Sorry if it is somewhere in the forum, I've checked for an hour or so with my google friend and can't figure this one out. Not counting the 2 hours I spent yelling at it.
Welcome to BASH + AIX
Code:
$LSLV -l $LV | $GREP -v $LV | $GREP -v "IN BAND" | $AWK '{print $1}' | while read PV; do
if [ $ARG = "-all" ]; then
if [ -z "\$${PV}_SIZE" ]; then
eval ${PV}_SIZE="Some weird calculation"
eval echo \$${PV}_SIZE
else
eval echo \$${PV}_SIZE
fi
else
$ECHO "\t\t|_____ - PV: "`$ECHO $PV | $AWK '{print $1}'`
fi
done
In short, I have a list of physical volumes (hdiskX), I want to create a variable hdisk1_size (for example with hdisk1) IF it does not already exists. If it exists, I just want to echo it; only if my $ARG="-all"
I have no idea what is wrong. I've tried wc the amount of letters within the variable, it acts weirdly when put inside the if but works well from the prompt:
Code:
# eval echo \$${PV}_SIZE | wc -m
5
So far I have tried:
Code:
[ -z "\$${PV}_SIZE" ]
It always says it's not empty even if not initialized
Code:
[ `eval echo \$${PV}_SIZE | wc -m` -eq 1 ]
Note that the above will always be at least 1 (?):
Code:
# eval echo \$${UNiX}rAmdOmnEss | wc -m
1
I've tried a bunch of stuff ... I thought my logic might just be wrong but I can't figure another way of doing it.
Hi,
I am new to shell script. This is my first post .I have written a small script which returns list of names starts with "ram" in /etc/passwd .Here is that:-
#!/bin/ksh
NAME_LIST="name_list.txt"
cat /dev/null > $NAME_LIST
evalcmd="cat /etc/passwd | grep "^ram?*" | cut -d: -f1"
eval... (3 Replies)
Hi Friends,
Can any of you explain me about the below line of code?
mn_code=`env|grep "..mn"|awk -F"=" '{print $2}'`
Im not able to understand, what exactly it is doing :confused:
Any help would be useful for me.
Lokesha (4 Replies)
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I have line in input file as below:
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My expected output for line in the file must be :
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:/# /usr/IBMAHS/bin/apachectl -v
Server version: Apache/2.4.12 (Unix)
Server built: May 25 2015 04:58:27
:/#:/# /usr/IBMAHS/bin/apachectl -M
Loaded Modules:
core_module (static)
so_module (static)
http_module (static)
mpm_worker_module (static)
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Discussion started by: penchev
3 Replies
LEARN ABOUT CENTOS
checkbashisms
CHECKBASHISMS(1) General Commands Manual CHECKBASHISMS(1)NAME
checkbashisms - check for bashisms in /bin/sh scripts
SYNOPSIS
checkbashisms script ...
checkbashisms --help|--version
DESCRIPTION
checkbashisms, based on one of the checks from the lintian system, performs basic checks on /bin/sh shell scripts for the possible presence
of bashisms. It takes the names of the shell scripts on the command line, and outputs warnings if possible bashisms are detected.
Note that the definition of a bashism in this context roughly equates to "a shell feature that is not required to be supported by POSIX";
this means that some issues flagged may be permitted under optional sections of POSIX, such as XSI or User Portability.
In cases where POSIX and Debian Policy disagree, checkbashisms by default allows extensions permitted by Policy but may also provide
options for stricter checking.
OPTIONS --help, -h
Show a summary of options.
--newline, -n
Check for "echo -n" usage (non POSIX but required by Debian Policy 10.4.)
--posix, -p
Check for issues which are non POSIX but required to be supported by Debian Policy 10.4 (implies -n).
--force, -f
Force each script to be checked, even if it would normally not be (for instance, it has a bash or non POSIX shell shebang or appears
to be a shell wrapper).
--extra, -x
Highlight lines which, whilst they do not contain bashisms, may be useful in determining whether a particular issue is a false posi-
tive which may be ignored. For example, the use of "$BASH_ENV" may be preceded by checking whether "$BASH" is set.
--version, -v
Show version and copyright information.
EXIT VALUES
The exit value will be 0 if no possible bashisms or other problems were detected. Otherwise it will be the sum of the following error val-
ues:
1 A possible bashism was detected.
2 A file was skipped for some reason, for example, because it was unreadable or not found. The warning message will give details.
SEE ALSO lintian(1).
AUTHOR
checkbashisms was originally written as a shell script by Yann Dirson <dirson@debian.org> and rewritten in Perl with many more features by
Julian Gilbey <jdg@debian.org>.
DEBIAN Debian Utilities CHECKBASHISMS(1)
03-20-2013
Dynamic variables and our friend "if"
