New API call iso_write_opts_set_appended_as_gpt()

and marking of appended partitions in GPT if GPT emerges for other reasons.

libisofs/ecma119.c

@@ -1,7 +1,7 @@
 /*
  * Copyright (c) 2007 Vreixo Formoso
  * Copyright (c) 2007 Mario Danic
- * Copyright (c) 2009 - 2013 Thomas Schmitt
+ * Copyright (c) 2009 - 2015 Thomas Schmitt
  *
  * This file is part of the libisofs project; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License version 2 
@@ -1318,12 +1318,18 @@ ex:
 static
 int write_head_part1(Ecma119Image *target, int *write_count, int flag)
 {
-    int res, i;
-    uint8_t *sa;
+    int res, i, ret;
+    uint8_t *sa, *sa_local = NULL;
     IsoImageWriter *writer;
     size_t buffer_size = 0, buffer_free = 0, buffer_start_free = 0;
 
-    sa = target->sys_area_as_written;
+    if (target->sys_area_already_written) {
+        LIBISO_ALLOC_MEM(sa_local, uint8_t, 16 * BLOCK_SIZE);
+        sa = sa_local;
+    } else {
+        sa = target->sys_area_as_written;
+        target->sys_area_already_written = 1;
+    }
     iso_ring_buffer_get_buf_status(target->buffer, &buffer_size,
                                    &buffer_start_free);
     *write_count = 0;
@@ -1360,9 +1366,16 @@ int write_head_part1(Ecma119Image *target, int *write_count, int flag)
       *write_count = target->bytes_written / BLOCK_SIZE;
     }
 
-    return ISO_SUCCESS;
+    ret = ISO_SUCCESS;
+    goto ex;
+
 write_error:;
-    return res;
+    ret = res;
+    goto ex;
+
+ex:
+    LIBISO_FREE_MEM(sa_local);
+    return ret;
 }
 
 static
@@ -1483,6 +1496,10 @@ int iso_write_partition_file(Ecma119Image *target, char *path,
             goto ex;
     }
 
+/* >>> need opportunity to read from input ISO image
+       resp. to just mark a partition in the older sessions
+*/;
+
     fp = fopen(path, "rb");
     if (fp == NULL)
         {ret = ISO_BAD_PARTITION_FILE; goto ex;}
@@ -1528,8 +1545,10 @@ void issue_ucs2_warning_summary(size_t failures)
 static
 void *write_function(void *arg)
 {
-    int res, first_partition = 1, last_partition = 0, sa_type;
-    int i;
+    int res, i;
+#ifndef Libisofs_appended_partitions_inlinE
+    int first_partition = 1, last_partition = 0, sa_type;
+#endif
     IsoImageWriter *writer;
 
     Ecma119Image *target = (Ecma119Image*)arg;
@@ -1545,12 +1564,17 @@ void *write_function(void *arg)
     /* write data for each writer */
     for (i = 0; i < (int) target->nwriters; ++i) {
         writer = target->writers[i];
+        if (target->gpt_backup_outside &&
+            writer->write_vol_desc == gpt_tail_writer_write_vol_desc)
+    continue;
         res = writer->write_data(writer);
         if (res < 0) {
             goto write_error;
         }
     }
 
+#ifndef Libisofs_appended_partitions_inlinE
+
     /* Append partition data */
     sa_type = (target->system_area_options >> 2) & 0x3f;
     if (sa_type == 0) { /* MBR */
@@ -1573,6 +1597,19 @@ void *write_function(void *arg)
             goto write_error;
     }
 
+#endif /* ! Libisofs_appended_partitions_inlinE */
+
+    if (target->gpt_backup_outside) {
+        for (i = 0; i < (int) target->nwriters; ++i) {
+            writer = target->writers[i];
+            if (writer->write_vol_desc != gpt_tail_writer_write_vol_desc)
+        continue;
+            res = writer->write_data(writer);
+            if (res < 0)
+                goto write_error;
+        }
+    }
+
     /* Transplant checksum buffer from Ecma119Image to IsoImage */
     transplant_checksum_buffer(target, 0);
 
@@ -1927,6 +1964,7 @@ int ecma119_image_new(IsoImage *src, IsoWriteOpts *in_opts, Ecma119Image **img)
         target->appended_part_prepad[i] = 0;
         target->appended_part_start[i] = target->appended_part_size[i] = 0;
     }
+    target->have_appended_partitions = 0;
     for (i = 0; i < ISO_HFSPLUS_BLESS_MAX; i++) {
         target->hfsplus_blessed[i] = src->hfsplus_blessed[i];
         if (target->hfsplus_blessed[i] != NULL)
@@ -1946,6 +1984,7 @@ int ecma119_image_new(IsoImage *src, IsoWriteOpts *in_opts, Ecma119Image **img)
         target->gpt_req[i] = NULL;
     target->gpt_req_count = 0;
     target->gpt_req_flags = 0;
+    target->gpt_backup_outside = 0;
     target->gpt_disk_guid_set = 0;
     target->gpt_part_start = 0;
     target->gpt_backup_end = 0;
@@ -1953,11 +1992,23 @@ int ecma119_image_new(IsoImage *src, IsoWriteOpts *in_opts, Ecma119Image **img)
     target->gpt_max_entries = 0;
     target->gpt_is_computed = 0;
 
+    target->sys_area_already_written = 0;
+
     target->filesrc_start = 0;
     target->filesrc_blocks = 0;
 
     target->joliet_ucs2_failures = 0;
 
+    /* If partitions get appended, then the backup GPT cannot be part of
+       the ISO filesystem.
+    */
+    for (i = 0; i < ISO_MAX_PARTITIONS; i++)
+       if (target->opts->appended_partitions[i] != NULL) {
+           target->gpt_backup_outside = 1;
+           target->have_appended_partitions = 1;
+    break;
+       }
+
     /*
      * 2. Based on those options, create needed writers: iso, joliet...
      * Each writer inits its structures and stores needed info into
@@ -1991,6 +2042,13 @@ int ecma119_image_new(IsoImage *src, IsoWriteOpts *in_opts, Ecma119Image **img)
     if (opts->hfsplus || opts->fat) {
         nwriters+= 2;
     }
+
+#ifdef Libisofs_appended_partitions_inlinE
+
+    nwriters++; /* Inline Partition Append Writer */
+
+#endif
+
     nwriters++; /* GPT backup tail writer */
     nwriters++; /* Tail padding writer */
     if ((opts->md5_file_checksums & 1) || opts->md5_session_checksum) {
@@ -2139,6 +2197,14 @@ int ecma119_image_new(IsoImage *src, IsoWriteOpts *in_opts, Ecma119Image **img)
 
 #endif /* Libisofs_checksums_before_paddinG */
 
+#ifdef Libisofs_appended_partitions_inlinE
+
+    ret = partappend_writer_create(target);
+    if (ret < 0) 
+        goto target_cleanup;
+
+#endif /* Libisofs_appended_partitions_inlinE */
+
 #ifdef Libisofs_gpt_writer_lasT
     /* This writer shall be the last one in the list, because it protects the
        image on media which are seen as GPT partitioned.
@@ -2204,6 +2270,10 @@ int ecma119_image_new(IsoImage *src, IsoWriteOpts *in_opts, Ecma119Image **img)
     for (i = 0; i < (int) target->nwriters; ++i) {
         IsoImageWriter *writer = target->writers[i];
 
+        if (target->gpt_backup_outside &&
+            writer->write_vol_desc == gpt_tail_writer_write_vol_desc)
+    continue;
+
         /* Exposing address of data start to IsoWriteOpts and memorizing
            this address for all files which have no block address: 
            symbolic links, device files, empty data files.
@@ -2220,6 +2290,14 @@ int ecma119_image_new(IsoImage *src, IsoWriteOpts *in_opts, Ecma119Image **img)
         if (ret < 0) {
             goto target_cleanup;
         }
+
+#ifdef Libisofs_appended_partitions_inlinE
+
+        target->vol_space_size = target->curblock - opts->ms_block;
+        target->total_size = (off_t) target->vol_space_size * BLOCK_SIZE;
+
+#endif
+
     }
 
     ret = iso_patch_eltoritos(target);
@@ -2231,6 +2309,8 @@ int ecma119_image_new(IsoImage *src, IsoWriteOpts *in_opts, Ecma119Image **img)
             goto target_cleanup;
     }
 
+#ifndef Libisofs_appended_partitions_inlinE
+
     /*
      * The volume space size is just the size of the last session, in
      * case of ms images.
@@ -2243,6 +2323,20 @@ int ecma119_image_new(IsoImage *src, IsoWriteOpts *in_opts, Ecma119Image **img)
     if (ret < 0)
         goto target_cleanup;
 
+#endif /* ! Libisofs_appended_partitions_inlinE */
+
+    if (target->gpt_backup_outside) {
+        for (i = 0; i < (int) target->nwriters; ++i) {
+            IsoImageWriter *writer = target->writers[i];
+
+            if (writer->write_vol_desc != gpt_tail_writer_write_vol_desc)
+        continue;
+            ret = writer->compute_data_blocks(writer);
+            if (ret < 0)
+                goto target_cleanup;
+        }
+    }
+
     /* create the ring buffer */
     if (opts->overwrite != NULL &&
         opts->fifo_size < 32 + opts->partition_offset) {
@@ -2732,6 +2826,7 @@ int iso_write_opts_new(IsoWriteOpts **opts, int profile)
     wopts->efi_boot_partition = NULL;
     for (i = 0; i < ISO_MAX_PARTITIONS; i++)
         wopts->appended_partitions[i] = NULL;
+    wopts->appended_as_gpt = 0;
     wopts->ascii_disc_label[0] = 0;
     wopts->will_cancel = 0;
     wopts->allow_dir_id_ext = 0;
@@ -3445,6 +3540,12 @@ int iso_write_opts_set_partition_img(IsoWriteOpts *opts, int partition_number,
     return ISO_SUCCESS;
 }
 
+int iso_write_opts_set_appended_as_gpt(IsoWriteOpts *opts, int gpt)
+{
+    opts->appended_as_gpt = !!gpt;
+    return ISO_SUCCESS;
+}
+
 int iso_write_opts_set_disc_label(IsoWriteOpts *opts, char *label)
 {
     strncpy(opts->ascii_disc_label, label, ISO_DISC_LABEL_SIZE - 1);

libisofs/ecma119.h

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2007 Vreixo Formoso
- * Copyright (c) 2009 - 2013 Thomas Schmitt
+ * Copyright (c) 2009 - 2015 Thomas Schmitt
  *
  * This file is part of the libisofs project; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License version 2 
@@ -480,6 +480,10 @@ struct iso_write_opts {
     char *appended_partitions[ISO_MAX_PARTITIONS]; 
     uint8_t appended_part_types[ISO_MAX_PARTITIONS];
 
+    /* If 1: With appended partitions: create protective MBR and mark by GPT
+     */
+    int appended_as_gpt;
+
     /* Eventual name of the non-ISO aspect of the image. E.g. SUN ASCII label.
      */
     char ascii_disc_label[ISO_DISC_LABEL_SIZE];
@@ -756,6 +760,7 @@ struct ecma119_image
     uint32_t appended_part_prepad[ISO_MAX_PARTITIONS];
     uint32_t appended_part_start[ISO_MAX_PARTITIONS];
     uint32_t appended_part_size[ISO_MAX_PARTITIONS];
+    int have_appended_partitions;
 
     /* See IsoImage and libisofs.h */
     IsoNode *hfsplus_blessed[ISO_HFSPLUS_BLESS_MAX];
@@ -802,6 +807,9 @@ struct ecma119_image
     /* bit0= GPT partitions may overlap */
     int gpt_req_flags;
 
+    /* Whether the eventual backup GPT is not part of the ISO filesystem */
+    int gpt_backup_outside;
+
     uint32_t efi_boot_part_size;
     IsoFileSrc *efi_boot_part_filesrc; /* Just a pointer. Do not free. */
 
@@ -822,6 +830,7 @@ struct ecma119_image
        write_data() methods of the writers.
     */
     uint8_t sys_area_as_written[16 * BLOCK_SIZE];
+    int sys_area_already_written;
 
     /* Size of the filesrc_writer area (data file content).
        This is available before any IsoImageWriter.compute_data_blocks()

libisofs/fs_image.c

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2007 Vreixo Formoso
- * Copyright (c) 2009 - 2014 Thomas Schmitt
+ * Copyright (c) 2009 - 2015 Thomas Schmitt
  *
  * This file is part of the libisofs project; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License version 2 
@@ -4014,7 +4014,7 @@ int iso_analyze_gpt_backup(IsoImage *image, IsoDataSource *src, int flag)
     if (sai->gpt_backup_lba >= ((uint64_t) sai->image_size) * 4 &&
         (sai->mbr_req_count < 1 ||
          sai->mbr_req[0]->start_block + sai->mbr_req[0]->block_count
-         != sai->gpt_backup_lba + 1))
+         > sai->gpt_backup_lba + 1))
         sprintf(comments + strlen(comments), "Implausible header LBA %.f, ",
                 (double) sai->gpt_backup_lba);
     iso_block = sai->gpt_backup_lba / 4;
@@ -4254,6 +4254,26 @@ int iso_analyze_gpt(IsoImage *image, IsoDataSource *src, int flag)
             }
         }
     }
+
+    /* Check first GPT partition for ISO partition offset */
+    if (sai->partition_offset == 0 && sai->mbr_req_count > 0 &&
+        sai->gpt_req_count > 0) {
+        if (sai->mbr_req[0]->type_byte == 0xee &&
+            sai->mbr_req[0]->start_block == 1) { /* protective MBR */
+            start_block = sai->gpt_req[0]->start_block;
+            block_count = sai->gpt_req[0]->block_count;
+            if (start_block >= 64 && block_count >= 72 &&
+                start_block <= 2048 && start_block % 4 == 0 &&
+                block_count % 4 == 0 &&
+                (start_block + block_count) / 4 == sai->image_size) {
+
+                ret = iso_analyze_partition_offset(image, src, start_block, 0);
+                if (ret < 0)
+                    return ret;
+            }
+        }
+    }
+
     return 1;
 }
 

libisofs/libisofs.h

@@ -4,7 +4,7 @@
 
 /*
  * Copyright (c) 2007-2008 Vreixo Formoso, Mario Danic
- * Copyright (c) 2009-2014 Thomas Schmitt
+ * Copyright (c) 2009-2015 Thomas Schmitt
  *
  * This file is part of the libisofs project; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License version 2 
@@ -2502,6 +2502,24 @@ int iso_write_opts_set_efi_bootp(IsoWriteOpts *opts, char *image_path,
 int iso_write_opts_set_partition_img(IsoWriteOpts *opts, int partition_number,
                            uint8_t partition_type, char *image_path, int flag);
 
+/**
+ * Control whether partitions created by iso_write_opts_set_partition_img()
+ * are to be represented in MBR or as GPT partitions.
+ * 
+ * @param opts
+ *        The option set to be manipulated.
+ * @param gpt
+ *        0= represent as MBR partition; as GPT only if other GPT partitions
+ *           are present
+ *        1= represent as GPT partition and cause protective MBR with a single
+ *           partition which covers the whole output data.
+ *           This may fail if other settings demand MBR partitions.
+ * @return
+ *        ISO_SUCCESS or error
+ *
+ * @since 1.4.0
+ */
+int iso_write_opts_set_appended_as_gpt(IsoWriteOpts *opts, int gpt);
 
 /**
  * Inquire the start address of the file data blocks after having used
@@ -3730,8 +3748,8 @@ int iso_image_get_system_area(IsoImage *img, char data[32768],
 "If an MBR is detected, with at least one partition entry of non-zero size,", \
 "then there may be:", \
 "  Partition offset   : decimal", \
-"       if not 0 then a second ISO 9660 superblock was found to which MBR", \
-"       partition 1 is pointing.", \
+"       if not 0 then a second ISO 9660 superblock was found to which", \
+"       MBR partition 1 or GPT partition 1 is pointing.", \
 "  MBR heads per cyl  : decimal", \
 "       conversion factor between MBR C/H/S address and LBA. 0=inconsistent.", \
 "  MBR secs per head  : decimal", \

libisofs/libisofs.ver

@@ -290,6 +290,7 @@ iso_write_opts_set_allow_longer_paths;
 iso_write_opts_set_allow_lowercase;
 iso_write_opts_set_always_gmt;
 iso_write_opts_set_appendable;
+iso_write_opts_set_appended_as_gpt;
 iso_write_opts_set_default_dir_mode;
 iso_write_opts_set_default_file_mode;
 iso_write_opts_set_default_gid;

libisofs/make_isohybrid_mbr.c

@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2008 - 2015 Thomas Schmitt
+ * with special credits to H. Peter Anvin for isohybrid
+ * and to Matthew Garrett for isohybrid with GPT and APM 
+ *
+ * This file is part of the libisofs project; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2
+ * or later as published by the Free Software Foundation.
+ * See COPYING file for details.
+ */
 
 #ifdef HAVE_CONFIG_H
 #include "../config.h"
@@ -559,6 +569,7 @@ static int gpt_images_as_mbr_partitions(Ecma119Image *t, char *wpt,
 
 /*
  * @param flag  bit0= make own random MBR Id from current time
+ *              bit1= create protective MBR as of UEFI/GPT specs
  */
 int make_isolinux_mbr(uint32_t *img_blocks, Ecma119Image *t,
                       int part_offset, int part_number, int fs_type,
@@ -574,6 +585,11 @@ int make_isolinux_mbr(uint32_t *img_blocks, Ecma119Image *t,
     struct timeval tv;
     struct timezone tz;
 
+    if (flag & 2) {
+        part_number = 1;
+        part_offset = 1;
+    }
+
     hd_img_blocks = ((off_t) *img_blocks) * (off_t) 4;
 
     boot_lba = t->bootsrc[0]->sections[0].block;
@@ -639,14 +655,17 @@ int make_isolinux_mbr(uint32_t *img_blocks, Ecma119Image *t,
             wpt+= 16;
     continue;
         }
-        /* write byte 0x80
+        /* write byte 0x80 if bootable
            write LBA_to_CHS(partition_offset)
            write byte filesystem_type
            write LBA_to_CHS(image_size-1)
            write dword partition_offset
            write dword image_size
         */
-        lsb_to_buf(&wpt, 0x80, 8, 0);
+        if (flag & 2)
+            lsb_to_buf(&wpt, 0x00, 8, 0);
+        else
+            lsb_to_buf(&wpt, 0x80, 8, 0);
         lba512chs_to_buf(&wpt, part_offset, head_count, sector_count);
         lsb_to_buf(&wpt, fs_type, 8, 0);
         lba512chs_to_buf(&wpt, hd_img_blocks - 1, head_count, sector_count);

libisofs/system_area.c

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2008 Vreixo Formoso
- * Copyright (c) 2010 - 2014 Thomas Schmitt
+ * Copyright (c) 2010 - 2015 Thomas Schmitt
  *
  * This file is part of the libisofs project; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License version 2 
@@ -128,6 +128,7 @@ static uint32_t compute_partition_size(char *disk_path, uint32_t *size,
 }
 
 /* Compute size and position of appended partitions.
+   @param flag bit0= Partitions inside ISO : update t->curblock
 */
 int iso_compute_append_partitions(Ecma119Image *t, int flag)
 {
@@ -170,6 +171,8 @@ int iso_compute_append_partitions(Ecma119Image *t, int flag)
         t->appended_part_size[i] = size;
         pos += add_pos + size;
         t->total_size += (add_pos + size) * 2048;
+        if (flag & 1)
+            t->curblock = pos;
     }
     return ISO_SUCCESS;
 }
@@ -312,6 +315,7 @@ int make_grub_msdos_label(uint32_t img_blocks, int sph, int hpc,
 
 
 /* @param flag bit0= zeroize partitions entries 2, 3, 4
+               bit0= UEFI protective MBR: start LBA = 1
 */
 static
 int iso_offset_partition_start(uint32_t img_blocks, uint32_t partition_offset,
@@ -326,6 +330,11 @@ int iso_offset_partition_start(uint32_t img_blocks, uint32_t partition_offset,
                            &start_lba, &start_sec, &start_head, &start_cyl, 1);
     iso_compute_cyl_head_sec((uint64_t) img_blocks, hpc, sph,
                              &end_lba, &end_sec, &end_head, &end_cyl, 0);
+    if (flag & 2) {
+        start_lba = 1;
+        start_sec = 2;
+        start_head = start_cyl = 0;
+    }
     wpt = buf + 446;
 
     /* Let pass only legal bootability values */
@@ -1552,7 +1561,11 @@ static int iso_write_gpt(Ecma119Image *t, uint32_t img_blocks, uint8_t *buf)
             }
         } else if (part_end < goal) {
             memset(gpt_name, 0, 72);
-            sprintf((char *) gpt_name, "Gap%d", gap_counter);
+            if (goal == t->vol_space_size * (uint64_t) 4 &&
+                part_end == t->opts->partition_offset * (uint64_t) 4)
+                sprintf((char *) gpt_name, "ISO9660");
+            else
+                sprintf((char *) gpt_name, "Gap%d", gap_counter);
             iso_ascii_utf_16le(gpt_name);
             gap_counter++;
             ret = iso_quick_gpt_entry(t->gpt_req, &(t->gpt_req_count),
@@ -1577,6 +1590,9 @@ static int iso_write_gpt(Ecma119Image *t, uint32_t img_blocks, uint8_t *buf)
         end_lba = req->start_block + req->block_count;
         backup_end_lba = ((uint64_t) t->gpt_backup_end - t->gpt_backup_size) *
                          4;
+        if (req->start_block == t->opts->partition_offset * ((uint64_t) 4) &&
+            req->block_count == ((uint64_t) 4) * 0xffffffff)
+            end_lba = t->vol_space_size * 4;
         if (end_lba > backup_end_lba)
             end_lba = backup_end_lba;
         end_lba = end_lba - 1;
@@ -1601,9 +1617,10 @@ static int iso_write_gpt(Ecma119Image *t, uint32_t img_blocks, uint8_t *buf)
 int iso_write_system_area(Ecma119Image *t, uint8_t *buf)
 {
     int ret, int_img_blocks, sa_type, i, will_append = 0, do_isohybrid = 0;
-    int first_partition = 1, last_partition = 4, apm_flag, part_type;
-    int gpt_count = 0, gpt_idx[128], apm_count = 0;
-    uint32_t img_blocks;
+    int first_partition = 1, last_partition = 4, apm_flag, part_type = 0;
+    int gpt_count = 0, gpt_idx[128], apm_count = 0, no_boot_mbr = 0;
+    int offset_flag = 0;
+    uint32_t img_blocks, gpt_blocks, mbrp1_blocks;
     uint64_t blk;
     uint8_t *wpt;
 
@@ -1695,7 +1712,12 @@ int iso_write_system_area(Ecma119Image *t, uint8_t *buf)
     }
     if (t->mbr_req_count > 0 && sa_type != 0)
         return ISO_NON_MBR_SYS_AREA;
-    ret = iso_write_gpt(t, img_blocks, buf);
+
+    if (t->gpt_backup_outside)
+        gpt_blocks = t->total_size / 2048;
+    else
+        gpt_blocks = img_blocks;
+    ret = iso_write_gpt(t, gpt_blocks, buf);
     if (ret < 0) {
         iso_msg_submit(t->image->id, ret, 0, "Cannot set up GPT");
         return ret;
@@ -1724,12 +1746,19 @@ int iso_write_system_area(Ecma119Image *t, uint8_t *buf)
         else
             part_type = 0x17;
 
+        if (t->opts->appended_as_gpt && t->have_appended_partitions) {
+            part_type = 0xee;
+            img_blocks = gpt_blocks;
+            no_boot_mbr = 2;
+        }
+
         /* >>> ??? Why is partition_offset 0 here ?
                    It gets adjusted later by iso_offset_partition_start()
                    Would it harm to give the real offset here ?
         */;
 
-        ret = make_isolinux_mbr(&img_blocks, t, 0, 1, part_type, buf, 1);
+        ret = make_isolinux_mbr(&img_blocks, t, 0, 1, part_type, buf,
+                                1 | no_boot_mbr);
         if (ret != 1)
             return ret;
     } else if (sa_type == 1) {
@@ -1773,9 +1802,17 @@ int iso_write_system_area(Ecma119Image *t, uint8_t *buf)
            With t->mbr_req_count > 0 this has already been done,
         */
         img_blocks = t->curblock;                  /* value might be altered */
-        ret = iso_offset_partition_start(img_blocks, t->opts->partition_offset,
+        if (part_type == 0xee) {
+            mbrp1_blocks = t->total_size / 2048;
+            offset_flag |= 2 | 1; /* protective MBR, no other partitions */
+        } else {
+            mbrp1_blocks = img_blocks;
+        }
+        ret = iso_offset_partition_start(mbrp1_blocks,
+                                         t->opts->partition_offset,
                                          t->partition_secs_per_head,
-                                         t->partition_heads_per_cyl, buf, 0);
+                                         t->partition_heads_per_cyl, buf,
+                                         offset_flag);
         if (ret != ISO_SUCCESS) /* error should never happen */
             return ISO_ASSERT_FAILURE;
     }
@@ -1783,27 +1820,29 @@ int iso_write_system_area(Ecma119Image *t, uint8_t *buf)
     /* This eventually overwrites the non-mbr_req partition table entries
        made so far. Overwriting those from t->mbr_req is not allowed.
     */
-    for (i = first_partition - 1; i <= last_partition - 1; i++) {
-        if (t->opts->appended_partitions[i] == NULL)
-    continue;
-        if (i < t->mbr_req_count)
-            return ISO_BOOT_MBR_COLLISION;
-        if (sa_type == 3) {
-            ret = write_sun_partition_entry(i + 1,
+    if (sa_type == 3 || !t->opts->appended_as_gpt) {
+        for (i = first_partition - 1; i <= last_partition - 1; i++) {
+            if (t->opts->appended_partitions[i] == NULL)
+        continue;
+            if (i < t->mbr_req_count)
+                return ISO_BOOT_MBR_COLLISION;
+            if (sa_type == 3) {
+                ret = write_sun_partition_entry(i + 1,
                         t->opts->appended_partitions,
                         t->appended_part_start, t->appended_part_size,
                         ISO_SUN_CYL_SIZE,
                         buf, t->opts->appended_partitions[i][0] == 0);
-        } else {
-            ret = write_mbr_partition_entry(i + 1,
+            } else {
+                ret = write_mbr_partition_entry(i + 1,
                         t->opts->appended_part_types[i],
                         (uint64_t) t->appended_part_start[i],
                         (uint64_t) t->appended_part_size[i],
                         t->partition_secs_per_head, t->partition_heads_per_cyl,
                         buf, 0);
+            }
+            if (ret < 0)
+                return ret;
         }
-        if (ret < 0)
-            return ret;
     }
 
     if (sa_type == 0 && (t->system_area_options & 0x4000) && !do_isohybrid) {
@@ -1860,10 +1899,12 @@ int iso_align_isohybrid(Ecma119Image *t, int flag)
         {ret = ISO_SUCCESS; goto ex;}
     always_align = (t->system_area_options >> 8) & 3;
 
-    /* Take into account the backup GPT */;
-    ret = precompute_gpt(t);
-    if (ret < 0)
-        goto ex;
+    if (!t->gpt_backup_outside) {
+        /* Take into account the backup GPT */;
+        ret = precompute_gpt(t);
+        if (ret < 0)
+            goto ex;
+    }
 
     img_blocks = t->curblock + t->opts->tail_blocks + t->gpt_backup_size;
     imgsize = ((off_t) img_blocks) * (off_t) 2048;
@@ -2137,6 +2178,53 @@ fallback:;
 
 }
 
+int assess_appended_gpt(Ecma119Image *t, int flag)
+{
+    static uint8_t basic_data_uuid[16] = {
+        0xa2, 0xa0, 0xd0, 0xeb, 0xe5, 0xb9, 0x33, 0x44,
+        0x87, 0xc0, 0x68, 0xb6, 0xb7, 0x26, 0x99, 0xc7
+    };
+    static uint8_t efi_sys_uuid[16] = {
+       0x28, 0x73, 0x2a, 0xc1, 0x1f, 0xf8, 0xd2, 0x11,
+       0xba, 0x4b, 0x00, 0xa0, 0xc9, 0x3e, 0xc9, 0x3b
+    };
+    static uint8_t zero_uuid[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
+    int i, ret;
+    uint8_t gpt_name[72], *type_uuid;
+
+#ifndef Libisofs_appended_partitions_inlinE
+    if (!t->gpt_backup_outside)
+        return 2;
+#endif
+
+    /* Represent in GPT only if other GPT partitions are already registered
+       or if appended partitions are explicitely desired for GPT-only.
+    */
+    if (t->gpt_req_count == 0 &&
+        !(t->have_appended_partitions && t->opts->appended_as_gpt))
+        return 2;
+
+    /* Represent appended partitions */
+    for (i = 0; i <= 3; i++) {
+        if (t->opts->appended_partitions[i] == NULL)
+    continue;
+        memset(gpt_name, 0, 72);
+        sprintf((char *) gpt_name, "Appended%d", i + 1);
+        iso_ascii_utf_16le(gpt_name);
+        if (t->opts->appended_part_types[i] == 0xef)
+            type_uuid = efi_sys_uuid;
+        else
+            type_uuid = basic_data_uuid;
+        ret = iso_quick_gpt_entry(t->gpt_req, &(t->gpt_req_count),
+                                  ((uint64_t) t->appended_part_start[i]) * 4,
+                                  ((uint64_t) t->appended_part_size[i]) * 4,
+                                  type_uuid, zero_uuid,
+                                  (uint64_t) 0, gpt_name);
+        if (ret < 0)
+            return ret;
+    }
+    return ISO_SUCCESS;
+}
 
 /* Probably already called by tail_writer_compute_data_blocks via
    iso_align_isohybrid
@@ -2181,6 +2269,9 @@ static int precompute_gpt(Ecma119Image *t)
     if (ret < 0)
         return ret;
 
+    /* Assess impact of appended partitions on GPT */
+    ret = assess_appended_gpt(t, 0);
+
 #ifdef NIX
     /* Disabled */
     
@@ -2262,7 +2353,7 @@ static int precompute_gpt(Ecma119Image *t)
 }
 
 
-static int gpt_tail_writer_compute_data_blocks(IsoImageWriter *writer)
+int gpt_tail_writer_compute_data_blocks(IsoImageWriter *writer)
 {
     Ecma119Image *t;
     int ret;
@@ -2276,15 +2367,22 @@ static int gpt_tail_writer_compute_data_blocks(IsoImageWriter *writer)
         if (ret < 0)
             return ret;
     }
-    t->curblock += t->gpt_backup_size;
-    /* The ISO block number after the backup GPT header */
-    t->gpt_backup_end = t->curblock;
+
+    if (t->gpt_backup_outside) {
+        t->total_size += t->gpt_backup_size * 2048;
+        /* The ISO block number after the backup GPT header */
+        t->gpt_backup_end = t->total_size / 2048;
+    } else {
+        t->curblock += t->gpt_backup_size;
+        /* The ISO block number after the backup GPT header */
+        t->gpt_backup_end = t->curblock;
+    }
 
     return ISO_SUCCESS;
 }
 
 
-static int gpt_tail_writer_write_vol_desc(IsoImageWriter *writer)
+int gpt_tail_writer_write_vol_desc(IsoImageWriter *writer)
 {
     return ISO_SUCCESS;
 }
@@ -2348,6 +2446,12 @@ tampered_head:;
     free(backup_buf);
     if (ret < 0)
         return ret;
+
+    if (!t->gpt_backup_outside) {
+
+        /* >>> Why isn't t->curblock updated ? */;
+
+    }
     return ISO_SUCCESS;
 
 write_zeros:;
@@ -2560,3 +2664,87 @@ int partprepend_writer_create(Ecma119Image *target)
 }
 
 
+#ifdef Libisofs_appended_partitions_inlinE
+
+/* ----------------- Inline Partition Append Writer ------------------ */
+
+
+static int partappend_writer_compute_data_blocks(IsoImageWriter *writer)
+{
+    int ret;
+
+    ret = iso_compute_append_partitions(writer->target, 1);
+    return ret;
+}
+
+
+static int partappend_writer_write_vol_desc(IsoImageWriter *writer)
+{
+    return ISO_SUCCESS;
+}
+
+
+static int partappend_writer_write_data(IsoImageWriter *writer)
+{
+    Ecma119Image *target;
+    int res, first_partition = 1, last_partition = 0, sa_type;
+    int i;
+
+    target = writer->target;
+
+    /* Append partition data */
+    sa_type = (target->system_area_options >> 2) & 0x3f;
+    if (sa_type == 0) { /* MBR */
+        first_partition = 1;
+        last_partition = 4;
+    } else if (sa_type == 3) { /* SUN Disk Label */
+        first_partition = 2;
+        last_partition = 8;
+    }
+    for (i = first_partition - 1; i <= last_partition - 1; i++) {
+        if (target->opts->appended_partitions[i] == NULL)
+    continue;
+        if (target->opts->appended_partitions[i][0] == 0)
+    continue;
+        res = iso_write_partition_file(target,
+                                       target->opts->appended_partitions[i],
+                                       target->appended_part_prepad[i],
+                                       target->appended_part_size[i], 0);
+        if (res < 0)
+            return res;
+        target->curblock += target->appended_part_size[i];
+    }
+    return ISO_SUCCESS;
+}
+
+
+static int partappend_writer_free_data(IsoImageWriter *writer)
+{
+    return ISO_SUCCESS;
+}
+
+
+int partappend_writer_create(Ecma119Image *target)
+{
+    IsoImageWriter *writer;
+
+    writer = calloc(1, sizeof(IsoImageWriter));
+    if (writer == NULL) {
+        return ISO_OUT_OF_MEM;
+    }
+
+    writer->compute_data_blocks = partappend_writer_compute_data_blocks;
+    writer->write_vol_desc = partappend_writer_write_vol_desc;
+    writer->write_data = partappend_writer_write_data;
+    writer->free_data = partappend_writer_free_data;
+    writer->data = NULL;
+    writer->target = target;
+
+    /* add this writer to image */
+    target->writers[target->nwriters++] = writer;
+
+    return ISO_SUCCESS;
+}
+
+#endif /* Libisofs_appended_partitions_inlinE */
+

libisofs/system_area.h

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2008 Vreixo Formoso
- * Copyright (c) 2012 Thomas Schmitt
+ * Copyright (c) 2012 - 2015 Thomas Schmitt
  *
  * This file is part of the libisofs project; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License version 2 
@@ -281,10 +281,20 @@ struct iso_sun_disk_label_entry {
 */
 int partprepend_writer_create(Ecma119Image *target);
 
+/* Creates the Inline Partition Append Writer
+*/
+int partappend_writer_create(Ecma119Image *target);
+
 /* Creates the GPT backup tail writer.
 */
 int gpt_tail_writer_create(Ecma119Image *target);
 
+/* Not for execution but only to identify the writer by
+    ( writer->write_vol_desc == gpt_tail_writer_write_vol_desc )
+*/
+int gpt_tail_writer_write_vol_desc(IsoImageWriter *writer);
+
+
 /* Only for up to 36 characters ISO-8859-1 (or ASCII) input */
 void iso_ascii_utf_16le(uint8_t gap_name[72]);
 
@@ -301,4 +311,10 @@ void iso_ascii_utf_16le(uint8_t gap_name[72]);
 #define Libisofs_grub2_sparc_patch_adr_poS    0x228
 #define Libisofs_grub2_sparc_patch_size_poS   0x230    
 
+
+/* >>> It is unclear whether there is a use case for appended partitions
+       inside the ISO filesystem range. 
+ # define Libisofs_appended_partitions_inlinE yes
+*/
+
 #endif /* SYSTEM_AREA_H_ */