postinst is in gdb-source 8.1-0ubuntu3.
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 | #!/bin/sh
set -e
# Replace documentation directory with symlink
if [ -d /usr/share/doc/gdb-source ] && [ ! -L /usr/share/doc/gdb-source ]; then
if rmdir /usr/share/doc/gdb-source 2>/dev/null; then
ln -sf gdb /usr/share/doc/gdb-source
fi
fi
exit 0
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