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/etc/functions: fix detection of virtual flash drive in qemu.

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Adds check to detect device formatted as fat32 without partition table.

With fat32 fdisk does not print message about invalid partition table
and instead it'll print an empty table with header.
In both cases total output has the same length of 5 lines: 3 about
device info, 1 empty line and the 5th will be the table header or
invalid partition message.

Signed-off-by: Daniel Pineda <daniel.pineda@puri.sm>
This commit is contained in:
Daniel Pineda 2023-01-17 14:24:11 -06:00
parent e45980d33f
commit 3cd8654566
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GPG Key ID: 902C199C68C4B327
1 changed files with 10 additions and 1 deletions
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11
initrd/etc/functions
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@ -155,7 +155,16 @@ list_usb_storage()
# never usable directly, and this allows the "wait for
# disks" loop in mount-usb to correctly wait for the
# partitions.
if fdisk -l "$b" | grep -q "doesn't contain a valid partition table"; then
# This check: [ $(fdisk -l "$b" | wc -l) -eq 5 ]
# covers the case of a device without partition table but
# formatted as fat32, which contains a sortof partition table.
# this causes fdisk to not print the invalid partition table
# message and instead it'll print an empty table with header.
# In both cases the output is 5 lines: 3 about device info,
# 1 empty line and the 5th will be the table header or the
# unvalid message.
DISK_DATA=$(fdisk -l "$b")
if echo "$DISK_DATA" | grep -q "doesn't contain a valid partition table" || [ $(echo "$DISK_DATA" | wc -l) -eq 5 ]; then
# No partition table, include this device
echo "$b"
else