DOS ain't dead

How to set env. var from C program (Developers)

posted by j_hoff, 15.01.2013, 23:57

> Hm, that I feared about - you mean there's no standard C function to do
> this. As I try to keep portability over dos/win/linux I don't want
> implement any dirty hack like direct rewriting memory.

Without a "dirty hack" you wont be able to do it. But if you don't fear "undocumented features" then it can be done!

> Hm, it seems I have to use such batch files because it seems that I cannon feed SET with redirector <
> SET VAR=<program.exe
> doesn't work, it has to be file. And under dos I can use only real file on disk...

That's true and that's exactly why the utility PIPESET exists. Get the DOSUTILS package e.g. from here: http://www.bttr-software.de/products/jhoffmann/ and see whether it does what you need. You could do it with such a command line:

program.exe | PIPESET VAR

Or look into the sources, which are also included in the package, to see how it can be done in C.

Complete thread:

• How to set env. var from C program - RayeR, 15.01.2013, 04:34 (Developers)
  • How to set env. var from C program - Laaca, 15.01.2013, 07:41
    • How to set env. var from C program - RayeR, 15.01.2013, 10:31
      • How to set env. var from C program - tom, 15.01.2013, 13:54
        • How to set env. var from C program - RayeR, 15.01.2013, 14:07
          • How to set env. var from C program - tom, 15.01.2013, 15:41
          • How to set env. var from C program - marcov, 16.01.2013, 15:19
            • How to set env. var from C program - RayeR, 16.01.2013, 23:33
        • How to set env. var from C program - RayeR, 15.01.2013, 16:24
        • How to set env. var from C program - bocke, 18.01.2013, 16:57
      • How to set env. var from C program - bretjohn, 15.01.2013, 17:30
        • How to set env. var from C program - RayeR, 15.01.2013, 23:51
          • How to set env. var from C program - bretjohn, 16.01.2013, 01:05
            • How to set env. var from C program - RayeR, 16.01.2013, 03:20
              • How to set env. var from C program - bretjohn, 16.01.2013, 17:08
      • How to set env. var from C program - j_hoff, 15.01.2013, 23:57
        • How to set env. var from C program - RayeR, 16.01.2013, 00:49
          • How to set env. var from C program - roytam, 16.01.2013, 04:57
        • How to set env. var from C program - roytam, 16.01.2013, 05:13
          • How to set env. var from C program - j_hoff, 16.01.2013, 08:11
  • How to set env. var from C program - georgpotthast, 15.01.2013, 22:20
    • How to set env. var from C program - RayeR, 15.01.2013, 23:48