1 files changed, 45 insertions, 0 deletions
diff --git a/recipes-connectivity/ppp/files/wait_for_reset b/recipes-connectivity/ppp/files/wait_for_reset
new file mode 100755
index 0000000..7e9da95
--- /dev/null
+++ b/recipes-connectivity/ppp/files/wait_for_reset
@@ -0,0 +1,45 @@
+#!/bin/bash
+
+# For ppp to work, stty must work on file descriptor 0.
+# If stty fails, so will ppp.
+
+NAME=wait_for_reset
+
+: ${LOG:="/usr/bin/logger -t ${NAME} -p daemon.notice"}
+
+USR2=12
+TERM=15
+# Child used to set our PID in the radio-reset-monitor
+function sleep_reset
+{
+    # Wait for parent to enter wait.
+    trap "kill $!;kill $BASHPID" $TERM
+    while [[ $(ps -h -o wchan -p $PPID) != do_wait ]] ; do usleep 100 ; done
+    ${LOG} Register for SIGUSR2 when radio-reset complete
+    echo "$$" "$USR2" >/sys/devices/platform/mts-io/radio-reset-monitor
+    discovered=$(cat /sys/devices/platform/mts-io/radio-udev-discovery)
+    if ((discovered == 1)) ; then
+       # reset is not in progress.
+       exit 0
+    fi
+    sleep 4294967295  # Hopefully forever
+    exit 0
+}
+
+# Wait for radio-reset to complete
+function wait_for_reset
+{
+	# Wait for radio reset/modem discovery
+	trap ":" $USR2
+	in_reset=$(cat /sys/devices/platform/mts-io/radio-udev-discovery)
+	if ((in_reset == 0)) ; then
+		sleep_reset &
+		wait $!
+		# pgrep is needed to find the sleep process
+                echo "pgrep -P: $(pgrep -P $!)"
+		pgrep -P $! | xargs kill
+                ${LOG} "radio-reset is complete"
+                
+	fi
+	trap "" $USR2
+}