Creating .dmg images from the shell

[iceman22]

I have written a PHP script I run using cron, which takes arguments as files or directories to back up to an FTP server.

The script takes the args and executes the shell command hdiutil to make a compressed, encrypted image.

It works great, except that I currently get this error:

hdiutil: WARNING: -passphrase has been deprecated in favor of -stdinpass

When using this shell command within the script:

hdiutil create -srcfolder $source -encryption -passphrase $password -fs HFS+ -volname $vol_name $img_name

I haven't been able to enter a password using stdin either from the shell, is it even possible to use -stdinpass in a CGI?

 

[Bear]

...
I haven't been able to enter a password using stdin either from the shell, is it even possible to use -stdinpass in a CGI?

From a Terminal window, you need a null character (^@) at the end of your passphrase and on the next line a control-D (^d). Without the null, it doesn't work.

As for using it within a cgi, yes it can be done, you would need to write the null terminated password to a file (no control-D should be needed as all that does is indicate end of file) and run hdiutil redirecting stdin to be from the file.

 

[iceman22]

Would you mind providing an example of how it could be done in a CGI?

I have tried entering a passphrase followed by a '^@' and was unsuccessful in the terminal. I just tried again and the passphrases didn't match, even when I was copying exactly what I had typed into the shell window that was still open, excluding the NULL char of course.

 

[iceman22]

I successfully created an image from the shell, using (^@), rather than literally typing caret-@, which did not work.

I can't do ctrl-@ in a text file or in the script, only caret-@, I have tried using "password^@","password\0","password" and a few others.

In the script, this is what I have tried using:
`cat /password.txt | hdiutil create -srcfolder $source -encryption -stdinpass -fs HFS+ -volname $vol_name $img_name`
`echo "$password^@" | hdiutil create -srcfolder $source -encryption -stdinpass -fs HFS+ -volname $vol_name $img_name`

 

[iceman22]

I got it work, there is no need for a NULL terminating character or using an external file. The fact that echo was adding a \n by default is what was killing me.

This works fine:
`echo -n $password | hdiutil create -srcfolder $source -encryption -stdinpass -fs HFS+ -volname $vol_name $img_name`;

 

[anurag1005]

Issue while creating dmg with shell script

Hi,

I am using same command in shell script to create a dmg file but after creation I am not able to open the dmg with same password. If I am creating the dmg from command line it works fine.

echo -n abcd1234|hdiutil create -srcfolder my_folder -encryption -stdinpass -debug my_folder.dmg