In Perl I can write a condition that evaluates a match expression like this:
if ($foo =~ /^bar/) {
do blah blah blah
}
How do I write this in shell? What I need to know is what operator do I use? The '=~' doesn't seem to fit. I've tried different operators, I browsed the man page for... (3 Replies)
Hi,
I have script which will take a string as input and search in a file.
But when I want to search a pattern which has special characters script is ignoring it.
For example: I want to search a pattern "\.tumblr\.com". shell script is removing \ (backslah) and trying to search... (7 Replies)
hi,
I have written a script to search MAC address in a given directory.
MAC address would be in format XX.XX.XX.XX.
The digits contain hexadecimal numbers.
For this i have used grep as follows.
grep -rn '^\{1,2\}\.\{1,2\}\.\{1,2\}\.\{1,2\}\$' *
This is not working as required.... (17 Replies)
Dear all,
I have a specific problem that I don't quite understand how to solve. I have two files, both of the same format:
XXXXXX_FIND1 bla bla bla
bla
bla
bla
bla
bla
bla
bla
bla
bla
========
(return)
XXXXXX_FIND2 bla bla bla
bla
bla
bla (10 Replies)
Hi all,
How am I read a file, find the match regular expression and overwrite to the same files.
open DESTINATION_FILE, "<tmptravl.dat" or die "tmptravl.dat";
open NEW_DESTINATION_FILE, ">new_tmptravl.dat" or die "new_tmptravl.dat";
while (<DESTINATION_FILE>)
{
# print... (1 Reply)
hi
i am trying to extract some specific data out of a text file using regular expressions with shell script
that is using a multiline grep .. and the tool i am using is pcregrep so that i can get compatibility with perl's regular expressions
for a sample data like this, i am trying to grab... (6 Replies)
I do have a shell file where I call many unix commands . I would like to add a regular expression step in that shell file, where a text file, say Test.txt has to be openned and all the :'s should be replaced.
Basically apply the follwoing regular expression:
:%s/://g
to that particular text... (2 Replies)
# check host value regex='^(||1|2|25)(\.(||1|2|25)){3}$' if ')" != "" ]; then if ]; then echo host $host not found exit 4 fi elif ]; then echo $host is an invalid host address exit 5 fi (1 Reply)
If i do below command in unix prompt which static values (ie 27..97), it is working fine and gives desired output
>ls -d $WORKDIR/batch/somefilename_{27..97}.* 2>/dev/null
somefilename_27.sometxt
somefilename_28.sometxt
somefilename_29.sometxt
..
somefilename_97.sometxt
But if i want... (2 Replies)
Discussion started by: haiderali
2 Replies
LEARN ABOUT PHP
time_nanosleep
TIME_NANOSLEEP(3) 1 TIME_NANOSLEEP(3)time_nanosleep - Delay for a number of seconds and nanosecondsSYNOPSIS
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)