All,
I have a requirement to write a script where I check for Input redirection when the script was executed, based on which I handle my logic. Below is the example:
my.script
#! /bin/ksh
# Not sure how to frame the if condition below
if ; then
echo "Input Redirected from a file"
... (7 Replies)
Suppose we have a simple situation, like the following C++ instructions:
int x;
cout << "Insert x: ";
cin >> x;
while ( x-- < 0 ) ;
Of course, if it is written something different from an integer, the while loop shall not end.
So, how can we check if the input x is of the right type? (2 Replies)
Hi all
i need to check that if user has passed any input parameter while executing he shell script like
./test1.sh -a"-v"
then do smothing
if user execute the script without giving input paramater then
./test1.sh
then do something
how can we check this input parameter (6 Replies)
Hi,
I have a script which runs daily. It gets 3 input files test1,test2,test3. I want to do a validation in my script to make sure i have all the 3 files available before running. If any one of the file is missing i want to break the script.
Could you please help me with this request.
... (1 Reply)
Hi Guys
I have a Requirement that the input will be given and i have to check whether the input is a Year or not.
For Example
2004,2009 and so on forth will be considered a year and anything else like
12:15 or else will not be.
Have built the below Code
set -x
echo " Enter... (6 Replies)
Hi,
I need my script to check if the user enters 3 values if not 5 values to my script and alert if the input has any other number of values.
for example:
./myscript.sh 22 56 3221 - > correct
./myscript.sh 22 56 3221 45 777 -> correct
./myscript.sh 22 56 3221 45 -> incorrect
Please... (6 Replies)
I have a file which extracts data from an HTML file
For Eg HTML file contains:
New York;ABC;145;Yes;YES;No
New York;BCD;113;Yes;YES;No
New York;NAS;63;Yes;YES;No
------------------------
London-48;CBT;16;Yes;YES;No
London-48;CME;17;Yes;YES;No
London-48;EUR;52;Yes;YES;No... (7 Replies)
Hello there, find below for my code first:
$pdp_asaba=`cat /tmp/temp_total | grep asaba | sed 's/*//g'`
if ]]
then pdp_asaba=0
fi
$pdp_abuja=`cat /tmp/temp_total | grep abuja | sed 's/*//g'`
if ]]
then pdp_abuja=0
fi
$pdp_ojota=`cat /tmp/temp_total | grep ojota | sed 's/*//g'`
if ... (3 Replies)
Discussion started by: infinitydon
3 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)