Removed variable length arrays, added -Wvla compiler option.vla-removal

5 files changed, 13 insertions, 16 deletions

diff --git a/SConstruct b/SConstruct
index b38aca0e..d86444ec 100644
--- a/SConstruct
+++ b/SConstruct
@@ -977,7 +977,7 @@ else:
     for option in ('-Wextra', '-Wall', '-Wno-uninitialized',
                    '-Wno-missing-field-initializers',
                    '-Wcast-align', '-Wmissing-declarations',
-                   '-Wmissing-prototypes',
+                   '-Wmissing-prototypes', "-Wvla",
                    '-Wstrict-prototypes', '-Wpointer-arith', '-Wreturn-type'):
         if option not in config.env['CFLAGS']:
             config.CheckCompilerOption(option)
diff --git a/driver_nmea2000.c b/driver_nmea2000.c
index eb7b7d75..bab5c52c 100644
--- a/driver_nmea2000.c
+++ b/driver_nmea2000.c
@@ -1539,7 +1539,7 @@ static gps_mask_t nmea2000_parse_input(struct gps_device_t *session)
 
 int nmea2000_open(struct gps_device_t *session)
 {
-    char interface_name[strlen(session->gpsdata.dev.path)+1];
+    char interface_name[GPS_PATH_MAX];
     socket_t sock;
     int status;
     int unit_number;
diff --git a/gpsmon.c b/gpsmon.c
index ae456209..ed1e33b6 100644
--- a/gpsmon.c
+++ b/gpsmon.c
@@ -314,7 +314,7 @@ void monitor_fixframe(WINDOW * win)
 static void packet_dump(const char *buf, size_t buflen)
 {
     if (packetwin != NULL) {
-	char buf2[buflen * 2];
+	char buf2[MAX_PACKET_LENGTH * 2];
 	cond_hexdump(buf2, buflen * 2, buf, buflen);
 	(void)waddstr(packetwin, buf2);
 	(void)waddch(packetwin, (chtype)'\n');
diff --git a/libgpsd_core.c b/libgpsd_core.c
index b2ed639b..a752f10f 100644
--- a/libgpsd_core.c
+++ b/libgpsd_core.c
@@ -464,7 +464,7 @@ int gpsd_open(struct gps_device_t *session)
 	return session->gpsdata.gps_fd;
     /* otherwise, could be an TCP data feed */
     } else if (str_starts_with(session->gpsdata.dev.path, "tcp://")) {
-	char server[strlen(session->gpsdata.dev.path)+1], *port;
+	char server[GPS_PATH_MAX], *port;
 	socket_t dsock;
 	(void)strlcpy(server, session->gpsdata.dev.path + 6, sizeof(server));
 	INVALIDATE_SOCKET(session->gpsdata.gps_fd);
@@ -491,7 +491,7 @@ int gpsd_open(struct gps_device_t *session)
 	return session->gpsdata.gps_fd;
     /* or could be UDP */
     } else if (str_starts_with(session->gpsdata.dev.path, "udp://")) {
-	char server[strlen(session->gpsdata.dev.path)+1], *port;
+	char server[GPS_PATH_MAX], *port;
 	socket_t dsock;
 	(void)strlcpy(server, session->gpsdata.dev.path + 6, sizeof(server));
 	INVALIDATE_SOCKET(session->gpsdata.gps_fd);
@@ -520,7 +520,7 @@ int gpsd_open(struct gps_device_t *session)
 #endif /* NETFEED_ENABLE */
 #ifdef PASSTHROUGH_ENABLE
     if (str_starts_with(session->gpsdata.dev.path, "gpsd://")) {
-	char server[strlen(session->gpsdata.dev.path)+1], *port;
+	char server[GPS_PATH_MAX], *port;
 	socket_t dsock;
 	(void)strlcpy(server, session->gpsdata.dev.path + 7, sizeof(server));
 	INVALIDATE_SOCKET(session->gpsdata.gps_fd);
diff --git a/net_ntrip.c b/net_ntrip.c
index 72f718e4..b10f34bb 100644
--- a/net_ntrip.c
+++ b/net_ntrip.c
@@ -457,8 +457,6 @@ int ntrip_open(struct gps_device_t *device, char *caster)
     char *stream = NULL;
     char *url = NULL;
     int ret = -1;
-    char t[strlen(caster) + 1];
-    char *tmp = t;
 
     switch (device->ntrip.conn_state) {
 	case ntrip_conn_init:
@@ -467,14 +465,13 @@ int ntrip_open(struct gps_device_t *device, char *caster)
 	    device->ntrip.works = false;
 	    device->ntrip.sourcetable_parse = false;
 	    device->ntrip.stream.set = false;
-	    (void)strlcpy(tmp, caster, sizeof(t));
 
-	    if ((amp = strchr(tmp, '@')) != NULL) {
-		if (((colon = strchr(tmp, ':')) != NULL) && colon < amp) {
-		    auth = tmp;
+	    if ((amp = strchr(caster, '@')) != NULL) {
+		if (((colon = strchr(caster, ':')) != NULL) && colon < amp) {
+		    auth = caster;
 		    *amp = '\0';
-		    tmp = amp + 1;
-		    url = tmp;
+		    caster = amp + 1;
+		    url = caster;
 		} else {
 		    gpsd_log(&device->context->errout, LOG_ERROR,
 			     "can't extract user-ID and password from %s\n",
@@ -483,7 +480,7 @@ int ntrip_open(struct gps_device_t *device, char *caster)
 		    return -1;
 		}
 	    }
-	    if ((slash = strchr(tmp, '/')) != NULL) {
+	    if ((slash = strchr(caster, '/')) != NULL) {
 		*slash = '\0';
 		stream = slash + 1;
 	    } else {
@@ -494,7 +491,7 @@ int ntrip_open(struct gps_device_t *device, char *caster)
 		device->ntrip.conn_state = ntrip_conn_err;
 		return -1;
 	    }
-	    if ((colon = strchr(tmp, ':')) != NULL) {
+	    if ((colon = strchr(caster, ':')) != NULL) {
 		port = colon + 1;
 		*colon = '\0';
 	    }