topic Re: Copying the files in Operating System - Linux

Copying the files

CA1490051 — Wed, 18 Jul 2007 07:43:15 GMT

Hi ,

Can i know the command to copy all my *.cpp files to *.c files in one shot.

thanks in advance
Vikram

Re: Copying the files

Court Campbell — Wed, 18 Jul 2007 07:54:39 GMT

if the file are in the same directory you could do something like this:

# for file in `ls *\.cpp`
> do
> mv $file $(echo $file | awk -F\. '{print $1}').c
>done

Re: Copying the files

Court Campbell — Wed, 18 Jul 2007 07:56:10 GMT

Sorry, I wasn't looking close enough. You need to change mv to cp if you want to copy.

Re: Copying the files

MarkSyder — Wed, 18 Jul 2007 08:10:31 GMT

And if you want to keep the same ownership and permissions, use cp -p

Mark Syder (like the drink but spelt different)

Re: Copying the files

James R. Ferguson — Wed, 18 Jul 2007 09:06:51 GMT

Hi Vikram:

The 'basename()' function (see the manpages) is your friend:

cd /path
for F in `ls -1 *.cpp`
do
cp -p `basename ${F} .cpp` `basename ${F} .cpp`.c
done

Regards!

...JRF...

Re: Copying the files

spex — Wed, 18 Jul 2007 09:15:39 GMT

Hi Vikram,

This (quasi-tested) script operates on an entire directory structure:

$ cat change_extension.sh
#!/usr/bin/sh

CMD=/usr/bin/cp
#CMD=/usr/bin/mv

if [ ${#} -lt 3 ]
then
echo "usage: ${0} " >&2
exit 1
fi

FPATH=${1}
EXTO=${2}
EXTN=${3}

find ${FPATH} -type f -name "*.${EXTO}" -print |\
while read L
do
F=${L%.${EXTO}}
${CMD} ${L} ${F}.${EXTN}
done
exit 0

For example:
$ ./change_extension.sh . cpp c

PCS

Re: Copying the files

Peter Nikitka — Thu, 19 Jul 2007 12:14:42 GMT

Hi,

another possibility:
ls *.cpp | sed 's/.cpp$//' | xargs -i cp -p '{}.cpp' '{}.c'

You can drop the single quotes, if not running in a C-shell.

mfG Peter

Re: Copying the files

Sandman! — Thu, 19 Jul 2007 13:38:35 GMT

# ls -1 *.cpp | awk -F"cpp$" '{system("cp "$0" "$1"c")}'