postinst

#!/bin/bash
set -e

mkdir -p /var/spool/greyhole
chmod 777 /var/spool/greyhole
/usr/bin/greyhole --create-mem-spool >/dev/null
mkdir -p /var/cache/greyhole-dfree
chmod 777 /var/cache/greyhole-dfree

if [ -d /usr/lib/x86_64-linux-gnu/samba/vfs ]; then
    SOURCE_LIBDIR="/usr/lib64" # Makefile will always install Greyhole .so files in /usr/lib64, for x86_64 CPUs. @see Makefile
    TARGET_LIBDIR="/usr/lib/x86_64-linux-gnu"
elif [ "`uname -m`" = "x86_64" ]; then
    SOURCE_LIBDIR="/usr/lib64"
    TARGET_LIBDIR="/usr/lib64"
    
    # For Ubuntu, where even x86_64 install use /usr/lib
    if [ -d /usr/lib/samba/vfs/ ]; then
        TARGET_LIBDIR="/usr/lib"
    fi
else
    SOURCE_LIBDIR="/usr/lib"
    TARGET_LIBDIR="/usr/lib"
fi

if [ ! -d ${TARGET_LIBDIR}/samba/vfs/ ]; then
    # Maybe samba-vfs-modules is missing?
    if [ -d /usr/lib/x86_64-linux-gnu ]; then
        SOURCE_LIBDIR="/usr/lib64" # Makefile will always install Greyhole .so files in /usr/lib64, for x86_64 CPUs. @see Makefile
        TARGET_LIBDIR="/usr/lib/x86_64-linux-gnu"
    else
        SOURCE_LIBDIR="/usr/lib"
        TARGET_LIBDIR="/usr/lib"
    fi
fi

if [ ! -d ${TARGET_LIBDIR}/samba/vfs/ ]; then
    mkdir ${TARGET_LIBDIR}/samba/vfs/
fi

TARGET_SYMLINK="${TARGET_LIBDIR}/samba/vfs/greyhole.so"

SMB_VERSION="`smbd --version | awk '{print $2}' | awk -F'-' '{print $1}' | awk -F'.' '{print $1,$2}'`"
if [ "${SMB_VERSION}" = "3 4" ]; then
    LIB_FILE="greyhole-samba34.so"
elif [ "${SMB_VERSION}" = "3 5" ]; then
    LIB_FILE="greyhole-samba35.so"
elif [ "${SMB_VERSION}" = "3 6" ]; then
    LIB_FILE="greyhole-samba36.so"
elif [ "${SMB_VERSION}" = "4 0" ]; then
    LIB_FILE="greyhole-samba40.so"
elif [ "${SMB_VERSION}" = "4 1" ]; then
    LIB_FILE="greyhole-samba41.so"
elif [ "${SMB_VERSION}" = "4 2" ]; then
    LIB_FILE="greyhole-samba42.so"
elif [ "${SMB_VERSION}" = "4 3" ]; then
    LIB_FILE="greyhole-samba43.so"
elif [ "${SMB_VERSION}" = "4 4" ]; then
    LIB_FILE="greyhole-samba44.so"
else
	echo "Warning: Greyhole doesn't include a VFS module for your version of Samba (${SMB_VERSION})."
	echo "We will try to use the VFS for Samba 4.4, but that might not work."
    LIB_FILE="greyhole-samba44.so"
fi

SOURCE_LIB="${SOURCE_LIBDIR}/greyhole/${LIB_FILE}"

rm -f ${TARGET_SYMLINK}
ln -s ${SOURCE_LIB} ${TARGET_SYMLINK}

# Bugfix for Ubuntu / Debian that are missing symlinks in ${TARGET_LIBDIR}/samba/
MAJOR_SMB_VERSION="`smbd --version | awk '{print $2}' | awk -F'-' '{print $1}' | awk -F'.' '{print $1}'`"
if [ "${MAJOR_SMB_VERSION}" = "4" ]; then
	if [ -f ${TARGET_LIBDIR}/samba/libsmbd_base.so.0 ]; then
	    if [ ! -f ${TARGET_LIBDIR}/samba/libsmbd_base.so ]; then
	        ln -s ${TARGET_LIBDIR}/samba/libsmbd_base.so.0 ${TARGET_LIBDIR}/samba/libsmbd_base.so
	    fi
	else
	    if [ ! -f ${TARGET_LIBDIR}/samba/libsmbd-base-samba4.so ]; then
	        if [ -f ${TARGET_LIBDIR}/samba/libsmbd-base.so.0 ]; then
	            ln -s ${TARGET_LIBDIR}/samba/libsmbd-base.so.0 ${TARGET_LIBDIR}/samba/libsmbd-base-samba4.so
	        else
	            echo "Error: missing dependent library libsmbd-base.so.0 (libsmbd-base-samba4.so)"
	            exit -1
	        fi
	    fi
	    if [ ! -f ${TARGET_LIBDIR}/samba/libsamba-debug-samba4.so ]; then
	        if [ -f ${TARGET_LIBDIR}/samba/libsamba-debug.so.0 ]; then
		        ln -s ${TARGET_LIBDIR}/samba/libsamba-debug.so.0 ${TARGET_LIBDIR}/samba/libsamba-debug-samba4.so
		    elif [ -f ${TARGET_LIBDIR}/libsamba-util.so.0 ]; then
		        ln -s ${TARGET_LIBDIR}/libsamba-util.so.0 ${TARGET_LIBDIR}/samba/libsamba-debug-samba4.so
	        else
	            echo "Error: missing dependent library libsamba-debug.so.0 (libsamba-debug-samba4.so)"
	            exit -1
	        fi
	    fi
	fi
fi

if [ -f /proc/fs/cifs/OplockEnabled ]; then
	# cifs client workaround
	# Ref: http://blog.dhampir.no/content/cifs-vfs-no-response-for-cmd-n-mid
	modprobe cifs
	echo 0 > /proc/fs/cifs/OplockEnabled
fi
if [ -f /sys/module/cifs/parameters/enable_oplocks ]; then
	# cifs client workaround
	# Ref: http://blog.dhampir.no/content/cifs-vfs-no-response-for-cmd-n-mid
	modprobe cifs enable_oplocks=0
	echo 0 > /sys/module/cifs/parameters/enable_oplocks
fi

uses_systemd=`stat -c '%N' /proc/1/exe | grep systemd | wc -l`

running=0
if [ -f /sbin/start -a $uses_systemd -eq 0 ]; then
	# Using Upstart instead of SYSV init.d
	rm -f /etc/init.d/greyhole
	if [ -f /etc/init/greyhole.conf ]; then
		if [ "`status greyhole | grep running | wc -l`" = "1" ]; then
			restart greyhole
			running=1
		fi
	fi
else
	# (SYSV) Service install & start
	rm -f /etc/init/greyhole.conf
	if [ -f /etc/init.d/mysql ]; then
	    sed -i 's/mysqld/mysql/' /etc/init.d/greyhole
    fi
    if [ -f /etc/init.d/smbd ]; then
        sed -i 's/smb$/smbd/' /etc/init.d/greyhole
    elif [ -f /etc/init.d/samba ]; then
        sed -i 's/smb/samba/' /etc/init.d/greyhole
    fi
	if [ -f /sbin/chkconfig ]; then
		/sbin/chkconfig --add greyhole
		/sbin/chkconfig greyhole on
	else
		/usr/sbin/update-rc.d greyhole defaults
	fi
	if [ -f /etc/init.d/greyhole ]; then
		if [ "`service greyhole stat 2> /dev/null | grep 'is running' | wc -l`" = "1" ]; then
			service greyhole restart
			running=1
		fi
	fi
fi

if [ $running -eq 0 ]; then
	echo "==========================================================================="
	echo "See /usr/share/greyhole/USAGE to learn how to configure and start Greyhole."
	echo "==========================================================================="
fi

man logrotate > /dev/null 2>&1 || echo "Warning! logrotate is not installed. You should install logrotate to make sure the Greyhole logs don't fill your root partition.
  Greyhole already installed the necessary conf file for logrotate; simply installing the logrotate package is enough."