ramoops: avoid deleting root

Add checking that the optional_path is provided so that root
cannot be deleted. Also, fix all the shellcheck errors and
reformat with beautysh.

Fixes openbmc/phosphor-

ramoops: avoid deleting root

Add checking that the optional_path is provided so that root
cannot be deleted. Also, fix all the shellcheck errors and
reformat with beautysh.

Fixes openbmc/phosphor-debug-collector#24.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I1fd4d0693443e54045b29efb3b92da770eb2933a

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Collect ramoops data into BMC dump

- Add ramoops file monitor and support to enable ramoops data
collection for kernel dump.

- Systemd will collect ramoops data and write it i

Collect ramoops data into BMC dump

- Add ramoops file monitor and support to enable ramoops data
collection for kernel dump.

- Systemd will collect ramoops data and write it into
/var/lib/systemd/pstore when a system kernel oops/panics.

- Today, need to grab everything in that directory, put it in a dump
and then delete everything in that directory.

Tested:
- Simulate a kernel panic by creating similar data in the expected
location.
`dmesg > /var/lib/systemd/pstore/dmesg1.txt`
`dmesg > /var/lib/systemd/pstore/dmesg2.txt`
`dmesg > /var/lib/systemd/pstore/dmesg3.txt`
`dmesg > /var/lib/systemd/pstore/dmesg4.txt`

tar -tvf obmcdump_1_248.tar.xz:

drwxr-xr-x 0/0 0 1970-01-01 00:01:32 obmcdump_1_248/
-rw-r--r-- 0/0 21239 1970-01-01 00:01:32 obmcdump_1_248/dmesg1.txt
-rw-r--r-- 0/0 21239 1970-01-01 00:01:32 obmcdump_1_248/dmesg2.txt
-rw-r--r-- 0/0 21239 1970-01-01 00:01:32 obmcdump_1_248/dmesg3.txt
-rw-r--r-- 0/0 21239 1970-01-01 00:01:32 obmcdump_1_248/dmesg4.txt
-rw-r--r-- 0/0 162 1970-01-01 00:01:32 obmcdump_1_248/dreport.log
-rw-r--r-- 0/0 294 1970-01-01 00:01:31 obmcdump_1_248/os-release
-rw-r--r-- 0/0 278 1970-01-01 00:01:31 obmcdump_1_248/summary.log

Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: I05bca408f4dcc2b62350104a0c5f757d740dde22

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