# HG changeset patch
# User asl
# Date 1080559477 0
# Node ID 0ef97dc5b090f2d54c747f6bd8625fe6c9b50bc8
# Parent  956d016d5e0e0755af4ca2a4682f93419920f0fb
        * src/common/fopen.cxx:
        * src/common/stream.cxx:
        * include/io.inl:
        * include/stream.hxx:
        Split CYGSTREAM_READWRITE into CYGSTREAM_READWRITE_CREATE and
        CYGSTREAM_READWRITE_NOCREATE. This fixes fopen() with mode 'w+'
        which previously did not allow file creation.

diff --git a/packages/language/c/libc/stdio/current/ChangeLog b/packages/language/c/libc/stdio/current/ChangeLog
--- a/packages/language/c/libc/stdio/current/ChangeLog
+++ b/packages/language/c/libc/stdio/current/ChangeLog
@@ -1,3 +1,13 @@
+2004-03-29  Kelvin Lawson <klawson@ad-holdings.co.uk>
+
+	* src/common/fopen.cxx:
+	* src/common/stream.cxx:
+	* include/io.inl:
+	* include/stream.hxx:
+	Split CYGSTREAM_READWRITE into CYGSTREAM_READWRITE_CREATE and
+	CYGSTREAM_READWRITE_NOCREATE. This fixes fopen() with mode 'w+'
+	which previously did not allow file creation.
+
 2004-03-15  Jonathan Larmour  <jifl@eCosCentric.com>
 
 	* src/common/fileops.cxx (tmpnam): Only close if open() succeded.
diff --git a/packages/language/c/libc/stdio/current/include/io.inl b/packages/language/c/libc/stdio/current/include/io.inl
--- a/packages/language/c/libc/stdio/current/include/io.inl
+++ b/packages/language/c/libc/stdio/current/include/io.inl
@@ -84,9 +84,12 @@ inline Cyg_ErrNo cyg_stdio_open( const c
     case Cyg_StdioStream::CYG_STREAM_READ:
         mode = O_RDONLY;
         break;
-    case Cyg_StdioStream::CYG_STREAM_READWRITE:
+    case Cyg_StdioStream::CYG_STREAM_READWRITE_NOCREATE:
         mode = O_RDWR;
         break;
+    case Cyg_StdioStream::CYG_STREAM_READWRITE_CREATE:
+        mode = O_RDWR|O_CREAT|O_TRUNC;
+        break;
     }
 
     if( append )
diff --git a/packages/language/c/libc/stdio/current/include/stream.hxx b/packages/language/c/libc/stdio/current/include/stream.hxx
--- a/packages/language/c/libc/stdio/current/include/stream.hxx
+++ b/packages/language/c/libc/stdio/current/include/stream.hxx
@@ -157,7 +157,8 @@ public:
     typedef enum {
         CYG_STREAM_READ,
         CYG_STREAM_WRITE,
-        CYG_STREAM_READWRITE
+        CYG_STREAM_READWRITE_NOCREATE,
+        CYG_STREAM_READWRITE_CREATE
     } OpenMode;
 
     // CONSTRUCTORS
@@ -168,8 +169,8 @@ public:
     // dev is a valid Cyg_Device_Table_t, although it does not have to
     // be a member of the device table object itself
     //
-    // open_mode is one of CYG_STREAM_READ, CYG_STREAM_WRITE or
-    // CYG_STREAM_READWRITE
+    // open_mode is one of CYG_STREAM_READ, CYG_STREAM_WRITE,
+    // CYG_STREAM_READWRITE_NOCREATE or CYG_STREAM_READWRITE_CREATE
     //
     // append is true if the file position should be set at EOF on opening
     //
diff --git a/packages/language/c/libc/stdio/current/include/stream.inl b/packages/language/c/libc/stdio/current/include/stream.inl
--- a/packages/language/c/libc/stdio/current/include/stream.inl
+++ b/packages/language/c/libc/stdio/current/include/stream.inl
@@ -446,27 +446,32 @@ Cyg_StdioStream::set_position( fpos_t po
     } //endif (whence != SEEK_END)
 
     Cyg_ErrNo err;
-    off_t newpos=pos;
 
-    err = cyg_stdio_lseek( my_device, &newpos, whence );
+    // Flush output if any present.
+    err = flush_output_unlocked();
 
     if( err == ENOERR )
     {
-        // Clean out the buffer. Flush output if any present,
-        // and clear any input out of input buffer and any ungot
-        // chars from unread buffer.
+        off_t newpos=pos;
+ 
+        // Clear any input out of input buffer and any ungot chars
+        // from unread buffer.
+        io_buf.drain_buffer();
     
-        err = flush_output_unlocked();
-        io_buf.drain_buffer();
 #ifdef CYGFUN_LIBC_STDIO_ungetc
         flags.unread_char_buf_in_use = false;
 #endif
 
         // Clear EOF indicator.
         flags.at_eof = false;
-        
-        // update stream pos
-        position = newpos;
+
+        // Seek the file to the correct place
+        err = cyg_stdio_lseek( my_device, &newpos, whence );
+       
+        if ( err == ENOERR) {
+          // update stream pos
+          position = newpos;
+        }
     }
     
     unlock_me();
diff --git a/packages/language/c/libc/stdio/current/src/common/fopen.cxx b/packages/language/c/libc/stdio/current/src/common/fopen.cxx
--- a/packages/language/c/libc/stdio/current/src/common/fopen.cxx
+++ b/packages/language/c/libc/stdio/current/src/common/fopen.cxx
@@ -112,7 +112,10 @@ process_mode( const char *mode, Cyg_Stdi
         *binary = true;
         break;
     case '+':
-        *rw = Cyg_StdioStream::CYG_STREAM_READWRITE;
+        if (mode[0] == 'r')
+	    *rw = Cyg_StdioStream::CYG_STREAM_READWRITE_NOCREATE;
+	else
+	    *rw = Cyg_StdioStream::CYG_STREAM_READWRITE_CREATE;
         break;
     default:
         return false;
@@ -123,7 +126,10 @@ process_mode( const char *mode, Cyg_Stdi
         *binary = true;
         break;
     case '+':
-        *rw = Cyg_StdioStream::CYG_STREAM_READWRITE;
+	if (mode[0] == 'r')
+            *rw = Cyg_StdioStream::CYG_STREAM_READWRITE_NOCREATE;
+	else
+            *rw = Cyg_StdioStream::CYG_STREAM_READWRITE_CREATE;
         break;
     default:
         return false;
diff --git a/packages/language/c/libc/stdio/current/src/common/stream.cxx b/packages/language/c/libc/stdio/current/src/common/stream.cxx
--- a/packages/language/c/libc/stdio/current/src/common/stream.cxx
+++ b/packages/language/c/libc/stdio/current/src/common/stream.cxx
@@ -107,7 +107,8 @@ void Cyg_StdioStream::initialize(cyg_std
     case CYG_STREAM_WRITE:
         flags.opened_for_write = true;
         break;
-    case CYG_STREAM_READWRITE:
+    case CYG_STREAM_READWRITE_NOCREATE:
+    case CYG_STREAM_READWRITE_CREATE:
         flags.opened_for_read = true;
         flags.opened_for_write = true;
         break;