util/mkerr.pl: fix perl warning
[openssl.git] / util / mkerr.pl
index 5f094a50826e869900741bcc0f34672f0f3df073..9a3b634d57395279f53855bebb5341d1d7cdf2f3 100644 (file)
@@ -1,19 +1,29 @@
 #!/usr/local/bin/perl -w
 
 my $config = "crypto/err/openssl.ec";
+my $hprefix = "openssl/";
 my $debug = 0;
 my $rebuild = 0;
 my $static = 1;
 my $recurse = 0;
 my $reindex = 0;
 my $dowrite = 0;
+my $staticloader = "";
 
+my $pack_errcode;
+my $load_errcode;
+
+my $errcount;
+my $year = (localtime)[5] + 1900;
 
 while (@ARGV) {
        my $arg = $ARGV[0];
        if($arg eq "-conf") {
                shift @ARGV;
                $config = shift @ARGV;
+       } elsif($arg eq "-hprefix") {
+               shift @ARGV;
+               $hprefix = shift @ARGV;
        } elsif($arg eq "-debug") {
                $debug = 1;
                shift @ARGV;
@@ -29,16 +39,85 @@ while (@ARGV) {
        } elsif($arg eq "-nostatic") {
                $static = 0;
                shift @ARGV;
+       } elsif($arg eq "-staticloader") {
+               $staticloader = "static ";
+               shift @ARGV;
        } elsif($arg eq "-write") {
                $dowrite = 1;
                shift @ARGV;
+       } elsif($arg eq "-help" || $arg eq "-h" || $arg eq "-?" || $arg eq "--help") {
+               print STDERR <<"EOF";
+mkerr.pl [options] ...
+
+Options:
+
+  -conf F       Use the config file F instead of the default one:
+                  crypto/err/openssl.ec
+
+  -hprefix P    Prepend the filenames in generated #include <header>
+                statements with prefix P. Default: 'openssl/' (without
+                the quotes, naturally)
+
+  -debug        Turn on debugging verbose output on stderr.
+
+  -rebuild      Rebuild all header and C source files, irrespective of the
+                fact if any error or function codes have been added/removed.
+                Default: only update files for libraries which saw change
+                         (of course, this requires '-write' as well, or no
+                          files will be touched!)
+
+  -recurse      scan a preconfigured set of directories / files for error and
+                function codes:
+                  (<crypto/*.c>, <crypto/*/*.c>, <ssl/*.c>, <apps/*.c>)
+                When this option is NOT specified, the filelist is taken from
+                the commandline instead. Here, wildcards may be embedded. (Be
+                sure to escape those to prevent the shell from expanding them
+                for you when you wish mkerr.pl to do so instead.)
+                Default: take file list to scan from the command line.
+
+  -reindex      Discard the numeric values previously assigned to the error
+                and function codes as extracted from the scanned header files;
+                instead renumber all of them starting from 100. (Note that
+                the numbers assigned through 'R' records in the config file
+                remain intact.)
+                Default: keep previously assigned numbers. (You are warned
+                         when collisions are detected.)
+
+  -nostatic     Generates a different source code, where these additional 
+                functions are generated for each library specified in the
+                config file:
+                  void ERR_load_<LIB>_strings(void);
+                  void ERR_unload_<LIB>_strings(void);
+                  void ERR_<LIB>_error(int f, int r, char *fn, int ln);
+                  #define <LIB>err(f,r) ERR_<LIB>_error(f,r,__FILE__,__LINE__)
+                while the code facilitates the use of these in an environment
+                where the error support routines are dynamically loaded at 
+                runtime.
+                Default: 'static' code generation.
+
+  -staticloader Prefix generated functions with the 'static' scope modifier.
+                Default: don't write any scope modifier prefix.
+
+  -write        Actually (over)write the generated code to the header and C 
+                source files as assigned to each library through the config 
+                file.
+                Default: don't write.
+
+  -help / -h / -? / --help            Show this help text.
+
+  ...           Additional arguments are added to the file list to scan,
+                assuming '-recurse' was NOT specified on the command line.
+
+EOF
+               exit 1;
        } else {
                last;
        }
 }
 
 if($recurse) {
-       @source = (<crypto/*.c>, <crypto/*/*.c>, <rsaref/*.c>, <ssl/*.c>);
+       @source = ( <crypto/*.c>, <crypto/*/*.c>, <ssl/*.c>,
+                       <fips/*.c>, <fips/*/*.c>);
 } else {
        @source = @ARGV;
 }
@@ -53,11 +132,14 @@ while(<IN>)
 {
        if(/^L\s+(\S+)\s+(\S+)\s+(\S+)/) {
                $hinc{$1} = $2;
+               $libinc{$2} = $1;
                $cskip{$3} = $1;
                if($3 ne "NONE") {
                        $csrc{$1} = $3;
-                       $fmax{$1} = 99;
-                       $rmax{$1} = 99;
+                       $fmax{$1} = 100;
+                       $rmax{$1} = 100;
+                       $fassigned{$1} = ":";
+                       $rassigned{$1} = ":";
                        $fnew{$1} = 0;
                        $rnew{$1} = 0;
                }
@@ -74,94 +156,158 @@ close IN;
 # Scan each header file in turn and make a list of error codes
 # and function names
 
-while (($lib, $hdr) = each %hinc)
+while (($hdr, $lib) = each %libinc)
 {
        next if($hdr eq "NONE");
        print STDERR "Scanning header file $hdr\n" if $debug; 
-       open(IN, "<$hdr") || die "Can't open Header file $hdr\n";
-       my $line = "", $def= "";
-       while(<IN>) {
-           last if(/BEGIN\s+ERROR\s+CODES/);
-           if ($line ne '') {
-               $_ = $line . $_;
-               $line = '';
-           }
+       my $line = "", $def= "", $linenr = 0, $gotfile = 0;
+       if (open(IN, "<$hdr")) {
+           $gotfile = 1;
+           while(<IN>) {
+               $linenr++;
+               print STDERR "line: $linenr\r" if $debug;
+
+               last if(/BEGIN\s+ERROR\s+CODES/);
+               if ($line ne '') {
+                   $_ = $line . $_;
+                   $line = '';
+               }
 
-           if (/\\$/) {
-               $line = $_;
-               next;
-           }
+               if (/\\$/) {
+                   $line = $_;
+                   next;
+               }
 
-           $cpp = 1 if /^#.*ifdef.*cplusplus/;  # skip "C" declaration
-           if ($cpp) {
-               $cpp = 0 if /^#.*endif/;
-               next;
-           }
+               if(/\/\*/) {
+                   if (not /\*\//) {           # multiline comment...
+                       $line = $_;             # ... just accumulate
+                       next; 
+                   } else {
+                       s/\/\*.*?\*\///gs;      # wipe it
+                   }
+               }
+
+               if ($cpp) {
+                   $cpp++ if /^#\s*if/;
+                   $cpp-- if /^#\s*endif/;
+                   next;
+               }
+               $cpp = 1 if /^#.*ifdef.*cplusplus/;  # skip "C" declaration
 
-           next if (/^#/);                      # skip preprocessor directives
+               next if (/^\#/);                      # skip preprocessor directives
 
-           s/\/\*.*?\*\///gs;                   # ignore comments
-           s/{[^{}]*}//gs;                      # ignore {} blocks
+               s/{[^{}]*}//gs;                      # ignore {} blocks
 
-           if (/{|\/\*/) { # Add a } so editor works...
-               $line = $_;
-           } else {
-               $def .= $_;
+               if (/\{|\/\*/) { # Add a } so editor works...
+                   $line = $_;
+               } else {
+                   $def .= $_;
+               }
            }
        }
 
+       print STDERR "                                  \r" if $debug;
+        $defnr = 0;
+       # Delete any DECLARE_ macros
+       $def =~ s/DECLARE_\w+\([\w,\s]+\)//gs;
        foreach (split /;/, $def) {
+           $defnr++;
+           print STDERR "def: $defnr\r" if $debug;
+
+           # The goal is to collect function names from function declarations.
+
            s/^[\n\s]*//g;
            s/[\n\s]*$//g;
-           next if(/typedef\W/);
-           if (/\(\*(\w*)\([^\)]+/) {
-               my $name = $1;
-               $name =~ tr/[a-z]/[A-Z]/;
-               $ftrans{$name} = $1;
-           } elsif (/\w+\W+(\w+)\W*\(\s*\)$/s){
-               # K&R C
-               next ;
-           } elsif (/\w+\W+\w+\W*\(.*\)$/s) {
-               while (not /\(\)$/s) {
-                   s/[^\(\)]*\)$/\)/s;
-                   s/\([^\(\)]*\)\)$/\)/s;
-               }
-               s/\(void\)//;
-               /(\w+)\W*\(\)/s;
-               my $name = $1;
+
+           # Skip over recognized non-function declarations
+           next if(/typedef\W/ or /DECLARE_STACK_OF/ or /TYPEDEF_.*_OF/);
+
+           # Remove STACK_OF(foo)
+           s/STACK_OF\(\w+\)/void/;
+
+           # Reduce argument lists to empty ()
+           # fold round brackets recursively: (t(*v)(t),t) -> (t{}{},t) -> {}
+           while(/\(.*\)/s) {
+               s/\([^\(\)]+\)/\{\}/gs;
+               s/\(\s*\*\s*(\w+)\s*\{\}\s*\)/$1/gs;    #(*f{}) -> f
+           }
+           # pretend as we didn't use curly braces: {} -> ()
+           s/\{\}/\(\)/gs;
+
+           if (/(\w+)\s*\(\).*/s) {    # first token prior [first] () is
+               my $name = $1;          # a function name!
                $name =~ tr/[a-z]/[A-Z]/;
                $ftrans{$name} = $1;
-           } elsif (/\(/ and not (/=/ or /DECLARE_STACK/)) {
+           } elsif (/[\(\)]/ and not (/=/)) {
                print STDERR "Header $hdr: cannot parse: $_;\n";
            }
        }
 
+       print STDERR "                                  \r" if $debug;
+
        next if $reindex;
 
        # Scan function and reason codes and store them: keep a note of the
        # maximum code used.
 
-       while(<IN>) {
-               if(/^#define\s+(\S+)\s+(\S+)/) {
+       if ($gotfile) {
+         while(<IN>) {
+               if(/^\#define\s+(\S+)\s+(\S+)/) {
                        $name = $1;
                        $code = $2;
+                       next if $name =~ /^${lib}err/;
                        unless($name =~ /^${lib}_([RF])_(\w+)$/) {
                                print STDERR "Invalid error code $name\n";
                                next;
                        }
                        if($1 eq "R") {
                                $rcodes{$name} = $code;
+                               if ($rassigned{$lib} =~ /:$code:/) {
+                                       print STDERR "!! ERROR: $lib reason code $code assigned twice (collision at $name)\n";
+                                       ++$errcount;
+                               }
+                               $rassigned{$lib} .= "$code:";
                                if(!(exists $rextra{$name}) &&
                                         ($code > $rmax{$lib}) ) {
                                        $rmax{$lib} = $code;
                                }
                        } else {
+                               if ($fassigned{$lib} =~ /:$code:/) {
+                                       print STDERR "!! ERROR: $lib function code $code assigned twice (collision at $name)\n";
+                                       ++$errcount;
+                               }
+                               $fassigned{$lib} .= "$code:";
                                if($code > $fmax{$lib}) {
                                        $fmax{$lib} = $code;
                                }
                                $fcodes{$name} = $code;
                        }
                }
+         }
+       }
+
+       if ($debug) {
+               if (defined($fmax{$lib})) {
+                       print STDERR "Max function code fmax" . "{" . "$lib" . "} = $fmax{$lib}\n";
+                       $fassigned{$lib} =~ m/^:(.*):$/;
+                       @fassigned = sort {$a <=> $b} split(":", $1);
+                       print STDERR "  @fassigned\n";
+               }
+               if (defined($rmax{$lib})) {
+                       print STDERR "Max reason code rmax" . "{" . "$lib" . "} = $rmax{$lib}\n";
+                       $rassigned{$lib} =~ m/^:(.*):$/;
+                       @rassigned = sort {$a <=> $b} split(":", $1);
+                       print STDERR "  @rassigned\n";
+               }
+       }
+
+       if ($lib eq "SSL") {
+               if ($rmax{$lib} >= 1000) {
+                       print STDERR "!! ERROR: SSL error codes 1000+ are reserved for alerts.\n";
+                       print STDERR "!!        Any new alerts must be added to $config.\n";
+                       ++$errcount;
+                       print STDERR "\n";
+               }
        }
        close IN;
 }
@@ -181,8 +327,12 @@ while (($lib, $hdr) = each %hinc)
 foreach $file (@source) {
        # Don't parse the error source file.
        next if exists $cskip{$file};
+       print STDERR "File loaded: ".$file."\r" if $debug;
        open(IN, "<$file") || die "Can't open source file $file\n";
        while(<IN>) {
+               # skip obsoleted source files entirely!
+               last if(/^#error\s+obsolete/);
+
                if(/(([A-Z0-9]+)_F_([A-Z0-9_]+))/) {
                        next unless exists $csrc{$2};
                        next if($1 eq "BIO_F_BUFFER_CTX");
@@ -192,6 +342,7 @@ foreach $file (@source) {
                                $fnew{$2}++;
                        }
                        $notrans{$1} = 1 unless exists $ftrans{$3};
+                       print STDERR "Function: $1\t= $fcodes{$1} (lib: $2, name: $3)\n" if $debug; 
                }
                if(/(([A-Z0-9]+)_R_[A-Z0-9_]+)/) {
                        next unless exists $csrc{$2};
@@ -200,10 +351,12 @@ foreach $file (@source) {
                                $rcodes{$1} = "X";
                                $rnew{$2}++;
                        }
+                       print STDERR "Reason: $1\t= $rcodes{$1} (lib: $2)\n" if $debug; 
                } 
        }
        close IN;
 }
+print STDERR "                                  \n" if $debug;
 
 # Now process each library in turn.
 
@@ -230,15 +383,78 @@ foreach $lib (keys %csrc)
 
        # Rewrite the header file
 
-       open(IN, "<$hfile") || die "Can't Open Header File $hfile\n";
-
-       # Copy across the old file
-       while(<IN>) {
+       if (open(IN, "<$hfile")) {
+           # Copy across the old file
+           while(<IN>) {
                push @out, $_;
                last if (/BEGIN ERROR CODES/);
+           }
+           close IN;
+       } else {
+           push @out,
+"/* ====================================================================\n",
+" * Copyright (c) 2001-$year The OpenSSL Project.  All rights reserved.\n",
+" *\n",
+" * Redistribution and use in source and binary forms, with or without\n",
+" * modification, are permitted provided that the following conditions\n",
+" * are met:\n",
+" *\n",
+" * 1. Redistributions of source code must retain the above copyright\n",
+" *    notice, this list of conditions and the following disclaimer. \n",
+" *\n",
+" * 2. Redistributions in binary form must reproduce the above copyright\n",
+" *    notice, this list of conditions and the following disclaimer in\n",
+" *    the documentation and/or other materials provided with the\n",
+" *    distribution.\n",
+" *\n",
+" * 3. All advertising materials mentioning features or use of this\n",
+" *    software must display the following acknowledgment:\n",
+" *    \"This product includes software developed by the OpenSSL Project\n",
+" *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)\"\n",
+" *\n",
+" * 4. The names \"OpenSSL Toolkit\" and \"OpenSSL Project\" must not be used to\n",
+" *    endorse or promote products derived from this software without\n",
+" *    prior written permission. For written permission, please contact\n",
+" *    openssl-core\@openssl.org.\n",
+" *\n",
+" * 5. Products derived from this software may not be called \"OpenSSL\"\n",
+" *    nor may \"OpenSSL\" appear in their names without prior written\n",
+" *    permission of the OpenSSL Project.\n",
+" *\n",
+" * 6. Redistributions of any form whatsoever must retain the following\n",
+" *    acknowledgment:\n",
+" *    \"This product includes software developed by the OpenSSL Project\n",
+" *    for use in the OpenSSL Toolkit (http://www.openssl.org/)\"\n",
+" *\n",
+" * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY\n",
+" * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\n",
+" * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR\n",
+" * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR\n",
+" * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n",
+" * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT\n",
+" * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\n",
+" * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\n",
+" * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,\n",
+" * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)\n",
+" * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED\n",
+" * OF THE POSSIBILITY OF SUCH DAMAGE.\n",
+" * ====================================================================\n",
+" *\n",
+" * This product includes cryptographic software written by Eric Young\n",
+" * (eay\@cryptsoft.com).  This product includes software written by Tim\n",
+" * Hudson (tjh\@cryptsoft.com).\n",
+" *\n",
+" */\n",
+"\n",
+"#ifndef HEADER_${lib}_ERR_H\n",
+"#define HEADER_${lib}_ERR_H\n",
+"\n",
+"#ifdef  __cplusplus\n",
+"extern \"C\" {\n",
+"#endif\n",
+"\n",
+"/* BEGIN ERROR CODES */\n";
        }
-       close IN;
-
        open (OUT, ">$hfile") || die "Can't Open File $hfile for writing\n";
 
        print OUT @out;
@@ -247,7 +463,22 @@ foreach $lib (keys %csrc)
 /* The following lines are auto generated by the script mkerr.pl. Any changes
  * made after this point may be overwritten when the script is next run.
  */
+EOF
+       if($static) {
+               print OUT <<"EOF";
+${staticloader}void ERR_load_${lib}_strings(void);
 
+EOF
+       } else {
+               print OUT <<"EOF";
+${staticloader}void ERR_load_${lib}_strings(void);
+${staticloader}void ERR_unload_${lib}_strings(void);
+${staticloader}void ERR_${lib}_error(int function, int reason, char *file, int line);
+#define ${lib}err(f,r) ERR_${lib}_error((f),(r),__FILE__,__LINE__)
+
+EOF
+       }
+       print OUT <<"EOF";
 /* Error codes for the $lib functions. */
 
 /* Function codes. */
@@ -256,7 +487,16 @@ EOF
        foreach $i (@function) {
                $z=6-int(length($i)/8);
                if($fcodes{$i} eq "X") {
-                       $fcodes{$i} = ++$fmax{$lib};
+                       $fassigned{$lib} =~ m/^:([^:]*):/;
+                       $findcode = $1;
+                       if (!defined($findcode)) {
+                               $findcode = $fmax{$lib};
+                       }
+                       while ($fassigned{$lib} =~ m/:$findcode:/) {
+                               $findcode++;
+                       }
+                       $fcodes{$i} = $findcode;
+                       $fassigned{$lib} .= "$findcode:";
                        print STDERR "New Function code $i\n" if $debug;
                }
                printf OUT "#define $i%s $fcodes{$i}\n","\t" x $z;
@@ -267,7 +507,16 @@ EOF
        foreach $i (@reasons) {
                $z=6-int(length($i)/8);
                if($rcodes{$i} eq "X") {
-                       $rcodes{$i} = ++$rmax{$lib};
+                       $rassigned{$lib} =~ m/^:([^:]*):/;
+                       $findcode = $1;
+                       if (!defined($findcode)) {
+                               $findcode = $rmax{$lib};
+                       }
+                       while ($rassigned{$lib} =~ m/:$findcode:/) {
+                               $findcode++;
+                       }
+                       $rcodes{$i} = $findcode;
+                       $rassigned{$lib} .= "$findcode:";
                        print STDERR "New Reason code   $i\n" if $debug;
                }
                printf OUT "#define $i%s $rcodes{$i}\n","\t" x $z;
@@ -278,7 +527,6 @@ EOF
 }
 #endif
 #endif
-
 EOF
        close OUT;
 
@@ -291,25 +539,46 @@ EOF
                        if (/\b(${lib}_R_\w*)\b.*\"(.*)\"/) {
                                $err_reason_strings{$1} = $2;
                        }
+                       if (/\b${lib}_F_(\w*)\b.*\"(.*)\"/) {
+                               if (!exists $ftrans{$1} && ($1 ne $2)) {
+                                       print STDERR "WARNING: Mismatched function string $2\n";
+                                       $ftrans{$1} = $2;
+                               }
+                       }
                }
                close(IN);
        }
 
+
        my $hincf;
        if($static) {
                $hfile =~ /([^\/]+)$/;
-               $hincf = "<openssl/$1>";
+               $hincf = "<${hprefix}$1>";
        } else {
                $hincf = "\"$hfile\"";
        }
 
+       # If static we know the error code at compile time so use it
+       # in error definitions.
+
+       if ($static)
+               {
+               $pack_errcode = "ERR_LIB_${lib}";
+               $load_errcode = "0";
+               }
+       else
+               {
+               $pack_errcode = "0";
+               $load_errcode = "ERR_LIB_${lib}";
+               }
+
 
        open (OUT,">$cfile") || die "Can't open $cfile for writing";
 
        print OUT <<"EOF";
 /* $cfile */
 /* ====================================================================
- * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
+ * Copyright (c) 1999-$year The OpenSSL Project.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -372,7 +641,11 @@ EOF
 #include $hincf
 
 /* BEGIN ERROR CODES */
-#ifndef NO_ERR
+#ifndef OPENSSL_NO_ERR
+
+#define ERR_FUNC(func) ERR_PACK($pack_errcode,func,0)
+#define ERR_REASON(reason) ERR_PACK($pack_errcode,0,reason)
+
 static ERR_STRING_DATA ${lib}_str_functs[]=
        {
 EOF
@@ -384,7 +657,8 @@ EOF
                if(exists $ftrans{$fn}) {
                        $fn = $ftrans{$fn};
                }
-               print OUT "{ERR_PACK(0,$i,0),\t\"$fn\"},\n";
+#              print OUT "{ERR_PACK($pack_errcode,$i,0),\t\"$fn\"},\n";
+               print OUT "{ERR_FUNC($i),\t\"$fn\"},\n";
        }
        print OUT <<"EOF";
 {0,NULL}
@@ -396,6 +670,7 @@ EOF
        # Add each reason code.
        foreach $i (@reasons) {
                my $rn;
+               my $rstr = "ERR_REASON($i)";
                my $nspc = 0;
                if (exists $err_reason_strings{$i}) {
                        $rn = $err_reason_strings{$i};
@@ -404,9 +679,9 @@ EOF
                        $rn = $1;
                        $rn =~ tr/_[A-Z]/ [a-z]/;
                }
-               $nspc = 40 - length($i) unless length($i) > 40;
+               $nspc = 40 - length($rstr) unless length($rstr) > 40;
                $nspc = " " x $nspc;
-               print OUT "{${i}${nspc},\"$rn\"},\n";
+               print OUT "{${rstr}${nspc},\"$rn\"},\n";
        }
 if($static) {
        print OUT <<"EOF";
@@ -415,19 +690,16 @@ if($static) {
 
 #endif
 
-void ERR_load_${lib}_strings(void)
+${staticloader}void ERR_load_${lib}_strings(void)
        {
-       static int init=1;
+#ifndef OPENSSL_NO_ERR
 
-       if (init)
+       if (ERR_func_error_string(${lib}_str_functs[0].error) == NULL)
                {
-               init=0;
-#ifndef NO_ERR
-               ERR_load_strings(ERR_LIB_${lib},${lib}_str_functs);
-               ERR_load_strings(ERR_LIB_${lib},${lib}_str_reasons);
-#endif
-
+               ERR_load_strings($load_errcode,${lib}_str_functs);
+               ERR_load_strings($load_errcode,${lib}_str_reasons);
                }
+#endif
        }
 EOF
 } else {
@@ -446,19 +718,18 @@ static ERR_STRING_DATA ${lib}_lib_name[]=
 #endif
 
 
-int ${lib}_lib_error_code=0;
+static int ${lib}_lib_error_code=0;
+static int ${lib}_error_init=1;
 
-void ERR_load_${lib}_strings(void)
+${staticloader}void ERR_load_${lib}_strings(void)
        {
-       static int init=1;
-
        if (${lib}_lib_error_code == 0)
                ${lib}_lib_error_code=ERR_get_next_error_library();
 
-       if (init)
+       if (${lib}_error_init)
                {
-               init=0;
-#ifndef NO_ERR
+               ${lib}_error_init=0;
+#ifndef OPENSSL_NO_ERR
                ERR_load_strings(${lib}_lib_error_code,${lib}_str_functs);
                ERR_load_strings(${lib}_lib_error_code,${lib}_str_reasons);
 #endif
@@ -470,7 +741,23 @@ void ERR_load_${lib}_strings(void)
                }
        }
 
-void ERR_${lib}_error(int function, int reason, char *file, int line)
+${staticloader}void ERR_unload_${lib}_strings(void)
+       {
+       if (${lib}_error_init == 0)
+               {
+#ifndef OPENSSL_NO_ERR
+               ERR_unload_strings(${lib}_lib_error_code,${lib}_str_functs);
+               ERR_unload_strings(${lib}_lib_error_code,${lib}_str_reasons);
+#endif
+
+#ifdef ${lib}_LIB_NAME
+               ERR_unload_strings(0,${lib}_lib_name);
+#endif
+               ${lib}_error_init=1;
+               }
+       }
+
+${staticloader}void ERR_${lib}_error(int function, int reason, char *file, int line)
        {
        if (${lib}_lib_error_code == 0)
                ${lib}_lib_error_code=ERR_get_next_error_library();
@@ -484,7 +771,7 @@ EOF
        undef %err_reason_strings;
 }
 
-if($debug && defined(%notrans)) {
+if($debug && %notrans) {
        print STDERR "The following function codes were not translated:\n";
        foreach(sort keys %notrans)
        {
@@ -502,7 +789,7 @@ foreach (keys %rcodes) {
        push (@runref, $_) unless exists $urcodes{$_};
 }
 
-if($debug && defined(@funref) ) {
+if($debug && @funref) {
        print STDERR "The following function codes were not referenced:\n";
        foreach(sort @funref)
        {
@@ -510,10 +797,16 @@ if($debug && defined(@funref) ) {
        }
 }
 
-if($debug && defined(@runref) ) {
+if($debug && @runref) {
        print STDERR "The following reason codes were not referenced:\n";
        foreach(sort @runref)
        {
                print STDERR "$_\n";
        }
 }
+
+if($errcount) {
+       print STDERR "There were errors, failing...\n\n";
+       exit $errcount;
+}
+