[Lazarus] SetEnv on Linux 64bit

[Honza]

2012/4/4  <michael.vancanneyt at wisa.be>:
> Not the current.
>
> The EXTERNAL variable environ, i.e. the one that the kernel passed on,
> which cannot be modified. You can only modify your local copy.

14:00 myname at tux64:~/tmp/c$ ls
a.c  b.c
14:00 myname at tux64:~/tmp/c$ cat a.c
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>

main() {
	char *e = getenv("MYVAR");
	printf("a1: %s\n", e);
	setenv("MYVAR", "MYVALUE", 1);
	e = getenv("MYVAR");
	printf("a2: %s\n", e);
	execv("./b.out", NULL);
}
14:00 myname at tux64:~/tmp/c$ cat b.c
#include <stdlib.h>
#include <stdio.h>

main() {
	char *e = getenv("MYVAR");
	printf("b: %s\n", e);
}

14:00 myname at tux64:~/tmp/c$ gcc -o a.out a.c && gcc -o b.out b.c && ls
a.c  a.out  b.c  b.out
14:00 myname at tux64:~/tmp/c$ ./a.out
a1: (null)
a2: MYVALUE
b: MYVALUE
14:00 myname at tux64:~/tmp/c$

-- jan