Re: [Crash-utility] RFE: run crash in "help mode"
----- Original Message -----
Hi,
Sometimes it is useful to not clutter up my active screen and run
crash in another window so I can examine "help mod" and type the
command in the real session. That, or extract all the help
text into a .texi doc? Something, please, anyway....
Thank you!
Regards, Bruce
example usage:
$ crash --help-mode
crash-help-for>
Bruce,
Here's what's available:
To see a command's help page without invoking a crash session,
use "crash -h" or "--help", as described in the man page:
$ man crash
... [ cut ] ...
-h [option]
--help [option]
Without an option argument, display a crash usage help message.
If the option argument is a crash command name, the help page
for that command is displayed. If it is the string "input", a
page describing the various crash command line input options is
displayed. If it is the string "output", a page describing com-
mand line output options is displayed. After the help message
is displayed, crash exits.
...
So for the "mod" command:
$ crash -h mod
NAME
mod - module information and loading of symbols and debugging data
SYNOPSIS
mod -s module [objfile] | -d module | -S [directory] | -D | -r | -R | -o | -g
DESCRIPTION
With no arguments, this command displays basic information of the currently
installed modules, consisting of the module address, name, size, the
object file name (if known), and whether the module was compiled with
CONFIG_KALLSYMS.
...
And although it's undocumented, you can get a complete dump of all pages
by entering "crash -h all".
Alternatively, if you've got a browser window open, go to the "Builtin
Help"
page of the crash whitepaper, and just click on the command you're
interested in:
http://people.redhat.com/anderson/crash_whitepaper/#HELP
Dave Anderson