wsh commands
Simply typing help in the wsh interpreter displays the following help
> help
[Shell commands]
help, quit, exit, shell, exec, clear
[Functions]
+ basic:
help(), man()
+ memory display:
hexdump(), hex_dump(), hex()
+ memory maps:
shdrs(), phdrs(), map(), procmap(), bfmap()
+ symbols:
symbols(), functions(), objects(), info(), search(), headers()
+ memory search:
grep(), grepptr()
+ load libaries:
loadbin(), libs(), entrypoints(), rescan()
+ code execution:
libcall()
+ buffer manipulation:
xalloc(), ralloc(), xfree(), balloc(), bset(), bget(), rdstr(), rdnum()
+ control flow:
breakpoint(), bp()
+ system settings:
enableaslr(), disableaslr()
+ settings:
verbose(), hollywood()
+ advanced:
ltrace()
Try help("cmdname") for detailed usage on command cmdname.
>
The advanced help for help follow:
> help("help")
WSH HELP FOR FUNCTION help
NAME
help
SYNOPSIS
help([topic])
DESCRIPTION
Display help on [topic]. If [topic] is ommitted, display general help.
RETURN VALUES
None
>
The quit command terminates the main wsh process and exits the wsh interpreter.
Here is the help page for quit
> help("quit")
WSH HELP FOR COMMAND quit
NAME
quit
SYNOPSIS
quit
DESCRIPTION
Exit wsh.
RETURN VALUES
Does not return : exit wsh
>
The exit command behaves much like the quit command.
Here is the detailed help for the exit command:
> help("exit")
WSH HELP FOR COMMAND exit
NAME
exit
SYNOPSIS
exit
DESCRIPTION
Exit wsh.
RETURN VALUES
Does not return : exit wsh
>
It is worth noticing that typing exit(0) in the terminal does something different entirely : this will result in calling the function exit(), typically from the C library, with the parameter 0.
The shell command instanciates an instance of /bin/sh from the wsh interpreter. Terminating the /bin/sh session will allow returning in the parent wsh session.
> help("shell")
WSH HELP FOR COMMAND shell
NAME
shell
SYNOPSIS
shell [command]
DESCRIPTION
Run a /bin/sh shell.
RETURN VALUES
None. Returns uppon shell termination.
>
From the wsh interpreter, the following commands start a /bin/sh shell, run the /bin/id application from this shell, and finally calls exit, which terminates the /bin/sh session and returns into the wsh interpreter.
> shell
$ id
uid=1001(jonathan) gid=1001(jonathan) groups=1001(jonathan)
$ exit
>
The exec command allows running an external command from the wsh interpreter.
Here is the detailed help page for the exec command :
> help("exec")
WSH HELP FOR COMMAND exec
NAME
exec
SYNOPSIS
exec <command>
DESCRIPTION
Run <command> via the system() library call.
RETURN VALUES
None. Returns uppon <command> termination.
>
The following command exemplifies calling the uname system utility with the "-a" argument:
> exec uname -a
Linux blackbox 3.13.0-68-generic #111-Ubuntu SMP Fri Nov 6 18:17:06 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
>
The clear command clears the terminal. Its detailed help follows:
> help("clear")
WSH HELP FOR COMMAND clear
NAME
clear
SYNOPSIS
clear
DESCRIPTION
Clear terminal.
RETURN VALUES
None.
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