Handling of El-Torito boot catalog at low level.

src/ecma119.c

@@ -854,6 +854,9 @@ int ecma119_image_new(IsoImage *src, Ecma119WriteOpts *opts, Ecma119Image **img)
     target->ms_block = opts->ms_block;
     target->appendable = opts->appendable;
     
+    /* el-torito? */
+    target->eltorito = (src->bootcat == NULL ? 0 : 1);
+
     /* default to locale charset */
     setlocale(LC_CTYPE, "");
     target->input_charset = strdup(nl_langinfo(CODESET));

src/ecma119.h

@@ -34,6 +34,7 @@ struct ecma119_image
     /* extensions */
     unsigned int rockridge :1;
     unsigned int joliet :1;
+    unsigned int eltorito :1;
 
     /* relaxed constraints */
     unsigned int omit_version_numbers :1;
@@ -107,6 +108,13 @@ struct ecma119_image
     uint32_t joliet_l_path_table_pos;
     uint32_t joliet_m_path_table_pos;
     
+    /*
+     * El-Torito related information
+     */
+    struct el_torito_boot_catalog *catalog;
+    IsoFileSrc *cat; /**< location of the boot catalog in the new image */
+    uint32_t imgblock; /**< location of the boot image in the new image */
+
     /*
      * Number of pad blocks that we need to write. Padding blocks are blocks
      * filled by 0s that we put between the directory structures and the file

src/ecma119_tree.c

@@ -15,6 +15,7 @@
 #include "messages.h"
 #include "image.h"
 #include "stream.h"
+#include "eltorito.h"
 
 #include <stdlib.h>
 #include <string.h>
@@ -160,6 +161,35 @@ int create_file(Ecma119Image *img, IsoFile *iso, Ecma119Node **node)
     return ret;
 }
 
+/**
+ * Create a new ECMA-119 node representing a regular file from an El-Torito
+ * boot catalog
+ */
+static
+int create_boot_cat(Ecma119Image *img, IsoBoot *iso, Ecma119Node **node)
+{
+    int ret;
+    IsoFileSrc *src;
+
+    ret = el_torito_catalog_file_src_create(img, &src);
+    if (ret < 0) {
+        return ret;
+    }
+
+    ret = create_ecma119_node(img, (IsoNode*)iso, node);
+    if (ret < 0) {
+        /* 
+         * the src doesn't need to be freed, it is free together with
+         * the Ecma119Image 
+         */
+        return ret;
+    }
+    (*node)->type = ECMA119_FILE;
+    (*node)->info.file = src;
+
+    return ret;
+}
+
 /**
  * Create a new ECMA-119 node representing a symbolic link from a iso symlink
  * node.
@@ -276,9 +306,15 @@ int create_tree(Ecma119Image *image, IsoNode *iso, Ecma119Node **tree,
         }
         break;
     case LIBISO_BOOT:
-        //TODO
-        free(iso_name);
-        return 0;
+        if (image->eltorito) {
+            ret = create_boot_cat(image, (IsoBoot*)iso, &node);
+        } else {
+            /* log and ignore */
+            iso_msg_note(image->image->messenger, LIBISO_FILE_IGNORED, 
+                "El-Torito catalog found on a image without El-Torito.", 
+                iso->name);
+            ret = 0;
+        }
         break;
     case LIBISO_DIR:
         {

src/eltorito.c

@@ -10,6 +10,7 @@
 #include "stream.h"
 #include "error.h"
 #include "fsource.h"
+#include "filesrc.h"
 #include "image.h"
 #include "messages.h"
 
@@ -482,7 +483,7 @@ void el_torito_boot_catalog_free(struct el_torito_boot_catalog *cat)
  */
 struct catalog_stream
 {
-    struct el_torito_boot_catalog *catalog;
+    Ecma119Image *target;
     uint8_t buffer[BLOCK_SIZE];
     int offset; /* -1 if stream is not openned */
 };
@@ -508,3 +509,212 @@ write_validation_entry(uint8_t *buf)
     }
     iso_lsb(ve->checksum, checksum, 2);
 }
+
+/**
+ * Write one section entry.
+ * Currently this is used only for default image (the only supported just now)
+ */
+static void
+write_section_entry(uint8_t *buf, Ecma119Image *t)
+{
+    struct el_torito_boot_image *img;
+    struct el_torito_section_entry *se = 
+        (struct el_torito_section_entry*)buf;
+        
+    img = t->catalog->image;
+
+    se->boot_indicator[0] = img->bootable ? 0x88 : 0x00;
+    se->boot_media_type[0] = img->type;
+    iso_lsb(se->load_seg, img->load_seg, 2);
+    se->system_type[0] = img->partition_type;
+    iso_lsb(se->sec_count, img->load_size, 2);
+    iso_lsb(se->block, t->imgblock, 4);
+}
+
+static
+int catalog_open(IsoStream *stream)
+{
+    struct catalog_stream *data;
+    if (stream == NULL) {
+        return ISO_NULL_POINTER;
+    }
+    data = stream->data;
+    
+    if (data->offset != -1) {
+        return ISO_FILE_ALREADY_OPENNED;
+    }
+    
+    memset(data->buffer, 0, BLOCK_SIZE);
+    
+    /* fill the buffer with the catalog contents */
+    write_validation_entry(data->buffer);
+
+    /* write default entry */
+    write_section_entry(data->buffer + 32, data->target);
+
+    data->offset = 0;
+    return ISO_SUCCESS;
+}
+
+static
+int catalog_close(IsoStream *stream)
+{
+    struct catalog_stream *data;
+    if (stream == NULL) {
+        return ISO_NULL_POINTER;
+    }
+    data = stream->data;
+    
+    if (data->offset == -1) {
+        return ISO_FILE_NOT_OPENNED;
+    }
+    data->offset = -1;
+    return ISO_SUCCESS;
+}
+
+static
+off_t catalog_get_size(IsoStream *stream)
+{
+    return BLOCK_SIZE;
+}
+
+static
+int catalog_read(IsoStream *stream, void *buf, size_t count)
+{
+    size_t len;
+    struct catalog_stream *data;
+    if (stream == NULL || buf == NULL) {
+        return ISO_NULL_POINTER;
+    }
+    if (count == 0) {
+        return ISO_WRONG_ARG_VALUE;
+    }
+    data = stream->data;
+    
+    if (data->offset == -1) {
+        return ISO_FILE_NOT_OPENNED;
+    }
+    
+    len = MIN(count, BLOCK_SIZE - data->offset);
+    memcpy(buf, data->buffer + data->offset, len);
+    return len;
+}
+
+static
+int catalog_is_repeatable(IsoStream *stream)
+{
+    return 1;
+}
+
+/**
+ * fs_id will be the id reserved for El-Torito
+ * dev_id will be 0 for catalog, 1 for boot image (if needed)
+ * we leave ino_id for future use when we support multiple boot images 
+ */
+static
+void catalog_get_id(IsoStream *stream, unsigned int *fs_id, dev_t *dev_id,
+                   ino_t *ino_id)
+{
+    *fs_id = ISO_ELTORITO_FS_ID;
+    *dev_id = 0;
+    *ino_id = 0;
+}
+
+static
+char *catalog_get_name(IsoStream *stream)
+{
+    return strdup("El-Torito Boot Catalog");
+}
+
+static
+void catalog_free(IsoStream *stream)
+{
+    free(stream->data);
+}
+
+IsoStreamIface catalog_stream_class = {
+    catalog_open,
+    catalog_close,
+    catalog_get_size,
+    catalog_read,
+    catalog_is_repeatable,
+    catalog_get_id,
+    catalog_get_name,
+    catalog_free
+};
+
+/**
+ * Create an IsoStream for writing El-Torito catalog for a given target. 
+ */
+static
+int catalog_stream_new(Ecma119Image *target, IsoStream **stream)
+{
+    IsoStream *str;
+    struct catalog_stream *data;
+
+    if (target == NULL || stream == NULL || target->catalog == NULL) {
+        return ISO_NULL_POINTER;
+    }
+
+    str = malloc(sizeof(IsoStream));
+    if (str == NULL) {
+        return ISO_MEM_ERROR;
+    }
+    data = malloc(sizeof(struct catalog_stream));
+    if (str == NULL) {
+        free(str);
+        return ISO_MEM_ERROR;
+    }
+
+    /* fill data */
+    data->target = target;
+    data->offset = -1;
+
+    str->refcount = 1;
+    str->data = data;
+    str->class = &catalog_stream_class;
+
+    *stream = str;
+    return ISO_SUCCESS;
+}
+
+int el_torito_catalog_file_src_create(Ecma119Image *target, IsoFileSrc **src)
+{
+    int ret;
+    IsoFileSrc *file;
+    IsoStream *stream;
+    
+    if (target == NULL || src == NULL || target->catalog == NULL) {
+        return ISO_MEM_ERROR;
+    }
+    
+    if (target->cat != NULL) {
+        /* catalog file src already created */
+        *src = target->cat;
+        return ISO_SUCCESS;
+    }
+    
+    file = malloc(sizeof(IsoFileSrc));
+    if (file == NULL) {
+        return ISO_MEM_ERROR;
+    }
+
+    ret = catalog_stream_new(target, &stream);
+    if (ret < 0) {
+        free(file);
+        return ret;
+    }
+    
+    /* fill fields */
+    file->prev_img = 0; /* TODO allow copy of old img catalog???? */
+    file->block = 0; /* to be filled later */
+    file->sort_weight = 1000; /* slightly high */
+    file->stream = stream;
+
+    ret = iso_file_src_add(target, file, src);
+    if (ret <= 0) {
+        iso_stream_unref(stream);
+        free(file);
+    }
+    return ret;
+}

src/eltorito.h

@@ -93,4 +93,11 @@ struct el_torito_section_entry {
 
 void el_torito_boot_catalog_free(struct el_torito_boot_catalog *cat);
 
+/**
+ * Create a IsoFileSrc for writing the el-torito catalog for the given
+ * target, and add it to target. If the target already has a src for the
+ * catalog, it just returns.
+ */
+int el_torito_catalog_file_src_create(Ecma119Image *target, IsoFileSrc **src);
+
 #endif /* LIBISO_ELTORITO_H */

src/filesrc.c

@@ -81,6 +81,38 @@ int iso_file_src_create(Ecma119Image *img, IsoFile *file, IsoFileSrc **src)
     return ISO_SUCCESS;
 }
 
+/**
+ * Add a given IsoFileSrc to the given image target.
+ * 
+ * The IsoFileSrc will be cached in a tree to prevent the same file for 
+ * being written several times to image. If you call again this function
+ * with a node that refers to the same source file, the previously
+ * created one will be returned.
+ * 
+ * @param img
+ *      The image where this file is to be written
+ * @param new
+ *      The IsoFileSrc to add
+ * @param src
+ *      Will be filled with a pointer to the IsoFileSrc really present in
+ *      the tree. It could be different than new if the same file already
+ *      exists in the tree. 
+ * @return
+ *      1 on success, 0 if file already exists on tree, < 0 error
+ */
+int iso_file_src_add(Ecma119Image *img, IsoFileSrc *new, IsoFileSrc **src)
+{
+    int ret;
+
+    if (img == NULL || new == NULL || src == NULL) {
+        return ISO_NULL_POINTER;
+    }
+    
+    /* insert the filesrc in the tree */
+    ret = iso_rbtree_insert(img->files, new, (void**)src);
+    return ret;
+}
+
 void iso_file_src_free(void *node)
 {
     free(node);

src/filesrc.h

@@ -43,6 +43,27 @@ int iso_file_src_cmp(const void *n1, const void *n2);
  */
 int iso_file_src_create(Ecma119Image *img, IsoFile *file, IsoFileSrc **src);
 
+/**
+ * Add a given IsoFileSrc to the given image target.
+ * 
+ * The IsoFileSrc will be cached in a tree to prevent the same file for 
+ * being written several times to image. If you call again this function
+ * with a node that refers to the same source file, the previously
+ * created one will be returned.
+ * 
+ * @param img
+ *      The image where this file is to be written
+ * @param new
+ *      The IsoFileSrc to add
+ * @param src
+ *      Will be filled with a pointer to the IsoFileSrc really present in
+ *      the tree. It could be different than new if the same file already
+ *      exists in the tree. 
+ * @return
+ *      1 on success, 0 if file already exists on tree, < 0 error
+ */
+int iso_file_src_add(Ecma119Image *img, IsoFileSrc *new, IsoFileSrc **src);
+
 /**
  * Free the IsoFileSrc especific data
  */

src/joliet.c

@@ -13,6 +13,7 @@
 #include "error.h"
 #include "image.h"
 #include "filesrc.h"
+#include "eltorito.h"
 
 #include <stdlib.h>
 #include <string.h>
@@ -118,9 +119,19 @@ int create_node(Ecma119Image *t, IsoNode *iso, JolietNode **node)
         }
         joliet->info.file = src;
         joliet->type = JOLIET_FILE;
+    } else if (iso->type == LIBISO_BOOT) {
+        /* it's a el-torito boot catalog, that we write as a file */
+        IsoFileSrc *src;
+
+        ret = el_torito_catalog_file_src_create(t, &src);
+        if (ret < 0) {
+            free(joliet);
+            return ret;
+        }
+        joliet->info.file = src;
+        joliet->type = JOLIET_FILE;
     } else {
         /* should never happen */
-        //TODO handle boot nodes?!?
         free(joliet);
         return ISO_ERROR;
     }
@@ -205,8 +216,15 @@ int create_tree(Ecma119Image *t, IsoNode *iso, JolietNode **tree, int pathlen)
         }
         break;
     case LIBISO_BOOT:
-        //TODO
-        return 0;
+        if (t->eltorito) {
+            ret = create_node(t, iso, &node);
+        } else {
+            /* log and ignore */
+            iso_msg_note(t->image->messenger, LIBISO_FILE_IGNORED, 
+                "El-Torito catalog found on a image without El-Torito.", 
+                iso->name);
+            ret = 0;
+        }
         break;
     case LIBISO_SYMLINK:
     case LIBISO_SPECIAL: