04-22-2011
table is a database table
Quote:
Originally Posted by
Corona688
Tell us more about this table. Is it a file? A data structure?
8 More Discussions You Might Find Interesting
1. Programming
in the header file orville.h, outside of the #ifdef #endif , there is the following
#define JOB_CONTROL /* support job-control */
As you can see, the JOB_CONTROL macro has no value associated with it. Here is what I go when I ran grep on the entire source code.
$ grep -iR... (6 Replies)
Discussion started by: frequency8
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2. UNIX for Dummies Questions & Answers
Hi friends,
I am not sure if perl questions can be raised here. :rolleyes:
But I have a doubt if there is a way to do "#define" in perl, like in C.
Does anyone know if it is feasible (without CPAN modules)?
Thanks,
Srini (7 Replies)
Discussion started by: srinivasan_85
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3. Programming
Hello!!
I need to do some performance test using a very big matrix (bi-dimensional array) but I have problems with this.
Is there any limitation in declarations? because if I do this:
int matriz;
It just don't work... it compiles but when i run the program it just closes.
Where can i... (4 Replies)
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4. Shell Programming and Scripting
Hello,
I would like to define a variable based on another variable:
a=5
b$a=100
This does not work. What is the right way to do it?
Thanks
---------- Post updated at 07:37 PM ---------- Previous update was at 07:33 PM ----------
Found my answer with the search function (did not... (0 Replies)
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5. Programming
Hello,
I would like to conditionaly comment in my code source some fields from arrays. So I use the property ## from the #define definition.
my code:
...
#define slet /##*
#define etsl *##/
...
const T_SVT_ADLL_A653_DESC A_DESC =
{
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6. Programming
if i do this in C
#define NUM 1234512345
then how come i cant print it out using
int main(int argc, char **argv) {
printf("%d\n", NUM);
return 0;
}
well the result is -1219236538, why isnt it 1234512345 ? (7 Replies)
Discussion started by: omega666
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7. Programming
Hey everyone. So I'm looking at a few C programming resources, and it seems, by convention how you should write and define a function, is first declare it's existence before your main...then call it somewhere in your main, and then define after, at the end of the program? Is this necessary? I mean... (7 Replies)
Discussion started by: Lost in Cyberia
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8. Shell Programming and Scripting
Hi,
I just define the variable in script and use those script in another script but the variable not recognize.
test1.sh
#!/bin/bash
DB="test_db"
USR="test_user"
PWD="test_pwd"
HST="24.254.87.12"
test2.sh
#!/bin/bash
./test1.sh
mysql -u $USR -p $PWD -h $HST... (2 Replies)
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LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)
NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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 v5.16.3 2010-06-11 SHELL-QUOTE(1)