Very Computer

by **Adam Bozanic** » Wed, 31 Dec 2003 10:37:00

Hi all. I am trying to loop over each line of output from a command like
this:

#!/bin/sh
fstypes='ext2fs msdos ntfs'
for fs in $fstypes
do
lines=$( mount | grep $fs )
for line in $dirs
do
echo $line
done
done

I can't seem to get the behavior that I want. The inner loop is either
delimeting on spaces, or if I use quotes, it gets the whole thing.

In perl, this does what I want:

#!/usr/bin/perl -w

open( FH , "mount | grep ext2fs |" ) || die("can't open");

while( <FH> ){
print;

Quote:}

Is there any way to loop over each line of output like that in sh?

Thanks in advance

-Adam

by **diva_pr at yahoo dot co** » Wed, 31 Dec 2003 15:07:29

> Hi all. I am trying to loop over each line of output from a command like
> this:

> #!/bin/sh
> fstypes='ext2fs msdos ntfs'
> for fs in $fstypes
> do
> lines=$( mount | grep $fs )
> for line in $dirs
> do
> echo $line
> done
> done

#!/bin/sh
fstypes='ext2fs|msdos|ntfs'
mount -v| egrep "$fstypes" | while read line
do
echo "$line"
done

Tested on Fedora Core/Solaris(2.8) with bash(Ver>=2.05b.0(1))

hope this helps
Divakar

by **William Par** » Wed, 31 Dec 2003 16:20:21

> Hi all. I am trying to loop over each line of output from a command like
> this:

> #!/bin/sh
> fstypes='ext2fs msdos ntfs'
> for fs in $fstypes
> do
> lines=$( mount | grep $fs )
> for line in $dirs
> do
> echo $line
> done
> done

1. for fs in ext2fs msdos ntfs; do
mount | grep $fs | while read line; do
echo $line
done
done

2. mount | egrep 'ext2fs|msdos|ntfs' | while read line; do
echo $line
done

3. mount | while read line; do
case "$line" in
*ext2fs*) echo $line ;;
*msdos*) echo $line ;;
*ntfs*) echo $line ;;
esac
done

--

Linux solution for data management and processing.

by **Adam Bozanic** » Thu, 01 Jan 2004 18:27:53

On 30 Dec 2003 07:20:21 GMT

> > Hi all. I am trying to loop over each line of output from a command like
> > this:

> > #!/bin/sh
> > fstypes='ext2fs msdos ntfs'
> > for fs in $fstypes
> > do
> > lines=$( mount | grep $fs )
> > for line in $dirs
> > do
> > echo $line
> > done
> > done

> 1. for fs in ext2fs msdos ntfs; do
> mount | grep $fs | while read line; do
> echo $line
> done
> done

> 2. mount | egrep 'ext2fs|msdos|ntfs' | while read line; do
> echo $line
> done

> 3. mount | while read line; do
> case "$line" in
> *ext2fs*) echo $line ;;
> *msdos*) echo $line ;;
> *ntfs*) echo $line ;;
> esac
> done

Thanks diva_pr and William. Just what I needed.

-Adam

Very Computer

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