I've been using the following code to make sure a shell script only runs under a "safe" directory.
Comments/Improvements?
#!/bin/sh
#----------------------------------------------------------------------------#
#..........................................................#... (8 Replies)
i am using solaris 5.10. i can create two different files "test" and ".test" in the same directory. now suppose i want to change the attribute of the hidden file .test to visible is it possible???
since "." is just an attribute to mark a file hidden why is unix allows creation of "file" and... (14 Replies)
Hi,
I'm writing a shell script that will create a folder if it does not exist yet. Here's the script: (this if statement is inside a while loop)
folderName="Pics"
if ! test -d folderName
then
mkdir $folderName
fi
However, after the folder Pics has been created, every time the... (3 Replies)
rm: Unable to remove directory /mnt/users/test/logs/: File exists
ls -latr
total 191208
drwxrwxrwx 6 test echo 4096 Jul 3 22:36 ..
-rwxrwxrwx 1 test echo 97692804 Jul 3 22:36 .nfsDFA4
drwxrwxr-x 2 test echo 4096 Jul 3 23:00 .
M not able to delete... (4 Replies)
I'm almost pulling out my hair trying to figure out what's wrong with this... there's no reason I can see that it shouldn't be working. It seems that the code acts as though the conditional statement is true no matter what - I've even tried removing the negation operator, but it always goes into... (5 Replies)
This is the code:
while test 1 -eq 1
do
read a
$a
if test $a = stop
then
break
fi
done
I read a command on every loop an execute it.
I check if the string equals the word stop to end the loop,but it say that I gave too many arguments to test.
For example echo hello.
Now the... (1 Reply)
Is there a way for a bash script to test if it can cd into a directory without actually attempting to cd into it?
I am looking for something along the lines of:
if ;then
#code to execute
fi
except in this case I don't want to test if the directory exists; what I want is to test... (8 Replies)
Discussion started by: dexdex200
8 Replies
LEARN ABOUT DEBIAN
shell-quote
SHELL-QUOTE(1p) User Contributed Perl Documentation SHELL-QUOTE(1p)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)