Although it does not solve the more general issue with calling intrinsics
from gcc, the easiest and most portable way of getting environment
variables is to use getenv():

#include <stdlib.h>

char Sys_Id_Code(void)
{
    char *sysname = getenv("HPSYSNAME");

    return sysname[0];
}

int main(int argc, char *argv[])
{
    printf("The system name starts with %c\n",Sys_Id_Code());
}


I don't have gcc on my system, but it works fine with the HP's c89
compiler, and it should work fine with gcc, too.

--
Gary W. Smith
[log in to unmask]


"Emerson, Tom # El Monte" <[log in to unmask]> wrote in message
news:8vcbbh014k3@enews4.newsguy.com...
> I'm encountering a strange problem calling the system intrinsic HPCIGETVAR
> from within a "C" program compiled with the gnu gcc compiler [2.95.2]  The
> program is aborting from within the SYSTEM code, not my user code, so it
> makes it difficult to debug "as a user"...
>
>[stuff omitted for brevity]
>
> /***** procedure to get system id from 'HPSYSNAME var ****/
> char Sys_Id_Code(void)
> {
>     int status=0;
>     /* broken down as:
>        short info;  (i.e., status >> 16)
>        short subsys; ( status & 0xff)
>     */
>     int strlen;
>     char _ret='Z';
>     char varvalu[32]="";
>     char varname[]="HPSYSNAME  ";
>
>     strlen = 32;
>
>     HPCIGETVAR(varname,&status,
>         10,&strlen,
>          2, varvalu,
>          0, 0);
>
>     if (status == 0)
>         _ret = varvalu[0];
>     return(_ret);
> }
> /*********  end of psysid ************/
>
> int main(int argc, char *argv[])
> {
>     printf("The system name starts with %c\n",Sys_Id_Code());
> }
>
> [error dump omitted]
>
> Tom Emerson
> Sr. Systems Analyst
> NDC | e COMMERCE
> [log in to unmask]
> 626-258-4309
> 626-350-3832 FAX
>