libsubid/api.c: make Prog not static

[hallyn]

Closes #465

It'll be used by libmisc/ etc.

Signed-off-by: Serge Hallyn [email protected]

[hallyn]

With this:

ubuntu@shadow:~/shadow$ cat test.c
#include <shadow/subid.h>
#include <stdlib.h>

int main() {
        struct subid_range *ranges = NULL;
        subid_init("test", NULL);
        int i, n;
#if SUBID_ABI_MAJOR >= 4
        n = subid_get_uid_ranges("root", &ranges);
#else
        n = get_subuid_ranges("root", &ranges);
#endif
        for (i = 0; i < n; i++)
                printf("%d: %ld - %ld\n", i, ranges[i].start, ranges[i].count);

        free(ranges);
        return 0;
}
ubuntu@shadow:~/shadow$ gcc -o test test.c -lsubid
ubuntu@shadow:~/shadow$ ./test
0: 200000 - 65536

(I really need to get the CI tests working again)

[ikerexxe]

The changes in api.c look good to me, but I'm worried about the configuration changes.

[ikerexxe]

LGTM. Thanks!

[rbalint]

@hallyn please finish the fix for #444 instead. This is still ugly and the proper fix will need an ABI bump again. :-(

[hallyn]

@hallyn please finish the fix for #444 instead. This is still ugly and the proper fix will need an ABI bump again. :-(

I thought that was already merged! ok let me finish that first and see where that gets us.

Then I may do another release, and hopefully set this aside for awhile so I can focus a on the rust impl.