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https://github.com/cirosantilli/linux-kernel-module-cheat.git
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23 lines
509 B
Bash
Executable File
23 lines
509 B
Bash
Executable File
#!/bin/sh
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set -ex
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d=/debugfs
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mkdir -p "$d"
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# We also added a fstab entry that mounts this under /sys/kernel/debug autmoatically.
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# That is the most common place to mount it.
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# The /sys/kernel/debug directory gets created automatically when debugfs is
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# compiled into the kernel, but it does not get mounted automatically.
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mount -t debugfs none /debugfs
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insmod /debugfs.ko
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cd "${d}/lkmc_debugfs"
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cat myfile
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# => 42
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echo 13 > myfile
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cat myfile
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# => 13
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echo 666 > "${d}/lkmc_debugfs_file"
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cat myfile
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# => 666
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