Re^3: Restarting a Perl script on Windows 10

The solution

exec(qw/wmic process call create/ => "CommandLine='wperl $pathToMyself'");

works fine, as long as the script to call (pointed to by $pathToMyself) doesn't require additional command line parameters.

I know, that this is not a Perl issue, but would you have a solution on how to add command line parameters to this call? I must admit that I don't understand the wmic docs...

Comment on Re^3: Restarting a Perl script on Windows 10 Select or Download Code

Replies are listed 'Best First'.
Re^4: Restarting a Perl script on Windows 10 by jcb (Parson) on May 07, 2020 at 23:33 UTC
WinDOS uses the DOS model and does not pass arguments to invoked processes, only a "command tail" string that all Windows C runtime libraries parse into `argc` and `argv` using some rules or other. Using `wperl` as in your example means that `$pathToMyself` is already being passed as the "command tail" to `wperl`. Try: `my $argtail = join ' ', @args; exec(qw/wmic process call create/ => "CommandLine='wperl $pathToMyself + $argtail'");` [download] If you are wondering, yes, this does mean that arguments containing whitespace are a problem. Quoting is handled by C runtime library startup code and that can vary from program to program because there is no standard system C runtime library on Windows.	[reply] [d/l] [select]

Replies are listed 'Best First'.

Re^4: Restarting a Perl script on Windows 10
by jcb (Parson) on May 07, 2020 at 23:33 UTC

WinDOS uses the DOS model and does not pass arguments to invoked processes, only a "command tail" string that all Windows C runtime libraries parse into argc and argv using some rules or other.

Using wperl as in your example means that $pathToMyself is already being passed as the "command tail" to wperl. Try:

my $argtail = join ' ', @args;
exec(qw/wmic process call create/ => "CommandLine='wperl $pathToMyself
+ $argtail'");
[download]

If you are wondering, yes, this does mean that arguments containing whitespace are a problem. Quoting is handled by C runtime library startup code and that can vary from program to program because there is no standard system C runtime library on Windows.

[reply]
[d/l]
[select]