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Is close command required in nbus.c example in TS-7600 User Manual?

Hi,


I am using GPIO inputs on a TS-7600. In the user manual there is a link to  nbus.c (https://files.embeddedarm.com/ts-arm-sbc/ts-7600-linux/sources/nbus.c).

Line 248 has the open command:

devmem = open("/dev/mem", O_RDWR|O_SYNC);


I can't find a corresponding "close" command. Is it automatically taken care of when devmem goes out of scope? Or should there be a "close" command somewhere?


Thank you.

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