backticks

How to flush output in backticks In Perl?

If I have this perl app: print `someshellscript.sh`; that prints bunch of stuff and takes a long time to complete, how can I print that output in the middle of execution of the shell script? Looks like Perl will only print the someshellscript.sh result when it completes, is there a way to make output flush in the middle of execution...

What's the differences between system and backticks and pipes in Perl?

Perl supports three ways (that I know of) of running external programs: system: system PROGRAM LIST as in: system "abc"; backticks as in: `abc`; running it through a pipe as in: open ABC, "abc|"; What are the differences between them? Here's what I know: You can use backticks and pipes to get the output of the command ...

MySQL : When stored procedure parameter name is the same as table column name [continue]

Hello, Let's say a have a stored procedure SetCustomerName which has an input parameter Name, and I have a table customers with column Name. So inside my stored procedure I want to set customer's name. If I write UPDATE customers SET Name = Name; this is incorrect and I have to write (for example) UPDATE customers SET `Name` = Name;...

How do I get the output of curl into a variable in Perl if I invoke it using backtics?

I'm trying to get the response of a curl call into a variable in perl. my $foo = `curl yadd yadda`; print $foo; does not work. When I run this at the command line the curl call prints all its output correctly in the terminal, but the variable is not filled with that data. Is there a way to do this without installing and calling th...

character for single quote

(backtick) and ' are two different characters for single quote. I have a mysql script that shows the former two quote characters, if I change them to ', it breaks the syntax. how do I type ` from the keyboard? ...

Equivalent of Backticks in Python

What is the equivalent of the backticks found in Ruby and Perl in Python? That is, in Ruby I can do this: foo = `cat /tmp/baz` What does the equivalent statement look like in Python? I've tried os.system("cat /tmp/baz") but that puts the result to standard out and returns to me the error code of that operation. ...

bash: Using sed in backticks

I want to escape some special chars inside a string automatically. I thought of echoing that string and pipe it through some seds. This doesn't seem to work inside of backticks. So why does echo "foo[bar]" | sed 's/\[/\\[/g' return foo\[bar] but FOO=`echo "foo[bar]" | sed 's/\[/\\[/g'` && echo $FOO just returns foo[bar] ? ...

Why sshfs does not work with backtick?

When I do the following: `sshfs [email protected] /tmp/dir1/` in a irb console, the console freezes. If I use something like system("sshfs [email protected] /tmp/dir1/") it works, but I need to use backticks because the system call is in a method used many times, and some of them need the return from the shell. Any tip? ...

Escape backquote in a double-quoted string in shell

For the command: /usr/bin/sh -c "ls 1`" (a backquote after 1). How to make it run successfully? Adding a backslash before "`" does not work. ` is a special char as we know, and I tried surrounding it with single quote too (/usr/bin/sh -c "ls 1'`'"), but that doesn't work either. The error always are: % /usr/bin/sh -c "ls 1\`" Unmatc...

Why does my Perl backticks complain "sh: line 1: any: command not found"?

I've never programmed before, but needed to write a very simple webapp for work. I'm trying to get this dig query to work: dig @8.8.8.8 +nocomments +nostats +noquestion +nocmd google.com any With this bit of perl: $dig = `/usr/bin/dig \@8.8.8.8 +nocomments +nostats +noquestion +nocmd $query any`; Except it doesn't seem to recogniz...

Finding and opening a file with vim in a single command alias in tcsh

I want to make an alias which would work like this: vf hello.c would execute a find command to search for hello.c and open it in the vim editor. What is the best way to do it? I've tried the following (doesn't work): alias vf "find -name $* -exec vi {} \;" alias vf "vi `find -name $*`" Can anyone help ? ...

Display output of a Bash command and keeping the output in a variable

Hi again, I'm not sure if it is possible but what I want to do is to run a bash command and storing the output in a variable AND display it as if I launched the command normally. Here is my code: VAR=`svn checkout $URL` So I want to store the output in VAR and still see the result (and because svn checkout takes a long time, I can't ...

creating a file downloading script with checksum verification

I want to create a shellscript that reads files from a .diz file, where information about various source files are stored, that are needed to compile a certain piece of software (imagemagick in this case). i am using Mac OSX Leopard 10.5 for this examples. Basically i want to have an easy way to maintain these .diz files that hold the ...

What are the differences between backtick and single quote? Can I use IF statement in a query as above?

In the codeigniter manual writes the following. $this->db->select() accepts an optional second parameter. If you set it to FALSE, CodeIgniter will not try to protect your field or table names with backticks. This is useful if you need a compound select statement. $this->db->select('(SELECT SUM(payments.amount) FROM paym...

MySQL grouping by a previously declared alias, what do I wrap it in? ' OR `

I have an SQL query that has an alias in the SELECT statement SELECT CONCAT(YEAR(r.Date),_utf8'-',_utf8'Q',QUARTER(r.Date)) AS 'QuarterYear' Later, I want to refer to this in my group by statement. I'm a little confused...should I wrap this with backticks, single quote or just leave it unwrapped int he group by GROUP BY `Quarte...

Unix: How to use Bash backticks recursively

Either I missed some backlash or backlashing does not seem to work with too much programmer-quote-looping. $ echo "hello1-`echo hello2-\`echo hello3-\`echo hello4\`\``" hello1-hello2-hello3-echo hello4 Wanted hello1-hello2-hello3-hello4-hello5-hello6-... ...

Batch equivalent of Bash backticks

When working with Bash, I can put the output of one command into another command like so: my_command `echo Test` would be the same thing as my_command Test (Obviously, this is just a non-practical example.) I'm just wondering if you can do the same thing in Batch. ...

In Python 2.x, using backticks to get decimal string from int object is Horrible?

In Python 2.x, using backticks to get decimal string from int object is Horrible? Because backticks are repr(), not str()? I have noticed that when I answering this question. In Python source, they have same function in Python source, intobject.c (reprfunc)int_to_decimal_string, /* tp_repr */ .... (reprfunc)int_to_decimal_s...

Perl regex matching output from `w -hs` command

I'm trying to write a Perl script that will work better with KDE's kwrited, which, as far as I can tell, is connected to a pts and puts every line it receives through the KDE system tray notifications with the title "KDE write daemon". Unfortunately, it makes a separate notification for each and every line, so it spams up the system tra...

Is it possible to set an environment variable to the output of a command in cmd.exe

I need to do the equivalent of set ENVAR=`some-command` In a windows/cmd.exe script. Cygwin is not an option. For bonus marks: Is there some cmd.exe equivalent of backticks in general? ...