Increase NOFILE limit for tox-bootstrapd

tox-bootstrapd can use around 600 TCP sockets during TCP server's normal
functioning. Many systems default to having a soft limit of 1024 open file
descriptors, which we are close to reaching, so it was suggested we bump that
limit to a higher number. iphy suggested increasing it to 32768.

1 files changed, 33 insertions, 2 deletions

diff --git a/other/bootstrap_daemon/tox-bootstrapd.sh b/other/bootstrap_daemon/tox-bootstrapd.sh
index d33c38da..5f1e5c68 100644
--- a/other/bootstrap_daemon/tox-bootstrapd.sh
+++ b/other/bootstrap_daemon/tox-bootstrapd.sh
@@ -1,4 +1,4 @@
-#! /bin/sh
+#! /bin/bash
 ### BEGIN INIT INFO
 # Provides:          tox-bootstrapd
 # Required-Start:    $remote_fs $syslog
@@ -22,6 +22,35 @@ SCRIPTNAME=/etc/init.d/$NAME
 USER=tox-bootstrapd
 GROUP=tox-bootstrapd
 
+# Set ulimit -n based on number of fds available.
+# This check is borrowed from Debian's tor package, with a few modifications.
+if [ -r /proc/sys/fs/file-max ]; then
+        system_max=$(cat /proc/sys/fs/file-max)
+        if [ "$system_max" -gt "80000" ] ; then
+                MAX_FILEDESCRIPTORS=32768
+        elif [ "$system_max" -gt "40000" ] ; then
+                MAX_FILEDESCRIPTORS=16384
+        elif [ "$system_max" -gt "20000" ] ; then
+                MAX_FILEDESCRIPTORS=8192
+        elif [ "$system_max" -gt "10000" ] ; then
+                MAX_FILEDESCRIPTORS=4096
+        else
+                MAX_FILEDESCRIPTORS=1024
+                cat << EOF
+
+Warning: Your system has very few file descriptors available in total.
+
+Maybe you should try raising that by adding 'fs.file-max=100000' to your
+/etc/sysctl.conf file.  Feel free to pick any number that you deem appropriate.
+Then run 'sysctl -p'.  See /proc/sys/fs/file-max for the current value, and
+file-nr in the same directory for how many of those are used at the moment.
+
+EOF
+        fi
+else
+        MAX_FILEDESCRIPTORS=32768
+fi
+
 # Exit if the package is not installed
 [ -x "$DAEMON" ] || exit 0
 
@@ -48,6 +77,8 @@ do_start()
         fi
         chown $USER:$GROUP $PIDDIR
         start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON --test --chuid $USER > /dev/null || return 1
+        # TCP Server needs to be able to have lots of TCP sockets open.
+        ulimit -n $MAX_FILEDESCRIPTORS
         start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON --chuid $USER -- $DAEMON_ARGS || return 2
 }
 
@@ -113,4 +144,4 @@ case "$1" in
         exit 3
         ;;
 esac
-exit 0
\ No newline at end of file
+exit 0