Function getenv_quad

freebsd/kern/kern_environment.c:900–939

* Return a quad_t value from an environment variable. */

 * Return a quad_t value from an environment variable.
 */
int
getenv_quad(const char *name, quad_t *data)
{
	const char	*value;
	char		suffix, *vtp;
	quad_t		iv;

	value = kenv_acquire(name);
	if (value == NULL) {
		goto error;
	}
	iv = strtoq(value, &vtp, 0);
	if (vtp == value || (vtp[0] != '\0' && vtp[1] != '\0')) {
		goto error;
	}
	suffix = vtp[0];
	kenv_release(value);
	switch (suffix) {
	case 't': case 'T':
		iv *= 1024;
		/* FALLTHROUGH */
	case 'g': case 'G':
		iv *= 1024;
		/* FALLTHROUGH */
	case 'm': case 'M':
		iv *= 1024;
		/* FALLTHROUGH */
	case 'k': case 'K':
		iv *= 1024;
	case '\0':
		break;
	default:
		return (0);
	}
	*data = iv;
	return (1);
error:
	kenv_release(value);
	return (0);
}

/*
 * Return a boolean value from an environment variable. This can be in