bash scripting

ZAMO · 01-19-2009, 02:21 AM

Hi all,

I need to know the meaning of a call in for loop?

Code:

for i in "$@" ; do
 echo $i
done

any idea? Got struck in an old script. What I want is, what is mean by

Code:

for i in "$@"

Thanks

eco · 01-19-2009, 02:25 AM

Quote:

@ 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"
"$2" ... If the double-quoted expansion occurs within a word,
the expansion of the first parameter is joined with the
beginning part of the original word, and the expansion of the
last parameter is joined with the last part of the original
word. When there are no positional parameters, "$@" and $@
expand to nothing (i.e., they are removed).

Streigh out of man bash

... and to make things clearer:

Code:

#!/bin/bash

for i in "$@"; do
        echo $i
done

Code:

# . ./test.sh one two three
one
two
three