There is no need to put void as function arguements.
Not necessarily so...
In ANSI C, the following happens...
1. if the return type is empty it is considered an 'int'.
2. if the function has a void or a list of arguments those are the arguments that the compiler will check against.
3. if the argument list is empty it is effectively saying "I don't know what the arguments are" and you can call it with any arguments you like and may only get a warning. It is equivalent of ellipses, (...)
There may only be a warning only for the "myz(1)".
Hello Friends,
I am learning Perl now. I have a small query.
I have a directory Z with file name Z.txt.
I would like to copy this file Z.txt to 3 new dir with new filenames as follows
dir 1 1.txt
dir 2 2.txt
dir 3 3.txt
I would like to then open 1.txt from dir 1 and edit the first... (0 Replies)
Hi All
Im trying to access the my windows XP NTFS from Redhat linux 4.0 Enterprise edition
I have downloaded the respective rpm
And im able to install it successfully
Then i have given the following command , but got an error
Here are my partitions
And when i give the below... (1 Reply)
Hi,
I am using Tk module in perl 5.6 and it is working fine. Now when i installed the newer version 5.10.0 then getting error that Tk module not found. But i will have to work on this newer verison only to use some other modules of perl.
I want to know why Tk module is not working in newer... (6 Replies)
Hi masters,
I am new to linux and unix forum and this is my first forum. So please excuse if
I am not giving sufficient information. I will give them on request.
I have created a bandwidth manager module. I am using a 2.6.9 kernel and in Red Hat 3.4.3 distribution. But when i run make... (1 Reply)
I have one big module 2.6.18 kernel mod.c
I want to divide this to several files.
The problem is to write right Makefile
lib1.h
lib1.c
mod.c
mod.c works fine normally but when I divide into several files
and try to compile with this makefile
obj-m := mod.o
mod-objs := lib1.o
... (3 Replies)
I'd like to install cpufreq modules on my server .
I tried
sudo modprobe acpi-cpufreq
but got the error
FATAL: Error inserting acpi_cpufreq (/lib/modules/2.6.18-238.12.1.el5xen/kernel/arch/x86_64/kernel/cpufreq/acpi-cpufreq.ko): No such device
cat /proc/cpuinfo gives this
... (11 Replies)
Hi,
I have used pdftotext with good results in the past, but today for some reason I keep getting the same error message.
My command is as follows:
And the error message is
I am using Vmware player with Ubuntu server, but I don't think that is causing this issue as I have been using... (2 Replies)
Hi 'm getting error while installing perl mdule on linux.can any one tell me how to resolve that error?
problem is:
CPAN: File::Temp loaded ok (v0.22)
CPAN.pm: Going to build J/JD/JDB/Win32-OLE-0.1709.tar.gz
OS unsupported
Warning: No success on command
Warning (usually harmless):... (1 Reply)
Discussion started by: kavi.mogu
1 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)