07-06-2011
Methyl -- and anyone else:
It's been a while since I've been here, but I've got something else.
I fooled around with some other scripts and got it to print a message -- are you getting it to display the message?
Here's a script that I did today:
Quote:
trap "echo 'You interrupted me.' " SIGINT
let x=0
while true; do
echo $x
let x=x+1
done
It works fine -- the numbers zip by and get larger and larger. If I hit control - c I can see the message -- it's only a flash. If I put sleep 10 in the script after the echo command,and hit control-c, all I get is ^C displayed on the screen, but no message. I'm wondering if the message is displayed briefly, but so quickly that I can't see it. Am I not typing the command correctly and not noticing it, maybe?
If i try this script
Quote:
trap "echo 'You interrupted me.' " SIGINT
while true; do
echo enter a number
read x
echo $x
done
It works fine. The message is displayed:
Quote:
enter a number
ths
ths
enter a number
^CYou interrupted me.
I think it has something to do with the sleep command, but I can't figure out why. Do you have any ideas?
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LEARN ABOUT PHP
time_nanosleep
TIME_NANOSLEEP(3) 1 TIME_NANOSLEEP(3)
time_nanosleep - Delay for a number of seconds and nanoseconds
SYNOPSIS
mixed time_nanosleep (int $seconds, int $nanoseconds)
DESCRIPTION
Delays program execution for the given number of $seconds and $nanoseconds.
PARAMETERS
o $seconds
- Must be a non-negative integer.
o $nanoseconds
- Must be a non-negative integer less than 1 billion.
RETURN VALUES
Returns TRUE on success or FALSE on failure.
If the delay was interrupted by a signal, an associative array will be returned with the components:
o seconds - number of seconds remaining in the delay
o nanoseconds - number of nanoseconds remaining in the delay
CHANGELOG
+--------+---------------------------------------------------+
|Version | |
| | |
| | Description |
| | |
+--------+---------------------------------------------------+
| 5.3.0 | |
| | |
| | This function is now available on Windows plat- |
| | forms. |
| | |
+--------+---------------------------------------------------+
EXAMPLES
Example #1
time_nanosleep(3) example
<?php
// Careful! This won't work as expected if an array is returned
if (time_nanosleep(0, 500000000)) {
echo "Slept for half a second.
";
}
// This is better:
if (time_nanosleep(0, 500000000) === true) {
echo "Slept for half a second.
";
}
// And this is the best:
$nano = time_nanosleep(2, 100000);
if ($nano === true) {
echo "Slept for 2 seconds, 100 microseconds.
";
} elseif ($nano === false) {
echo "Sleeping failed.
";
} elseif (is_array($nano)) {
$seconds = $nano['seconds'];
$nanoseconds = $nano['nanoseconds'];
echo "Interrupted by a signal.
";
echo "Time remaining: $seconds seconds, $nanoseconds nanoseconds.";
}
?>
SEE ALSO
sleep(3), usleep(3), time_sleep_until(3), set_time_limit(3).
PHP Documentation Group TIME_NANOSLEEP(3)