Bug #59489 Enable setting of env. variables for mysqld from mtr

Added --mysqld-env option, propagate via safe_process
Simplified: should be safe to set in parent safe_process after it's started
Addendum: catch cases of --mysqld-env w/o value, assume env.var 
    name never begins with "--"

mysql-test/lib/My/SafeProcess.pm

 # -*- cperl -*-
-# Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU Library General Public
@@ -139,6 +139,7 @@ sub new {
   my $host     = delete($opts{'host'});
   my $shutdown = delete($opts{'shutdown'});
   my $user_data= delete($opts{'user_data'});
+  my $envs     = delete($opts{'envs'});
 
 #  if (defined $host) {
 #    $safe_script=  "lib/My/SafeProcess/safe_process_cpcd.pl";
@@ -161,6 +162,13 @@ sub new {
   # Point the safe_process at the right parent if running on cygwin
   push(@safe_args, "--parent-pid=".Cygwin::pid_to_winpid($$)) if IS_CYGWIN;
 
+  foreach my $env_var (@$envs) {
+    croak("Missing = in env string") unless $env_var =~ /=/;
+    croak("Env string $env_var seen, probably missing value for --mysqld-env")
+      if $env_var =~ /^--/;
+    push @safe_args, "--env $env_var";
+  }
+
   push(@safe_args, "--");
   push(@safe_args, $path); # The program safe_process should execute
 

mysql-test/lib/My/SafeProcess/safe_process.cc

-/* Copyright (C) 2008 MySQL AB, 2009 Sun Microsystems, Inc.
+/* Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -175,7 +175,7 @@ int main(int argc, char* const argv[] )
     } else {
       if ( strcmp(arg, "--verbose") == 0 )
         verbose++;
-      else if ( strncmp(arg, "--parent-pid", 10) == 0 )
+      else if ( strncmp(arg, "--parent-pid", 12) == 0 )
       {
         /* Override parent_pid with a value provided by user */
         const char* start;
@@ -184,10 +184,15 @@ int main(int argc, char* const argv[] )
         start++; /* Step past = */
         if ((parent_pid= atoi(start)) == 0)
           die("Invalid value '%s' passed to --parent-id", start);
-      } else if ( strcmp(arg, "--nocore") == 0 )
+      }
+      else if ( strcmp(arg, "--nocore") == 0 )
       {
         nocore = true;	// Don't allow the process to dump core
       }
+      else if ( strncmp (arg, "--env ", 6) == 0 )
+      {
+	putenv(strdup(arg+6));
+      }
       else
         die("Unknown option: %s", arg);
     }

mysql-test/lib/My/SafeProcess/safe_process_win.cc

-/* Copyright (C) 2008 MySQL AB, 2009 Sun Microsystems, Inc.
+/* Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -220,6 +220,10 @@ int main(int argc, const char** argv )
       {
         nocore= TRUE;
       }
+      else if ( strncmp (arg, "--env ", 6) == 0 )
+      {
+	putenv(strdup(arg+6));
+      }
       else
         die("Unknown option: %s", arg);
     }

mysql-test/mysql-test-run.pl

@@ -176,6 +176,7 @@ our $opt_big_test= 0;
 our @opt_combinations;
 
 our @opt_extra_mysqld_opt;
+our @opt_mysqld_envs;
 
 my $opt_compress;
 my $opt_ssl;
@@ -962,6 +963,7 @@ sub command_line_setup {
 
              # Extra options used when starting mysqld
              'mysqld=s'                 => \@opt_extra_mysqld_opt,
+             'mysqld-env=s'             => \@opt_mysqld_envs,
 
              # Run test on running server
              'extern=s'                  => \%opts_extern, # Append to hash
@@ -4710,6 +4712,7 @@ sub mysqld_start ($$) {
        nocore        => $opt_skip_core,
        host          => undef,
        shutdown      => sub { mysqld_stop($mysqld) },
+       envs          => \@opt_mysqld_envs,
       );
     mtr_verbose("Started $mysqld->{proc}");
   }
@@ -5724,9 +5727,10 @@ Options for test case authoring
   check-testcases       Check testcases for sideeffects
   mark-progress         Log line number and elapsed time to <testname>.progress
 
-Options that pass on options
+Options that pass on options (these may be repeated)
 
   mysqld=ARGS           Specify additional arguments to "mysqld"
+  mysqld-env=VAR=VAL    Specify additional environment settings for "mysqld"
 
 Options to run test on running server