examples/var_service: use "exec sleep 5" instead of "{ sleep 5; exit; }"

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/examples/var_service/dhcp_if/run b/examples/var_service/dhcp_if/run
index d8f3435..882f008 100755
--- a/examples/var_service/dhcp_if/run
+++ b/examples/var_service/dhcp_if/run
@@ -8,7 +8,7 @@
 if="${PWD##*/dhcp_}"
 
 echo "* Upping iface $if"
-ip link set dev "$if" up || { sleep 5; exit; }
+ip link set dev "$if" up || exec sleep 5
 
 echo "* Starting udhcpc on $if [$$]"
 exec \
diff --git a/examples/var_service/dhcpd_if/run b/examples/var_service/dhcpd_if/run
index e3d1b00..82ac08a 100755
--- a/examples/var_service/dhcpd_if/run
+++ b/examples/var_service/dhcpd_if/run
@@ -8,7 +8,7 @@
 if="${PWD##*/dhcpd_}"
 
 echo "* Upping iface $if"
-ip link set dev $if up || { sleep 5; exit; }
+ip link set dev $if up || exec sleep 5
 
 >>udhcpd.leases
 sed 's/^interface.*$/interface '"$if/" -i udhcpd.conf
diff --git a/examples/var_service/ifplugd_if/run b/examples/var_service/ifplugd_if/run
index e781661..cfddfec 100755
--- a/examples/var_service/ifplugd_if/run
+++ b/examples/var_service/ifplugd_if/run
@@ -9,7 +9,7 @@
 if="${PWD##*/ifplugd_}"
 
 echo "* Upping iface $if"
-ip link set dev "$if" up || { sleep 5; exit; }
+ip link set dev "$if" up || exec sleep 5
 
 echo "* Starting ifplugd on $if [$$]"
 exec \
diff --git a/examples/var_service/supplicant_if/run b/examples/var_service/supplicant_if/run
index bc16fb6..5c813b0 100755
--- a/examples/var_service/supplicant_if/run
+++ b/examples/var_service/supplicant_if/run
@@ -9,7 +9,7 @@
 
 echo "* Upping iface $if"
 # "or sleep" idiom prevents rapid respawning if iface does not exist
-ip link set dev "$if" up || { sleep 5; exit; }
+ip link set dev "$if" up || exec sleep 5
 
 ##echo "* Powersave disable on $if"
 ##iw dev "$if" set power_save off
diff --git a/examples/var_service/zcip_if/run b/examples/var_service/zcip_if/run
index 6998232..69f8b9b 100755
--- a/examples/var_service/zcip_if/run
+++ b/examples/var_service/zcip_if/run
@@ -8,7 +8,7 @@
 if="${PWD##*/zcip_}"
 
 echo "* Upping iface $if"
-ip link set dev "$if" up || { sleep 5; exit; }
+ip link set dev "$if" up || exec sleep 5
 
 echo "* Starting zcip on $if [$$]"
 exec \