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Full Discussion: revision of copy script to allow for single quote
Top Forums Shell Programming and Scripting revision of copy script to allow for single quote Post 302707387 by LMHmedchem on Friday 28th of September 2012 01:06:39 PM
Old 09-28-2012
revision of copy script to allow for single quote
I have the following script that I use to copy a list of files from one dir to another,
Code:
#!/usr/bin/bash
# $1=filename of file with the list of files to copy
# $2=column header for col in list file with filenames (filePath in most cases)
# $3=src dir
# $3=destination dir

FILE_LIST="$1"
FILE_FIELD="$2"
SOURCE_DIR="$3"
DEST_DIR="$4"

if [ $# -ne 4 ]
then
   echo "usage: $0 file_list field src_dir dest_dir" >&2
   exit 1
fi
if [ ! -f "$FILE_LIST" ]
then
    echo "Invalid filelist $FILE_LIST">&2
    exit 2
fi
# create destination directory if it doesnt' exist
if [ ! -d "$DEST_DIR" ]
then
    mkdir $DEST_DIR
fi
if [ ! -d "$SOURCE_DIR" ]
then
    echo "Invalid source directory">&2
    exit 4
fi
 
awk -vS="$SOURCE_DIR" -vFLD="$FILE_FIELD" 'NR==1{for(i=1;i<=NF;i++)if($i==FLD)w=i;next}
w {print S "/" $w}' $FILE_LIST | xargs  -r cp --target-directory="$DEST_DIR"

This reads the list of file names from a column in a text file and then copies those files from the src dir to the target dir.

I have run into a problem as some of my file names contain single quotes and I am getting an xargs error,

"xargs: unmatched single quote; by default quotes are special to xargs unless you use the -0 option"

I tried adding -0, but I got an error that the argument line was too long. I don't know xargs well enough to know exactly which arguments I need, or if I need to use a different approach to the script. The filenames will never have spaces or double quotes, but may have . , ' - _ ~ ( ) [ ] { } < >

I appreciate the assistance as there are often a lot of files and no good solution in the absence of a script.

LMHmedchem
 

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LEARN ABOUT ULTRIX

whereis

whereis(1)						      General Commands Manual							whereis(1)

Name
       whereis - locate source, binary, and or manual for program

Syntax
       whereis [-sbm] [-u] [-SBM dir... -f] name...

Description
       The command locates source/binary and manuals sections for specified files.  The supplied names are first stripped of leading pathname com-
       ponents and any (single) trailing extension of the form ``.ext'', for example,``.c''.  Prefixes of ``s.'' resulting from use of source code
       control are also dealt with.  The command then attempts to locate the desired program in a list of standard places.

Options
       -S dir
	  Search for source files in specified directory.

       -B dir
	  Search for binary files in given directory.

       -M dir
	  Search for manual section files in given directory.

       -b Searches only for binary files.

       -f Terminates last directory list created from use of -S, -B or -M flags and signals the start of file names.

       -m Searches only for manual section files.

       -s Searches only for source files.

       -u Searches for files that do not have one of binary, source or manual section files.  A file is said to be unusual if it does not have one
	  entry of each requested type.  Thus ``whereis -m -u *'' asks for those files in the current directory which have no documentation.

Examples
       The following finds all the files in which are not documented in with source in
       cd /usr/ucb
       whereis -u -M /usr/man/man1 -S /usr/src/cmd -f *

Restrictions
       Since the program uses to run faster, pathnames given with the -M -S and -B must be full.  That is, they must begin with a ``/''.

Files
       /usr/src/*
       /usr/{doc,man}/*
       /lib, /etc, /usr/{lib,bin,ucb,old,new,local}

																	whereis(1)
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