Yes, I'm using bash. I tried the POSIX version as well, to see if it made any difference.
It will only make a difference if you try to use the script in a different shell.
Quote:
$1 should contain the array passed to the function.
What do you mean by "the array"? Do you mean the name of the array? The elements of the array?
Quote:
I found this method searching the web. Is there a better method?
There's a lot of nonsense on the web.
If you want to pass the name of the array and then populate array with its elements, use:
Quote:
I suspect the problem may be related to this since when it descends to the first recursion level, the array length is seen as 1 and the function exits, returning only three numbers from the array. A check of $l and $g just prior to passing them to the recursive call shows them as they should be, so I'm not sure what the problem is.
hi, I was wondering if there was a good way to create an array within a function, where the name is based on a passed argument? I tried this:
_____________________________
func(){
#take in 1st arg as the arrayname
arrayName=$1
let i=0
while read line
do
arrayName=${line}
let i+=1... (5 Replies)
Hi everyone, i need your input on this. We can express a function recursivly like this
A(n) = (2 n = 0
5 n = 1
A(n − 1) + A(n − 2) % 47 n > 1
How would i go about constructing a recursive function for this?... (1 Reply)
Hi all,
I have to move all the files in a tree directory structure to a single directory. Inorder to know which file is from which directory , i'll have to add the name of the directory to the file name. For this i wrote a recursive function which is as follows... (4 Replies)
This is shell script I have made to lists out directory contents and filenames for any given directory (without using ls command). There is some problem in dirfunc function call which I have marked 1 is not working. Can anybody suggest what is the problem there and how should I correct it.
... (2 Replies)
Can someone tell me, how do i write a recursive code using shell ( eg like 'for' loop in C) which outputs the record to a database table as one row per iteration? (7 Replies)
Hi Perl Gurus , need URGENT HELP PLEASE !!!!!
I have one recursive Perl function which takes path of any directory as argument and returns array containing all the sub folders inside it recursively.
Now the problem is that it works well if i use it with one time but the problem is that when... (0 Replies)
Hi, I have a file like this
SPF_HC00001|iCalcular_Monto_Minimo|--->|SPF_HC00028|pstcObtener_Monto_Minimo
SPF_HC00004|iCalcular_Incrementos|--->|SPF_HC00032|pstcObtener_Num_Incrementos
SPF_HC00005|iCalcular_Articulo_167_Reformado|--->|SPF_HC00031|pstcObtener_Por_CB_Inc... (2 Replies)
I am facing some problem in perl recurssive function function
my @array_parent = (Some inegers);
my $outputfile = 'output.txt';
my $master_file = 'master.txt';
open (MASTER,"$>>master.txt");
foreach my $child (@array_parent){
my $line = `grep "$child" "$outputfile"`;
... (1 Reply)
Hi,
I don't know if you can help or if this is even possible, but I am trying to run the following function over an ssh and (depending on the itteration I choose) keep getting unexpected token or undefined symbol errors.
The function is:
killtree()
{
typeset parent=$1
typeset child... (1 Reply)
Hello forum members,
Please wirte a sample program for print the 1 - 100 and 100 -1 using recursive function.
Thanks & regards
Siva Rangnanath (2 Replies)
Discussion started by: workforsiva
2 Replies
LEARN ABOUT DEBIAN
shell-quote
SHELL-QUOTE(1p) User Contributed Perl Documentation SHELL-QUOTE(1p)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)