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kdump-lib.sh: Check the output of blkid with sed instead of eval

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Previously the output of blkid is not checked. If the output
is empty, the eval will report the following error message:

    /lib/kdump/kdump-lib.sh: eval: line 925: syntax error near unexpected token `;'
    /lib/kdump/kdump-lib.sh: eval: line 925: `; echo $TYPE'

For example, we can observe such a failing when blkid is invoked
against a lvm thinpool block device:

    $ blkid -u filesystem,crypto -o export -- "/dev/block/253\:2"
    $ echo $?
    2
    $ udevadm info /dev/block/253\:2|grep S\:
    S: mapper/vg00-thinpoll_tmeta

In this patch, we will use sed instead of eval, to output the
fstype of block device if any.

Signed-off-by: Tao Liu <ltao@redhat.com>
Reviewed-by: Philipp Rudo <prudo@redhat.com>
This commit is contained in:
Tao Liu 2022-02-16 14:26:38 +08:00 committed by Coiby Xu
parent 59fcb8ae5b
commit 2bbc7512a2
1 changed files with 2 additions and 1 deletions
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kdump-lib.sh
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@ -885,7 +885,8 @@ get_luks_crypt_dev()
[[ -b /dev/block/$1 ]] || return 1
_type=$(eval "$(blkid -u filesystem,crypto -o export -- "/dev/block/$1"); echo \$TYPE")
_type=$(blkid -u filesystem,crypto -o export -- "/dev/block/$1" | \
sed -n -E "s/^TYPE=(.*)$/\1/p")
[[ $_type == "crypto_LUKS" ]] && echo "$1"
for _x in "/sys/dev/block/$1/slaves/"*; do