Small adjustments about -boot_image
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@ -1369,18 +1369,18 @@ ISOLINUX wiki.
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The support for other boot image types is sparse.
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.br
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Typically a BIOS will load an El Torito object from the first session on media
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and not from the last one, which gets mounted by default. This makes no
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problems with overwriteable media, because they appear to inadverted readers
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as one single session.
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Contrary to published specifications many BIOSes will load an El Torito
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object from the first session on media and not from the last one, which
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gets mounted by default. This makes no problems with overwriteable media,
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because they appear to inadverted readers as one single session.
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.br
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With multi-session media CD-R[W], DVD-R[W], DVD+R, this implies that the whole
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bootable system has to reside already in the first session and that the last
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session still has to bear all files which the booted system expects after
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eventually mounting the ISO image.
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.br
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If ISOLINUX is known to be present on appendable media then it is advised
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to patch it when a new session gets written. But one should not rely on the
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If ISOLINUX is known to be present on media then it is advised to patch it
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when a follow-up session gets written. But one should not rely on the
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capability to influence the bootability of the existing sessions, unless one
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can assume overwriteable media.
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.TP
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@ -1414,7 +1414,7 @@ this may have few effect at boot time. See above.
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.br
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The ISOLINUX files have to be added to the ISO image by normal means
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(image loading, -map, -add, ...) and should reside either in ISO image
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directory /isolinux or /boot/isolinux .
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directory /isolinux or in /boot/isolinux .
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In that case it suffices to use as bootspec the text "dir=/isolinux" or
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"dir=/boot/isolinux". E.g.:
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.br
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@ -1 +1 @@
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#define Xorriso_timestamP "2008.09.30.102753"
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#define Xorriso_timestamP "2008.09.30.174925"
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@ -952,6 +952,13 @@ int Xorriso_write_session(struct XorrisO *xorriso, int flag)
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strcpy(cpt, "boot.cat");
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}
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sprintf(xorriso->info_text, "Activating alleged isolinux boot image %s",
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Text_shellsafe(xorriso->boot_image_bin_path, sfe, 0));
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Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "NOTE", 0);
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sprintf(xorriso->info_text, "Creating El Torito boot catalog file %s",
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Text_shellsafe(xorriso->boot_image_cat_path, sfe, 0));
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Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "NOTE", 0);
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ret= Xorriso_node_from_path(xorriso, image, xorriso->boot_image_bin_path,
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&node, 1);
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if(ret <= 0) {
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@ -6766,48 +6773,12 @@ int Xorriso_burn_track(struct XorrisO *xorriso, off_t write_start_address,
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ret= 0; goto ex;
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}
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#ifndef NIX
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if(flag & 1) {
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ret= Xorriso_update_iso_lba0(xorriso, nwa, isosize, head_buffer, NULL,
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flag & 2);
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if(ret <= 0)
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goto ex;
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}
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#else
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/* Update ISO header at lba 0 */
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if((flag&1) && nwa >= 32) {
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if(!do_isosize) {
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/* head_buffer was not filled yet. Read it from output media. */
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ret= isoburn_read_iso_head(drive, nwa, &isosize, head_buffer, 2);
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if(ret<=0) {
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Xorriso_process_msg_queues(xorriso,0);
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sprintf(xorriso->info_text,
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"Cannot read freshly written ISO image head");
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Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "FAILURE", 0);
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ret= 0; goto ex;
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}
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}
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/* patch ISO header */
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full_size= nwa + isosize;
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headpt= head_buffer + 32*1024;
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for(i=0;i<4;i++)
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headpt[87-i]= headpt[80+i]= (full_size >> (8*i)) & 0xff;
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ret= burn_random_access_write(drive, (off_t) 0, head_buffer,
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(off_t) (64*1024), 1);
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if(ret<=0) {
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Xorriso_process_msg_queues(xorriso,0);
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sprintf(xorriso->info_text,
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"Cannot write new ISO image head to LBA 0");
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Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "FAILURE", 0);
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ret= 0; goto ex;
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}
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}
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#endif /* NIX */
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sprintf(xorriso->info_text, "Writing to %s completed sucessfully.\n\n",
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Text_shellsafe(xorriso->outdev,sfe,0));
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Xorriso_info(xorriso, 0);
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