MottS Posted March 6, 2003 Report Share Posted March 6, 2003 Hi I'm trying to add a file to a .iso image. I mounted it with mount -t iso9660 -o loop -rw /path/to/image.iso /mnt/Iso But I get the following when trying to move a file in it.. look: root@localhost Distro # cp atk-1.2.2.tar.bz2 /mnt/Iso cp: cannot create regular file `/mnt/Iso/atk-1.2.2.tar.bz2': Read-only file system How could I write in it? Thx MOttS Quote Link to comment Share on other sites More sharing options...
Cannonfodder Posted March 6, 2003 Report Share Posted March 6, 2003 For what I've read, the iso9660 doesn't support a write mode. It used to way back in older kernels. I'm not 100% positive though, there may be a way.. An alternative is to mount the loop, cp the files to a rw file system and then make a new iso based on that.. more work but will work.. Quote Link to comment Share on other sites More sharing options...
MottS Posted March 6, 2003 Author Report Share Posted March 6, 2003 Thx for the reply cannonfodder. An alternative is to mount the loop, cp the files to a rw file system and then make a new iso based on that.. more work but will work.. I already tried that but I don't get the same md5sum. Let me show you what I did: gd@localhost Distro $ mount -t iso9660 -o loop MandrakeLinux-9.1rc2-CD1.i586.iso /mnt/cd1 gd@localhost Distro $ mkdir cd1 gd@localhost Distro $ cp -a /mnt/cd1/ cd1 gd@localhost Distro $ mkisofs -RJ -o cd1.iso cd1/cd1 gd@localhost Distro $ md5sum MandrakeLinux-9.1rc2-CD1.i586.iso cd1.iso 342862f7a2da34b6d9d772d6bdf91b4d MandrakeLinux-9.1rc2-CD1.i586.iso 292c3a1384787cccc6b6e1c64ad1a7f1 cd1.iso gd@localhost Distro # ls -l ... -rwxrwxrwx 1 root root 682131456 Mar 4 10:51 MandrakeLinux-9.1rc2-CD1.i586.iso -rwxrwxrwx 1 root root 682131456 Mar 5 10:32 cd1.iso ... In real words I mounted the image, copy the stuff of that image into a dir and made an image of that dir. However, even though the image size of the images are the same, their md5sum aren't. There must be some stuff that haven't been copied into cd1 dir... What am i missing here ? Is IsoBuster in windows can modify iso images btw ? MOttS Quote Link to comment Share on other sites More sharing options...
Cannonfodder Posted March 6, 2003 Report Share Posted March 6, 2003 There is a nohide option mentioned in the man mount although I'm not sure how to use it. Maybe there are some hidden files. Another possibility is that you are making your iso differently than they did (perhaps different options) that alters the final contents. The real question is are the the same byte for byte. In terms of size, they seem to have the same number of bytes.. Must be a way to compare two directories byte by byte and list differences (diff?) Quote Link to comment Share on other sites More sharing options...
qnr Posted March 6, 2003 Report Share Posted March 6, 2003 same size wouldn't make a bit of difference in the md5sum actually, you can check with something like this: terry@linux:/home/terry$ touch a.txt b.text; echo "a" > a.txt; echo "b" > b.txt terry@linux:/home/terry$ root@linux:/home/terry# md5sum a.txt b.txt 60b725f10c9c85c70d97880dfe8191b3 a.txt 3b5d5c3712955042212316173ccf37be b.txt and you would use diff: terry@linux:/home/terry$ diff a.txt b.txt 1c1 < a --- > b This is from The Linux Cookbook: 9.4.2 Finding the Differences between Files Use diff to compare two files and output a difference report (sometimes called a "diff") containing the text that differs between two files. The difference report is formatted so that other tools (namely, patch---see section Patching a File with a Difference Report) can use it to make a file identical to the one it was compared with. To compare two files and output a difference report, give their names as arguments to diff. * To compare the files `manuscript.old' and `manuscript.new', type: $ diff manuscript.old manuscript.new RET The difference report is output to standard output; to save it to a file, redirect the output to the file to save to: $ diff manuscript.old manuscript.new > manuscript.diff RET In the preceding example, the difference report is saved to a file called `manuscript.diff'. The difference report is meant to be used with commands such as patch, in order to apply the differences to a file. See Info file `diff.info', node `Top', for more information on diff and the format of its output. To better see the difference between two files, use sdiff instead of diff; instead of giving a difference report, it outputs the files in two columns, side by side, separated by spaces. Lines that differ in the files are separated by `|'; lines that appear only in the first file end with a `<', and lines that appear only in the second file are preceded with a `>'. * To peruse the files `laurel' and `hardy' side by side on the screen, with any differences indicated between columns, type: $ sdiff laurel hardy | less RET To output the difference between three separate files, use diff3. * To output a difference report for files `larry', `curly', and `moe', and output it in a file called `stooges', type: $ diff3 larry curly moe > stooges RET There is also cmp: terry@linux:/home/terry$ cmp a.txt b.txt a.txt b.txt differ: byte 1, line 1 Quote Link to comment Share on other sites More sharing options...
MottS Posted March 6, 2003 Author Report Share Posted March 6, 2003 Hey ! Thank you much guys.. I'm gonna try the 'diff' command tonight with some other options to make an iso out of the copied directory. I'm just trying to add a file to an iso image!!! wtf!!! I remember having done that with IsoBuster in my windows days.. or was I too drunk ? :) anyway MOttS Quote Link to comment Share on other sites More sharing options...
Cannonfodder Posted March 7, 2003 Report Share Posted March 7, 2003 It may be that you are doing it right. The checksums may not be what you think but it doesn't mean you are doing it wrong. Quote Link to comment Share on other sites More sharing options...
aRTee Posted March 7, 2003 Report Share Posted March 7, 2003 About the images not having the same checksum: did you put the same title and other info in the .iso that you made? If not, sure it's different; they don't have the exact same info. Mandrake puts something like: Mandrake cd x and some other stuff in the publisher/edition headers of the iso. Use for instance gcombust to read the iso info ('read info' after selecting the iso)... Quote Link to comment Share on other sites More sharing options...
MottS Posted March 8, 2003 Author Report Share Posted March 8, 2003 Well thanks guys.. I finally by-pass the problem. I wanted to add 2 folders (RPM2 and RPM3) to iso #1 of MDK 9.1RC2 so that I could install form the hard drive only with that image. I needed to do that because the MDK installed does not ask for the path of the other iso image when we install from the hard drive. It only ask for the path of the first iso and we can't use the other 2. So I did a minimum install (about 175 MB of stuff is installed .. IceWM included) and everything went well.. no package error or other. Once rebooted into IceWM I mounted the three images, modified fstab and urpmi. I've then be able to install other packages from cd2 and 3. aRTee, I was not using any GUI.. plain 'mount' and 'mkisofs'. I never used gcombust. I'm still thinking we can write to iso images in windows with IsoBuster. Sad I don't have access to a win box so that I can check.... Anyone ? MOttS Quote Link to comment Share on other sites More sharing options...
aRTee Posted March 8, 2003 Report Share Posted March 8, 2003 aRTee, I was not using any GUI.. plain 'mount' and 'mkisofs'. I never used gcombust. Wisea$$! ;) Ok, command line cowboys, in that case: try a man mkisofs, and check for the -A switch: -A application_id Specifies a text string that will be written into the volume header. This should describe the application that will be on the disc. There is space on the disc for 128 characters of information. This parameter can also be set in the file .mkisofsrc with APPI=id. If specified in both places, the com- mand line version is used. Did you use this, with the correct info that was in the original iso? Quote Link to comment Share on other sites More sharing options...
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