nm-online: allow configuring timeout via NM_ONLINE_TIMEOUT environment

https://bugzilla.redhat.com/show_bug.cgi?id=1828458

https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/484
(cherry picked from commit e468b48ab7)

Makefile.am

@@ -4285,9 +4285,12 @@ clients_nm_online_LDFLAGS = \
 	-Wl,--version-script="$(srcdir)/linker-script-binary.ver"
 
 clients_nm_online_LDADD = \
-	shared/nm-libnm-aux/libnm-libnm-aux.la \
 	libnm/libnm.la \
-	$(GLIB_LIBS)
+	shared/nm-libnm-aux/libnm-libnm-aux.la \
+	shared/nm-glib-aux/libnm-glib-aux.la \
+	shared/nm-std-aux/libnm-std-aux.la \
+	$(GLIB_LIBS) \
+	$(NULL)
 
 $(clients_nm_online_OBJECTS): $(libnm_core_lib_h_pub_mkenums)
 $(clients_nm_online_OBJECTS): $(libnm_lib_h_pub_mkenums)

clients/nm-online.c

@@ -233,7 +233,7 @@ main (int argc, char *argv[])
 	OnlineData data = {
 		.retval = EXIT_FAILURE_UNSPECIFIED,
 	};
-	int t_secs = 30;
+	int t_secs;
 	GOptionContext *opt_ctx = NULL;
 	gboolean success;
 	GOptionEntry options[] = {
@@ -251,6 +251,8 @@ main (int argc, char *argv[])
 	bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
 	textdomain (GETTEXT_PACKAGE);
 
+	t_secs = _nm_utils_ascii_str_to_int64 (g_getenv ("NM_ONLINE_TIMEOUT"), 10, 0, G_MAXINT, 30);
+
 	data.start_timestamp_ms = _now_ms ();
 
 	opt_ctx = g_option_context_new (NULL);

data/NetworkManager-wait-online.service.in

@@ -6,9 +6,27 @@ After=NetworkManager.service
 Before=network-online.target
 
 [Service]
+# `nm-online -s` waits until the point when NetworkManager logs
+# "startup complete". That is when startup actions are settled and
+# devices and profiles reached a conclusive activated or deactivated
+# state. It depends on which profiles are configured to autoconnect and
+# also depends on profile settings like ipv4.may-fail/ipv6.may-fail,
+# which affect when a profile is considered fully activated.
+# Check NetworkManager logs to find out why wait-online takes a certain
+# time.
+
 Type=oneshot
-ExecStart=@bindir@/nm-online -s -q --timeout=30
+ExecStart=@bindir@/nm-online -s -q
 RemainAfterExit=yes
 
+# Set $NM_ONLINE_TIMEOUT variable for timeout in seconds.
+# Edit with `systemctl edit NetworkManager-wait-online`.
+#
+# Note, this timeout should commonly not be reached. If your boot
+# gets delayed too long, then the solution is usually not to decrease
+# the timeout, but to fix your setup so that the connected state
+# gets reached earlier.
+Environment=NM_ONLINE_TIMEOUT=30
+
 [Install]
 WantedBy=network-online.target

man/nm-online.xml

@@ -145,7 +145,8 @@
 
         <listitem>
           <para>Time to wait for a connection, in seconds. If the option is not provided,
-          the default timeout is 30 seconds.</para>
+          the environment variable <literal>NM_ONLINE_TIMEOUT</literal> is honored.
+          The default timeout is 30 seconds.</para>
         </listitem>
       </varlistentry>
 

po/POTFILES.skip

@@ -1,5 +1,6 @@
 clients/cloud-setup/nm-cloud-setup.service.in
 contrib/fedora/rpm/
+data/NetworkManager-wait-online.service.in
 data/NetworkManager.service.in
 data/org.freedesktop.NetworkManager.policy.in
 examples/python/NetworkManager.py