I try to test the carriage return in a variable.
$ LENGTH=`expr $VARIABLE : ".*"` will return the length of the variable. But this doesn't work if $VARIABLE has zero length.
Any help will be well appreciated.
Thanks in advance.
Giovanni (4 Replies)
I have observed with print & echo, they produce carriage return <CR> or newline, after they display string next to them.
Is there anyway to avoide these <CR> after the intended string is displayed? (3 Replies)
hi ALL,
bash-3.00$ echo $BASH_VERSION
3.00.16(1)-release
I'm stumped on a bug. Im extracting a checksum value at the end of a file and storing it in a variable, the problem is that it is also somehow storing the carriage return in the string as show below:
The variables below both... (4 Replies)
Hi all,
need your help in replacing carriage return in a record.
Input:
col1|col2|col3|col4|col5|col6|col7|col8|col9|col10
1|aa|bb|cc|dd|eee
eee|ff|ggggg|hh
hhh|iii
2|zz|yy|xx|ww|vv|uu|tt|ss|rr
Output:
col1|col2|col3|col4|col5|col6|col7|col8|col9|col10... (12 Replies)
Hey folks,
I've been working on this for some time. Seems simple, but I'm stumped.
I need the following data format:
New_York:Commercial
Geology
Geophysics
Petrophysics
Production_Engineering
Reservoir_Engineering
Pasadena:Commercial
... (5 Replies)
Hello,
How do i usecarriage return in ksh.
I want to do an echo "bla bla" and another echo "bla bla" will appear and replace the first echo on screen.
I tried:
until ; do
echo "bla bla \r"
done
please advice.
Thanks. (3 Replies)
Hi,
I try to handle very large numbers with a bash script. I run ssh command in a remote server and store the output in a local variable. But this output contains a return carriage at the end. So I try to remove it by tr But I can't figure out the right notation with printf. So my problem... (6 Replies)
I need to remove the carriage return comes inbetween the record.
Need to have CR only at the end.
I used the below command.
tr -d '\n' < filewithcarriagereturns > filewithoutcarriagereturns
But its removing all the CR and giving one line output.
Input File:
12345
abcdegh... (11 Replies)
Discussion started by: srvn_saru
11 Replies
LEARN ABOUT PHP
readline_callback_handler_install
READLINE_CALLBACK_HANDLER_INSTALL(3) 1 READLINE_CALLBACK_HANDLER_INSTALL(3)readline_callback_handler_install - Initializes the readline callback interface and terminal, prints the prompt and returns immediatelySYNOPSIS
bool readline_callback_handler_install (string $prompt, callable $callback)
DESCRIPTION
Sets up a readline callback interface then prints $prompt and immediately returns. Calling this function twice without removing the previ-
ous callback interface will automatically and conveniently overwrite the old interface.
The callback feature is useful when combined with stream_select(3) as it allows interleaving of IO and user input, unlike readline(3).
PARAMETERS
o $prompt
- The prompt message.
o $callback
- The $callback function takes one parameter; the user input returned.
RETURN VALUES
Returns TRUE on success or FALSE on failure.
Example #1
Readline Callback Interface Example
<?php
function rl_callback($ret)
{
global $c, $prompting;
echo "You entered: $ret
";
$c++;
if ($c > 10) {
$prompting = false;
readline_callback_handler_remove();
} else {
readline_callback_handler_install("[$c] Enter something: ", 'rl_callback');
}
}
$c = 1;
$prompting = true;
readline_callback_handler_install("[$c] Enter something: ", 'rl_callback');
while ($prompting) {
$w = NULL;
$e = NULL;
$n = stream_select($r = array(STDIN), $w, $e, null);
if ($n && in_array(STDIN, $r)) {
// read a character, will call the callback when a newline is entered
readline_callback_read_char();
}
}
echo "Prompting disabled. All done.
";
?>
readline_callback_handler_remove(3), readline_callback_read_char(3), stream_select(3).
PHP Documentation Group READLINE_CALLBACK_HANDLER_INSTALL(3)