It keeps track of what argument to read next with OPTIND, which gets set globally. Try:
This should stop it from modifying the global OPTIND value.
You should be able to use ${OPTARG} instead of $2 -- indeed it's preferable to do that instead of hardcoding a parameter as position 2 -- and I'm not sure why that doesn't work.
Last edited by Corona688; 02-18-2010 at 01:24 PM..
I am writing a script that takes two parameters: the name of another script and an integer that represents a number of seconds. The script must execute the second script (first parameter) for the specified number of seconds (second parameter), suspend it for the same number of seconds, and continue... (9 Replies)
hi,
i have written an shell script which reads an folder and write the filenames to another file:
here is the script:
#!/bin/bash
find /var/www/vhosts/remixland.de/web_users/stream001/jingle15 -type f -name "*.mp3" > /etc/shoutcast001/example.lst
killall -USR1 sc_trans_linux001... (1 Reply)
How can I say one of the options is required? can I use an if statement?
let say:
while getopts ":c:u:fp" opt; do
case $opt in
c) echo "-c was triggered, Parameter: $OPTARG" >&2;;
u) echo "-u was triggered, Parameter: $OPTARG" >&2;;
f) echo "-u was triggered,... (2 Replies)
Heyas
Just recently there was a thread about parsing arguments, where i read the first time about getopts.
This said, i'd like to 'provide' a list function that can be 'trigered' using an 'option'(?).
The regarding code snippets are:
while getopts... (7 Replies)
EDIT: -- SOLVED --
Heyas,
Getting used to optargs, but by far not understanding it.
So i have that script that shall be 'changeable', trying to use the passed arguments to modify the script visuals.
Passing:
browser -t test -d sect $HOME
Where -t should change the title,
and -d... (0 Replies)
I've created a tag in the makefile:
mytag: $(shell ${PWD}/script.sh)
When i do: make clean - the script is executed
When i perform make or make mytag the script is again executed with the output:
make: Nothing to be done for mytag
What i want ?
I want script.sh to be executed only... (0 Replies)
Hi, I've got a Bash backup script I'm trying to run on a directory via a cron job nightly. If I ssh in and run the script manually it works flawlessly. If I set up the cron to run evertything is totally messed up I don't even know where to begin.
Basically the path structure is
... (6 Replies)
Hello Gurus :)
I'm "currently" (for the last ~2weeks) writing a script to build ffmpeg with some features from scratch.
This said, there are quite a few features, libs, to be downloaded, compiled and installed, so figured, writing functions for some default tasks might help.
Specialy since... (3 Replies)
I have a script that checks if the script has been ran with sudo.
If the script is not ran as sudo, the current script is being executed with exec sudo bash.
You are asked for a password, you type in the password, success. Everything is perfect - the commands inside the script are ran as sudo.... (1 Reply)
Hello,
I have this awk code in a bash script to perform a find and replace task. This finds one unique line in a file and substitutes the found line with a replacement.
#! /bin/bash
# value determined elsewhere
total_outputs_p1=100
# file being modified... (5 Replies)
Discussion started by: LMHmedchem
5 Replies
LEARN ABOUT PHP
echo
ECHO(3) 1 ECHO(3)echo - Output one or more stringsSYNOPSIS
void echo (string $arg1, [string $...])
DESCRIPTION
Outputs all parameters.
echo is not actually a function (it is a language construct), so you are not required to use parentheses with it. echo (unlike some other
language constructs) does not behave like a function, so it cannot always be used in the context of a function. Additionally, if you want
to pass more than one parameter to echo, the parameters must not be enclosed within parentheses.
echo also has a shortcut syntax, where you can immediately follow the opening tag with an equals sign. Prior to PHP 5.4.0, this short syn-
tax only works with the short_open_tag configuration setting enabled.
I have <?=$foo?> foo.
PARAMETERS
o $arg1
- The parameter to output.
o $...
-
RETURN VALUES
No value is returned.
EXAMPLES
Example #1
echo examples
<?php
echo "Hello World";
echo "This spans
multiple lines. The newlines will be
output as well";
echo "This spans
multiple lines. The newlines will be
output as well.";
echo "Escaping characters is done "Like this".";
// You can use variables inside of an echo statement
$foo = "foobar";
$bar = "barbaz";
echo "foo is $foo"; // foo is foobar
// You can also use arrays
$baz = array("value" => "foo");
echo "this is {$baz['value']} !"; // this is foo !
// Using single quotes will print the variable name, not the value
echo 'foo is $foo'; // foo is $foo
// If you are not using any other characters, you can just echo variables
echo $foo; // foobar
echo $foo,$bar; // foobarbarbaz
// Some people prefer passing multiple parameters to echo over concatenation.
echo 'This ', 'string ', 'was ', 'made ', 'with multiple parameters.', chr(10);
echo 'This ' . 'string ' . 'was ' . 'made ' . 'with concatenation.' . "
";
echo <<<END
This uses the "here document" syntax to output
multiple lines with $variable interpolation. Note
that the here document terminator must appear on a
line with just a semicolon. no extra whitespace!
END;
// Because echo does not behave like a function, the following code is invalid.
($some_var) ? echo 'true' : echo 'false';
// However, the following examples will work:
($some_var) ? print 'true' : print 'false'; // print is also a construct, but
// it behaves like a function, so
// it may be used in this context.
echo $some_var ? 'true': 'false'; // changing the statement around
?>
NOTES
Note
Because this is a language construct and not a function, it cannot be called using variable functions.
SEE ALSO print(3), printf(3), flush(3), Heredoc syntax.
PHP Documentation Group ECHO(3)