fixup! tests: revert to using netcat for sending passphrase to nested vm

using tcp socket file caused the VM to keep waiting

Signed-off-by: Zeyad Gouda <[email protected]>

tests/lib/external/snapd-testing-tools/remote/remote.wait-for

@@ -1,4 +1,4 @@
-#!/bin/bash -e
+#!/bin/bash -xe
 
 # The default values have been selected trying to match with most of
 # the wait times in the tests and also trying to follow common sense.
@@ -123,7 +123,7 @@ wait_for_reboot() {
             # Wait for passphrase prompt from serial log file.
             if MATCH "Please enter the passphrase" < ${log_file}; then
                 # Enter passphrase to continue boot.
-                echo "$expect_passphrase" > /dev/tcp/localhost/7777
+                echo "$expect_passphrase" | netcat -N localhost 7777
                 break
             fi
             sleep "$wait"

tests/lib/nested.sh

@@ -1373,7 +1373,7 @@ nested_start_core_vm_unit() {
         # Wait for passphrase prompt from serial log file.
         retry -n 120 --wait 1 sh -c "MATCH \"Please enter the passphrase\" < ${NESTED_LOGS_DIR}/serial.log"
         # Enter passphrase to continue boot.
-        echo "$EXPECT_PASSPHRASE" > /dev/tcp/localhost/7777
+        echo "$EXPECT_PASSPHRASE" | netcat -N localhost 7777
     fi
 
     local EXPECT_SHUTDOWN
@@ -1608,7 +1608,7 @@ nested_start_classic_vm() {
         # XXX: remove once we no longer support xenial hosts
         PARAM_SERIAL="-serial file:${NESTED_LOGS_DIR}/serial.log"
     else
-        PARAM_SERIAL="-chardev socket,path=${NESTED_LOGS_DIR}/serial.sock,server=on,wait=off,id=char0,logfile=${NESTED_LOGS_DIR}/serial.log,logappend=on -serial chardev:char0"
+        PARAM_SERIAL="-chardev socket,telnet=on,host=localhost,server=on,port=7777,wait=off,id=char0,logfile=${NESTED_LOGS_DIR}/serial.log,logappend=on -serial chardev:char0"
     fi
     PARAM_BIOS=""
     PARAM_TPM=""