unfinished command "slice"

WIP

1 files changed, 47 insertions, 0 deletions

diff --git a/slice b/slice
new file mode 100755
index 0000000..44ae13e
--- /dev/null
+++ b/slice
@@ -0,0 +1,47 @@
+#!/bin/bash
+default_percent='50'
+keep_env=(XAUTHORITY DISPLAY)
+set -e
+
+usage()
+{
+    cat <<EOF
+Usage: $0 [percentage]% [--] command [arguments...]
+
+    The [percentage] argument must end with a literal '%'.
+
+    E.g.:
+
+        slice 50% firefox
+
+    The command cannot start with a literal '-'.
+EOF
+}
+
+percent=$1
+case "$1" in
+    --) percent=$default_percent ;;
+    '' | -*) usage >&2; exit 1;;
+    *.*%) percent=${1%.*} ;;
+    *%) percent=${1%\%} ;;
+esac
+[ "$percent" -ge 0 ]
+[ "$percent" -le 100 ]
+
+shift
+case "$1" in
+    --) shift ;;
+esac
+unit_name=$1
+
+keep_env_opts=()
+for v in "${keep_env[@]}"
+do
+    keep_env_opts+=(-E "${!v}")
+done
+
+systemd-run -u "$unit_name" \
+            "${keep_env_opts[@]}"
+            "$0" "$@"
+            "$@"
+