1 | #!/bin/sh
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2 | ########################################################################
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3 | # Begin mountvirtfs
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4 | #
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5 | # Description : Ensure proc, sysfs, run, and dev are mounted
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6 | #
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7 | # Authors : Gerard Beekmans - gerard@linuxfromscratch.org
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8 | # DJ Lucas - dj@linuxfromscratch.org
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9 | # Update : Bruce Dubbs - bdubbs@linuxfromscratch.org
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10 | # Xi Ruoyao - xry111@xry111.site
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11 | #
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12 | # Version : LFS 12.0
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13 | #
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14 | ########################################################################
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15 |
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16 | ### BEGIN INIT INFO
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17 | # Provides: mountvirtfs
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18 | # Required-Start: $first
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19 | # Should-Start:
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20 | # Required-Stop:
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21 | # Should-Stop:
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22 | # Default-Start: S
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23 | # Default-Stop:
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24 | # Short-Description: Mounts various special fs needed at start
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25 | # Description: Mounts /sys and /proc virtual (kernel) filesystems.
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26 | # Mounts /run (tmpfs) and /dev (devtmpfs).
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27 | # This is done only if they are not already mounted.
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28 | # with the kernel config proposed in the book, dev
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29 | # should be automatically mounted by the kernel.
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30 | # X-LFS-Provided-By: LFS
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31 | ### END INIT INFO
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32 |
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33 | . /lib/lsb/init-functions
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34 |
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35 | case "${1}" in
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36 | start)
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37 | # Make sure /run is available before logging any messages
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38 | if ! mountpoint /run >/dev/null; then
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39 | mount /run || failed=1
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40 | fi
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41 |
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42 | mkdir -p /run/lock
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43 | chmod 1777 /run/lock
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44 |
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45 | log_info_msg "Mounting virtual file systems: ${INFO}/run"
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46 |
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47 | if ! mountpoint /proc >/dev/null; then
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48 | log_info_msg2 " ${INFO}/proc"
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49 | mount -o nosuid,noexec,nodev /proc || failed=1
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50 | fi
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51 |
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52 | if ! mountpoint /sys >/dev/null; then
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53 | log_info_msg2 " ${INFO}/sys"
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54 | mount -o nosuid,noexec,nodev /sys || failed=1
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55 | fi
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56 |
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57 | if ! mountpoint /dev >/dev/null; then
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58 | log_info_msg2 " ${INFO}/dev"
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59 | mount -o mode=0755,nosuid /dev || failed=1
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60 | fi
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61 |
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62 | mkdir -p /dev/shm
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63 | log_info_msg2 " ${INFO}/dev/shm"
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64 | mount -o nosuid,nodev /dev/shm || failed=1
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65 |
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66 | (exit ${failed})
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67 | evaluate_retval
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68 | if [ "${failed}" = 1 ]; then
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69 | exit 1
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70 | fi
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71 |
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72 | log_info_msg "Create symlinks in /dev targeting /proc: ${INFO}/dev/stdin"
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73 | ln -sf /proc/self/fd/0 /dev/stdin || failed=1
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74 |
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75 | log_info_msg2 " ${INFO}/dev/stdout"
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76 | ln -sf /proc/self/fd/1 /dev/stdout || failed=1
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77 |
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78 | log_info_msg2 " ${INFO}/dev/stderr"
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79 | ln -sf /proc/self/fd/2 /dev/stderr || failed=1
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80 |
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81 | log_info_msg2 " ${INFO}/dev/fd"
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82 | ln -sf /proc/self/fd /dev/fd || failed=1
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83 |
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84 | if [ -e /proc/kcore ]; then
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85 | log_info_msg2 " ${INFO}/dev/core"
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86 | ln -sf /proc/kcore /dev/core || failed=1
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87 | fi
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88 |
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89 | (exit ${failed})
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90 | evaluate_retval
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91 | exit $failed
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92 | ;;
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93 |
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94 | *)
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95 | echo "Usage: ${0} {start}"
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96 | exit 1
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97 | ;;
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98 | esac
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99 |
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100 | # End mountvirtfs
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