Can't set system env variable using C...

[mateusz_s]

Hi,
I am using Bebbo 6.0.5 C compliler.
Can I set system global ENV variable somehow?

I tried:
1. Using SetEnv() but there is no such a function here...
There is only setenv() functino that take only 3 parameters not 4
but it also not working.

setenv("variable", "value", 1);

2. So I tried to use a system call:

system("set variable value");

Nothing happens.


3. So I use also

 Execute("set variable value")

but also nothing.

4. I also foound this piece of code - not working either:

int setenv(const char *var, const char *value, int overwrite)
{
    struct Process *me = (void *) FindTask(NULL);
    void *old_window = me->pr_WindowPtr;
    int ret = -1;

    me->pr_WindowPtr = (void *) -1;   /* suppress any "Please insert" popups */
    if (SysBase->LibNode.lib_Version >= ReqVers)
        ret = !SetVar((char *)var, (char *)value, -1, GVF_GLOBAL_ONLY | LV_VAR);
    else {
        BPTR hand, foot, spine;
        long len = value ? strlen(value) : 0;
        if (foot = Lock("ENV:", ACCESS_READ)) {
            spine = CurrentDir(foot);
            if (len) {
                if (hand = Open((char *) var, MODE_NEWFILE)) {
                    ret = Write(hand, (char *) value, len + 1) >= len;
                    Close(hand);
                }
            } else
                ret = DeleteFile((char *) var);
            UnLock(CurrentDir(spine));
        }
    }
    me->pr_WindowPtr = old_window;
    return ret;
}

from https://opensource.apple.com/source/...te.c.auto.html
but also not working.

---


EDIT: ---
OK, I used:

system("setenv variable value");

and now it created it..

[jotd]

can you check with Snoopdos to see what the various programs are doing?


IIRC SetEnv & GetEnv need OS 2.x.

[mateusz_s]

Originally Posted by jotd

can you check with Snoopdos to see what the various programs are doing?


IIRC SetEnv & GetEnv need OS 2.x.

I tried

system("setenv value variable");

instead of

system("set value variable");

and it worked - it has been saved in env:

[alkis]

If you are in kickstart >=2, check this
http://amigadev.elowar.com/read/ADCD.../node01BF.html

sample program

#include <proto/dos.h>

int main(int argc, char **argv) {
  SetVar("testing", "42", -1, GVF_GLOBAL_ONLY);
  return 0;
}

[mateusz_s]

Originally Posted by alkis

If you are in kickstart >=2, check this
http://amigadev.elowar.com/read/ADCD.../node01BF.html

sample program

#include <proto/dos.h>

int main(int argc, char **argv) {
  SetVar("testing", "42", -1, GVF_GLOBAL_ONLY);
  return 0;
}

Yes this should work i tried it - but for some reason
I cant find this function in my Bebbo 6.5.0 C compiler
Instead of SetVar() that takes 4 parameters there is setvar() that takes 3 parametry- but it dont work. I maybe
Try ask Bebbo about it.

[alkis]

Originally Posted by mateusz_s

Yes this should work i tried it - but for some reason
I cant find this function in my Bebbo 6.5.0 C compiler
Instead of SetVar() that takes 4 parameters there is setvar() that takes 3 parametry- but it dont work. I maybe
Try ask Bebbo about it.

What do you mean you can't find this function? Do you get an error from the compiler?

Umm, this is how I compiled it with bebbo's gcc 6.5.0

m68k-amigaos-gcc -O3 -noixemul -o gvar gvar.c

[mateusz_s]

Originally Posted by alkis

What do you mean you can't find this function? Do you get an error from the compiler?

Umm, this is how I compiled it with bebbo's gcc 6.5.0

m68k-amigaos-gcc -O3 -noixemul -o gvar gvar.c

Hmm.. thats weird. In my case only setvar() tak takes 3 argument is avaiable. The SetVar() isn't. I must check it again.. maybe i missed something.

[alkis]

do you get any error from the compiler when you try to compile the sample I posted above?

[mateusz_s]

Originally Posted by alkis

do you get any error from the compiler when you try to compile the sample I posted above?

Cant check it right now. I will Try a bit later and let know.

[mateusz_s]

Originally Posted by alkis

do you get any error from the compiler when you try to compile the sample I posted above?

Yes - its working now.. I dont know what happend -
before my editor (VisualCode) coulnd't find this function -
now its OK - and the compliator/linker finds it too -
and its works in the System.

Thanks For Help