Refactor handling of valid account names

* Move our system_names and system_groups out to a util header.

* Qt UI: Validate that the user's chosen account name is not contained
  in either system_names nor system_groups.

Closes: #388
Acked-by: Síle Ekaterin Liszka <sheila@vulpine.house>

1 files changed, 36 insertions, 0 deletions

diff --git a/util/user.hh b/util/user.hh
new file mode 100644
index 0000000..dea2ff2
--- /dev/null
+++ b/util/user.hh
@@ -0,0 +1,36 @@
+/*
+ * user.hh - User account constant definitions
+ * util, the utility library for
+ * Project Horizon
+ *
+ * Copyright (c) 2024 Adélie Linux and contributors.  All rights reserved.
+ * This code is licensed under the AGPL 3.0 license, as noted in the
+ * LICENSE-code file in the root directory of this repository.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+#ifndef HORIZON_USER_HH_
+#define HORIZON_USER_HH_
+
+#include <set>
+#include <string>
+
+const static std::set<std::string> system_names = {
+        "root", "bin", "daemon", "adm", "lp", "sync", "shutdown", "halt", "mail",
+        "news", "uucp", "operator", "man", "postmaster", "cron", "ftp", "sshd",
+        "at", "squid", "xfs", "games", "postgres", "cyrus", "vpopmail", "utmp",
+        "catchlog", "alias", "qmaild", "qmailp", "qmailq", "qmailr", "qmails",
+        "qmaill", "ntp", "smmsp", "guest", "nobody"
+};
+
+const static std::set<std::string> system_groups = {
+        "root", "bin", "daemon", "sys", "adm", "tty", "disk", "lp", "mem", "kmem",
+        "wheel", "floppy", "mail", "news", "uucp", "man", "cron", "console",
+        "audio", "cdrom", "dialout", "ftp", "sshd", "input", "at", "tape", "video",
+        "netdev", "readproc", "squid", "xfs", "kvm", "games", "shadow", "postgres",
+        "cdrw", "usb", "vpopmail", "users", "catchlog", "ntp", "nofiles", "qmail",
+        "qmaill", "smmsp", "locate", "abuild", "utmp", "ping", "nogroup", "nobody"
+};
+
+#endif /* !HORIZON_USER_HH_ */