Add support for DJGPP. PR: 75

diff --git a/Configure b/Configure
index 8fe14d8..35520b5 100755
--- a/Configure
+++ b/Configure

@@ -513,6 +513,9 @@
 "Cygwin-pre1.3", "gcc:-DTERMIOS -DL_ENDIAN -fomit-frame-pointer -O3 -m486 -Wall::(unknown):CYGWIN32::BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}::::::::::win32",
 "Cygwin", "gcc:-DTERMIOS -DL_ENDIAN -fomit-frame-pointer -O3 -m486 -Wall:::CYGWIN32::BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}:${x86_out_asm}:win32:cygwin-shared:::.dll",
 
+# DJGPP
+"DJGPP", "gcc:-I/dev/env/DJDIR/watt32/inc -DTERMIOS -DL_ENDIAN -fomit-frame-pointer -O2 -Wall:::MSDOS:-L$ENV{DJDIR}/watt32/lib -lwatt:BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}::::::::::",
+
 # Ultrix from Bernhard Simon <simon@zid.tuwien.ac.at>
 "ultrix-cc","cc:-std1 -O -Olimit 1000 -DL_ENDIAN::(unknown):::::::",
 "ultrix-gcc","gcc:-O3 -DL_ENDIAN::(unknown):::::::",
@@ -637,6 +640,7 @@
 my $target;
 my $options;
 my $symlink;
+my $make_depend=0;
 my %withargs=();
 
 my @argvcopy=@ARGV;
@@ -902,6 +906,7 @@
 my $IsWindows=scalar grep /^$target$/,@WinTargets;
 
 $exe_ext=".exe" if ($target eq "Cygwin");
+$exe_ext=".exe" if ($target eq "DJGPP");
 $openssldir="/usr/local/ssl" if ($openssldir eq "" and $prefix eq "");
 $prefix=$openssldir if $prefix eq "";
 
@@ -909,7 +914,7 @@
 chop $prefix if $prefix =~ /\/$/;
 
 $openssldir=$prefix . "/ssl" if $openssldir eq "";
-$openssldir=$prefix . "/" . $openssldir if $openssldir !~ /^\//;
+$openssldir=$prefix . "/" . $openssldir if $openssldir !~ /(^\/|^[a-zA-Z]:[\\\/])/;
 
 
 print "IsWindows=$IsWindows\n";
@@ -1436,11 +1441,12 @@
 EOF
 	close(OUT);
 } else {
-	(system "make -f Makefile.ssl PERL=\'$perl\' links") == 0 or exit $?
-		if $symlink;
-	### (system 'make depend') == 0 or exit $? if $depflags ne "";
-	# Run "make depend" manually if you want to be able to delete
-	# the source code files of ciphers you left out.
+	my $make_command = "make -f Makefile.ssl PERL=\'$perl\'";
+	my $make_targets = "";
+	$make_targets .= " links" if $symlink;
+	$make_targets .= " depend" if $depflags ne "" && $make_depend;
+	(system $make_command.$make_targets) == 0 or exit $?
+		if $make_targets ne "";
 	if ( $perl =~ m@^/@) {
 	    &dofile("tools/c_rehash",$perl,'^#!/', '#!%s','^my \$dir;$', 'my $dir = "' . $openssldir . '";');
 	    &dofile("apps/der_chop",$perl,'^#!/', '#!%s');
@@ -1450,7 +1456,16 @@
 	    &dofile("tools/c_rehash",'/usr/local/bin/perl','^#!/', '#!%s','^my \$dir;$', 'my $dir = "' . $openssldir . '";');
 	    &dofile("apps/der_chop",'/usr/local/bin/perl','^#!/', '#!%s');
 	    &dofile("apps/CA.pl",'/usr/local/bin/perl','^#!/', '#!%s');
-	}	    
+	}
+	if ($depflags ne "" && !$make_depend) {
+		print <<EOF;
+
+Since you've disabled at least one algorithm, you need to do the following
+before building:
+
+	make depend
+EOF
+	}
 }
 
 print <<EOF;

diff --git a/INSTALL.DJGPP b/INSTALL.DJGPP
new file mode 100644
index 0000000..0120b94
--- /dev/null
+++ b/INSTALL.DJGPP

@@ -0,0 +1,32 @@
+
+ 
+ INSTALLATION ON THE DOS PLATFORM WITH DJGPP
+ -------------------------------------------
+
+ Openssl has been ported to DOS, but only with long filename support. If
+ you wish to compile on native DOS with 8+3 filenames, you will have to
+ tweak the installation yourself, including renaming files with illegal
+ or duplicate names.
+
+ You should have a full DJGPP environment installed, including the
+ latest versions of DJGPP, GCC, BINUTILS, BASH, etc. This package
+ requires that PERL and BC also be installed.
+
+ All of these can be obtained from the usual DJGPP mirror sites, such as
+ "ftp://ftp.simtel.net/pub/simtelnet/gnu/djgpp". You also need to have
+ the WATT-32 networking package installed before you try to compile
+ openssl. This can be obtained from "http://www.bgnett.no/~giva/". The
+ Makefile assumes that the WATT-32 code is in directory "watt32" under
+ /dev/env/DJDIR.
+
+ To compile openssl, start your BASH shell. Then configure for DOS by
+ running "./Configure" with appropriate arguments. The basic syntax for
+ DOS is:
+ ./Configure no-threads --prefix=/dev/env/DJDIR DJGPP
+ 
+ You may run out of DPMI selectors when running in a DOS box under
+ Windows. If so, just close the BASH shell, go back to Windows, and
+ restart BASH. Then run "make" again.
+
+ Building openssl under DJGPP has been tested with DJGPP 2.03,
+ GCC 2.952, GCC 2.953, perl 5.005_02 and perl 5.006_01.

diff --git a/crypto/asn1/Makefile.ssl b/crypto/asn1/Makefile.ssl
index 267d4a1..6da75a2 100644
--- a/crypto/asn1/Makefile.ssl
+++ b/crypto/asn1/Makefile.ssl

@@ -353,10 +353,11 @@
 asn1_err.o: ../../include/openssl/safestack.h ../../include/openssl/stack.h
 asn1_err.o: ../../include/openssl/symhacks.h asn1_err.c
 asn1_lib.o: ../../e_os.h ../../include/openssl/asn1.h
-asn1_lib.o: ../../include/openssl/bio.h ../../include/openssl/bn.h
-asn1_lib.o: ../../include/openssl/buffer.h ../../include/openssl/crypto.h
-asn1_lib.o: ../../include/openssl/e_os2.h ../../include/openssl/err.h
-asn1_lib.o: ../../include/openssl/lhash.h ../../include/openssl/opensslconf.h
+asn1_lib.o: ../../include/openssl/asn1_mac.h ../../include/openssl/bio.h
+asn1_lib.o: ../../include/openssl/bn.h ../../include/openssl/buffer.h
+asn1_lib.o: ../../include/openssl/crypto.h ../../include/openssl/e_os2.h
+asn1_lib.o: ../../include/openssl/err.h ../../include/openssl/lhash.h
+asn1_lib.o: ../../include/openssl/opensslconf.h
 asn1_lib.o: ../../include/openssl/opensslv.h ../../include/openssl/ossl_typ.h
 asn1_lib.o: ../../include/openssl/safestack.h ../../include/openssl/stack.h
 asn1_lib.o: ../../include/openssl/symhacks.h ../cryptlib.h asn1_lib.c

diff --git a/crypto/bio/b_sock.c b/crypto/bio/b_sock.c
index dcaef68..45bd7c4 100644
--- a/crypto/bio/b_sock.c
+++ b/crypto/bio/b_sock.c

@@ -484,7 +484,11 @@
 	{
 	int i;
 
+#ifdef __DJGPP__
+	i=ioctlsocket(fd,type,(char *)arg);
+#else
 	i=ioctlsocket(fd,type,arg);
+#endif /* __DJGPP__ */
 	if (i < 0)
 		SYSerr(SYS_F_IOCTLSOCKET,get_last_socket_error());
 	return(i);

diff --git a/crypto/bn/bn_mul.c b/crypto/bn/bn_mul.c
index fd598b8..b03458d 100644
--- a/crypto/bn/bn_mul.c
+++ b/crypto/bn/bn_mul.c

@@ -66,7 +66,7 @@
 #include "cryptlib.h"
 #include "bn_lcl.h"
 
-#if defined(OPENSSL_NO_ASM) || !(defined(__i386) || defined(__i386__))/* Assembler implementation exists only for x86 */
+#if defined(OPENSSL_NO_ASM) || !(defined(__i386) || defined(__i386__)) || defined(__DJGPP__) /* Assembler implementation exists only for x86 */
 /* Here follows specialised variants of bn_add_words() and
    bn_sub_words().  They have the property performing operations on
    arrays of different sizes.  The sizes of those arrays is expressed through

diff --git a/crypto/des/read_pwd.c b/crypto/des/read_pwd.c
index 0000019..9061935 100644
--- a/crypto/des/read_pwd.c
+++ b/crypto/des/read_pwd.c

@@ -246,7 +246,7 @@
 	long status;
 	unsigned short channel = 0;
 #else
-#ifndef OPENSSL_SYS_MSDOS
+#if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__)
 	TTY_STRUCT tty_orig,tty_new;
 #endif
 #endif

diff --git a/crypto/rand/rand_egd.c b/crypto/rand/rand_egd.c
index 97ed12c..abc3ac2 100644
--- a/crypto/rand/rand_egd.c
+++ b/crypto/rand/rand_egd.c

@@ -94,7 +94,7 @@
  *   RAND_egd() is a wrapper for RAND_egd_bytes() with numbytes=255.
  */
 
-#if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS)
+#if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS) || defined(__DJGPP__)
 int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes)
 	{
 	return(-1);

diff --git a/crypto/ui/ui_openssl.c b/crypto/ui/ui_openssl.c
index 4e12165..2c2fbc0 100644
--- a/crypto/ui/ui_openssl.c
+++ b/crypto/ui/ui_openssl.c

@@ -269,7 +269,7 @@
 static long status;
 static unsigned short channel = 0;
 #else
-#ifndef OPENSSL_SYS_MSDOS
+#if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__)
 static TTY_STRUCT tty_orig,tty_new;
 #endif
 #endif

diff --git a/e_os.h b/e_os.h
index f216936..00edebe 100644
--- a/e_os.h
+++ b/e_os.h

@@ -191,6 +191,14 @@
 
 #if (defined(WINDOWS) || defined(MSDOS))
 
+#  ifdef __DJGPP__
+#    include <unistd.h>
+#    include <sys/stat.h>
+#    define _setmode setmode
+#    define _O_TEXT O_TEXT
+#    define _O_BINARY O_BINARY
+#  endif /* __DJGPP__ */
+
 #  ifndef S_IFDIR
 #    define S_IFDIR	_S_IFDIR
 #  endif
@@ -336,7 +344,7 @@
 /*************/
 
 #ifdef USE_SOCKETS
-#  if defined(WINDOWS) || defined(MSDOS)
+#  if (defined(WINDOWS) || defined(MSDOS)) && !defined(__DJGPP__)
       /* windows world */
 
 #    ifdef OPENSSL_NO_SOCK
@@ -423,7 +431,9 @@
 #    define SSLeay_Write(a,b,c)    write((a),(b),(c))
 #    define SHUTDOWN(fd)    { shutdown((fd),0); closesocket((fd)); }
 #    define SHUTDOWN2(fd)   { shutdown((fd),2); closesocket((fd)); }
+#    ifndef INVALID_SOCKET
 #    define INVALID_SOCKET	(-1)
+#    endif /* INVALID_SOCKET */
 #  endif
 #endif
 

diff --git a/test/tcrl b/test/tcrl
index acaf8f3..f71ef7a 100644
--- a/test/tcrl
+++ b/test/tcrl

@@ -1,6 +1,10 @@
 #!/bin/sh
 
-PATH=../apps:$PATH
+if test "$OSTYPE" = msdosdjgpp; then
+    PATH=../apps\;$PATH
+else
+    PATH=../apps:$PATH
+fi
 export PATH
 
 cmd='../apps/openssl crl'

diff --git a/test/testca b/test/testca
index 88c186b..8215ebb 100644
--- a/test/testca
+++ b/test/testca

@@ -1,7 +1,11 @@
 #!/bin/sh
 
 SH="/bin/sh"
-PATH=../apps:$PATH
+if test "$OSTYPE" = msdosdjgpp; then
+    PATH=./apps\;../apps\;$PATH
+else
+    PATH=../apps:$PATH
+fi
 export SH PATH
 
 SSLEAY_CONFIG="-config CAss.cnf"

diff --git a/test/testgen b/test/testgen
index 6a4b6b9..55c496f 100644
--- a/test/testgen
+++ b/test/testgen

@@ -6,7 +6,11 @@
 
 /bin/rm -f $T.1 $T.2 $T.key
 
-PATH=../apps:$PATH;
+if test "$OSTYPE" = msdosdjgpp; then
+    PATH=../apps\;$PATH;
+else
+    PATH=../apps:$PATH;
+fi
 export PATH
 
 echo "generating certificate request"

diff --git a/test/tpkcs7 b/test/tpkcs7
index 15bbba4..cf3bd9f 100644
--- a/test/tpkcs7
+++ b/test/tpkcs7

@@ -1,6 +1,10 @@
 #!/bin/sh
 
-PATH=../apps:$PATH
+if test "$OSTYPE" = msdosdjgpp; then
+    PATH=../apps\;$PATH
+else
+    PATH=../apps:$PATH
+fi
 export PATH
 
 cmd='../apps/openssl pkcs7'

diff --git a/test/tpkcs7d b/test/tpkcs7d
index 46e5aa2..18f9311 100644
--- a/test/tpkcs7d
+++ b/test/tpkcs7d

@@ -1,6 +1,10 @@
 #!/bin/sh
 
-PATH=../apps:$PATH
+if test "$OSTYPE" = msdosdjgpp; then
+    PATH=../apps\;$PATH
+else
+    PATH=../apps:$PATH
+fi
 export PATH
 
 cmd='../apps/openssl pkcs7'

diff --git a/test/treq b/test/treq
index 9f5eb7e..47a8273 100644
--- a/test/treq
+++ b/test/treq

@@ -1,6 +1,10 @@
 #!/bin/sh
 
-PATH=../apps:$PATH
+if test "$OSTYPE" = msdosdjgpp; then
+    PATH=../apps\;$PATH
+else
+    PATH=../apps:$PATH
+fi
 export PATH
 
 cmd='../apps/openssl req -config ../apps/openssl.cnf'

diff --git a/test/trsa b/test/trsa
index bd6c076..413e2ec 100644
--- a/test/trsa
+++ b/test/trsa

@@ -1,6 +1,10 @@
 #!/bin/sh
 
-PATH=../apps:$PATH
+if test "$OSTYPE" = msdosdjgpp; then
+    PATH=../apps\;$PATH
+else
+    PATH=../apps:$PATH
+fi
 export PATH
 
 if ../apps/openssl no-rsa; then

diff --git a/test/tsid b/test/tsid
index 9e08545..40a1dfa 100644
--- a/test/tsid
+++ b/test/tsid

@@ -1,6 +1,10 @@
 #!/bin/sh
 
-PATH=../apps:$PATH
+if test "$OSTYPE" = msdosdjgpp; then
+    PATH=../apps\;$PATH
+else
+    PATH=../apps:$PATH
+fi
 export PATH
 
 cmd='../apps/openssl sess_id'

diff --git a/test/tx509 b/test/tx509
index 35169f3..d380963 100644
--- a/test/tx509
+++ b/test/tx509

@@ -1,6 +1,10 @@
 #!/bin/sh
 
-PATH=../apps:$PATH
+if test "$OSTYPE" = msdosdjgpp; then
+    PATH=../apps\;$PATH
+else
+    PATH=../apps:$PATH
+fi
 export PATH
 
 cmd='../apps/openssl x509'

diff --git a/util/point.sh b/util/point.sh
index 47543c8..ce7dcc5 100755
--- a/util/point.sh
+++ b/util/point.sh

@@ -1,6 +1,10 @@
 #!/bin/sh
 
 rm -f $2
-ln -s $1 $2
+if test "$OSTYPE" = msdosdjgpp; then
+    cp $1 $2
+else
+    ln -s $1 $2
+fi
 echo "$2 => $1"