Patch for improving usability

[exuvo]

This patch addresses point 2 in #45.
It automatically runs journalctl if the systemctl call fails. It should detect if running in a user terminal or not and skip appropriately. I've done some testing on my system (Arch linux) and it seems to work but more testing is probably good given that netctl is widely used. Diff is against 1.4.-2.

--- /usr/bin/netctl 2014-02-24 11:12:42.021776261 +0100
+++ netctl  2014-02-24 11:12:34.088473909 +0100
@@ -40,6 +40,10 @@
     shift
     set -- $(sd_escape "$@")
     systemctl $command $(printf 'netctl@%s.service\n' "$@")
+    if [ $? -ne 0 ] && [ -t 1 ]; then
+      echo Command failed, last 1 min of log:
+      journalctl -n -o cat -u $(printf 'netctl@%s.service\n' "$@") --since=-1m
+    fi
 }

 list() {

[exuvo]

I realised that the previous patch does not return the systemctl return value, fixed in following patch:

--- /usr/bin/netctl 2014-02-25 13:56:56.820655496 +0100
+++ netctl  2014-02-25 13:56:46.454029902 +0100
@@ -40,6 +40,12 @@
     shift
     set -- $(sd_escape "$@")
     systemctl $command $(printf 'netctl@%s.service\n' "$@")
+    ret=$?
+    if [ $ret -ne 0 ] && [ -t 1 ]; then
+      echo Command failed, last 1 min of log:
+      journalctl -n -o cat -u $(printf 'netctl@%s.service\n' "$@") --since=-1m
+    fi
+    return $ret
 }

 list() {

[joukewitteveen]

This kind of behavior should come from systemctl, not from netctl. If you have problems with the output of systemctl in the case of failing units, complain with systemd.