creating directory error - UNIX for Advanced & Expert Users

lakshmananindia · #1 (**permalink**) 09-03-2007

i have create a Directory with "$@#$%" .
After creating a Directory, put ls command display "#$%" .
Why?

blowtorch · #2 (**permalink**) 09-03-2007

From the man page of bash,

Quote:

Special Parameters
The shell treats several parameters specially. These param-
eters may only be referenced; assignment to them is not
allowed.
@ Expands to the positional parameters, starting from
one. When the expansion occurs within double quotes,
each parameter expands to a separate word. That is,
"$@" is equivalent to "$1" "$2" ... When there are no
positional parameters, "$@" and $@ expand to nothing
(i.e., they are removed).

Your $@ is being "expanded to nothing". If you want to see how it works, run "set -x" and then run your mkdir command. You will then see that the mkdir command gets only "#$%" as args.

Run this in csh. "Variable syntax".

lakshmananindia · #3 (**permalink**) 09-04-2007

Quote:

Originally Posted by blowtorch

From the man page of bash,

Your $@ is being "expanded to nothing". If you want to see how it works, run "set -x" and then run your mkdir command. You will then see that the mkdir command gets only "#$%" as args.

Run this in csh. "Variable syntax".

thank you for your kind reply.

do u tell me what is set -x?

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