Hello all,
I have two files, that I suspect may contain hidden characters (EG, three spaces instead of a tab). Does anyone know of any tool that can display this (I have tried using diff, but I'm not quite sure it would do the job) (6 Replies)
Hi. I have a script which is deleting files with a particular extension and older than 45 days.The code is:
find <path> -name "<filename_pattern>" -mtime +45 -exec rm {} \;
But the problem is that some important files are also getting deleted.To prevent this I have decide to make a dummy... (4 Replies)
I know that cat -v will show me hidden characters in a file....
I for some reason seem to think that there's a bash command that will show me hidden characters in a variable in a script? Or am I just imagining it?
Thanks in advance (8 Replies)
Hi:
I found some "hidden" directories created by a version control tool that can't be displayed by "ls -al". but user can "cd" into them and see the files inside.
My questions are:
1) what commands can reveal those directories when "ls -al" fails?
2) how do you create such... (2 Replies)
Hi
I have a prompt like this:
PS1='\\u@\h \\w $(es=$?; ] && echo "\" || echo "\")\$\'
It works like it should, but have a bug.
Problem is the counting of hidden files
$(($(ls -ad .* | wc -l)-2))
echo $(($(ls -ad .* | wc -l)-2))
The . seems to create the problem when I cut and past to... (3 Replies)
Find all files in the current directory only excluding hidden directories and files.
For the below command, though it's not deleting hidden files.. it is traversing through the hidden directories and listing normal which should be avoided.
`find . \( ! -name ".*" -prune \) -mtime +${n_days}... (7 Replies)
Hello.
I use this command :
rsync -av --include=".*" --dry-run "$A_FULL_PATH_S" "$A_FULL_PATH_D"The data comes from the output of a find command.
And no full source directories are in use, only some files.
Source example... (2 Replies)
Discussion started by: jcdole
2 Replies
LEARN ABOUT DEBIAN
shell-quote
SHELL-QUOTE(1p) User Contributed Perl Documentation SHELL-QUOTE(1p)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)