| 1 | <sect1 id="postlfs-config-netfs" xreflabel="netfs">
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| 2 | <?dbhtml filename="netfs.html" dir="postlfs"?>
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| 3 | <title>Configuring for Network Filesystems</title>
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| 4 |
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| 5 | <para>While <acronym>LFS</acronym> is capable of mounting NFS volumes from
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| 6 | the get go, the lfs-bootscripts are not quite ready for this configuration.
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| 7 | Network filesystems should be unmounted before the network goes down. The
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| 8 | <filename>netfs</filename> script below will prepare your LFS for mounting
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| 9 | network filesystems at boot time, and unmounting them when the network
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| 10 | is stopped.</para>
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| 11 |
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| 12 | <para> The following commands will create the <filename>netfs</filename>
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| 13 | script:</para>
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| 14 |
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| 15 | <screen><command>cat > /etc/rc.d/init.d/netfs << "EOF"</command>
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| 16 | #!/bin/sh
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| 17 | # Begin $rc_base/init.d/netfs
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| 18 |
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| 19 | # Based on sysklogd script from LFS-3.1 and earlier.
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| 20 | # Rewritten by Gerard Beekmans - gerard@linuxfromscratch.org
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| 21 | # netfs script written by Nathan Coulson - conathan@conet.dyndns.org
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| 22 | # and by DJ Lucas - dj@lucasit.com
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| 23 |
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| 24 | . /etc/sysconfig/rc
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| 25 | . $rc_functions
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| 26 |
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| 27 | case "$1" in
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| 28 |
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| 29 | start)
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| 30 | # The following line mounts all entries in fstab that
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| 31 | # have the _netdev option. This is required for network
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| 32 | # filesystems to be mounted at boot time.
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| 33 | echo "Mounting network volumes..."
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| 34 | mount -a -O _netdev
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| 35 | evaluate_retval
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| 36 | ;;
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| 37 |
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| 38 | stop)
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| 39 | echo -n "Unmounting network volumes..."
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| 40 |
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| 41 | # The following line obtains a list from the output of
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| 42 | # mount for all netfs types and anything that was
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| 43 | # mounted with the _netdev option.
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| 44 | NETMOUNTS=`mount | grep '_netdev\|smbfs\|ncpfs|\coda\|nfs' \
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| 45 | | cut -d " " -f 3 | sed 's/$/ /g'`
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| 46 |
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| 47 | # Check to see if anything was listed from above
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| 48 | # (see if anything is actually needs to be unmounted)
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| 49 | if [ x"$NETMOUNTS" != x ]
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| 50 | then
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| 51 | # There is something mounted
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| 52 | # terminate the echo -n above
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| 53 | echo " "
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| 54 |
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| 55 | # Try and stop processes the nice way
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| 56 | # (probably won't work in most cases)
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| 57 | fuser -m -SIGTERM $NETMOUNTS > /dev/null
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| 58 |
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| 59 | # Check and see if it found anything. If it
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| 60 | # did, then give 3 seconds for things to exit
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| 61 | # the nice way before killing them off.
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| 62 | # This one will work all of the time!
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| 63 | if [ $? == 0 ]
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| 64 | then
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| 65 | sleep 3
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| 66 | fuser -km $NETMOUNTS > /dev/null
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| 67 | fi
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| 68 |
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| 69 | # We now need to unmount all network filesystems.
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| 70 | # We will do this with two umount commands to allow
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| 71 | # for broken behavior of smbmount, and also to make
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| 72 | # certain that netmounts without the _netdev option
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| 73 | # will still get unmounted.
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| 74 | umount -a -O _netdev
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| 75 | # save the retval
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| 76 | if [ $? != 0 ]
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| 77 | then
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| 78 | NERRVAL=1
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| 79 | fi
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| 80 |
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| 81 | # Now catch the rest of the network filesystems
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| 82 | # by fstype. This list can be extended later as
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| 83 | # more network filesystems are supported by mount.
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| 84 | umount -a -t coda,ncpfs,nfs,smbfs
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| 85 | if [ $? == 0]
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| 86 | then
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| 87 | [ -z $NERRVAL ]
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| 88 | evaluate_retval
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| 89 | else
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| 90 | # make certain that we return an error
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| 91 | /bin/false
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| 92 | evaluate_retval
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| 93 | fi
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| 94 | else
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| 95 | # There is nothing mounted
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| 96 | echo "No network volumes mounted!"
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| 97 | # print a nice '[ OK ]' message
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| 98 | evaluate_retval
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| 99 | fi
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| 100 | ;;
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| 101 |
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| 102 | *)
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| 103 | echo "Usage: $0 {start|stop}"
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| 104 | exit 1
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| 105 | ;;
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| 106 | esac
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| 107 |
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| 108 | # End $rc_base/init.d/netfs
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| 109 | EOF
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| 110 | <command>chmod 0755 /etc/rc.d/init.d/netfs</command></screen>
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| 111 |
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| 112 | <para>While the excessive comments in the script might make people cringe, the
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| 113 | important part to note is that network filesystems that should be mounted at
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| 114 | boot time, must have the <emphasis role="strong">_netdev</emphasis>
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| 115 | option passed to them in <filename>/etc/fstab</filename>.</para>
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| 116 |
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| 117 | <para>Now put the necessary symlinks in place.</para>
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| 118 |
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| 119 | <screen><command>ln -sf ../init.d/netfs /etc/rc.d/rc0.d/K47netfs &&
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| 120 | ln -sf ../init.d/netfs /etc/rc.d/rc1.d/K47netfs &&
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| 121 | ln -sf ../init.d/netfs /etc/rc.d/rc2.d/K47netfs &&
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| 122 | ln -sf ../init.d/netfs /etc/rc.d/rc3.d/S28netfs &&
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| 123 | ln -sf ../init.d/netfs /etc/rc.d/rc4.d/S28netfs &&
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| 124 | ln -sf ../init.d/netfs /etc/rc.d/rc5.d/S28netfs &&
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| 125 | ln -sf ../init.d/netfs /etc/rc.d/rc6.d/K47netfs</command></screen>
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| 126 |
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| 127 | </sect1>
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