CmdLine - file /proc/cmdline

This parser reads the /proc/cmdline file, which contains the arguments given to the currently running kernel on boot.

class insights.parsers.cmdline.CmdLine(context)[source]

Bases: LegacyItemAccess, Parser

A parser class for parsing the Linux kernel command line as given in /proc/cmdline.

Parsing Logic:

Parses all elements in command line to a dict where the key is the
element itself and the value is a list stores its corresponding values.

If an element doesn't contain "=", set the corresponding value to `True`.

If an element contains "=", set the corresponding value to the whole right
value of the "=".

Note

For special command line elements that include two “=”, e.g. root=LABEL=/1, “root” will be the key and “LABEL=/1” will be the value in the returned list.

Some parameters (the returned keys) might be still effective even if there is ‘#’ before it, e.g.: #rhgb. This should be checked by the rule.

Sample input:

BOOT_IMAGE=/vmlinuz-3.10.0-327.36.3.el7.x86_64 root=/dev/system_vg/Root ro rd.lvm.lv=system_vg/Root crashkernel=auto rd.lvm.lv=system_vg/Swap rhgb quiet LANG=en_GB.utf8

Examples

>>> cmd['BOOT_IMAGE']
['/vmlinuz-3.10.0-327.36.3.el7.x86_64']
>>> cmd['rd.lvm.lv']
['system_vg/Root', 'system_vg/Swap']
>>> 'autofs' in cmd
False
>>> cmd.get('autofs') is None
True
>>> 'quiet' in cmd
True
>>> cmd.get('quiet')
[True]
>>> cmd['crashkernel']
['auto']
data

Parsed booting arguments are stored in this dictionary

Type

dict

cmdline

The RAW line of the /proc/cmdline

Type

str

parse_content(content)[source]

This method must be implemented by classes based on this class.