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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