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**ALERT**ALERT* Whats app requesting users to upgrade to latest version as; its vulnerability found.
05-16-2019
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relup(5) Files relup(5) NAME
relup - Release upgrade file DESCRIPTION
The release upgrade file describes how a release is upgraded in a running system. This file is automatically generated by systools:make_relup/3,4 , using a release resource file ( .rel ), application resource files ( .app ) and application upgrade files ( .appup ) as input. FILE SYNTAX
In a target system, the release upgrade file should be located in the OTP_ROOT/erts-EVsn/Vsn directory. The relup file contains one single Erlang term, which defines the instructions used to upgrade the release. The file has the following syn- tax: {Vsn, [{UpFromVsn, Descr, Instructions}, ...], [{DownToVsn, Descr, Instructions}, ...]}. * Vsn = string() is the current version of the release. * UpFromVsn = string() is an earlier version of the release to upgrade from. * Descr = term() is a user defined parameter passed from the systools:make_relup/3,4 function. It will be used in the return value of release_handler:install_release/1,2 . * Instructions is a list of low-level release upgrade instructions, see appup(5) . It consists of the release upgrade instructions from the respective application upgrade files (high-level instructions are translated to low-level instructions), in the same order as in the start script. * DownToVsn = string() is an earlier version of the release to downgrade to. When upgrading from UpFromVsn with release_handler:install_release/1,2 , there does not have to be an exact match of versions, but UpFromVsn can be a sub-string of the current release version. SEE ALSO
app(5), appup(5), rel(5), release_handler(3erl), systools(3erl) Ericsson AB sasl 2.1.9.3 relup(5)
