help needede in backticks(``) and system function

Comment on help needede in backticks(``) and system function
Re: help needede in backticks(``) and system function by ikegami (Pope) on Feb 10, 2006 at 06:34 UTC
The difference is whether the output (STDOUT) is captured or now. Backticks return what was printed to STDOUT, while `system` does not. From the docs, it sounds like backticks always pass the command to a subshell, while it's possible to avoid running a subshell with `system`.	[reply] [d/l] [select]
Re^2: help needede in backticks(``) and system function by uva (Sexton) on Feb 10, 2006 at 06:38 UTC
thanks ikegami.... will both the execution will interrupt the paren.i mean, will parent program wait until the child completes execution.	[reply]
Re^3: help needede in backticks(``) and system function by ikegami (Pope) on Feb 10, 2006 at 06:41 UTC
Yes, the parent will wait in both cases. Unless you do execute something like `command &` (unix) or `start command` (Windows). `fork`+`exec` doesn't wait. IPC::Open3 doesn't wait. IPC::Run can do both. The special syntax `system 1, ...` in Windows doesn't wait.	[reply] [d/l] [select]
Re: help needede in backticks(``) and system function by planetscape (Canon) on Feb 10, 2006 at 07:39 UTC
Reading the following may help your understanding of this topic: How do I get both the return value and text? backticks vs. system() How do I store and manipulate the output from another process? How to run a shell script from a Perl program? HTH, planetscape	[reply]