[PATCH] Completion: _net_interfaces - try ip(8) first on linux

[Eric Cook <llua@xxxxxxx>]

Another tweak for linux, try to use ip(8) first and fallback to ifconfig or procfs if needed.
ifconfig(8) may truncate long interface names, without patches.

left the `*' case pattern since solaris uses it.

---
 Completion/Unix/Type/_net_interfaces | 27 ++++++++++++++++++---------
 1 file changed, 18 insertions(+), 9 deletions(-)

diff --git a/Completion/Unix/Type/_net_interfaces b/Completion/Unix/Type/_net_interfaces
index 6662872..2cac3e3 100644
--- a/Completion/Unix/Type/_net_interfaces
+++ b/Completion/Unix/Type/_net_interfaces
@@ -3,6 +3,10 @@
 local expl list intf sep
 local -a disp
 
+# Make sure needed tools are in the path.
+local PATH=$PATH
+PATH=/sbin:$PATH
+
 case $OSTYPE in
   aix*)
     intf=( ${(f)"$(lsdev -C -c if -F 'name:description')"} )
@@ -14,17 +18,22 @@ case $OSTYPE in
   ;;
   darwin*|freebsd*|dragonfly*) intf=( $(ifconfig -l) ) ;;
   irix*) intf=( ${${${(f)"$(/usr/etc/netstat -i)"}%% *}[2,-1]} ) ;;
+  *linux*)
+    if (( $+commands[ip] )); then
+      intf=( ${${(m)${(f)"$(ip -o link)"}#*: }%%: *} )
+    fi
+  ;&
 
   *)
-  # Make sure ifconfig is in the path.
-  local PATH=$PATH
-  PATH=/sbin:$PATH
-  intf=( $(ifconfig -a 2>/dev/null | sed -n 's/^\([^ 	:]*\).*/\1/p') )
-  if [[ ${#intf} -eq 0 && -d /proc/sys/net/ipv4/conf ]]; then
-    # On linux we used to use the following as the default.
-    # However, we now use ifconfig since it finds additional devices such
-    # as tunnels.  So only do this if that didn't work.
-    intf=( /proc/sys/net/ipv4/conf/*~*(all|default)(N:t) )
+  if [[ ${#intf} -eq 0 ]]; then
+    # linux's deprecated ifconfig may truncate long interface names
+    intf=( $(ifconfig -a 2>/dev/null | sed -n 's/^\([^ 	:]*\).*/\1/p') )
+    if [[ -d /proc/sys/net/ipv4/conf ]]; then
+      # On linux we used to use the following as the default.
+      # However, we now use ip or ifconfig since it finds additional devices such
+      # as tunnels.  So only do this if that didn't work.
+      intf=( /proc/sys/net/ipv4/conf/*~*(all|default)(N:t) )
+    fi
   fi
   ;;
 esac
-- 
2.1.0