EmbLogic » arjita.e1 https://www.emblogic.com/blog Embedded System and ARM Training Tue, 03 Mar 2020 13:00:06 +0000 en-US hourly 1 http://wordpress.org/?v=3.9.1 algo for open function https://www.emblogic.com/blog/09/algo-for-open-a-device/ https://www.emblogic.com/blog/09/algo-for-open-a-device/#comments Fri, 24 Sep 2010 12:28:20 +0000 http://emblogic.org/blog/?p=141 Continue reading →]]> 1: define a local device.

2: fetch minor no.

2.a: check for errors.

3: assign previously allocated scull_dev to a local scull_dev.

3.a: check for errors.

3.b: cleanup_module();(if minor no. is wrong)

4: check file open in write mode by && O_ACCMOD with flags.

4.a: truncate the file.

5: preserve the local device into scull_dev.

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