DJGPP adjustments

* Configure: Replaced -DTERMIO by -DTERMIOS in CFLAGS.

* crypto/bio/bss_dgram.c [WATT32]: Remove obsolete redefinition of
  function names: sock_write, sock_read and sock_puts.

* crypto/bio/bss_sock.c [WATT32]: For Watt-32 2.2.11 sock_write,
  sock_read and sock_puts are redefined to their private names so
  their names must be undefined first before they can be redefined
  again.

* crypto/bio/bss_file.c (file_fopen) [__DJGPP__]: Make a copy of the
  passed file name and replace the leading dots in the dirname part
  and the basname part of the file name, unless LFN is supported.

* e_os.h [__DJGPP__]: Undefine macro DEVRANDOM_EGD. Neither MS-DOS nor
  FreeDOS provide 'egd' sockets.
  New macro HAS_LFN_SUPPORT checks if underlying file system supports
  long file names or not.
  Include sys/un.h.
  Define WATT32_NO_OLDIES.

* INSTALL.DJGPP: Update URL of WATT-32 library.

Submitted by Juan Manuel Guerrero <juan.guerrero@gmx.de>

RT#4217

Reviewed-by: Andy Polyakov <appro@openssl.org>

1 files changed, 30 insertions, 0 deletions

diff --git a/crypto/bio/bss_file.c b/crypto/bio/bss_file.c
index a37e89d935..3c056604c8 100644
--- a/crypto/bio/bss_file.c
+++ b/crypto/bio/bss_file.c
@@ -154,6 +154,36 @@ static FILE *file_fopen(const char *filename, const char *mode)
     } else if (GetLastError() == ERROR_NO_UNICODE_TRANSLATION) {
         file = fopen(filename, mode);
     }
+#  elif defined(__DJGPP__)
+    {
+        char *newname = NULL;
+
+        if (!HAS_LFN_SUPPORT(filename)) {
+            char *iterator;
+            char lastchar;
+
+            newname = OPENSSL_malloc(strlen(filename) + 1);
+            if (newname == NULL)
+                return NULL;
+
+            for(iterator = newname, lastchar = '\0';
+                *filename; filename++, iterator++) {
+                if (lastchar == '/' && filename[0] == '.'
+                    && filename[1] != '.' && filename[1] != '/') {
+                    /* Leading dots are not permitted in plain DOS. */
+                    *iterator = '_';
+                } else {
+                    *iterator = *filename;
+                }
+                lastchar = *filename;
+            }
+            *iterator = '\0';
+            filename = newname;
+        }
+        file = fopen(filename, mode);
+
+        OPENSSL_free(newname);
+    }
 #  else
     file = fopen(filename, mode);
 #  endif