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Full Discussion: How to delete all lines with less then 32 characters from a textfile?
Top Forums Shell Programming and Scripting How to delete all lines with less then 32 characters from a textfile? Post 302399138 by Ultrix on Friday 26th of February 2010 11:45:22 AM
Old 02-26-2010
Quote:
Originally Posted by alister
Did you test it with filenames containing IFS characters? Assuming a default IFS value, your option handling, sed invocations, and cat statement will all barf if a filename contains whitespace.

Code:
for opt in $*

should be
Code:
for opt in "$@"

All instances of $3 need to be double-quoted.

Alister
Okay, I'll change that then.

EDIT: I fixed the script. It now looks like this:
Code:
#!/bin/bash
# deletes lines of a certain range length from a file
# Writing the result to the file is optional.

write="no";
for opt in "$@"
do
	case "$opt" in
		-w ) write="yes";
		     shift;;
		-* ) shift;;
		*  );;
	esac
done
least=$1;
great=$2;
shift;
shift;
filname="$*";
if [ $write == "yes" ]
then
	sed -e "/^.\{$least,$great\}$/d" "$filname" > tempfile.txt;
	cat tempfile.txt > "$filname";
	rm tempfile.txt;
else
	sed -e "/^.\{$least,$great\}$/d" "$filname";
fi
unset write

All I did was put quotation marks around the filename. I was also able to fix another script that I wrote a while back which was having the same problem.

Actually I've found I don't have to use "$@". It works whether I use that or $*. The quotation marks were the only problem.
Last edited by Ultrix; 02-26-2010 at 01:10 PM..
 

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LEARN ABOUT REDHAT

unix2dos

unix2dos(1)						      General Commands Manual						       unix2dos(1)

NAME

       unix2dos - UNIX to DOS text file format converter

SYNOPSYS

       unix2dos [options] [-c convmode] [-o file ...] [-n infile outfile ...]

       Options:

       [-hkqV] [--help] [--keepdate] [--quiet] [--version]

DESCRIPTION

       This manual page documents unix2dos, the program that converts text files in UNIX format to DOS format.

OPTIONS

       The following options are available:

       -h --help
	      Print online help.

       -k --keepdate
	      Keep the date stamp of output file same as input file.

       -q --quiet
	      Quiet mode. Suppress all warning and messages.

       -V --version
	      Prints version information.

       -c --convmode convmode
	      Sets conversion mode. Simulates unix2dos under SunOS.

       -o --oldfile file ...
	      Old file mode. Convert the file and write output to it. The program default to run in this mode. Wildcard names may be used.

       -n --newfile infile outfile ...
	      New  file  mode.	Convert the infile and write output to outfile. File names must be given in pairs and wildcard names should NOT be
	      used or you WILL lost your files.

EXAMPLES

       Get input from stdin and write output to stdout.

	      unix2dos

       Convert and replace a.txt. Convert and replace b.txt.

	      unix2dos a.txt b.txt

	      unix2dos -o a.txt b.txt

       Convert and replace a.txt in ASCII conversion mode.  Convert and replace b.txt in ISO conversion mode.

	      unix2dos a.txt -c iso b.txt

	      unix2dos -c ascii a.txt -c iso b.txt

       Convert and replace a.txt while keeping original date stamp.

	      unix2dos -k a.txt

	      unix2dos -k -o a.txt

       Convert a.txt and write to e.txt.

	      unix2dos -n a.txt e.txt

       Convert a.txt and write to e.txt, keep date stamp of e.txt same as a.txt.

	      unix2dos -k -n a.txt e.txt

       Convert and replace a.txt. Convert b.txt and write to e.txt.

	      unix2dos a.txt -n b.txt e.txt

	      unix2dos -o a.txt -n b.txt e.txt

       Convert c.txt and write to e.txt. Convert and replace a.txt.  Convert and replace b.txt. Convert d.txt and write to f.txt.

	      unix2dos -n c.txt e.txt -o a.txt b.txt -n d.txt f.txt

DIAGNOSTICS

BUGS

       The program does not work properly under MSDOS in stdio processing mode.  If you know why is that so, please tell me.

AUTHOR

       Benjamin Lin - ( blin@socs.uts.edu.au )

MISCELLANY

       Tested environment:

	      Linux 1.2.0 with GNU C 2.5.8

	      SunOS 4.1.3 with GNU C 2.6.3

	      MS-DOS 6.20 with Borland C++ 4.02

       Suggestions and bug reports are welcome.

SEE ALSO

       dos2unix(1)

1995.03.31							   unix2dos v2.2						       unix2dos(1)
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