } + error = copyout(&ifc, uifc, sizeof(ifc)); + return (error); + } + /* much easier to use uiomove than keep track ourselves */ iov.iov_base = ifc.ifc_buf; iov.iov_len = ifc.ifc_len; |
