Labview Linux, embedded PC!

[Bichillo]

I am working using Labview over Linux, and my problem is that I was using the Open File function(deny write/read) to control when someone was writing or reading the file.
But this function doesn work in Linux, although you canb open a file one hundred times that this function doesn't give an error, if you do this in Windows this fucntion works properly!
So to control if someone is using a file I have different options:
-Using semaphores. It is not a good solution becuase the processes that are using the file are independent, and I don know what kind of variable I can use to comunicate each other.
- Using a flag file. It is not a good option because I am using a embedded pc and the flash has a limited numbers of writing, so I must avoid wr
ite!

Do you have other solution?

Thanks in advanced!

Graci

[chrisger]

hi Graci,
first you can try to use the "Lock range" - function, maybe it works under embedded linux (see attachment). another solution could be to bundle all file-operations into one single vi, which stores the current owner of the file in a unitialized shift-register and inhibits all other accesses (will work only if ALL processes can use this one VI).

greetings
chris

[Kevin Valentine]

Hi Graci,

Me again. Could you attach a sample of your program?