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fops: sh -x is fun

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Ciro Santilli
2018-06-29 10:47:35 +01:00
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README.adoc
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@@ -3010,6 +3010,14 @@ Sources:
* link:kernel_module/fops.c[]
* link:rootfs_overlay/fops.sh[]
Then give this a try:
....
sh -x /fops.sh
....
We have put printks on each fop, so this allows you to see which system calls are being made for each command.
File operations is the main method of userland driver communication.
`struct file_operations` determines what the kernel will do on filesystem system calls of <<pseudo-filesystems>>.