vty: add "shutdown"

Kill programs with SIGTERM with the new vty command, as it would happen
with "systemctl stop".

I've considered running the select shutdown logic too in order to ensure
that pending OSMO_FD_WRITE requests are serviced. But as noted in
review, it's better to ensure that the regular SIGTERM code path works
as expected and call that instead of introducing an alternative code
path.

Closes: OS#4609
Change-Id: I3596a35b0f4a24e49484ec3f24a98e4d4f583e1e

1 files changed, 16 insertions, 0 deletions

diff --git a/src/vty/command.c b/src/vty/command.c
index 5001d06e..3112fee4 100644
--- a/src/vty/command.c
+++ b/src/vty/command.c
@@ -38,13 +38,16 @@ Boston, MA  02110-1301, USA. */
 #include <ctype.h>
 #include <time.h>
 #include <limits.h>
+#include <signal.h>
 #include <sys/time.h>
 #include <sys/stat.h>
+#include <sys/types.h>
 
 #include <osmocom/vty/vector.h>
 #include <osmocom/vty/vty.h>
 #include <osmocom/vty/command.h>
 
+#include <osmocom/core/logging.h>
 #include <osmocom/core/talloc.h>
 #include <osmocom/core/timer.h>
 #include <osmocom/core/utils.h>
@@ -3022,6 +3025,18 @@ gDEFUN(config_exit,
 	return CMD_SUCCESS;
 }
 
+DEFUN(shutdown,
+      shutdown_cmd, "shutdown", "Request a shutdown of the program\n")
+{
+	LOGP(DLGLOBAL, LOGL_INFO, "Shutdown requested from telnet\n");
+	vty_out(vty, "%s is shutting down. Bye!%s", host.app_info->name, VTY_NEWLINE);
+
+	/* Same exit path as if it was killed by the service manager */
+	kill(getpid(), SIGTERM);
+
+	return CMD_SUCCESS;
+}
+
 /* Show version. */
 DEFUN(show_version,
       show_version_cmd, "show version", SHOW_STR "Displays program version\n")
@@ -4394,6 +4409,7 @@ void cmd_init(int terminal)
 		install_lib_element(ENABLE_NODE, &config_disable_cmd);
 		install_lib_element(ENABLE_NODE, &config_terminal_cmd);
 		install_lib_element(ENABLE_NODE, &copy_runningconfig_startupconfig_cmd);
+		install_lib_element(ENABLE_NODE, &shutdown_cmd);
 	}
 	install_lib_element(ENABLE_NODE, &show_startup_config_cmd);
 	install_lib_element(ENABLE_NODE, &show_version_cmd);