On Sun, 28 Dec 2008 13:21:59 Erez D wrote:
>
> On Sun, Dec 28, 2008 at 12:00 AM, Oleg Goldshmidt wrote:
>
> > >>
> > >> $ basename ${foo/*input_/} .txt
> > >>
>
> this is a solution speceific to the .txt being preceided by the 000.
> (it will not work on path/input_000_xyz.txt).
>
> i just wanted to know if i can do that in one line in bash without any
> external programs (like sed )
> the answer is - it can't be done. that's good enough for me, i'll use a temp
> var and two lines.
It can be done with bash ONLY in 2 lines.
1st solution (simple extraction):
FL=/GIBUY/abc_input_000_xyz.txt
NUM=${FL:${#FL}-11:3}
2nd solution - use IFS to break the file name into parts:
IFS="_."
PRTS=($FL) # you can use the file name directly
now you have the "000" in "${PRTS[2]}"
you can check it with:
echo "${PRTS[0]} ${PRTS[1]} ${PRTS[2]} ${PRTS[3]} ${PRTS[4]}"
echo "${PRTS[2]}"
Ehud.
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