On Jul 28, 2006, at 5:09 AM, Eric Wilhelm wrote:
I just remembered that the kernel argument list limit includes
environment variables.
---
$ perl -e 'warn "going to run system"; $ENV{FOO}="bah"x1000000;
system("perl", "-e", "") and die "oops: $!\n";'
going to run system at -e line 1.
oops: Argument list too long
---
Excellent finding! We could at least show some indication of the
length of %ENV entries when we encounter this error:
=== lib/Module/Build/Base.pm
==================================================================
--- lib/Module/Build/Base.pm (revision 1938)
+++ lib/Module/Build/Base.pm (local)
@@ -3932,7 +3932,13 @@
sub do_system {
my ($self, @cmd) = @_;
$self->log_info("@cmd\n");
- return !system(@cmd);
+ my $status = system(@cmd);
+ if ($status and $! =~ /Argument list too long/i) {
+ my $env_entries = '';
+ foreach (sort keys %ENV) { $env_entries .= "$_=>".length($ENV
{$_})."; " }
+ warn "Argument list was too long, env lengths are $env_entries";
+ }
+ return !$status;
}
sub copy_if_modified {
-Ken
