I wrote a rc.d script to handle 'thin' processes on startup, however I couldn't stop it using "/etc/rc.d/thin stop". Check /etc/rc.subr, I noticed that "find_processes" looks for something in the ps output like:

5570      0 ruby19: /usr/local/bin/thin server (0.0.0.0:80) (ruby19)

whereas in my case, it is:

5570      0 ruby19: thin server (0.0.0.0:80) (ruby19)

Find attached a patch that would fix the problem.

For reference, here is my /etc/rc.d/thin:
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#!/bin/sh
#

# PROVIDE: thin
# REQUIRE: DAEMON
# BEFORE: LOGIN

. /etc/rc.subr

# Defaults.
thin_enable=${thin_enable:-"NO"}

name=thin
rcvar=thin_enable
app_path=/var/www/grecLeFroc

command="/usr/local/bin/${name}"
command_args="start -d -c ${app_path}/current -p 80 -e production"
command_interpreter="/usr/local/bin/ruby19"

pidfile="${app_path}/shared/pids/${name}.pid"

# Crucial (!) for execjs to find js runtime.
PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin:/root/bin

load_rc_config $name
run_rc_command "$1"
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