How to execute multiple commands through perl script

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

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Re: How to execute multiple commands through perl script by BrowserUk (Patriarch) on Oct 04, 2016 at 20:01 UTC
Try it this way: `my $cmd = "perl Perl_Ex_1.pl"; system qq[ start /D c:\PerlExamples cmd /k $cmd ];` [download] See `start /?` at your command prompt for the explanation of /D With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday' Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". I knew I was on the right track :) In the absence of evidence, opinion is indistinguishable from prejudice.	[reply] [d/l] [select]
Re^2: How to execute multiple commands through perl script by Anonymous Monk on Oct 04, 2016 at 20:09 UTC
Thank you very much. This works too. Again I had to use \\PerlExamples so it wouldn't consider \P as an escape sequence. <\p>	[reply]
Re: How to execute multiple commands through perl script by pryrt (Abbot) on Oct 04, 2016 at 19:45 UTC
Rhetorical Question: What's different between the two examples? My Answer: You lost your quote marks around the command being sent to `cmd /k`, so the `&&` was being processed by the `system`-level `cmd.exe` rather than the embedded one. Here, I will use the `qq{}` double-quote notation to nest the quotes, so interpolation will still happen properly: `my $cmd = "perl Perl_Ex_1.pl"; system(qq{start cmd /k "cd c:\PerlExamples && $cmd"});` [download] Thus, `system` runs the whole command (everything within the `qq{}`), and `cmd /k` runs everything in the normal quote characters (so both the `cd` and the `$cmd`). update: edited first paragraph for clarity	[reply] [d/l] [select]
Re^2: How to execute multiple commands through perl script by Anonymous Monk on Oct 04, 2016 at 20:05 UTC
Thank you very much. This works. I also had to change my path name to c:\\PerlExamples as it was trying to read \P as an escape sequence.	[reply]
Re: How to execute multiple commands through perl script by Ratazong (Monsignor) on Oct 04, 2016 at 19:44 UTC
What happens when you execute `my $cmd2 = "start cmd /k cd c:\PerlExamples && $cmd"; system ($cmd2);` [download] or putting it the other way around: get executing the combined command as you wish, and then you would also be able to run it in your loop. Btw.: printing the command (in my case $cmd2) shows you how perl does substitution inside paranthesis (" or ') Hope this helps you! Rata	[reply] [d/l]
Re^2: How to execute multiple commands through perl script by Anonymous Monk on Oct 04, 2016 at 20:03 UTC
This again creates a new command prompt window and paths to my directory but executes the example script in the original window.	[reply]
Re: How to execute multiple commands through perl script by Anonymous Monk on Oct 05, 2016 at 00:14 UTC
Continuing on this topic, is it possible to run the commands on separate lines in the newly opened command prompt? So my perl script needs to open a new command prompt and in that, connect to some server (I have a script that connects to the server) and wait for connection to be done before execution of next command. This is what I am currently doing: `my $cmd1 = "python Pyscript.py server=server_name.com"; system(qq{start cmd /k "cd c:\\PerlExamples && $cmd1 && test=$test_nam +e,$file_name"});` [download] $test_name and $file_name are previously defined. Execution of this script paths to my directory and connects to my server but doesn't execute the test part. When I try to manually enter these commands in a command prompt window, it works if I have them on separate lines only. Is it possible to do this from perl?	[reply] [d/l]
Re^2: How to execute multiple commands through perl script by choroba (Cardinal) on Oct 05, 2016 at 08:48 UTC
Please, show the separate lines you used. Was it `cd c:\\PerlExamples python Pyscript.py server=server_name.com test=$test_name,$file_name` [download] The last line really seems weird. Or do you want to use the last two lines as one line only? Then drop the `&&` after `$cmd1` . ($q=q:Sq=~/;[c](.)(.)/;chr(-\|\|-\|5+lengthSq)`"S\|oS2"`map{chr \|+ord }map{substrSq`S_+\|`\|}3E\|-\|`7**2-3:)=~y+S\|`+$1,++print+eval$q,q,a, [download]	[reply] [d/l] [select]
Re^3: How to execute multiple commands through perl script by Anonymous Monk on Oct 05, 2016 at 16:27 UTC
I need to use the last line test=... on a separate line after the python Pyscript... line has executed. This is what I need to do `cd c:\\PerlExamples && python Pyscript.py server=server_name.com #The above part can be in one or two lines - it doesn't matter test=$test_name,$file_name #This has to be on separate line` [download] I suppose my question is, is there a way for me to give carriage return in this system... command?	[reply] [d/l]
Re^4: How to execute multiple commands through perl script by BrowserUk (Patriarch) on Oct 05, 2016 at 16:35 UTC