I have the following statement in script:
find ${LANDING_FILE_DIR}${BTIME_FILENAME_PATTERN2} -print | while read file; do
...
done
When there are no files located by the find comand it returns:
"find: bad status-- /home/rnitcher/test/....." to the command line
How do I get control in... (3 Replies)
Hi,
I am beginer to Linux. I have installed Redhat Linux AS 4.0 on my System.Later I created a User Oracle10g for Installing Oracle.Then I logged onto Oracle10g user and crated a Bash Profile and when I run that profile there was an error in that Profile. from then If I type any of Linux Command... (2 Replies)
Hi,
I have a strange problem and I'm sure its because I'm doing something stupid.
When I loop through all of the files in a directory they cannot be found.
Any help would be greatly appreciated.
Thanks,
-E
$ touch a.txt
$ touch b.txt
$ ls
a.txt b.txt
$ for f in `ls` ; do... (3 Replies)
I'm guessing i have a syntax error. I'm not sure it get's past the the while condition. I get an error 0 not found. Simple loop not sure what I'm doing wrong.
#!/usr/bin/ksh
set -A MtPtArray /u03 /u06
tUbound=${#MtPtArray
}
echo $tUbound
i=0
while ($i -lt $tUbound)
do
print... (4 Replies)
Hello everyone,
I am using Linux and tcsh shell. I am trying to run a free open source program( which is in the form of a binary file), but every time I run it it gives me an error saying:
newhtsg_v1.0:Command not found.
I have set permission also for the same.
What else can I do to make... (4 Replies)
I have a program called abc installed in /usr/local/bin.
My path is as follows:
# echo $PATH
/sbin:/bin:/usr/sbin:/usr/bin:/usr/games:/usr/local/sbin:/usr/local/bin:/root/bin
However, when entering the abc command, the following error appears:
# abc
abc: Command not found
When... (7 Replies)
I installed in VM the Mandriva Linux.
But when I fire the make command it gives me command not found error.
Seems make is not installed.
I also checked in Mandriva control center and no development package is seen there.
Will pls let me know how to proceed and get make and other development... (2 Replies)
$ cat nu
who | wc -l
$ ls -l nu
-rwxr-x--- 1 _ _ 11 Jul 30 12:37 nu //the nu is displayed in green color
$ nu
bash: nu: command not found
I am using a book from 1986 on Unix System V, Release 3, and the Unix system I am connecting to is from my college.
Below is the notes from the book:... (4 Replies)
Could you let me know if my path is having bourne bash
echo $PATH
/u01/app/oracle/product/10.2.0/db_1/bin:/usr/sbin:/usr/kerberos/bin:/usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin:/home/oracle/bin
$ which bash
/bin/bash
$ which ls
alias ls='ls --color=tty'
/bin/ls
Below is... (3 Replies)
I am unable to use the value of a variable.
while ]
do
LstFldDataPart =`head -n "$LstFldDataPartCntr" "${FeedFileDir}/${FeedFileBadRecs}" | tail -1 | tr -d '\n'`
echo $LstFldDataPart
JndLstFldDataPart="${JndLstFldDataPart}${LstFldDataPart}"
LstFldDataPartCntr=... (3 Replies)
Perl::Critic::Policy::ErrorHandling::RequireCheckingRetuUserlContributed PPerl::Critic::Policy::ErrorHandling::RequireCheckingReturnValueOfEval(3)NAME
Perl::Critic::Policy::ErrorHandling::RequireCheckingReturnValueOfEval - You can't depend upon the value of "$@"/"$EVAL_ERROR" to tell
whether an "eval" failed.
AFFILIATION
This Policy is part of the core Perl::Critic distribution.
DESCRIPTION
A common idiom in perl for dealing with possible errors is to use "eval" followed by a check of $@/$EVAL_ERROR:
eval {
...
};
if ($EVAL_ERROR) {
...
}
There's a problem with this: the value of $EVAL_ERROR can change between the end of the "eval" and the "if" statement. The issue is object
destructors:
package Foo;
...
sub DESTROY {
...
eval { ... };
...
}
package main;
eval {
my $foo = Foo->new();
...
};
if ($EVAL_ERROR) {
...
}
Assuming there are no other references to $foo created, when the "eval" block in "main" is exited, "Foo::DESTROY()" will be invoked,
regardless of whether the "eval" finished normally or not. If the "eval" in "main" fails, but the "eval" in "Foo::DESTROY()" succeeds,
then $EVAL_ERROR will be empty by the time that the "if" is executed. Additional issues arise if you depend upon the exact contents of
$EVAL_ERROR and both "eval"s fail, because the messages from both will be concatenated.
Even if there isn't an "eval" directly in the "DESTROY()" method code, it may invoke code that does use "eval" or otherwise affects
$EVAL_ERROR.
The solution is to ensure that, upon normal exit, an "eval" returns a true value and to test that value:
# Constructors are no problem.
my $object = eval { Class->new() };
# To cover the possiblity that an operation may correctly return a
# false value, end the block with "1":
if ( eval { something(); 1 } ) {
...
}
eval {
...
1;
}
or do {
# Error handling here
};
Unfortunately, you can't use the "defined" function to test the result; "eval" returns an empty string on failure.
Various modules have been written to take some of the pain out of properly localizing and checking $@/$EVAL_ERROR. For example:
use Try::Tiny;
try {
...
} catch {
# Error handling here;
# The exception is in $_/$ARG, not $@/$EVAL_ERROR.
}; # Note semicolon.
"But we don't use DESTROY() anywhere in our code!" you say. That may be the case, but do any of the third-party modules you use have them?
What about any you may use in the future or updated versions of the ones you already use?
CONFIGURATION
This Policy is not configurable except for the standard options.
SEE ALSO
See thread on perl5-porters starting here: <http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2008-06/msg00537.html>.
For a nice, easy, non-magical way of properly handling exceptions, see Try::Tiny.
AUTHOR
Elliot Shank "<perl@galumph.com>"
COPYRIGHT
Copyright (c) 2008-2011 Elliot Shank.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. The full text of this license
can be found in the LICENSE file included with this module.
perl v5.16.32014-0Perl::Critic::Policy::ErrorHandling::RequireCheckingReturnValueOfEval(3)