Ferass El Hafidi
ceb1d85e82
See previous initramfs commit message for reasoning. Signed-off-by: Ferass El Hafidi <funderscore@postmarketos.org> Part-of: <https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/8573>
67 lines
2.2 KiB
Bash
67 lines
2.2 KiB
Bash
#!/bin/sh
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set -e
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# Read ESP UUID from EFI variable
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mount -t efivarfs efivarfs /sys/firmware/efi/efivars 2>/dev/null || true
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efi_var="$(find /sys/firmware/efi/efivars -name 'LoaderDevicePartUUID-*' 2>/dev/null | head -n1)"
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if [ ! -e "$efi_var" ]; then
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echo "ERROR: LoaderDevicePartUUID EFI variable not found"
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exit 1
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fi
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esp_uuid="$(dd if="$efi_var" bs=1 skip=4 2>/dev/null | tr -d '\0' | tr '[:upper:]' '[:lower:]')"
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if [ -z "$esp_uuid" ]; then
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echo "ERROR: Failed to read ESP UUID from EFI variable"
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exit 1
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fi
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echo "ESP UUID from EFI: $esp_uuid"
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losetup_args="-Pf --show --direct-io=on"
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attempt_start="$(cut -d. -f1 /proc/uptime)"
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wait_seconds=10
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echo "Scanning for subpartition container (timeout: ${wait_seconds}s)..."
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while true; do
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if [ -b "/dev/disk/by-partuuid/$esp_uuid" ]; then
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echo "ESP partition already visible, no subpartition mounting needed"
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exit 0
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fi
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for dev in /sys/class/block/*/partition; do
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[ -e "$dev" ] || continue
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partition="/dev/$(basename "$(dirname "$dev")")"
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[ -b "$partition" ] || continue
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if sfdisk --dump "$partition" 2>/dev/null | grep -qi "$esp_uuid"; then
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sector_size="$(lsblk -ndo PHY-SEC "$partition" 2>/dev/null)"
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if [ -n "$sector_size" ]; then
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# not strictly required if it's 512 (the default for losetup)
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# but doing this anyways saves us from a potentially risky
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# numerical comparison to a parsed string value
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losetup_args="$losetup_args --sector-size $sector_size"
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fi
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echo "Found subpartition container: $partition"
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# shellcheck disable=SC2086
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loop_dev="$(losetup $losetup_args "$partition")"
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if [ -z "$loop_dev" ]; then
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echo "ERROR: losetup failed for $partition"
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exit 1
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fi
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echo "Mounted subpartitions via $loop_dev"
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exit 0
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fi
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done
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now="$(cut -d. -f1 /proc/uptime)"
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if [ "$now" -ge $(( attempt_start + wait_seconds )) ]; then
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echo "ERROR: subpartition container not found after ${wait_seconds}s"
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exit 1
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fi
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sleep 0.1
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done
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