Thanks for the reply Aleksander. The calls are made before I start the main
loop. I used the synchronous code path from mmcli as an example, along with the
main loop call from the sms-c-sync.c. Below is my demo code and program output.
#define _GNU_SOURCE
#include <stdlib.h>
#define G_LOG_USE_STRUCTURED
#include <libmm-glib.h>
static gboolean
loop_is_idle(GMainLoop *loop)
{
g_print("exiting main loop\n");
g_main_loop_quit(loop);
return G_SOURCE_REMOVE;
}
static void dump_modem_info(gpointer obj, gpointer unused)
{
/* get the modem interface */
MMObject *modem = (MMObject *)obj;
MMModem *modem_if = mm_object_peek_modem(modem);
if (!modem_if)
{
g_printerr("error: modem-interface not found");
return;
}
const gchar *sim_path = mm_modem_get_sim_path(modem_if);
g_print("Primary SIM path: %s\n", sim_path ? sim_path : "empty");
const gchar * const * sim_paths = mm_modem_get_sim_slot_paths(modem_if);
g_print("SIM Paths:\n");
gint i;
for (i = 0; sim_paths[i]; ++i)
g_print(" [%d] %s\n", i, sim_paths[i]);
if (i == 0)
g_print(" No SIM paths found\n");
g_print("Primary SIM slot: %u\n", mm_modem_get_primary_sim_slot(modem_if));
g_autoptr(GError) error = NULL;
g_autoptr(GPtrArray) sims = mm_modem_list_sim_slots_sync(modem_if, NULL,
&error);
if (error)
{
g_printerr("error: couldn't get SIM list: %s\n", error->message);
g_clear_error(&error);
}
g_print("SIMS array has %u elements\n", sims->len);
}
static void
list_current_modems(MMManager *mm_mgr)
{
GList *modems =
g_dbus_object_manager_get_objects(G_DBUS_OBJECT_MANAGER(mm_mgr));
g_list_foreach(modems, dump_modem_info, NULL);
g_list_free_full(modems, g_object_unref);
}
gint
main(gint argc, gchar **argv)
{
g_autoptr(GError) error = NULL;
g_autoptr(GDBusConnection) dbus_conn = g_bus_get_sync(G_BUS_TYPE_SYSTEM,
NULL, &error);
if (!dbus_conn)
{
g_printerr("error: couldn't connect to D-Bus: %s\n",
error ? error->message : "unknown");
exit(EXIT_FAILURE);
}
g_autoptr(MMManager) mm_mgr = mm_manager_new_sync(dbus_conn,
G_DBUS_OBJECT_MANAGER_CLIENT_FLAGS_DO_NOT_AUTO_START,
NULL,
&error);
if (!mm_mgr)
{
g_printerr("error: couldn't manager: %s\n",
error ? error->message : "unknown");
exit(EXIT_FAILURE);
}
list_current_modems(mm_mgr);
/* Run the main loop to clean up any lingering async tasks */
{
g_autoptr(GMainLoop) loop = g_main_loop_new(NULL, FALSE);
g_idle_add((GSourceFunc)loop_is_idle, loop);
g_main_loop_run(loop);
}
return EXIT_SUCCESS;
}
Primary SIM path: /org/freedesktop/ModemManager1/SIM/0
SIM Paths:
No SIM paths found
Primary SIM slot: 0
SIMS array has 0 elements
exiting main loop
From: Aleksander Morgado <aleksan...@aleksander.es>
Sent: Tuesday, November 16, 2021 12:16 AM
To: Bushman, Jeff <jbush...@ciena.com>
Cc: modemmanager-devel@lists.freedesktop.org
Subject: [**EXTERNAL**] Re: No SIM Slot Paths
Hey,
On Tue, Nov 16, 2021 at 12:08 AM Bushman, Jeff
<jbush...@ciena.com<mailto:jbush...@ciena.com>> wrote:
I’m just getting started with interfacing with the ModemManager via mm-glib. I
am experimenting with the synchronous SIM slot APIs, and they don’t seem to
work.
I am running ModemManager 1.18.2 on Ubuntu 20.04 with a Sierra Wireless
MC7455-based USB modem running in MBIM mode and an AT&T SIM.
If I call mm_modem_get_sim_path() I do get the primary (only) SIM path back.
If I call mm_modem_get_sim_slot_paths(), I get an empty array back (the first
element is NULL).
If I call mm_modem_get_primary_sim_slot(), I get an answer of 0, although the
documentation implies the answer should be [1..N]
If I call mm_modem_list_sim_slots_sync(), I get an empty (len = 0) array back
with no error message.
Should I expect these APIs to work? I’m very new to glib and D-Bus programming,
so debugging tips are very welcome.
Are you running a GLib main loop in some way when using the sync APIs? Maybe
these properties are not getting properly populated due to the lack of main
loop. An example snippet of what you're doing would help.
--
Aleksander
https://aleksander.es
[aleksander.es]<https://urldefense.com/v3/__https:/aleksander.es__;!!OSsGDw!ckmQxfB3rnRMfXfZpbMUj00O-0rX0wz8qAVZm9buCMT-GPtp-orsXrkp_SDOGQ$>
