06-29-2005
Check for ur file names
Quote:
Originally Posted by benu302000
ok, I'm trying to write a script file that lists files with specific elements in the name into a txt file, it looks like this
ls s[A-Z]*.dat > file_names.txt
can't figure out whats wrong with that line, any ideas?
thanks in advance
Everything seems right in ur line
May be there r no files with the specific name .......
Does this give some error ???
10 More Discussions You Might Find Interesting
1. Programming
Using a makefile I want to compile all .c files in the current directory without specifying them directly and then link their associated .o files into a library.
How do I do this ?
Thanks. (1 Reply)
Discussion started by: rcscott
1 Replies
2. UNIX for Dummies Questions & Answers
I'm trying to delete lines from a large text file using VI.
Every line that I am wanting to delete start with 'S' - all others do not. (A list of users)
I've tried using * but doesn't seem to like it...any ideas...
Doesn't have to be VI - but I'm better with VI than sed/awk. (8 Replies)
Discussion started by: peter.herlihy
8 Replies
3. UNIX for Dummies Questions & Answers
when writing a shell script (bourne) and using a unix command like 'ls' is there anything special you need to do to use a wildcard (like *)? (3 Replies)
Discussion started by: benu302000
3 Replies
4. UNIX for Dummies Questions & Answers
Hi All
Please excuse another straightforward question. When creating a tar archive from a directory I am attempting to use wildcards to eliminate certain filetypes (otherwise the archive gets too large). So I am looking for something along these lines.
tar -cf archive.tar * <minus all *.rst... (5 Replies)
Discussion started by: C3000
5 Replies
5. UNIX for Dummies Questions & Answers
I am using this code to locate and modify one particular ID in a file containing thousands of entries
sed 's/^>OldID/>NewID/g' Infile > Outfile
How can I modify the code so I can rename all old IDs to a new unique ID?
I tried this
sed 's/^>*/>NewID/g' Infile > Outfile
but it did not... (10 Replies)
Discussion started by: Xterra
10 Replies
6. UNIX for Advanced & Expert Users
These 2 websites do a GREAT job of explaining different types of wildcards. I learned about the categories of characters which I never knew about at all.
GNU/Linux Command-Line Tools Guide - Wildcards
GREP (1 Reply)
Discussion started by: cokedude
1 Replies
7. UNIX for Advanced & Expert Users
Does ln -s accept wildcards? It doesn't seem like it is working when I use wildcards. (9 Replies)
Discussion started by: cokedude
9 Replies
8. UNIX for Dummies Questions & Answers
Hi,
I've got a ksh for loop with wildcards specified, and I want the wildcards to be preserved when inside the loop. Instead, it is expanding the wilcards and identifying filenames in the current directory
#!/usr/bin/ksh
list="a* b*"
for i in ${list}
do
echo 'Loop value =' ${i}
done... (2 Replies)
Discussion started by: nim
2 Replies
9. Shell Programming and Scripting
to scp using windcards you use the following :
scp 'hostname:/home/username/diff_201110*' .
Enjoy ! (0 Replies)
Discussion started by: phpsnook
0 Replies
10. Shell Programming and Scripting
Hello:
I have a very basic question. I'd like to select all files except for one file. For example, say I want to move all of the files in my current directory to a subdirectory called archive, I would use mv ./* archive/ But what if I want to move all files except for README.txt? Is there an... (19 Replies)
Discussion started by: Danny.Boy
19 Replies
LEARN ABOUT DEBIAN
shell-quote
SHELL-QUOTE(1p) User Contributed Perl Documentation SHELL-QUOTE(1p)
NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$SHELL -c". This doesn't work as intended:
ssh host touch 'hi there' # fails
It creates 2 files, hi and there. Instead, do this:
cmd=`shell-quote touch 'hi there'`
ssh host "$cmd"
This gives you just 1 file, hi there.
process find output
It's not ordinarily possible to process an arbitrary list of files output by find with a shell script. Anything you put in $IFS to
split up the output could legitimately be in a file's name. Here's how you can do it using shell-quote:
eval set -- `find -type f -print0 | xargs -0 shell-quote --`
debug shell scripts
shell-quote is better than echo for debugging shell scripts.
debug() {
[ -z "$debug" ] || shell-quote "debug:" "$@"
}
With echo you can't tell the difference between "debug 'foo bar'" and "debug foo bar", but with shell-quote you can.
save a command for later
shell-quote can be used to build up a shell command to run later. Say you want the user to be able to give you switches for a command
you're going to run. If you don't want the switches to be re-evaluated by the shell (which is usually a good idea, else there are
things the user can't pass through), you can do something like this:
user_switches=
while [ $# != 0 ]
do
case x$1 in
x--pass-through)
[ $# -gt 1 ] || die "need an argument for $1"
user_switches="$user_switches "`shell-quote -- "$2"`
shift;;
# process other switches
esac
shift
done
# later
eval "shell-quote some-command $user_switches my args"
OPTIONS
--debug
Turn debugging on.
--help
Show the usage message and die.
--version
Show the version number and exit.
AVAILABILITY
The code is licensed under the GNU GPL. Check http://www.argon.org/~roderick/ or CPAN for updated versions.
AUTHOR
Roderick Schertler <roderick@argon.org>
perl v5.8.4 2005-05-03 SHELL-QUOTE(1p)