timer-mail: use journald instead of tempfile.

files/timer-mail

@@ -1,4 +1,5 @@
 #!/usr/bin/env sh
+# vim: set noet sw=2 ts=2 sts=2:
 
 help() {
   [ 0 -lt $# ] && >&2 echo "$*"
@@ -10,14 +11,23 @@ Options:
   -t TO       default: your login-user
   -f FROM     default: your login-user
   -s SUBJECT  default: "timer: [command *args]"
-  -v          pipes output through
   -e          send email only on error (command exit-code != 0)
   -o          send email only if command writes on STDOUT or STDERR (default)
   -a          send always email
 EOF
-  exit 1
+  exit 42
 }
 
+if [ -z "$INVOCATION_ID" ]
+then
+	>&2 echo 'No INVOCATION_ID set, not running systemd?'
+fi
+
+subject=
+on=
+to=
+from=
+
 eval set -- "$(getopt -n "$0" "ht:f:s:aev" "$@")"
 while [ 0 -lt $# ]
 do
@@ -29,7 +39,6 @@ do
 	-e) on=error ;;
 	-o) on=output ;;
 	-a) on=always ;;
-  -v) verbose=true ;;
 	--) shift ; break ;;
 	*) help "Unknown option: $1" ;;
 	esac
@@ -38,25 +47,24 @@ done
 
 subject="${subject:-timer: $*}"
 on=${on:-output}
-verbose=${verbose:-false}
 to="${to:-${LOGNAME:-$USER}}"
 from="${from:-${LOGNAME:-$USER}}"
 
-output="$(mktemp)"
-trap "rm -f -- $output" EXIT
+"$@"
+r=$?
 
-if $verbose
-then
-  2>&1 "$@" | tee $output
-  r=$?
-else
-  >$output 2>&1 "$@"
-  r=$?
-fi
+# should a mail be sent?
+mm=false
+case "$on" in
+always) mm=true ;;
+error)	[ 0 -lt $r ] && mm=true ;;
+output) journalctl -n1 _SYSTEMD_INVOCATION_ID="$INVOCATION_ID" | grep -sqm1 "\S" && mm=true ;;
+esac
 
-if [ always = $on ] || [ error = $on -a 0 -lt $r ] || [ output = $on -a -s $output ]
+if $mm
 then
-  <$output  mail -s "$subject" -r "$from" -- "$to" || exit 97
+  journalctl _SYSTEMD_INVOCATION_ID="$INVOCATION_ID" + INVOCATION_ID="$INVOCATION_ID" + USER_INVOCATION_ID="$INVOCATION_ID"  |  \
+		mail -s "$subject" -r "$from" -- "$to"  ||  exit 97
 fi
 
 exit $r