From f1fe9406fbd5195d5c8b0dbaf0f8dcadf4b6da1e Mon Sep 17 00:00:00 2001
From: eliz <eliz>
Date: Wed, 15 Mar 2000 11:44:17 +0000
Subject: [PATCH] (read_history_range, history_truncate_file, history_do_write)
 [__MSDOS__]: Allow for a `_' to replace the leading dot in hard-wrired file
 names.

---
 readline/histfile.c | 47 ++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 46 insertions(+), 1 deletion(-)

diff --git a/readline/histfile.c b/readline/histfile.c
index 81dda57d0f..9437e99256 100644
--- a/readline/histfile.c
+++ b/readline/histfile.c
@@ -140,6 +140,16 @@ read_history_range (filename, from, to)
   input = history_filename (filename);
   file = open (input, O_RDONLY|O_BINARY, 0666);
 
+
+#ifdef __MSDOS__
+  /* MSDOS doesn't allow leading dots in file names.  Try again
+     with the dot replaced by an underscore.  */
+  if (file < 0 && !filename)
+    {
+      input[strlen (input) - 8] = '_';
+      file = open (input, O_RDONLY|O_BINARY, 0666);
+    }
+#endif
   if ((file < 0) || (fstat (file, &finfo) == -1))
     goto error_and_exit;
 
@@ -155,7 +165,11 @@ read_history_range (filename, from, to)
     }
 
   buffer = xmalloc (file_size + 1);
+#if 0
   if (read (file, buffer, file_size) != file_size)
+#else
+  if (read (file, buffer, file_size) < 0)
+#endif
     {
   error_and_exit:
       if (file >= 0)
@@ -217,7 +231,7 @@ read_history_range (filename, from, to)
 int
 history_truncate_file (fname, lines)
      char *fname;
-     register int lines;
+     int lines;
 {
   register int i;
   int file, chars_read;
@@ -229,6 +243,16 @@ history_truncate_file (fname, lines)
   filename = history_filename (fname);
   file = open (filename, O_RDONLY|O_BINARY, 0666);
 
+#ifdef __MSDOS__
+  /* MSDOS doesn't allow leading dots in file names.  Try again
+     with the dot replaced by an underscore.  */
+  if (file < 0 && !fname)
+    {
+      filename[strlen (filename) - 8] = '_';
+      file = open (filename, O_RDONLY|O_BINARY, 0666);
+    }
+#endif
+
   if (file == -1 || fstat (file, &finfo) == -1)
     goto truncate_exit;
 
@@ -276,6 +300,12 @@ history_truncate_file (fname, lines)
   if (i && ((file = open (filename, O_WRONLY|O_TRUNC|O_BINARY, 0600)) != -1))
     {
       write (file, buffer + i, file_size - i);
+
+#if defined (__BEOS__)
+      /* BeOS ignores O_TRUNC. */
+      ftruncate (file, file_size - i);
+#endif
+
       close (file);
     }
 
@@ -304,8 +334,23 @@ history_do_write (filename, nelements, overwrite)
 
   if ((file = open (output, mode, 0600)) == -1)
     {
+#ifdef __MSDOS__
+      /* MSDOS doesn't allow leading dots in file names.  If this is
+	 the default file name, try again with the dot replaced by an
+	 underscore.  */
+      if (!filename)
+	{
+	  output[strlen (output) - 8] = '_';
+	  if ((file = open (output, mode, 0600)) == -1)
+	    {
+	      FREE (output);
+	      return (errno);
+	    }
+	}
+#else
       FREE (output);
       return (errno);
+#endif
     }
 
   if (nelements > history_length)
-- 
2.11.0