#include <stdio.h>
#include <sys/vfs.h>

/* I use this to avoid fetching (and potentially bouncing) mail if my home
   directory is full. */

int main(int argc, char **argv) {
	struct statfs s;

	if (argc < 3) {
		fprintf(stderr, "usage: unlessfull device command ...\n");
		return 20;
	}
	if (statfs(argv[1], &s) < 0) {
		perror("statfs failed");
		return 20;
	}
	if (s.f_bavail < 1) {
		fprintf(stderr, "device full\n");
		return 0;
	}
	execvp(argv[2], &argv[2]);
	perror("execvp failed");
	return 20;
}