Re: Check for "No child processes" internationally

I don't think that "No child process" is locale sensitive, but on some platforms could produce "No children" instead (citation). However, you can ignore the error message's text by remembering that $! is a dual-valued variable; In string context it returns the error message. In numeric context, it returns the error number, which can be tested against the &Errno::ECHILD constant (Errno).

Or you can use %! in some variant on the example code shown in Errno's POD:

# A variation on Errno's POD example:
use Errno qw( ECHILD );

# ........

if ( not close $something ) {
  if( not $!{ECHILD} ) {
    die "Houston, we have a problem: $!";
  }
  else {
    # Silence is golden; ECHILD is silent.
  }
}
[download]

Dave

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Re^2: Check for "No child processes" internationally by Anonymous Monk on May 09, 2013 at 06:58 UTC
# A variation on Errno's POD example: use Errno qw( ECHILD ); :) Unless you need the number/constant, you don't need to import from Errno Also, you don't need to actually `use Errno;`, using %! in your code will load Errno for you	[reply] [d/l]
Re^3: Check for "No child processes" internationally by davido (Cardinal) on May 09, 2013 at 07:02 UTC
Thanks for the tips. :) The updated code (removed the 'use', and of course the import): `# A variation on Errno's POD example: # ........ Do your stuff ........ if ( not close $something ) { if( not $!{ECHILD} ) { die "Houston, we have a problem: $!"; } else { # Silence is golden; ECHILD is silent. } }` [download] Dave	[reply] [d/l]