Add a function to identify a Stream, for user notification.

src/filesrc.c

@@ -237,9 +237,10 @@ int filesrc_writer_write_data(IsoImageWriter *writer)
              * UPS, very ugly error, the best we can do is just to write
              * 0's to image
              */
-            // TODO Stream needs a get_path function
-            iso_msg_sorry(t->image, LIBISO_FILE_CANT_WRITE,
-                          "File XXX can't be openned. Filling with 0s.");
+            char *name = iso_stream_get_name(file->stream);
+            iso_msg_sorry(t->image, LIBISO_FILE_CANT_WRITE, "File \"%s\" can't"
+                          " be opened. Filling with 0s.", name);
+            free(name);
             memset(buffer, 0, BLOCK_SIZE);
             for (b = 0; b < nblocks; ++b) {
                 res = iso_write(t, buffer, BLOCK_SIZE);
@@ -264,15 +265,18 @@ int filesrc_writer_write_data(IsoImageWriter *writer)
 
         if (b < nblocks) {
             /* premature end of file, due to error or eof */
+            char *name = iso_stream_get_name(file->stream);
             if (res < 0) {
                 /* error */
                 iso_msg_sorry(t->image, LIBISO_FILE_CANT_WRITE,
-                              "Read error in file XXXXX.");
+                              "Read error in file %s.", name);
             } else {
                 /* eof */
                 iso_msg_sorry(t->image, LIBISO_FILE_CANT_WRITE,
-                              "Premature end of file XXXXX.");
+                              "Premature end of file %s.", name);
             }
+            free(name);
+
             /* fill with 0s */
             iso_msg_sorry(t->image, LIBISO_FILE_CANT_WRITE, "Filling with 0");
             memset(buffer, 0, BLOCK_SIZE);

src/stream.c

@@ -12,6 +12,7 @@
 #include "error.h"
 
 #include <stdlib.h>
+#include <string.h>
 
 typedef struct
 {
@@ -112,6 +113,14 @@ int fsrc_get_id(IsoStream *stream, unsigned int *fs_id, dev_t *dev_id,
     return ISO_SUCCESS;
 }
 
+static
+char *fsrc_get_name(IsoStream *stream)
+{
+    FSrcStreamData *data;
+    data = (FSrcStreamData*)stream->data;
+    return strdup(iso_file_source_get_path(data->src));
+}
+
 static
 void fsrc_free(IsoStream *stream)
 {
@@ -128,6 +137,7 @@ IsoStreamIface fsrc_stream_class = {
     fsrc_read,
     fsrc_is_repeatable,
     fsrc_get_id,
+    fsrc_get_name,
     fsrc_free
 };
 

src/stream.h

@@ -80,6 +80,13 @@ typedef struct IsoStream_Iface
     int (*get_id)(IsoStream *stream, unsigned int *fs_id, dev_t *dev_id,
                   ino_t *ino_id);
 
+    /**
+     * Get a name that identifies the Stream contents. It is used only for
+     * informational or debug purposes, so you can return anything you 
+     * consider suitable for identification of the source, such as the path.
+     */
+    char *(*get_name)(IsoStream *stream);
+
     /**
      * Free implementation specific data. Should never be called by user.
      * Use iso_stream_unref() instead.
@@ -134,6 +141,12 @@ int iso_stream_get_id(IsoStream *stream, unsigned int *fs_id, dev_t *dev_id,
     return stream->class->get_id(stream, fs_id, dev_id, ino_id);
 }
 
+extern inline
+char *iso_stream_get_name(IsoStream *stream)
+{
+    return stream->class->get_name(stream);
+}
+
 /**
  * Create a stream to read from a IsoFileSource.
  * The stream will take the ref. to the IsoFileSource, so after a successfully