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How to use ls with pattern and including path?

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Top Forums Shell Programming and Scripting How to use ls with pattern and including path?
# 29  
Old 08-21-2014
You can find out if ls is a built-in in your shell using the command:
Code:
type ls

If ls isn't a built-in in bash, the bug is in ls; not bash. If bash was screwing up the expansion of abc*.txt, you'd see errors from ls like:
Code:
ls: cannot stat filename

or:
Code:
ls: no such file: filenaem

instead of seeing funny names.

You might just be seeing the ls bug when it is called from bash due to differences in the size of the environment or the values of some environment variables that are being set by bash that are not set in ksh, or vice versa. And, with a different list of files, ls might work when called from bash and fail when called from ksh.

Good luck!
# 30  
Old 08-22-2014
Hello Don,

Many thanks for your suggestions/advices.

Sending the command you shared, the answer is different for type ls in bash and ksh. So, with the outputs below
does it mean that for ksh "ls" is a built-in command and for bash is not?

Code:
bbt@ax-1:/voddf/bbts/ax-abc/files:~>% echo $SHELL
/bin/bash
bbt@ax-1:/voddf/bbts/ax-abc/files:~>% 
bbt@ax-1:/voddf/bbts/ax-abc/files:~>% type ls
ls is aliased to `ls --color=tty'
bbt@ax-1:/voddf/bbts/ax-abc/files:~>% 
bbt@ax-1:/voddf/bbts/ax-abc/files:~>% ksh
u@h:w>% 
u@h:w>% type ls
ls is a tracked alias for /bin/ls

Thanks again.

Regards
# 31  
Old 08-22-2014
Hm. So it's trying to use colorized ls in a crummy Cygwin terminal? That could do it.

Try unalias ls and see if it still messes up.
# 32  
Old 08-22-2014
Hello Corona688,

The output of type ls I previously posted are in the machine GNU/Linux where the
files are stored. I'd like to try to reproduce how is defined ls in GNU/Linux under cygwin terminal
to see if I get issues before to change something in GNU/Linux machine.

In cygwin the ls command is like this:
Code:
$ type ls
ls is /usr/bin/ls

What I have to do in Cygwin in order that when I send type ls the output be the same as GNU/Linux machine,
I mean, get this
Code:
type ls
ls is aliased to `ls --color=tty'

Thanks
# 33  
Old 08-22-2014
Quote:
Originally Posted by Ophiuchus
Hello Don,

Many thanks for your suggestions/advices.

Sending the command you shared, the answer is different for type ls in bash and ksh. So, with the outputs below
does it mean that for ksh "ls" is a built-in command and for bash is not?

Code:
bbt@ax-1:/voddf/bbts/ax-abc/files:~>% echo $SHELL
/bin/bash
bbt@ax-1:/voddf/bbts/ax-abc/files:~>% 
bbt@ax-1:/voddf/bbts/ax-abc/files:~>% type ls
ls is aliased to `ls --color=tty'
bbt@ax-1:/voddf/bbts/ax-abc/files:~>% 
bbt@ax-1:/voddf/bbts/ax-abc/files:~>% ksh
u@h:w>% 
u@h:w>% type ls
ls is a tracked alias for /bin/ls

Thanks again.

Regards
Expanding a bit on what Corona688 said...

No. It means that one of your bash startup files defines an alias for ls that adds the --color=tty option to ls every time you invoke it as ls. The commands:
Code:
/bin/ls  -ltr abc*.txt
\ls -ltr abc*.txt
"ls" -ltr abc*.txt

will all probably work as you expect them to. Or you could issue the command: unalias ls and all uses of ls after that should behave as you would expect (in that shell execution environment).

According to the Linux ls man page, the valid values for the --color optional option argument are "always", "auto", and "never"; it doesn't say anything about what happens when it is set the way you have it ("tty"). According to that man page, the setting of the environment variable LS_COLORS (settable with the dircolors utility) could also be your problem. I don't have a CYGWIN ls man page, so "tty" may be valid there; try man ls to investigate further.

The ls utility on my system doesn't have this option, so I can't play around with it to make other suggestions.
# 34  
Old 08-22-2014
Quote:
Originally Posted by Don Cragun
[/ICODE]. The commands:
Code:
/bin/ls  -ltr abc*.txt
\ls -ltr abc*.txt
"ls" -ltr abc*.txt

will all probably work as you expect them to.
Very nice Don,

The 3 options you mention make that ls output be correct this time!!!
Then the 3 different syntaxis for ls command you say is like say "use the built-in ls command"?

For reference, below is what "man ls" page of GNU/linux machine says about colors.
Code:
:       --color[=WHEN]
:              control  whether  color is used to distinguish file types.  WHEN
:              may be ÔÇÿneverÔÇÖ, ÔÇÿalwaysÔÇÖ, or ÔÇÿautoÔÇÖ  
:       By  default,  color is not used to distinguish types of files.  That is
:       equivalent to using --color=none.  Using the --color option without the
:       optional  WHEN  argument  is  equivalent to using --color=always.  With
:       --color=auto, color codes are output only if standard  output  is  con-
:       nected  to  a  terminal  (tty).  The environment variable LS_COLORS can
:       influence the colors, and can be set easily by the dircolors command.

I think I'll use the ls command as you suggested since the outputs are correct in that way, without change anything Smilie

Many thanks for your great support to all

Addition: If I add --color to ls command makes that output be correct too.
Like this:
Code:
ls --color -ltr abc*.txt

Then the 4 options below produce correct outputs:
Code:
/bin/ls  -lst abc*.txt
\ls -lst abc*.txt
"ls" -lst abc*.txt
ls --color -lst abc*.txt

Best regards
Last edited by Ophiuchus; 08-22-2014 at 02:31 PM.. Reason: Addition: If I add --color to ls command makes that output be correct too.
# 35  
Old 08-22-2014
A Windows CMD prompt does not have ASCII colors, it does colors a different way. Cygwin may be trying to emulate ASCII colors and doing an imperfect job.
This User Gave Thanks to Corona688 For This Post:
Ophiuchus
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