Help with C clearenv and setenv

[Marco Atzeri]

On 5/30/2018 4:48 PM, Sam Habiel wrote:
> I have code for a database I am porting to Cygwin.
> 
> Part of that code is a clearenv() then a couple of setenvs. There is
> an ifdef for Cygwin, as it doesn't implement clearenv. It just sets
> environ = NULL. Well--that really breaks setenv! It returns a "Bad
> Poniter" error (-1).
> 
> What is the correct way to clear environment variables in Cygwin?
> 
> --Sam


not tested but it seems Cygwin is not the only platform
with problem on environ = NULL

environ = calloc(1, sizeof(*environ))

see
https://github.com/samba-team/samba/blob/master/source3/client/smbspool_krb5_wrapper.c

https://github.com/dovecot/core/blob/master/src/lib/env-util.c


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