bin/nicely: Add new working utility

1 files changed, 67 insertions, 0 deletions

diff --git a/bin/nicely b/bin/nicely
new file mode 100755
index 0000000..d062f02
--- /dev/null
+++ b/bin/nicely
@@ -0,0 +1,67 @@
+#!/bin/sh
+set -eu
+
+usage() {
+	cat <<-'EOF'
+		Usage:
+		  nicely COMMAND...
+		  nicely -h
+	EOF
+}
+
+help() {
+	cat <<-'EOF'
+
+
+		Options:
+		  -h, --help    show this message
+
+		  COMMAND       the command to be wrapped
+
+
+		Wrap COMMAND in nice(1) and ionice(1) calls, so that it gets low
+		priority from the OS scheduler and has low disturbance regarding
+		CPU usage and disk IO bandwidth.
+
+
+		Examples:
+
+		  Make the backup low priority:
+
+		    $ nicely backup
+	EOF
+}
+
+
+for flag in "$@"; do
+	case "$flag" in
+		(--)
+			break
+			;;
+		(--help)
+			usage
+			help
+			exit
+			;;
+		(*)
+			;;
+	esac
+done
+
+while getopts 'h' flag; do
+	case "$flag" in
+		(h)
+			usage
+			help
+			exit
+			;;
+		(*)
+			usage >&2
+			exit 2
+			;;
+	esac
+done
+shift $((OPTIND - 1))
+
+
+ionice -c3 nice -n19 "$@"