X-Git-Url: http://git.tuebingen.mpg.de/?p=adu.git;a=blobdiff_plain;f=string.c;h=8b6ea5a90e466f67064ad2ef9d755b6fd7ee783a;hp=a0666d35bde5d038bb0df48c954618f1041af16a;hb=9ca6c5e46bfbfeb6341a54703a21e25c15ef0f7e;hpb=f732616f8be8b2c8b4137108faa25eeaccb77499

diff --git a/string.c b/string.c
index a0666d3..8b6ea5a 100644
--- a/string.c
+++ b/string.c
@@ -166,3 +166,59 @@ __must_check int atoi64(const char *str, int64_t *result)
 	*result = tmp;
 	return 1;
 }
+
+static int check_uid_arg(const char *arg, uint32_t *uid)
+{
+	const uint32_t max = ~0U;
+	/*
+	 * we need an 64-bit int for string -> uid conversion because strtoll()
+	 * returns a signed value.
+	 */
+	int64_t val;
+	int ret = atoi64(arg, &val);
+
+	if (ret < 0)
+		return ret;
+	if (val < 0 || val > max)
+		return -ERRNO_TO_ERROR(EINVAL);
+	*uid = val;
+	return 1;
+}
+
+int parse_uid_range(const char *orig_arg, struct uid_range *ur)
+{
+	int ret;
+	char *arg = adu_strdup(orig_arg), *p = strchr(arg, '-');
+
+	if (!p || p == arg) { /* -42 or 42 */
+		ret = check_uid_arg(p? p + 1 : arg, &ur->high);
+		if (ret < 0)
+			goto out;
+		ur->low = p? 0 : ur->high;
+		ret = 1;
+		goto out;
+	}
+	/* 42- or 42-4711 */
+	*p = '\0';
+	p++;
+	ret = check_uid_arg(arg, &ur->low);
+	if (ret < 0)
+		goto out;
+	ur->high = ~0U;
+	if (*p) { /* 42-4711 */
+		ret = check_uid_arg(p, &ur->high);
+		if (ret < 0)
+			goto out;
+	}
+	if (ur->low > ur->high)
+		ret = -ERRNO_TO_ERROR(EINVAL);
+out:
+	if (ret < 0)
+		ERROR_LOG("bad uid option: %s\n", orig_arg);
+	else
+		INFO_LOG("admissible uid range: %u - %u\n", ur->low,
+			ur->high);
+	free(arg);
+	return ret;
+}
+