Re: help needede in backticks(``) and system function

[ikegami]

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.

[uva]

thanks ikegami.... will both the execution will interrupt the paren.i mean, will parent program wait until the child completes execution.

[ikegami]

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.