Converting filenames to lowercase

[Mark Hobley]

I am using the Almquist Shell (sh).

How can I convert a batch of mixed case filenames to lowercase ?

In the olden days, we used to ftp localhost, and use the ftp name mangling to
provide the case conversion. (Now that is just plain horrible, but we needed
a two minute solution.) Hey .. samba has an equally horrible solution.

Regards,

Mark.
--
Mark Hobley
393 Quinton Road West
QUINTON
Birmingham
B32 1QE

Telephone: [phone]
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Email: markhobley at hotpop dot donottypethisbit com

http://markhobley.yi.org/

[Ed Morton]

Post by Mark Hobley
I am using the Almquist Shell (sh).
How can I convert a batch of mixed case filenames to lowercase ?
In the olden days, we used to ftp localhost, and use the ftp name mangling to
provide the case conversion. (Now that is just plain horrible, but we needed
a two minute solution.) Hey .. samba has an equally horrible solution.
Regards,
Mark.

man tr

Ed.

[chris dewbery]

Post by Mark Hobley
I am using the Almquist Shell (sh).
How can I convert a batch of mixed case filenames to lowercase ?
In the olden days, we used to ftp localhost, and use the ftp name mangling to
provide the case conversion. (Now that is just plain horrible, but we needed
a two minute solution.) Hey .. samba has an equally horrible solution.
Regards,
Mark.

echo "FiLENAMe" | tr [:upper:] [:lower:]

[Thobias Vakayil]

echo "FiLENAMe" | tr [A-Z] [a-z]

Post by chris dewbery

Post by Mark Hobley
I am using the Almquist Shell (sh).
How can I convert a batch of mixed case filenames to lowercase ?
In the olden days, we used to ftp localhost, and use the ftp name mangling to
provide the case conversion. (Now that is just plain horrible, but we needed
a two minute solution.) Hey .. samba has an equally horrible solution.
Regards,
Mark.

echo "FiLENAMe" | tr [:upper:] [:lower:]

[Chris F.A. Johnson]

On 2005-10-31, Thobias Vakayil wrote:

[please don't top post; reply moved]

Post by Thobias Vakayil

Post by chris dewbery

Post by Mark Hobley
I am using the Almquist Shell (sh).
How can I convert a batch of mixed case filenames to lowercase ?
In the olden days, we used to ftp localhost, and use the ftp name mangling to
provide the case conversion. (Now that is just plain horrible, but we needed
a two minute solution.) Hey .. samba has an equally horrible solution.

echo "FiLENAMe" | tr [:upper:] [:lower:]

Older versions of tr do not support character classes.

Post by Thobias Vakayil
echo "FiLENAMe" | tr [A-Z] [a-z]

You need to quote the patterns. See what happens when this is
entered in a directory with a number of one-letter filenames:

$ echo "FiLENAMe" | tr [A-Z] [a-z]
tr: too many arguments
Try `tr --help' for more information

$ echo "FiLENAMe" | tr '[A-Z]' '[a-z]'
filename

[Chris F.A. Johnson]

Post by Mark Hobley
I am using the Almquist Shell (sh).
How can I convert a batch of mixed case filenames to lowercase ?

Ed suggested tr, but pure shell methods may be faster. These
functions convert uppercase characters to lowercase:

_lwr_str()
{
_LWR_STR=$1
while :
do
case $_LWR_STR in
[A-Z]*) _lwr "$_LWR_STR"
_LWR_STR=$_LWR${_LWR_STR#?}
;;
*[A-Z]*) lwr_left=${_LWR_STR%%[A-Z]*}
lwr_right=${_LWR_STR#"$lwr_left"}
_lwr "$lwr_right"
_LWR_STR=$lwr_left$_LWR${lwr_right#?}
;;
*) break ;;
esac
done
}

_lwr()
{
_LWR=
case $1 in
A*) _LWR=a ;; B*) _LWR=b ;;
C*) _LWR=c ;; D*) _LWR=d ;;
E*) _LWR=e ;; F*) _LWR=f ;;
G*) _LWR=g ;; H*) _LWR=h ;;
I*) _LWR=i ;; J*) _LWR=j ;;
K*) _LWR=k ;; L*) _LWR=l ;;
M*) _LWR=m ;; N*) _LWR=n ;;
O*) _LWR=o ;; P*) _LWR=p ;;
Q*) _LWR=q ;; R*) _LWR=r ;;
S*) _LWR=s ;; T*) _LWR=t ;;
U*) _LWR=u ;; V*) _LWR=v ;;
W*) _LWR=w ;; X*) _LWR=x ;;
Y*) _LWR=y ;; Z*) _LWR=z ;;
*) _LWR=${1%${1#?}} ;;
esac
}


One way to use these functions is:

for file in *[A-Z]*
do
_lwr_str "$file"
mv "$file" "$_LWR_STR"
done

[John W. Krahn]

Post by Mark Hobley
I am using the Almquist Shell (sh).
How can I convert a batch of mixed case filenames to lowercase ?

mmv '*' '#l1'



John