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Betwen script race condition and C binary

I have a C program that writes data to a file.

Program C does not keep the file open at run time, it simply opens the file with fopen ("myfile.txt","a")) and writes some data, and then closes the file.

On the other hand, I have a script file that can simultaneously perform 2 actions in a single file using a binary C program:

  • He can delete the file

  • he can add some lines to the file using the command

    echo "some data" >> file

Is there a risk of the state of the betwen script race and the C binary program? Can Linux ioctl handle this problem?

If there is a risk of race conditions, how to check in C and shell before processing the file?

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