How to avoid to launch a unix shell script in a perl script

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

Replies are listed 'Best First'.
Re: How to avoid to launch a unix shell script in a perl script by ikegami (Patriarch) on May 06, 2008 at 09:13 UTC
I'm confused. Are you having a problem running `enter.sh` or `cmd_proc_shell`? It sounds like you are having problems with latter, but then there'd be no reason to mention the former. Assuming your problem is with `cmd_proc_shell`, how do you want to run it? Specifically, do you need to capture its output, do you need to know its error code, do you want to wait for it to finish running before continuing, and are you on a Windows system or not? If you don't need to capture its output and you don't mind waiting for it to finish running before continuing, `Unix: system('cmd_proc_shell', 'enter 0,1,0'); Windows system('cmd_proc_shell "enter 0,1,0"');` [download] In unix, the quotes you passed to the shell aren't seen by the program. The shell splits the command into arguments, unquotes everything, and passes the arguments as an array. In Windows, it's the program's responsibility to handle its own command line parsing.	[reply] [d/l] [select]
Re^2: How to avoid to launch a unix shell script in a perl script by bertigo (Novice) on May 06, 2008 at 10:03 UTC
The script run on unix; the cmd_proc_shell has to be launched on background otherwise the command wait a CTRL-C. I don't need to capture the output nor the error code.	[reply]
Re^3: How to avoid to launch a unix shell script in a perl script by moritz (Cardinal) on May 06, 2008 at 10:11 UTC
`fork \|\| exec("cmd_proc_shell");`	[reply] [d/l]
Re^4: How to avoid to launch a unix shell script in a perl script by ikegami (Patriarch) on May 06, 2008 at 12:07 UTC
Re^4: How to avoid to launch a unix shell script in a perl script by bertigo (Novice) on May 06, 2008 at 15:12 UTC
Re: How to avoid to launch a unix shell script in a perl script by moritz (Cardinal) on May 06, 2008 at 08:55 UTC
Why do you want to avoid it? And what do you want to do instead? Emulate the contents of enter.sh in your perl script? Or use another way to start enter.sh in the background? (you can achieve that with fork and exec)	[reply]
Re: How to avoid to launch a unix shell script in a perl script by ambrus (Abbot) on May 07, 2008 at 12:08 UTC
Search for "background" in perlfaq8 and in perlipc on how to launch a subprocess in the background. If you read carefully, these perldocs also tell you how to make the subprocess lose its controlling terminal and redirect its output to a file, which is what nohup does.	[reply]