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https://github.com/cirosantilli/linux-kernel-module-cheat.git
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28 lines
537 B
Bash
Executable File
28 lines
537 B
Bash
Executable File
#!/bin/sh
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set -e
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f=/sys/kernel/debug/lkmc_dep
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f2=/sys/kernel/debug/lkmc_dep2
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insmod dep.ko
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insmod dep2.ko
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# Initial value.
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[ "$(cat "$f")" = 0 ]
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# Changhing dep2 also changes dep.
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printf 1 > "$f2"
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[ "$(cat "$f")" = 1 ]
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# Changhing dep also changes dep2.
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printf 2 > "$f"
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[ "$(cat "$f2")" = 2 ]
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# sysfs shows us that the module has dependants.
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[ "$(cat /sys/module/dep/refcnt)" = 1 ]
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[ "$(ls /sys/module/dep/holders)" = dep2 ]
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rmmod dep2.ko
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[ "$(cat /sys/module/dep/refcnt)" = 0 ]
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[ -z "$(ls /sys/module/dep/holders)" ]
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rmmod dep.ko
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