nfc_device_new(): replace err() by return

Not a good idea to call exit() from a library...

libnfc/drivers/acr122_pcsc.c

@@ -280,6 +280,10 @@ acr122_pcsc_open(const nfc_context *context, const nfc_connstring connstring)
 
   char   *pcFirmware;
   nfc_device *pnd = nfc_device_new(context, fullconnstring);
+  if (!pnd) {
+    perror("malloc");
+    goto error;
+  }
   pnd->driver_data = malloc(sizeof(struct acr122_pcsc_data));
   if (!pnd->driver_data) {
     perror("malloc");

libnfc/drivers/acr122_usb.c

@@ -475,6 +475,10 @@ acr122_usb_open(const nfc_context *context, const nfc_connstring connstring)
       data.model = acr122_usb_get_device_model(dev->descriptor.idVendor, dev->descriptor.idProduct);
       // Allocate memory for the device info and specification, fill it and return the info
       pnd = nfc_device_new(context, connstring);
+      if (!pnd) {
+        perror("malloc");
+        goto error;
+      }
       acr122_usb_get_usb_device_name(dev, data.pudh, pnd->name, sizeof(pnd->name));
 
       pnd->driver_data = malloc(sizeof(struct acr122_usb_data));

libnfc/drivers/acr122s.c

@@ -470,6 +470,10 @@ acr122s_scan(const nfc_context *context, nfc_connstring connstrings[], const siz
       nfc_connstring connstring;
       snprintf(connstring, sizeof(nfc_connstring), "%s:%s:%"PRIu32, ACR122S_DRIVER_NAME, acPort, ACR122S_DEFAULT_SPEED);
       nfc_device *pnd = nfc_device_new(context, connstring);
+      if (!pnd) {
+        perror("malloc");
+        return -1;
+      }
 
       pnd->driver = &acr122s_driver;
       pnd->driver_data = malloc(sizeof(struct acr122s_data));
@@ -574,6 +578,10 @@ acr122s_open(const nfc_context *context, const nfc_connstring connstring)
   uart_set_speed(sp, ndd.speed);
 
   pnd = nfc_device_new(context, connstring);
+  if (!pnd) {
+    perror("malloc");
+    return NULL;
+  }
   pnd->driver = &acr122s_driver;
   strcpy(pnd->name, ACR122S_DRIVER_NAME);
 

libnfc/drivers/arygon.c

@@ -114,6 +114,10 @@ arygon_scan(const nfc_context *context, nfc_connstring connstrings[], const size
       nfc_connstring connstring;
       snprintf(connstring, sizeof(nfc_connstring), "%s:%s:%"PRIu32, ARYGON_DRIVER_NAME, acPort, ARYGON_DEFAULT_SPEED);
       nfc_device *pnd = nfc_device_new(context, connstring);
+      if (!pnd) {
+        perror("malloc");
+        return 0;
+      }
 
       pnd->driver = &arygon_driver;
       pnd->driver_data = malloc(sizeof(struct arygon_data));
@@ -263,6 +267,10 @@ arygon_open(const nfc_context *context, const nfc_connstring connstring)
 
   // We have a connection
   pnd = nfc_device_new(context, connstring);
+  if (!pnd) {
+    perror("malloc");
+    return NULL;
+  }
   snprintf(pnd->name, sizeof(pnd->name), "%s:%s", ARYGON_DRIVER_NAME, ndd.port);
 
   pnd->driver_data = malloc(sizeof(struct arygon_data));

libnfc/drivers/pn532_uart.c

@@ -88,6 +88,10 @@ pn532_uart_scan(const nfc_context *context, nfc_connstring connstrings[], const
       nfc_connstring connstring;
       snprintf(connstring, sizeof(nfc_connstring), "%s:%s:%"PRIu32, PN532_UART_DRIVER_NAME, acPort, PN532_UART_DEFAULT_SPEED);
       nfc_device *pnd = nfc_device_new(context, connstring);
+      if (!pnd) {
+        perror("malloc");
+        return 0;
+      }
       pnd->driver = &pn532_uart_driver;
       pnd->driver_data = malloc(sizeof(struct pn532_uart_data));
       if (!pnd->driver_data) {
@@ -240,6 +244,10 @@ pn532_uart_open(const nfc_context *context, const nfc_connstring connstring)
 
   // We have a connection
   pnd = nfc_device_new(context, connstring);
+  if (!pnd) {
+    perror("malloc");
+    return NULL;
+  }
   snprintf(pnd->name, sizeof(pnd->name), "%s:%s", PN532_UART_DRIVER_NAME, ndd.port);
 
   pnd->driver_data = malloc(sizeof(struct pn532_uart_data));

libnfc/drivers/pn53x_usb.c

@@ -360,6 +360,10 @@ pn53x_usb_open(const nfc_context *context, const nfc_connstring connstring)
       data.model = pn53x_usb_get_device_model(dev->descriptor.idVendor, dev->descriptor.idProduct);
       // Allocate memory for the device info and specification, fill it and return the info
       pnd = nfc_device_new(context, connstring);
+      if (!pnd) {
+        perror("malloc");
+        goto error;
+      }
       pn53x_usb_get_usb_device_name(dev, data.pudh, pnd->name, sizeof(pnd->name));
 
       pnd->driver_data = malloc(sizeof(struct pn53x_usb_data));

libnfc/nfc-device.c

@@ -38,7 +38,7 @@ nfc_device_new(const nfc_context *context, const nfc_connstring connstring)
   nfc_device *res = malloc(sizeof(*res));
 
   if (!res) {
-    err(EXIT_FAILURE, "nfc_device_new: malloc");
+    return NULL;
   }
 
   // Store associated context