Greetings all,
I'm currently making use of the $HOME/.ssh/rc file to launch an automated shell script immediately after the user has been verified through ssh.
The current problem that I'm facing now is that I am unable to use the "read" command anymore... seems like the "read" statements are... (0 Replies)
I know there are caveats about using read in pipelines because read is treated by a subshell. I know this but I can't think of any way to accomplish this regardless, I'm still a rookie.
I hope somebody will be able to interpret what it is that I'm trying to accomplish and correct me.
... (2 Replies)
Hi All
I have something that from the outset seems really trivial but in practice is not quite working.
I have the following code sample in my shell script which illustrates the problem
echo "enter home directory"
read home
mkdir $home/newdir
The user then enters a logical $HOME... (3 Replies)
Hello All
i have input files contains 2 values as following
20-Oct-09 Z59408009
20-Oct-09 Z59423060
and i am using the following script
cat /home/or/input.txt | awk '{print $2}' >log
count=0
while read line; do
count=$(( count + 1 ))
echo "UPDATE SAT_JRLTRT SET AVT='X' WHERE... (6 Replies)
I cannot get the following substitution ($ORACLE_SID) to work:
The variable ORACLE_SID is set to wardin my environment. It has been exported.
I have a text file called test.dat:
/u07/oradata/${ORACLE_SID}/extab/finmart/summit/ps_voucher_line_crnt_ex.dbf... (2 Replies)
Hi , I have below command to that outputs from variables..
command:
echo $INSTANCE $DATAB $status $TSLastBackup| awk '{printf("%-8s %-8s \t \n",$1,$2,$3,$4)}' | tee $LOGF
the ouput is now:
INSTANCE DATABSE BACKUP_STATUS BACKUPTIMESTAMP
------- -------- -------- ... (1 Reply)
I have a script like this (Yes, I know the DAY6 number isn't right - I'm just testing at this point):
DAY0=`date -I`
DAY1=`date -I -d "1 day ago"`
DAY6=`date -I -d "2 days ago"`
if
then
ssh root@synology1 nohup rm -rf "/volume1/Fileserver/$DAY6"
fi
I've tested the line to remove the... (5 Replies)
Hello
Just edited the entry to make it easier to understand what i want
How can i achieve this: GOAL:
read 2 field from a table with PSQL
result of this PSQL command is this
INSTALLEDLANG=$(su - postgres -c "psql -A -t -q -c -d ${DBNAME} -t -c 'SELECT code, iso_code from res_lang'")
... (0 Replies)
I have several problems with my problems: I hope you can help me.
1) the If else statement I am getting an error message. My syntax must be incorrect because the entire statement is throwing an error.
For example in filew.log if these items don't exist Memsize, SASFoundation and also if... (0 Replies)
Discussion started by: dellanicholson
0 Replies
LEARN ABOUT DEBIAN
readonly::xs
XS(3pm) User Contributed Perl Documentation XS(3pm)NAME
Readonly::XS - Companion module for Readonly.pm, to speed up read-only scalar variables.
VERSION
This document describes version 1.04 of Readonly::XS, December 6, 2005.
SYNOPSIS
Install this module, but do not use it.
DESCRIPTION
The Readonly module (q.v.) is an effective way to create non-modifiable variables. However, it's relatively slow.
The reason it's slow is that is implements the read-only-ness of variables via tied objects. This mechanism is inherently slow. Perl
simply has to do a lot of work under the hood to make tied variables work.
This module corrects the speed problem, at least with respect to scalar variables. When Readonly::XS is installed, Readonly uses it to
access the internals of scalar variables. Instead of creating a scalar variable object and tying it, Readonly simply flips the SvREADONLY
bit in the scalar's FLAGS structure.
Readonly arrays and hashes are not sped up by this, since the SvREADONLY flag only works for scalars. Arrays and hashes always use the tie
interface.
Why implement this as a separate module? Because not everyone can use XS. Not everyone has a C compiler. Also, installations with a
statically-linked perl may not want to recompile their perl binary just for this module. Rather than render Readonly.pm useless for
these people, the XS portion was put into a separate module.
Programs that you write do not need to know whether Readonly::XS is installed or not. They should just "use Readonly" and let Readonly
worry about whether or not it can use XS. If the Readonly::XS is present, Readonly will be faster. If not, it won't. Either way, it will
still work, and your code will not have to change.
Your program can check whether Readonly.pm is using XS or not by examining the $Readonly::XSokay variable. It will be true if the XS
module was found and is being used. Please do not change this variable.
EXPORTS
None.
SEE ALSO
Readonly.pm
AUTHOR / COPYRIGHT
Eric Roode, roode@cpan.org
Copyright (c) 2003-2005 by Eric J. Roode. All Rights Reserved. This module is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
To avoid my spam filter, please include "Perl", "module", or this module's name in the message's subject line, and/or GPG-sign your
message.
perl v5.14.2 2011-11-15 XS(3pm)