.github/workflows/CICD.yml: Create a fully fake utmp

Looks like the "system boot" entry is not present in /var/lib/utmp
on recent ubuntu-latest images.

Not totally clear why it disappeared, but let's just create a fake
one instead.

Author: drinkcat

.github/workflows/CICD.yml

@@ -718,11 +718,13 @@ jobs:
             sudo apt-get -y update
             sudo apt-get -y install libselinux1-dev
             # pinky is a tool to show logged-in users from utmp, and gecos fields from /etc/passwd.
-            # In GitHub Action *nix VMs, no accounts log in, even the "runner" account that runs the commands. The account also has empty gecos fields.
-            # To work around this for pinky tests, we create a fake login entry for the GH runner account...
-            FAKE_UTMP='[7] [999999] [tty2] [runner] [tty2] [] [0.0.0.0] [2022-02-22T22:22:22,222222+00:00]'
-            # ... by dumping the login records, adding our fake line, then reverse dumping ...
-            (utmpdump /var/run/utmp ; echo $FAKE_UTMP) | sudo utmpdump -r -o /var/run/utmp
+            # In GitHub Action *nix VMs, no accounts log in, even the "runner" account that runs the commands, and "system boot" entry is missing.
+            # The account also has empty gecos fields.
+            # To work around these issues for pinky (and who) tests, we create a fake utmp file with a
+            # system boot entry and a login entry for the GH runner account.
+            FAKE_UTMP_2='[2] [00000] [~~  ] [reboot] [~   ] [6.0.0-test] [0.0.0.0] [2022-02-22T22:11:22,222222+00:00]'
+            FAKE_UTMP_7='[7] [999999] [tty2] [runner] [tty2] [          ] [0.0.0.0] [2022-02-22T22:22:22,222222+00:00]'
+            (echo "$FAKE_UTMP_2" ; echo "$FAKE_UTMP_7") | sudo utmpdump -r -o /var/run/utmp
             # ... and add a full name to each account with a gecos field but no full name.
             sudo sed -i 's/:,/:runner name,/' /etc/passwd
             # We also create a couple optional files pinky looks for
@@ -1090,11 +1092,13 @@ jobs:
           ubuntu-latest)
             sudo apt-get -y update ; sudo apt-get -y install libselinux1-dev
             # pinky is a tool to show logged-in users from utmp, and gecos fields from /etc/passwd.
-            # In GitHub Action *nix VMs, no accounts log in, even the "runner" account that runs the commands. The account also has empty gecos fields.
-            # To work around this for pinky tests, we create a fake login entry for the GH runner account...
-            FAKE_UTMP='[7] [999999] [tty2] [runner] [tty2] [] [0.0.0.0] [2022-02-22T22:22:22,222222+00:00]'
-            # ... by dumping the login records, adding our fake line, then reverse dumping ...
-            (utmpdump /var/run/utmp ; echo $FAKE_UTMP) | sudo utmpdump -r -o /var/run/utmp
+            # In GitHub Action *nix VMs, no accounts log in, even the "runner" account that runs the commands, and "system boot" entry is missing.
+            # The account also has empty gecos fields.
+            # To work around these issues for pinky (and who) tests, we create a fake utmp file with a
+            # system boot entry and a login entry for the GH runner account.
+            FAKE_UTMP_2='[2] [00000] [~~  ] [reboot] [~   ] [6.0.0-test] [0.0.0.0] [2022-02-22T22:11:22,222222+00:00]'
+            FAKE_UTMP_7='[7] [999999] [tty2] [runner] [tty2] [          ] [0.0.0.0] [2022-02-22T22:22:22,222222+00:00]'
+            (echo "$FAKE_UTMP_2" ; echo "$FAKE_UTMP_7") | sudo utmpdump -r -o /var/run/utmp
             # ... and add a full name to each account with a gecos field but no full name.
             sudo sed -i 's/:,/:runner name,/' /etc/passwd
             # We also create a couple optional files pinky looks for