return fd;
}
-bool valid_user_group_name(const char *u) {
+bool valid_user_group_name_full(const char *u, bool strict) {
const char *i;
long sz;
/* Checks if the specified name is a valid user/group name. Also see POSIX IEEE Std 1003.1-2008, 2016 Edition,
* 3.437. We are a bit stricter here however. Specifically we deviate from POSIX rules:
*
- * - We don't allow any dots (this would break chown syntax which permits dots as user/group name separator)
* - We require that names fit into the appropriate utmp field
* - We don't allow empty user names
+ * - No dots or digits in the first character
+ *
+ * If strict==true, additionally:
+ * - We don't allow any dots (this conflicts with chown syntax which permits dots as user/group name separator)
*
* Note that other systems are even more restrictive, and don't permit underscores or uppercase characters.
*/
u[0] != '_')
return false;
- for (i = u+1; *i; i++) {
- if (!(*i >= 'a' && *i <= 'z') &&
- !(*i >= 'A' && *i <= 'Z') &&
- !(*i >= '0' && *i <= '9') &&
- !IN_SET(*i, '_', '-'))
+ for (i = u+1; *i; i++)
+ if (!((*i >= 'a' && *i <= 'z') ||
+ (*i >= 'A' && *i <= 'Z') ||
+ (*i >= '0' && *i <= '9') ||
+ IN_SET(*i, '_', '-') ||
+ (!strict && *i == '.')))
return false;
- }
sz = sysconf(_SC_LOGIN_NAME_MAX);
assert_se(sz > 0);
return true;
}
-bool valid_user_group_name_or_id(const char *u) {
+bool valid_user_group_name_or_id_full(const char *u, bool strict) {
- /* Similar as above, but is also fine with numeric UID/GID specifications, as long as they are in the right
- * range, and not the invalid user ids. */
+ /* Similar as above, but is also fine with numeric UID/GID specifications, as long as they are in the
+ * right range, and not the invalid user ids. */
if (isempty(u))
return false;
- if (valid_user_group_name(u))
+ if (valid_user_group_name_full(u, strict))
return true;
return parse_uid(u, NULL) >= 0;
assert_se(PTR_TO_UID(UID_TO_PTR(1000)) == 1000);
}
+static void test_valid_user_group_name_compat(void) {
+ log_info("/* %s */", __func__);
+
+ assert_se(!valid_user_group_name_compat(NULL));
+ assert_se(!valid_user_group_name_compat(""));
+ assert_se(!valid_user_group_name_compat("1"));
+ assert_se(!valid_user_group_name_compat("65535"));
+ assert_se(!valid_user_group_name_compat("-1"));
+ assert_se(!valid_user_group_name_compat("-kkk"));
+ assert_se(!valid_user_group_name_compat("rööt"));
+ assert_se(!valid_user_group_name_compat("."));
+ assert_se(!valid_user_group_name_compat(".eff"));
+ assert_se(!valid_user_group_name_compat("foo\nbar"));
+ assert_se(!valid_user_group_name_compat("0123456789012345678901234567890123456789"));
+ assert_se(!valid_user_group_name_or_id_compat("aaa:bbb"));
+ assert_se(!valid_user_group_name_compat("."));
+ assert_se(!valid_user_group_name_compat(".1"));
+ assert_se(!valid_user_group_name_compat(".65535"));
+ assert_se(!valid_user_group_name_compat(".-1"));
+ assert_se(!valid_user_group_name_compat(".-kkk"));
+ assert_se(!valid_user_group_name_compat(".rööt"));
+ assert_se(!valid_user_group_name_or_id_compat(".aaa:bbb"));
+
+ assert_se(valid_user_group_name_compat("root"));
+ assert_se(valid_user_group_name_compat("lennart"));
+ assert_se(valid_user_group_name_compat("LENNART"));
+ assert_se(valid_user_group_name_compat("_kkk"));
+ assert_se(valid_user_group_name_compat("kkk-"));
+ assert_se(valid_user_group_name_compat("kk-k"));
+ assert_se(valid_user_group_name_compat("eff.eff"));
+ assert_se(valid_user_group_name_compat("eff."));
+
+ assert_se(valid_user_group_name_compat("some5"));
+ assert_se(!valid_user_group_name_compat("5some"));
+ assert_se(valid_user_group_name_compat("INNER5NUMBER"));
+}
+
static void test_valid_user_group_name(void) {
log_info("/* %s */", __func__);
assert_se(!valid_user_group_name("-kkk"));
assert_se(!valid_user_group_name("rööt"));
assert_se(!valid_user_group_name("."));
- assert_se(!valid_user_group_name("eff.eff"));
+ assert_se(!valid_user_group_name(".eff"));
assert_se(!valid_user_group_name("foo\nbar"));
assert_se(!valid_user_group_name("0123456789012345678901234567890123456789"));
assert_se(!valid_user_group_name_or_id("aaa:bbb"));
+ assert_se(!valid_user_group_name("."));
+ assert_se(!valid_user_group_name(".1"));
+ assert_se(!valid_user_group_name(".65535"));
+ assert_se(!valid_user_group_name(".-1"));
+ assert_se(!valid_user_group_name(".-kkk"));
+ assert_se(!valid_user_group_name(".rööt"));
+ assert_se(!valid_user_group_name_or_id(".aaa:bbb"));
assert_se(valid_user_group_name("root"));
assert_se(valid_user_group_name("lennart"));
assert_se(valid_user_group_name("_kkk"));
assert_se(valid_user_group_name("kkk-"));
assert_se(valid_user_group_name("kk-k"));
+ assert_se(!valid_user_group_name("eff.eff"));
+ assert_se(!valid_user_group_name("eff."));
assert_se(valid_user_group_name("some5"));
assert_se(!valid_user_group_name("5some"));
assert_se(valid_user_group_name("INNER5NUMBER"));
}
+static void test_valid_user_group_name_or_id_compat(void) {
+ log_info("/* %s */", __func__);
+
+ assert_se(!valid_user_group_name_or_id_compat(NULL));
+ assert_se(!valid_user_group_name_or_id_compat(""));
+ assert_se(valid_user_group_name_or_id_compat("0"));
+ assert_se(valid_user_group_name_or_id_compat("1"));
+ assert_se(valid_user_group_name_or_id_compat("65534"));
+ assert_se(!valid_user_group_name_or_id_compat("65535"));
+ assert_se(valid_user_group_name_or_id_compat("65536"));
+ assert_se(!valid_user_group_name_or_id_compat("-1"));
+ assert_se(!valid_user_group_name_or_id_compat("-kkk"));
+ assert_se(!valid_user_group_name_or_id_compat("rööt"));
+ assert_se(!valid_user_group_name_or_id_compat("."));
+ assert_se(!valid_user_group_name_or_id_compat(".eff"));
+ assert_se(valid_user_group_name_or_id_compat("eff.eff"));
+ assert_se(valid_user_group_name_or_id_compat("eff."));
+ assert_se(!valid_user_group_name_or_id_compat("foo\nbar"));
+ assert_se(!valid_user_group_name_or_id_compat("0123456789012345678901234567890123456789"));
+ assert_se(!valid_user_group_name_or_id_compat("aaa:bbb"));
+
+ assert_se(valid_user_group_name_or_id_compat("root"));
+ assert_se(valid_user_group_name_or_id_compat("lennart"));
+ assert_se(valid_user_group_name_or_id_compat("LENNART"));
+ assert_se(valid_user_group_name_or_id_compat("_kkk"));
+ assert_se(valid_user_group_name_or_id_compat("kkk-"));
+ assert_se(valid_user_group_name_or_id_compat("kk-k"));
+
+ assert_se(valid_user_group_name_or_id_compat("some5"));
+ assert_se(!valid_user_group_name_or_id_compat("5some"));
+ assert_se(valid_user_group_name_or_id_compat("INNER5NUMBER"));
+}
+
static void test_valid_user_group_name_or_id(void) {
log_info("/* %s */", __func__);
assert_se(!valid_user_group_name_or_id("-kkk"));
assert_se(!valid_user_group_name_or_id("rööt"));
assert_se(!valid_user_group_name_or_id("."));
+ assert_se(!valid_user_group_name_or_id(".eff"));
assert_se(!valid_user_group_name_or_id("eff.eff"));
+ assert_se(!valid_user_group_name_or_id("eff."));
assert_se(!valid_user_group_name_or_id("foo\nbar"));
assert_se(!valid_user_group_name_or_id("0123456789012345678901234567890123456789"));
assert_se(!valid_user_group_name_or_id("aaa:bbb"));
test_parse_uid();
test_uid_ptr();
+ test_valid_user_group_name_compat();
test_valid_user_group_name();
+ test_valid_user_group_name_or_id_compat();
test_valid_user_group_name_or_id();
test_valid_gecos();
test_valid_home();