new command: sliceweasel

sliceweasel starts iceweasel with max 50% system memory available to it

it requires sudo

1 files changed, 26 insertions, 0 deletions

diff --git a/dot/local/bin/sliceweasel b/dot/local/bin/sliceweasel
new file mode 100644
index 0000000..944f12a
--- /dev/null
+++ b/dot/local/bin/sliceweasel
@@ -0,0 +1,26 @@
+#!/bin/bash
+
+command=iceweasel
+memory_ratio=0.5
+control_group=$command
+
+as_root=sudo
+
+total_memory() { free -b | (read line; read Mem total _; echo $total); }
+mkdir_idem() { [ -d "$1" ] || $as_root mkdir "$1"; }
+out() { $as_root tee "$@" >/dev/null; }
+
+total_memory=$(total_memory) || exit 1
+memory_limit_in_bytes=$(bc -q <<< "$total_memory * $memory_ratio / 1" )
+control_group_dir=/sys/fs/cgroup/memory/"$control_group"
+
+mkdir_idem "$control_group_dir"
+out "$control_group_dir"/memory.limit_in_bytes <<< $memory_limit_in_bytes
+
+# This method works (tested).
+# username=$(id -u)
+# exec sudo -E -- cgexec -g memory:"$control_group" -- su "$username" -c "exec $command"
+
+# This method is untested.  Should work the same.
+out "$control_group_dir"/cgroup.procs <<< $$
+exec $command