On Mon, 10 May 2021, Michael Kerrisk (man-pages) via Libc-alpha wrote: > Hello, > > On Fri, 7 May 2021 at 02:21, Dave Chupreev <cdn.dev@xxxxxxxxx> wrote: > > > > Well I see, I've tried on Linux and yea I didn't find any option to insert multiple definitions. > > I think the only way to insert multiple definitions is by direct > manipulation of 'extern char **environ'. You can cause a program to start with multiple definitions, because it is possible to pass arbitrarily funny stuff as 'envp' argument to execve, such as: - duplicated entries - entries without a '=' - entries starting with '=' - empty strings - "2 x 2 = 4" All of that will be present in the exec'd program's environment array. Alexander
