getting at raw command line

getting at raw command line

[Jack Andrews]

hi there,

is there a way to get the raw text that eventually gets cooked to
argc/argv?  is there any portable way?

ta,


jack

Re: getting at raw command line

[Lukas]

I don't know if i understand your question ... every
command line arguments you pass to program in Linux,
are left on the stack ( actualy they are pointers to
asciz strings )

Lukas

--- Jack Andrews <effbiae@gmail.com> wrote:

> hi there,
> 
> is there a way to get the raw text that eventually
> gets cooked to
> argc/argv?  is there any portable way?
> 
> ta,
> 
> 
> jack
> -
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Re: getting at raw command line

[Jack Andrews]

the shell changes arguments like * to a number of arguments.  is there
a way to get the *?  that is, if my program is p, i want this
behaviour:

 $ ls
 file.1 file.2
 $ ls *
 file.1 file.2
 $ p file.1
 file.1
 $ p *
 *

i don't want

 $ p *
 file.1 file.2

Re: getting at raw command line

[Gerardo García Peña]

Jack Andrews escribió:
> the shell changes arguments like * to a number of arguments.  is there
> a way to get the *?  that is, if my program is p, i want this
> behaviour:
>
>  $ ls
>  file.1 file.2
>  $ ls *
>  file.1 file.2
>  $ p file.1
>  file.1
>  $ p *
>  *
>
> i don't want
>
>  $ p *
>  file.1 file.2
> -
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>   

Wildcard expansion is not responsability of Unix/Operating System... it
is done by the shell (bash)
if you try

ls '*'

you will get:

ls: *: No such file or directory

and if you try

p '*'
*

You can also escape wildcard expansion in these ways:

ls '*'
ls "*"
ls \*


luck,
ge

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Re: getting at raw command line

[Lukas]

As i said, when you start program 'p whatever ' %esp
points place on stack where number of parameters was
put ex. 
$p 1 2 3 -> movl (%esp),%ecx => %ecx=3 )

next (%esp+4) adress of program name ex. 

$/home/usr/bin/p 1 2 3 -> (%esp+4) adres of string
"/home/usr/bin/p"

(%esp+8)(+16 if you have 64-bit arch) adress of text
string of first parameter, so if you write

$ p * -> movl (%esp+8),%ecx / movq (%rsp+16),%rcx
        movl (%ecx),%ebx / movq (%rcx),%rbx
       %ecx=42 ( '*' )
so now you can do with it whatever you want ( write
using SYS_WRITE, printf etc )
Lukas


--- Jack Andrews <effbiae@gmail.com> wrote:

> the shell changes arguments like * to a number of
> arguments.  is there
> a way to get the *?  that is, if my program is p, i
> want this
> behaviour:
> 
>  $ ls
>  file.1 file.2
>  $ ls *
>  file.1 file.2
>  $ p file.1
>  file.1
>  $ p *
>  *
> 
> i don't want
> 
>  $ p *
>  file.1 file.2
> -
> To unsubscribe from this list: send the line
> "unsubscribe linux-assembly" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at 
> http://vger.kernel.org/majordomo-info.html
> 



       
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Re: getting at raw command line

[Lukas]

of course in last line of "code" ;) should be %ebx=42

regards
Lukas

--- Lukas <blurrpp@yahoo.com> wrote:

> As i said, when you start program 'p whatever ' %esp
> points place on stack where number of parameters was
> put ex. 
> $p 1 2 3 -> movl (%esp),%ecx => %ecx=3 )
> 
> next (%esp+4) adress of program name ex. 
> 
> $/home/usr/bin/p 1 2 3 -> (%esp+4) adres of string
> "/home/usr/bin/p"
> 
> (%esp+8)(+16 if you have 64-bit arch) adress of text
> string of first parameter, so if you write
> 
> $ p * -> movl (%esp+8),%ecx / movq (%rsp+16),%rcx
>         movl (%ecx),%ebx / movq (%rcx),%rbx
>        %ecx=42 ( '*' )
> so now you can do with it whatever you want ( write
> using SYS_WRITE, printf etc )
> Lukas
> 
> 
> --- Jack Andrews <effbiae@gmail.com> wrote:
> 
> > the shell changes arguments like * to a number of
> > arguments.  is there
> > a way to get the *?  that is, if my program is p,
> i
> > want this
> > behaviour:
> > 
> >  $ ls
> >  file.1 file.2
> >  $ ls *
> >  file.1 file.2
> >  $ p file.1
> >  file.1
> >  $ p *
> >  *
> > 
> > i don't want
> > 
> >  $ p *
> >  file.1 file.2
> > -
> > To unsubscribe from this list: send the line
> > "unsubscribe linux-assembly" in
> > the body of a message to majordomo@vger.kernel.org
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> > http://vger.kernel.org/majordomo-info.html
> > 
> 
> 
> 
>        
>
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Re: getting at raw command line

[Lukas]

and again wrong ... (to fast:) ) ... %bl=42,%bh=0 :D
Lukas
--- Lukas <blurrpp@yahoo.com> wrote:

> of course in last line of "code" ;) should be
> %ebx=42
> 
> regards
> Lukas
> 
> --- Lukas <blurrpp@yahoo.com> wrote:
> 
> > As i said, when you start program 'p whatever '
> %esp
> > points place on stack where number of parameters
> was
> > put ex. 
> > $p 1 2 3 -> movl (%esp),%ecx => %ecx=3 )
> > 
> > next (%esp+4) adress of program name ex. 
> > 
> > $/home/usr/bin/p 1 2 3 -> (%esp+4) adres of string
> > "/home/usr/bin/p"
> > 
> > (%esp+8)(+16 if you have 64-bit arch) adress of
> text
> > string of first parameter, so if you write
> > 
> > $ p * -> movl (%esp+8),%ecx / movq (%rsp+16),%rcx
> >         movl (%ecx),%ebx / movq (%rcx),%rbx
> >        %ecx=42 ( '*' )
> > so now you can do with it whatever you want (
> write
> > using SYS_WRITE, printf etc )
> > Lukas
> > 
> > 
> > --- Jack Andrews <effbiae@gmail.com> wrote:
> > 
> > > the shell changes arguments like * to a number
> of
> > > arguments.  is there
> > > a way to get the *?  that is, if my program is
> p,
> > i
> > > want this
> > > behaviour:
> > > 
> > >  $ ls
> > >  file.1 file.2
> > >  $ ls *
> > >  file.1 file.2
> > >  $ p file.1
> > >  file.1
> > >  $ p *
> > >  *
> > > 
> > > i don't want
> > > 
> > >  $ p *
> > >  file.1 file.2
> > > -
> > > To unsubscribe from this list: send the line
> > > "unsubscribe linux-assembly" in
> > > the body of a message to
> majordomo@vger.kernel.org
> > > More majordomo info at 
> > > http://vger.kernel.org/majordomo-info.html
> > > 
> > 
> > 
> > 
> >        
> >
>
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> 
> 
> 
>        
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