The most important thing for me was here to have a version of a command with an option that is as short as possible, so it's convenient to use it.
And on a second thought, I think environment variables are not such a good way to use in general. I appreciate explicit parameter handover more since external dependencies and data access is not hiden in the code but directly visible at a program call.
And I would better write such script in a single file now:
Code:
#!/bin/sh
[ "$1" = "-q" ] && DEBUG=0 || DEBUG=1
mysql -e 'SHOW SLAVE STATUS \G' | awk -v DEBUG=${DEBUG} '
#
# awk program here
#
...
'
Hi!
How-to get the environment variables in GNU.
getenv() only fetches the ones that you can find under export (not the ones under declare)...
best regars .David (2 Replies)
hi,
I want to create a new EV(Environment Variable) through a c program and I done this thing through setenv() method. But the newly created EV is not permanent, i.e. when I exit from the program the EV also no longer lives. But I want to make it a permanent EV for the current user. Actually I... (6 Replies)
say i define an environment variable in a particular script (upgrade.sh).
my script is upgarde.sh and it calls another script try.sh. will this environment variable be accessible to try.sh also. if not how to I make environment variables global so that they can be used by any script. (2 Replies)
Hi all,
I have a file contain 100 lines xml. Would like to get the note value of special attribute. Could anyone help?
input:
<a>1</a><b>2</b><c>3</c><d>4</d><e>5</e><f>64</f>
<a>1</a><b>2</b><c>33</c><d>4</d><e>56</e><f>63</f>
<a>1</a><b>2</b><c>66</c><d>4</d><e>58</e><f>62</f>... (3 Replies)
Hi Experts,
Need your help in understanding the commands to setup the environment variables in hp-ux.
Beleive need to use either set,setenv or export.
I am confused between above three options, when to use which option?
On command line, I have tried both set and setenv but couldn't... (1 Reply)
1. The problem statement:
What is the mesg value set for your environment? If it is on, how would you turn off your current
session? How would you set it permanently?
3. The attempts at a solution :
Read Unix The textbook.
3rd chapter has many things like environment variables and... (5 Replies)
Hi All,
I need to understand following three environment variables and their usages in HP Unix.
_M_ARENA_OPTS
_M_CACHE_OPTS
PTHREAD_SCOPE_SYSTEM
How does these environment variables influence multi threaded applciation and how do we decide the value of these variables? Is there... (0 Replies)
Discussion started by: angshuman
0 Replies
LEARN ABOUT SUSE
log::log4perl::level
Level(3) User Contributed Perl Documentation Level(3)NAME
Log::Log4perl::Level - Predefined log levels
SYNOPSIS
use Log::Log4perl::Level;
print $ERROR, "
";
# -- or --
use Log::Log4perl qw(:levels);
print $ERROR, "
";
DESCRIPTION
"Log::Log4perl::Level" simply exports a predefined set of Log4perl log levels into the caller's name space. It is used internally by
"Log::Log4perl". The following scalars are defined:
$OFF
$FATAL
$ERROR
$WARN
$INFO
$DEBUG
$TRACE
$ALL
"Log::Log4perl" also exports these constants into the caller's namespace if you pull it in providing the ":levels" tag:
use Log::Log4perl qw(:levels);
This is the preferred way, there's usually no need to call "Log::Log4perl::Level" explicitely.
The numerical values assigned to these constants are purely virtual, only used by Log::Log4perl internally and can change at any time, so
please don't make any assumptions.
If the caller wants to import these constants into a different namespace, it can be provided with the "use" command:
use Log::Log4perl::Level qw(MyNameSpace);
After this $MyNameSpace::ERROR, $MyNameSpace::INFO etc. will be defined accordingly.
Numeric levels and Strings
Level variables like $DEBUG or $WARN have numeric values that are internal to Log4perl. Transform them to strings that can be used in a
Log4perl configuration file, use the c<to_level()> function provided by Log::Log4perl::Level:
use Log::Log4perl qw(:easy);
use Log::Log4perl::Level;
# prints "DEBUG"
print Log::Log4perl::Level::to_level( $DEBUG ), "
";
To perform the reverse transformation, which takes a string like "DEBUG" and converts it into a constant like $DEBUG, use the to_priority()
function:
use Log::Log4perl qw(:easy);
use Log::Log4perl::Level;
my $numval = Log::Log4perl::Level::to_priority( "DEBUG" );
after which $numval could be used where a numerical value is required:
Log::Log4perl->easy_init( $numval );
COPYRIGHT AND LICENSE
Copyright 2002-2009 by Mike Schilli <m@perlmeister.com> and Kevin Goess <cpan@goess.org>.
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
perl v5.12.1 2010-02-07 Level(3)