Initialize file name bash shell - Linux Post: 303026661

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Top Forums Shell Programming and Scripting Initialize file name bash shell - Linux Post 303026661 by Geneanalyst on Saturday 1st of December 2018 07:56:21 AM

12-01-2018

Registered User

Quote:

Originally Posted by Don Cragun

What you have looks like it would try to change a file named FILE_1000G.vcf to instead have the literal name $filename_1000G.vcf assuming that the only file in the directory where you run this script is named FILE_1000G.vcf.

As you know, shell variable expansions are not expanded when $variable_name appears inside single quotes. And, if your system has a rename utility, it probably won't be happy with operands that do not contain the string you're trying to replace. (I know of several systems that have a rename() function in C; but I don't have access to any that have a rename utility.) So, in case your system does have a rename utility that does what I'm guessing you're trying to do, you might want to try:

Code:

set -e
echo 'Please enter your name:'
read username
rename "s/FILE/$username/" *FILE*

Assuming that you're using a POSIX conforming shell (which you have not specified), and using just standard utilities, you might want to try something more like:

Code:

echo "Please enter your name:"
read username
for filename in *FILE*
do    if [ -f "$filename" ]
    then    prefix=${filename%%FILE*}
        suffix=${filename#*FILE}
        mv "$filename" "$prefix$username$suffix"
    fi
done

This should work in any directory containing zero or more regular files with filenames that contain the literal string FILE one or more times (replacing only the first occurrence of FILE if FILE appears more than once in a filename).

Thanks Don, I liked your 1st code, just learned something!

Geneanalyst

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LEARN ABOUT POSIX

apple_dump

APPLE_DUMP(1)							   Netatalk 2.2 						     APPLE_DUMP(1)

NAME

       apple_dump - Dump AppleSingle/AppleDouble format file

SYNOPSIS

       apple_dump [-a] FILE | DIR
							  apple_dump -f FILE
							  apple_dump -d FILE
							  apple_dump -h | -help | --help
							  apple_dump -v | -version | --version

DESCRIPTION

       apple_dump dump AppleSingle/AppleDouble format file.

OPTIONS

       -a FILE|DIR
	   This is default. Dump a AppleSingle/AppleDouble file for FILE or DIR automatically. Extrapolate FinderInfo type from absolute path. If
	   FILE is not AppleSingle/AppleDouble format, look for .AppleDouble/FILE and ._FILE. If DIR, look for DIR/.AppleDouble/.Parent and ._DIR.

       -f FILE
	   Dump FILE. Assume FinderInfo to be FileInfo.

       -d FILE
	   Dump FILE. Assume FinderInfo to be DirInfo.

       -h, -help, --help
	   Display the help and exit

       -v, -version, --version
	   Show version and exit

NOTE

       There is no way to detect whether FinderInfo is FileInfo or DirInfo. By default, apple_dump examins whether file or directory, a parent
       directory is .AppleDouble, filename is ._*, filename is .Parent, and so on.

       If setting option -f or -d, assume FinderInfo and doesn't look for another file.

SEE ALSO

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Netatalk 2.2							    02 Sep 2011 						     APPLE_DUMP(1)