Scripts about login recency.

has-logged-in-since.sh

@@ -0,0 +1,82 @@
+#!/bin/bash
+
+set -o errexit
+set -o nounset
+set -o pipefail
+shopt -s globstar nullglob
+
+function show-help ()
+{
+    local -ir retcode="${1:-1}"
+    cat >&2 <<EOF
+usage: $(basename "$0") [OPTION...] DAYS
+
+Report whether the invoking user has logged in within the past DAYS
+days, in the opinion of last(1).  DAYS is a positive integer.  Exit
+status is 0 if the answer is yes, or another value if the answer is no
+or an error occurred.
+
+OPTIONS
+  -v   Verbosity.  Repeat for more verbosity.
+  -h   This help.
+
+Examples
+   \$ $(basename "$0") 30
+   \$ $(basename "$0") -vv 90
+EOF
+   exit "$retcode"
+}
+#----------------------------------------------------------------------------
+
+declare -i VERBOSITY=0
+while getopts ":hv" opt
+do
+   case $opt in
+       v ) ((++VERBOSITY)) ;;
+       * ) show-help 0;;
+   esac
+done
+shift $((OPTIND - 1))
+#----------------------------------------------------------------------------
+
+function squawk ()
+{
+    local -i NVOL=$1; shift
+    if ((0 == NVOL)); then
+        echo >&2 "$(basename "$0") $(date +'%T %Z')" "$@"
+        exit 1
+    elif ((NVOL <= VERBOSITY)); then
+        echo "$(basename "$0") $(date +'%T %Z')" "$@"
+    fi
+    return 0
+}
+#----------------------------------------------------------------------------
+
+function login-count ()
+{
+    local -ir days="$1"
+    last --since -${days}days "$LOGNAME" | head --lines=-2 | wc -l
+    return 0
+}
+#----------------------------------------------------------------------------
+
+((1 == $#)) || show-help 99
+if [[ -z $1 || $1 = *[!0123456789]* || (($1 < 1)) ]]; then
+    squawk 0 "DAYS must be a positive integer."
+fi
+declare -ir days_ago="$1"
+
+squawk 1 "$(date --iso) started."
+
+declare -i main_return=1
+# shellcheck disable=SC2155
+declare -ir login_count="$(login-count "$days_ago")"
+squawk 1 "found $login_count logins by $LOGNAME since $days_ago days ago."
+if ((0 < login_count))
+then
+    main_return=0
+fi
+
+squawk 1 "done."
+
+exit $main_return

warn-no-recent-login.sh

@@ -0,0 +1,81 @@
+#!/bin/bash
+
+set -o errexit
+set -o nounset
+set -o pipefail
+shopt -s globstar nullglob
+
+function show-help ()
+{
+    local -ir retcode="${1:-1}"
+    cat >&2 <<EOF
+usage: $(basename "$0") [OPTION...] DAYS
+
+Warn if the invoking user has not logged in within the past DAYS days.
+
+OPTIONS
+  -v   Verbosity.  Repeat for more verbosity.
+  -h   This help.
+
+Examples
+   \$ $(basename "$0") 20
+   \$ $(basename "$0") -vv 30
+EOF
+   exit "$retcode"
+}
+#----------------------------------------------------------------------------
+
+declare -i VERBOSITY=0
+while getopts ":hv" opt
+do
+   case $opt in
+       v ) ((++VERBOSITY)) ;;
+       * ) show-help 0;;
+   esac
+done
+shift $((OPTIND - 1))
+#----------------------------------------------------------------------------
+
+function squawk ()
+{
+    local -i NVOL=$1; shift
+    if ((0 == NVOL)); then
+        echo >&2 "$(basename "$0") $(date +'%T %Z')" "$@"
+        exit 1
+    elif ((NVOL <= VERBOSITY)); then
+        echo "$(basename "$0") $(date +'%T %Z')" "$@"
+    fi
+    return 0
+}
+#----------------------------------------------------------------------------
+
+# Express the VERBOSITY as an option string.
+function vopt ()
+{
+    local str=""
+    if ((0 < VERBOSITY)); then
+        str="-v"
+    fi
+    for ((i = 1; i < VERBOSITY; i++)); do
+        str="${str}v"
+    done
+    echo "$str"
+    return 0
+}
+#----------------------------------------------------------------------------
+
+((1 == $#)) || show-help 99
+if [[ -z $1 || $1 = *[!0123456789]* || (($1 < 1)) ]]; then
+    squawk 0 "DAYS must be a positive integer."
+fi
+declare -ir days_ago="$1"
+
+squawk 1 "$(date --iso) started."
+
+if ! has-logged-in-since.sh $(vopt) "$days_ago"
+then
+    squawk 0 "no login by $LOGNAME in the past $days_ago days."
+fi
+squawk 1 "done."
+
+exit 0