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Lines 65-91
mount_svcdir()
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| 65 |
# By default VServer already has /proc mounted, but OpenVZ does not! |
65 |
# By default VServer already has /proc mounted, but OpenVZ does not! |
| 66 |
# However, some of our users have an old proc image in /proc |
66 |
# However, some of our users have an old proc image in /proc |
| 67 |
# NFC how they managed that, but the end result means we have to test if |
67 |
# NFC how they managed that, but the end result means we have to test if |
| 68 |
# /proc actually works or not. We to this by comparing two reads of |
68 |
# /proc actually works or not. We do this by comparing two reads of |
| 69 |
# /proc/self/stat. They will not match, because at least the minor fault count |
69 |
# /proc/self/environ. We set an environment variable before the first |
| 70 |
# field (field 10) should have changed. |
70 |
# read which we do not set before the second read, so |
| 71 |
# |
71 |
# if the comparison comes back equal, we know that /proc is not working. |
| 72 |
# We can use any file here that fills the following requirements: |
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| 73 |
# - changes between sequential reads |
| 74 |
# - is world-readable (not blocked in hardened kernel) |
| 75 |
# - Is only a single line (ergo entire check is doable with no forks) |
| 76 |
mountproc=true |
72 |
mountproc=true |
| 77 |
f=/proc/self/stat |
73 |
f=/proc/self/environ |
| 78 |
if [ -e $f ]; then |
74 |
if [ -e $f ]; then |
| 79 |
exec 9<$f ; read a <&9 ; exec 9<&- |
75 |
if [ "$(VAR=a cat $f)" = "$(cat $f)" ]; then |
| 80 |
exec 9<$f ; read b <&9 ; exec 9<&- |
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| 81 |
if [ "$a" = "$b" ]; then |
| 82 |
eerror "You have cruft in /proc that should be deleted" |
76 |
eerror "You have cruft in /proc that should be deleted" |
| 83 |
else |
77 |
else |
| 84 |
einfo "/proc is already mounted, skipping" |
78 |
einfo "/proc is already mounted, skipping" |
| 85 |
mountproc=false |
79 |
mountproc=false |
| 86 |
fi |
80 |
fi |
| 87 |
fi |
81 |
fi |
| 88 |
unset a b f |
82 |
unset f |
| 89 |
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83 |
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| 90 |
if $mountproc; then |
84 |
if $mountproc; then |
| 91 |
procfs="proc" |
85 |
procfs="proc" |
