system() and output redirect

[llancet]

Perl's system() function has two modes: if you give one argument, it will have this string parsed by a "shell"; if you give an array, it will use the first one as program name, and directly pass the following things to the program without the process by a "shell"

We know that the second mode is more safe, as it avoids the arguments with spaces being splitted into multiple arguments. So we should prefer the second mode. However, I don't know how to use ">file" in the second mode. If you provide it, it will be transferred into the program, not performing an output redirection. For example:

# This works
system("cat foo >bar");

# ">bar" being passed to cat as an argument
# and there's no file named ">bar"
system('cat', 'foo', '>bar');

Thanks!

[Anonymous Monk]

However, I don't know how to use ">file" in the second mode

Hi llancet

shell functionality is handled by the shell :) unless your program handles it

so to safely use the shell you might try String::ShellQuote , Win32::ShellQuote, Proc::Background, system_detached

or to handle it from your program you might try Capture::Tiny, IPC::Run3,

[vinoth.ree]

Redirect output of the system() command

Re^2: Redirect output of the system() command