Re: using explicit_bzero - Mailing list pgsql-hackers

From Tom Lane
Subject Re: using explicit_bzero
Date
Msg-id 25152.1563403539@sss.pgh.pa.us
Whole thread Raw
In response to Re: using explicit_bzero  (Alvaro Herrera <alvherre@2ndquadrant.com>)
Responses Re: using explicit_bzero  (Peter Eisentraut <peter.eisentraut@2ndquadrant.com>)
List pgsql-hackers
Alvaro Herrera <alvherre@2ndquadrant.com> writes:
> On 2019-Jul-11, Thomas Munro wrote:
>> Following a trail of crumbs beginning at OpenSSH's fallback
>> implementation of this[1], I learned that C11 has standardised
>> memset_s[2] for this purpose.  Macs have memset_s but no
>> explicit_bzero.  FreeBSD has both.  I wonder if it'd be better to make
>> memset_s the function we use in our code, considering its standard
>> blessing and therefore likelihood of being available on every system
>> eventually.

> Sounds like a future-proof way would be to implement memset_s in
> src/port if absent from the OS (using explicit_bzero and other tricks),
> and use that.

+1 for using the C11-standard name, even if that's not anywhere
in the real world yet.

            regards, tom lane



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