Very odd. I had tried using letters in place of the numbers I had in the switch/case before, but I could not get it to work.
Single and double quotes are very different things in C. In C, "A" means a string -- amounting to the array { 'A', '\0' }. And 'A' is just the number 65.
Quote:
If I print out the m_array with something like this:
I get back an array of random numbers that I generated from another function:
Then I have another function that should randomly select an element from that array, or for any of the arrays from characters that match, and use one number to replace the letter given. Sorry if that wasn't clear.
Numbers that large won't fit in your input array. chars are numbers, but their range is only -128 through +127. It'll work fine if you use a separate array of type 'int' output.
Dear Members,
I am using SCO-Unix 5.0.5. I have created 2 logical drives but some of the blocks are overlapped and are now giving warning during startup. I have used fsck to settle the problems but to no avail. Kindly help me to sort out the problem.
Thanks (3 Replies)
Hello,everyone here.
I'm coding with KSH to achieve exploring the disk space and judging whether it closes to overflow.But It seems that no one way to convert a string variable to integer.
df | read A B C D E F G H I J K L
print ${L}
Can I convert L to integer type?
Thanks for... (2 Replies)
Hi all,
It will be very useful If you spare some time with me for this worrying error.
I am calling a conversion program which is written in C++ for converting a file format to different format. It was working fine for this past 2 yrs. But now it is not working since the file size has been... (1 Reply)
Hi, I have the next doubt about of lost of characteristic of LV
in my original configuration
# lsvg -l ifxvg
ifxvg:
LV NAME TYPE LPs PPs PVs LV STATE MOUNT POINT
aw64m_01 jfs 1 1 1 open/syncd N/A
aw64m_02 jfs 1... (1 Reply)
I'm getting the following Error:
prepare_pcap.c: In function `prepare_pkts':
prepare_pcap.c:127: error: dereferencing pointer to incomplete type
prepare_pcap.c:138: error: dereferencing pointer to incomplete type
====================================
This is the part of the relevant... (8 Replies)
I have this script to uvscan-update. Seems like that i am getting logical error at the end of the script. It is updating the script and also giving the error message to update it manually. I have deleted the DAT files to see if it will create new and it does. Below is the error and the script: ... (1 Reply)
Hello All,
I have a requirement to convert a 12 hour format to 24 hour time format and the sample input /out put is below
Input Time format : Nov 2 2011 12:16AM
Out Put Format : Nov 2 2011 0:16
Input : Nov 2 2011 4:16PM
Out Put: Nov 2 2011 16:16
I have done this using a... (6 Replies)
In the book "The C programming language"; second edition, chapter 2.7 there is a snippet which is supposed to:
"convert a string of digits into its numeric equivalent".
int atoi(char s)
{
int i, n;
n = 0;
for ( i = 0; s >= '0' && s <= '9'; ++i)
n = 10 * n + (s -... (4 Replies)
Hi All,
I am writing a simple script to read a file and display the lines with char count between 20 and 25. I am stuck with the if condition here. Tried a lot but still getting an error on the if condition
# if &&
if &&
My script is very simple as below, not able to understand... (7 Replies)
Discussion started by: nss280
7 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)