Taken from OpenEmbedded.

Wait for the AT Interpreter Ready message.
---
 gsmd.c |   11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

Index: gsm/src/gsmd/gsmd.c
===================================================================
--- gsm.orig/src/gsmd/gsmd.c	2007-08-15 00:34:48.000000000 +0800
+++ gsm/src/gsmd/gsmd.c	2007-08-15 00:35:13.000000000 +0800
@@ -317,6 +317,7 @@
 	{ "leak-report", 0, NULL, 'L' },
 	{ "vendor", 1, NULL, 'v' },
 	{ "machine", 1, NULL, 'm' },
+	{ "wait", 1, NULL, 'w' },
 	{ 0, 0, 0, 0 }
 };
 
@@ -344,6 +345,7 @@
 	       "\t-l file\t--logfile file\tSpecify a logfile to log to\n"
 	       "\t-v\t--vendor v\tSpecify GSM modem vendor plugin\n"
 	       "\t-m\t--machine m\tSpecify GSM modem machine plugin\n"
+	       "\t-w\t--wait m\tWait for the AT Interpreter Ready message\n"
 	       );
 }
 
@@ -373,6 +375,7 @@
 	char *logfile = "syslog";
 	char *vendor_name = NULL;
 	char *machine_name = NULL;
+	int wait = -1;
 
 	signal(SIGTERM, sig_handler);
 	signal(SIGINT, sig_handler);
@@ -385,7 +388,7 @@
 	print_header();
 
 	/*FIXME: parse commandline, set daemonize, device, ... */
-	while ((argch = getopt_long(argc, argv, "FVLdhp:s:l:v:m:", opts, NULL)) != -1) {
+	while ((argch = getopt_long(argc, argv, "FVLdhp:s:l:v:m:w:", opts, NULL)) != -1) {
 		switch (argch) {
 		case 'V':
       print_version();
@@ -423,6 +426,9 @@
 		case 'm':
 			machine_name = optarg;
 			break;
+		case 'w':
+			wait = atoi(optarg);
+			break;
 		}
 	}
 
@@ -467,6 +473,9 @@
 		exit(1);
 	}
 
+	if (wait >= 0)
+		g.interpreter_ready = !wait;
+
 	if (atcmd_init(&g, fd) < 0) {
 		fprintf(stderr, "can't initialize UART device\n");
 		exit(1);