27 lines
1.4 KiB
Bash
27 lines
1.4 KiB
Bash
# Every driver between the root filesystem's disk and the bus it hangs off.
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root_drivers() {
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local src disk p
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src=$(findmnt -n -o SOURCE / | sed 's/\[.*//')
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disk=$(lsblk -nspo NAME "$src" | tail -n1)
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p=$(readlink -f "/sys/class/block/${disk##*/}/device")
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while [ -n "$p" ] && [ "$p" != /sys/devices ] && [ "$p" != / ]; do
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[ -e "$p/driver" ] && basename "$(readlink -f "$p/driver")"
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p=${p%/*}
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done
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}
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task 1 "The license of the xfs module"
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need "/root/lab-answers/1 has xfs's license, $(modinfo -F license xfs 2>/dev/null)" '[ "$(answer 1)" = "$(modinfo -F license xfs | tr A-Z a-z)" ]'
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task 2 "dummy loaded with numdummies=3, then unloaded" self
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task 3 "dummy loads at every boot with one device"
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need "dummy is set to load at boot" '
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cat /etc/modules-load.d/*.conf /run/modules-load.d/*.conf /usr/lib/modules-load.d/*.conf /etc/modules 2>/dev/null | grep -Eq "^[[:space:]]*dummy[[:space:]]*$"'
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need "modprobe gives dummy numdummies=1 (the last setting wins)" 'modprobe --show-depends dummy 2>/dev/null | grep -o "numdummies=[0-9]*" | tail -n1 | grep -qx numdummies=1'
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need "the dummy module is loaded" '[ -d /sys/module/dummy ]'
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need "ip -br link show type dummy shows one device" '[ "$(ip -br link show type dummy | wc -l)" = 1 ]'
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task 4 "The root disk's driver"
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need "/root/lab-answers/4 names a driver of the root disk ($(root_drivers | head -n1))" '[ -n "$(answer 4)" ] && root_drivers | grep -qxF "$(answer 4 | tr - _)"'
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