The shells do no seem to support this very well.
Normally I would do this kind of tasks with expect.
My experience is that one has to mimic the time behavior of the program that
expects something from standard input.
You may try replacing the simple printf by this subshell expression:
Hello,
I'm trying to create a shell variable with newlines inside it, so that when I echo the variable and pipe it to, say, awk, it output with the newlines. Why is this so problematic? I frankly don't know, but BASH seems to be stripping my variable of newlines. Here's an example
$ cat... (5 Replies)
Hi Guys,
I have data in a file as follows:
a 1 2 3
b 4 5 6
a 6 7 8
a 4 7 9
b 6 8 5
c 0 8 7
So the number of rows which have data is variable (2 for the first group, one for the second group and three for the third group), but the delimiters between the... (10 Replies)
Hello, there. I have a file that's a horrible, horrible mess. (Basically, it's an export from a firewall config.) The people who generated the file didn't think that putting a newline in the middle of a hostname would ever be a problem. It is.
Here's an example of the stuff in the file:
... (2 Replies)
I have a file that has lines that are deliminated with '^A', but some of the lines go for a few lines and I need those lines to be appended into one line.
All of the lines start with 'low debug' and end with ' " 0 '.
How can I read each line from start to finish without some of the data... (7 Replies)
Hello! This is my first post here.
I have a file with text like:
A</title>
B
C</title>
D
I need to format it to:
AB
CD
I am trying to use sed: sed 's/<//title>\n/ /g' file > newfile
to delete </title> and the newline character, but the file is unchanged because there are... (3 Replies)
Good afternoon,
I am trying to read user input.
Here is what I have so far:
echo "Type the Container ID for every container that you want subnets exported"
echo "for (with comma between each one, for example... 1,45,98)"
echo -n "if you want every one listed, then just type ALL in caps... (2 Replies)
Hi buddy's
my file are like this:
s.no,name,band,sal
1,"suneel",,10
2,"bargav
sand",,20
30,"
ebdug gil",,4
but i want
s.no,name,band,sal
1,"suneel",,10
2,"bargav sand",,20
30,"ebdug gil",,4
any command or Shell script for this.
please help me it's urgent to implement (33 Replies)
Hi All -
I am in need of some help in formating the below file
Requirement -
1) replace newlines with space
2) replace '#~# ' with newline
-----------------------
sample inputfile a
I|abc|abc|aaa#~#
I|sddddd|tya|dfg
sfd
ssss#~#
I|tya1|tya2|dfg|sfd|aaa#~#... (5 Replies)
I'm on Ubuntu 14.04 and I manually updated my coreutils so that "tee" is now on version 8.27
I was running a script using bash where there is some write to pipe error at some point causing the tee command to exit abruptly while the script continues to run. The newer version of tee seems to prevent... (2 Replies)
Hi Friends,
I have a data file with new lines.
How to remove the newlines and should be showed in one line.
I tried using the command
tr -d '\n' filename
sed 's/\n//g' file name
Ex: 1 abc hyd is actual record
but in our scenario showing it as
1 abc
hydthis record should be like... (5 Replies)
Discussion started by: victory
5 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)