shift $(($OPTIND - 1)) arguments along
for ex shift 2 which shift 2 arguments along
$1 get the value of $3,$2 get the value of $4
A here document is a special−purpose code block. It uses a form of I/O redirection to feed a command list to an interactive program or a command( here it is cat ).
A limit string(here EOF) delineates the command list. The special symbol << designates the limit string.
Hi,
I'd like to access a windows directory from aix with samba client.
To allow direct access (not interactive), i'm using EOF like:
smbclient \\\\winserver\\windir 'passwd' -U usersmb << EOF
cd subwindir
put myfile
EOF
The access is correct but does somebody know how to trap errors... (1 Reply)
Hello, you are an awesome crowd! You answered my last questions, thank you sooo much!
I am trying to write a korn shell script that will record the memory my application is using (HP-UX B.11.11) and I have this:
if (( $APP > $THRESHOLD ))
then
echo "Warning message will display"
cat... (2 Replies)
How to check for a premature EOF in a regular file in a shell/perl script?
I want to check if I have received a complete file or not.
Thanks,
Rahul. (12 Replies)
I have written this code:
code
echo 'Now choose the file or files you want to merge your input with: \c'
read filenames
filelist=""
for file in $filenames; do
filelist="$filelist $file"
done
echo "Now that you've chosen these files ($filelist), please start typing: "
until ; do
paste -... (2 Replies)
Hello all,
I have unix file that ends with the following EOF '9999999999'
I want to remove the '\n' character after EOF. What is the command that should be included in the script, before sending the file?
will this work:
$ echo "<99999999999>\c" >> <filename>
thanks in advance. (3 Replies)
I'm trying to connect to oracle with the following code in the script:
checksqlerror{
if
echo $1
exit
fi
}
$SQLPLUS username/password@schemaname
checksqlerror "failed to connect to oracle"
If I'm passing wrong schema name,instead of executing checksqlerror it stops and expects user... (2 Replies)
How can I write EOF into a file?
I tryed to do as follows:
size=sizeof(EOF);
end_of_file=EOF;
write(fdMutexRichieste, &end_of_file, size);
But it does non work correctly,
becouse in the next cicle (using lseek(..., SEEK_END) of my code it seems to ignore my EOF and use the LAST... (5 Replies)
Hey!
Can I write a routine that allows me to in a txt file check line by line until the end of file?
something like
until do
---some code---
done
maybe it is a stupid question but I never learned shell scripts and I need this :p
thanks in advance (1 Reply)
Hi friends ,
I am confused with << EOF
EOF
Most of the cases I found
sqlplus $db_conn_str << EOF
some sql staments
EOF
another exapmle is
#!/bin/sh
echo -n 'what is the value? '
read value
sed 's/XXX/'$value'/' <<EOF
The value is XXX
EOF (1 Reply)
Discussion started by: imipsita.rath
1 Replies
LEARN ABOUT DEBIAN
devel::refcount
Devel::Refcount(3pm) User Contributed Perl Documentation Devel::Refcount(3pm)NAME
"Devel::Refcount" - obtain the REFCNT value of a referent
SYNOPSIS
use Devel::Refcount qw( refcount );
my $anon = [];
print "Anon ARRAY $anon has " . refcount($anon) . " reference
";
my $otherref = $anon;
print "Anon ARRAY $anon now has " . refcount($anon) . " references
";
DESCRIPTION
This module provides a single function which obtains the reference count of the object being pointed to by the passed reference value.
FUNCTIONS
$count = refcount($ref)
Returns the reference count of the object being pointed to by $ref.
COMPARISON WITH SvREFCNT
This function differs from "Devel::Peek::SvREFCNT" in that SvREFCNT() gives the reference count of the SV object itself that it is passed,
whereas refcount() gives the count of the object being pointed to. This allows it to give the count of any referent (i.e. ARRAY, HASH,
CODE, GLOB and Regexp types) as well.
Consider the following example program:
use Devel::Peek qw( SvREFCNT );
use Devel::Refcount qw( refcount );
sub printcount
{
my $name = shift;
printf "%30s has SvREFCNT=%d, refcount=%d
",
$name, SvREFCNT($_[0]), refcount($_[0]);
}
my $var = [];
printcount 'Initially, $var', $var;
my $othervar = $var;
printcount 'Before CODE ref, $var', $var;
printcount '$othervar', $othervar;
my $code = sub { undef $var };
printcount 'After CODE ref, $var', $var;
printcount '$othervar', $othervar;
This produces the output
Initially, $var has SvREFCNT=1, refcount=1
Before CODE ref, $var has SvREFCNT=1, refcount=2
$othervar has SvREFCNT=1, refcount=2
After CODE ref, $var has SvREFCNT=2, refcount=2
$othervar has SvREFCNT=1, refcount=2
Here, we see that SvREFCNT() counts the number of references to the SV object passed in as the scalar value - the $var or $othervar
respectively, whereas refcount() counts the number of reference values that point to the referent object - the anonymous ARRAY in this
case.
Before the CODE reference is constructed, both $var and $othervar have SvREFCNT() of 1, as they exist only in the current lexical pad. The
anonymous ARRAY has a refcount() of 2, because both $var and $othervar store a reference to it.
After the CODE reference is constructed, the $var variable now has an SvREFCNT() of 2, because it also appears in the lexical pad for the
new anonymous CODE block.
PURE-PERL FALLBACK
An XS implementation of this function is provided, and is used by default. If the XS library cannot be loaded, a fallback implementation in
pure perl using the "B" module is used instead. This will behave identically, but is much slower.
Rate pp xs
pp 225985/s -- -66%
xs 669570/s 196% --
SEE ALSO
o Test::Refcount - assert reference counts on objects
AUTHOR
Paul Evans <leonerd@leonerd.org.uk>
perl v5.14.2 2011-11-15 Devel::Refcount(3pm)