postinst is in openjdk-11-jre-headless 10.0.1+10-3ubuntu1.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 | #!/bin/sh
set -e
multiarch=x86_64-linux-gnu
priority=1101
basedir=/usr/lib/jvm/java-11-openjdk-amd64
mandir=$basedir/man
srcext=1.gz
dstext=1.gz
jre_tools='rmid java keytool jjs pack200 rmiregistry unpack200 orbd servertool tnameserv'
case "$1" in
configure)
# fail early. java currently uses tricks to find its own shared
# libraries depending on the path of the binary. Will be changed
# in OpenJDK7
if ! mountpoint -q /proc; then
echo >&2 "the java command requires a mounted proc fs (/proc)."
exit 1
fi
[ -d /etc/.java ] || mkdir -m 755 /etc/.java
[ -d /etc/.java/.systemPrefs ] || mkdir -m 755 /etc/.java/.systemPrefs
if [ ! -f /etc/.java/.systemPrefs/.system.lock ]; then
touch /etc/.java/.systemPrefs/.system.lock
chmod 644 /etc/.java/.systemPrefs/.system.lock
fi
if [ ! -f /etc/.java/.systemPrefs/.systemRootModFile ]; then
touch /etc/.java/.systemPrefs/.systemRootModFile
chmod 644 /etc/.java/.systemPrefs/.systemRootModFile
fi
if [ -z "$2" ]; then
update_alternatives=y
fi
if [ -n "$multiarch" ] && [ -n "$2" ]; then
for i in $jre_tools; do
if [ -z "$(update-alternatives --list $i 2>/dev/null | grep ^$basedir/)" ]; then
update_alternatives=y
break
fi
done
fi
if [ "$update_alternatives" != y ] && [ $priority -gt 1060 ]; then
for i in $jre_tools; do
oldp=$(update-alternatives --query java | awk -v b=$basedir '/^Alternative:/ && $2~b {p=1} /^Priority:/ && p {print $2; exit}')
if [ -n "$oldp" ] && [ "$oldp" -le 1060 ]; then
update_alternatives=y
break
fi
done
fi
if [ "$update_alternatives" = y ]; then
if [ -n "$multiarch" ] && [ "$DPKG_MAINTSCRIPT_ARCH" != $(dpkg --print-architecture) ]; then
priority=$(expr $priority - 1)
fi
for i in $jre_tools; do
unset slave1 slave2 || true
if [ -e $mandir/man1/$i.$srcext ]; then
slave1="--slave \
/usr/share/man/man1/$i.$dstext \
$i.$dstext \
$mandir/man1/$i.$srcext"
fi
# disabled
if false && [ -e $mandir/ja/man1/$i.$srcext ]; then
slave2="--slave \
/usr/share/man/ja/man1/$i.$dstext \
${i}_ja.$dstext \
$mandir/ja/man1/$i.$srcext"
fi
update-alternatives \
--install \
/usr/bin/$i \
$i \
$basedir/bin/$i \
$priority \
$slave1 $slave2
done
update-alternatives \
--install /usr/bin/jexec jexec $basedir/lib/jexec $priority \
--slave \
/usr/share/binfmts/jar \
jexec-binfmt \
$basedir/lib/jar.binfmt
fi # update alternatives
# register binfmt; ignore errors, the alternative may already be
# registered by another JRE.
if which update-binfmts >/dev/null && [ -r /usr/share/binfmts/jar ]; then
update-binfmts --package openjdk-11 --import jar || true
fi
# activate class data sharing
case amd64 in i386|i586|sparc)
rm -f $basedir/lib/client/classes.jsa
log=$(tempfile)
if ! $basedir/bin/java -client -Xshare:dump -XX:PermSize=128m > $log; then
cat >&2 $log
rm -f $log
# this may fail on some machines/configurations, just ignore it.
echo >&2 "ignoring dump failure"
#exit 1
fi
rm -f $log
esac
case amd64 in amd64|i386|i586|sparc)
rm -f $basedir/lib/server/classes.jsa
log=$(tempfile)
if ! $basedir/bin/java -server -Xshare:dump > $log; then
cat >&2 $log
rm -f $log
# this may fail on some machines/configurations, just ignore it.
echo >&2 "ignoring dump failure"
#exit 1
fi
rm -f $log
esac
;;
esac
exit 0
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