open function with O_WRONLY in iPod?

vishal.chauhan · 10-16-2007, 12:59 AM

Hi All,

I m workin on MAC Intel having Os 10.4.10.

I have an application in which i m opening the ipod with its name as /dev/rdisk2 and open it in O_WRONLY mode.

But actually it return -1 while opening in write mode but if i open it in read mode then it is working.

If any one knows how I can open it in my application with O_WRONLY then plz help me out.

Thanks.

robinwmills · 10-16-2007, 02:01 PM

Vishal

I'm surprised by this. I don't write to /dev/xxx, I write to /Volumes/<nameofipod>. In fact I have an alias /iPod -> /Volumes/<nameofipod> and then in terminal, I can do:

cd /iPod/Notes
ls -alt ~ > ls.txt
.... ya ya ya ...

All terminal programs seem to be able to read and write to my iPod with my own code. Although I'm using a PowerBook G4 (PPC), I doubt if there's a significant difference between the PPC and the Intel Macs which would causes difficulties. And my code uses fopen("kdkdkd","w") - however I believe the implementation of fopen uses the O_xxxx stuff to which you refer. I'm even delighted to mention that myTouch also works fine! (so I can set the dates correctly).

Have you tried to see if you can write to the iPod. For example:

cd ~
ls -alt > /Volumes/<ipodname>/Notes/myLs.txt

and see if the file in there. Hope that helps.

Robin

vishal.chauhan · 10-16-2007, 11:36 PM

Hi Robin

Actually I m using /dev/rdisk because I doesnot want always to write a file to Ipod . sometime i just want to write 00 to a file .

10-16-2007, 12:59 AM	#1
vishal.chauhan Triple-A Player Join Date: Jan 2007 Posts: 65	open function with O_WRONLY in iPod? Hi All, I m workin on MAC Intel having Os 10.4.10. I have an application in which i m opening the ipod with its name as /dev/rdisk2 and open it in O_WRONLY mode. But actually it return -1 while opening in write mode but if i open it in read mode then it is working. If any one knows how I can open it in my application with O_WRONLY then plz help me out. Thanks.

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10-16-2007, 02:01 PM	#2
robinwmills Major Leaguer Join Date: Sep 2007 Location: San Jose, CA, USA. Posts: 290	Vishal I'm surprised by this. I don't write to /dev/xxx, I write to /Volumes/<nameofipod>. In fact I have an alias /iPod -> /Volumes/<nameofipod> and then in terminal, I can do: cd /iPod/Notes ls -alt ~ > ls.txt .... ya ya ya ... All terminal programs seem to be able to read and write to my iPod with my own code. Although I'm using a PowerBook G4 (PPC), I doubt if there's a significant difference between the PPC and the Intel Macs which would causes difficulties. And my code uses fopen("kdkdkd","w") - however I believe the implementation of fopen uses the O_xxxx stuff to which you refer. I'm even delighted to mention that myTouch also works fine! (so I can set the dates correctly). Have you tried to see if you can write to the iPod. For example: cd ~ ls -alt > /Volumes/<ipodname>/Notes/myLs.txt and see if the file in there. Hope that helps. Robin

10-16-2007, 11:36 PM	#3
vishal.chauhan Triple-A Player Join Date: Jan 2007 Posts: 65	Hi Robin Actually I m using /dev/rdisk because I doesnot want always to write a file to Ipod . sometime i just want to write 00 to a file .