I am not an expert of shell scripting, but I can do some simple things. Now, I read a script written by others and I need some help from the experts of this forum.
Please help me to understand what is going on in this cycle:
In particular, I do not understand this synax: [[...]] && \ export... ||,
where the || operand is used after the export command. It rise by me the question if the export command return any Boolean value?
i have this program in bash shell:
#!/bin/bash
array=(20 20 20 20 20)
i=0
j=0
awk '/%/ {print $3}' try.txt|
while (read s)
arr=$s
i=`expr $i + 1`
echo "$i"
end
how can i convert this into c shell? (1 Reply)
Discussion started by: npatwardhan
1 Replies
4. Post Here to Contact Site Administrators and Moderators
Where can I download the VTC - Unix Shell Scripting Advanced complete video.
I don't know in which thread I should post this question.Plz help me out, or just tell me the link in the reply to this post.
Thanks in advance. (0 Replies)
Hi all, i have more questions but its all about variables so lets begin
1st, is possible to list all variables ?
Command env display only shell variables, but what if i declared another variable? Command set display more variables but not defined by me.
2nd, what difference is between set... (24 Replies)
Hello,
I'm working on unix with grep (GNU grep) 2.5.1. I'm going through some of the newer regex syntax using Regular Expression Reference - Advanced Syntax a guide.
ls -aLl /bin | grep "\(x\)"
Which works, just highlights 'x' where ever, when ever.
I'm trying to to get (?:) to work but... (4 Replies)
Hi all
I've got a question regarding error handling in shell scripts. My background is mainly object oriented programming languages, but for a year or so I've been doing more and more (bash) shell scripting (which I quite enjoy by the way).
To handle errors in my scripts I... (3 Replies)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
I am working on a hands on project. We are creating a script for a corporate phone list. The project I am... (2 Replies)
Hi Folks -
I need help converting a piece of code from batch to bash.
Here is the code:
FOR /f "eol=; tokens=1,2,3,4 delims=, " %%i in (Update_Subvars.txt) do (
ECHO alter database %%i.%%j set variable %%k %%l;
)
What it's doing is retrieving the values from this file:
... (2 Replies)
Hello,
I have a newbe syntax error but I cant find it
syntax error: unexpected end of file
#!/bin/csh
# pe request
#$ -pe mpi_16 32
#### 16 core : 'mpi_16 16' || 24 core : 'mpi_24 24 '
# our Job name
#$ -N test2MD
#$ -S /bin/sh (1 Reply)
Discussion started by: dulceC
1 Replies
LEARN ABOUT DEBIAN
perl6::export
Export(3pm) User Contributed Perl Documentation Export(3pm)NAME
Perl6::Export - Implements the Perl 6 'is export(...)' trait
SYNOPSIS
# Perl 5 code...
package Some::Module;
use Perl6::Export;
# Export &foo by default, when explicitly requested,
# or when the ':ALL' export set is requested...
sub foo is export(:DEFAULT) {
print "phooo!";
}
# Export &var by default, when explicitly requested,
# or when the ':bees', ':pubs', or ':ALL' export set is requested...
# the parens after 'is export' are like the parens of a qw(...)
sub bar is export(:DEFAULT :bees :pubs) {
print "baaa!";
}
# Export &baz when explicitly requested
# or when the ':bees' or ':ALL' export set is requested...
sub baz is export(:bees) {
print "baassss!";
}
# Always export &qux
# (no matter what else is explicitly or implicitly requested)
sub qux is export(:MANDATORY) {
print "quuuuuuuuux!";
}
sub import {
# This subroutine is called when the module is used (as usual),
# but it is called after any export requests have been handled.
# Those requests will have been stripped from its argument list
}
DESCRIPTION
Implements what I hope the Perl 6 symbol export mechanism might look like.
It's very straightforward:
o If you want a subroutine to be capable of being exported (when explicitly requested in the "use" arguments), you mark it with the "is
export" trait.
o If you want a subroutine to be automatically exported when the module is used (without specific overriding arguments), you mark it with
the "is export(:DEFAULT)" trait.
o If you want a subroutine to be automatically exported when the module is used (even if the user specifies overriding arguments), you
mark it with the "is export(:MANDATORY)" trait.
o If the subroutine should also be exported when particular export groups are requested, you add the names of those export groups to the
trait's argument list.
That's it.
WARNING
The syntax and semantics of Perl 6 is still being finalized and consequently is at any time subject to change. That means the same caveat
applies to this module.
DEPENDENCIES
Requires Filter::Simple
AUTHOR
Damian Conway (damian@conway.org)
BUGS AND IRRITATIONS
Does not yet handle the export of variables.
Comments, suggestions, and patches welcome.
COPYRIGHT
Copyright (c) 2003, Damian Conway. All Rights Reserved.
This module is free software. It may be used, redistributed
and/or modified under the same terms as Perl itself.
perl v5.8.8 2008-03-12 Export(3pm)