Adding upstream version 1:10.11.6.upstream/1%10.11.6upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 120 insertions, 0 deletions

diff --git a/mysys/my_write.c b/mysys/my_write.c
new file mode 100644
index 00000000..06914b25
--- /dev/null
+++ b/mysys/my_write.c
@@ -0,0 +1,120 @@
+/* Copyright (c) 2000, 2016, Oracle and/or its affiliates.
+   Copyright (c) 2011, 2016, MariaDB
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335  USA */
+
+#include "mysys_priv.h"
+#include "mysys_err.h"
+#include <errno.h>
+
+
+	/* Write a chunk of bytes to a file */
+
+size_t my_write(File Filedes, const uchar *Buffer, size_t Count, myf MyFlags)
+{
+  size_t writtenbytes, written;
+  uint errors;
+  DBUG_ENTER("my_write");
+  DBUG_PRINT("my",("fd: %d  Buffer: %p  Count: %lu  MyFlags: %lu",
+		   Filedes, Buffer, (ulong) Count, MyFlags));
+  errors= 0; written= 0;
+  if (!(MyFlags & (MY_WME | MY_FAE | MY_FNABP)))
+    MyFlags|= my_global_flags;
+
+  /* The behavior of write(fd, buf, 0) is not portable */
+  if (unlikely(!Count))
+    DBUG_RETURN(0);
+  
+  for (;;)
+  {
+#ifdef _WIN32
+    if(Filedes < 0)
+    {
+      my_errno= errno= EBADF;
+      DBUG_RETURN((size_t)-1);
+    }
+    writtenbytes= my_win_write(Filedes, Buffer, Count);
+#else
+    writtenbytes= write(Filedes, Buffer, Count);
+#endif
+
+    /**
+       To simulate the write error set the errno = error code
+       and the number pf written bytes to -1.
+     */
+    DBUG_EXECUTE_IF ("simulate_file_write_error",
+                     if (!errors) {
+                       errno= ENOSPC;
+                       writtenbytes= (size_t) -1;
+                     });
+
+    if (writtenbytes == Count)
+      break;
+    if (writtenbytes != (size_t) -1)
+    {						/* Safeguard */
+      written+= writtenbytes;
+      Buffer+= writtenbytes;
+      Count-= writtenbytes;
+    }
+    my_errno= errno;
+    DBUG_PRINT("error",("Write only %ld bytes, error: %d",
+			(long) writtenbytes, my_errno));
+#ifndef NO_BACKGROUND
+    if (my_thread_var->abort)
+      MyFlags&= ~ MY_WAIT_IF_FULL;		/* End if aborted by user */
+
+    if ((my_errno == ENOSPC || my_errno == EDQUOT) &&
+        (MyFlags & MY_WAIT_IF_FULL))
+    {
+      wait_for_free_space(my_filename(Filedes), errors);
+      errors++;
+      continue;
+    }
+
+    if ((writtenbytes == 0 || writtenbytes == (size_t) -1))
+    {
+      if (my_errno == EINTR)
+      {
+        DBUG_PRINT("debug", ("my_write() was interrupted and returned %ld",
+                             (long) writtenbytes));
+        continue;                               /* Interrupted */
+      }
+
+      if (!writtenbytes && !errors++)		/* Retry once */
+      {
+        /* We may come here if the file quota is exeeded */
+        errno= EFBIG;				/* Assume this is the error */
+        continue;
+      }
+    }
+    else
+      continue;					/* Retry */
+#endif
+
+    /* Don't give a warning if it's ok that we only write part of the data */
+    if (MyFlags & (MY_NABP | MY_FNABP))
+    {
+      if (MyFlags & (MY_WME | MY_FAE | MY_FNABP))
+      {
+	my_error(EE_WRITE, MYF(ME_BELL | (MyFlags & (ME_NOTE | ME_ERROR_LOG))),
+		 my_filename(Filedes),my_errno);
+      }
+      DBUG_RETURN(MY_FILE_ERROR);		/* Error on read */
+    }
+    break;					/* Return bytes written */
+  }
+  if (MyFlags & (MY_NABP | MY_FNABP))
+    DBUG_RETURN(0);                             /* Want only errors */
+  DBUG_RETURN(writtenbytes+written);
+} /* my_write */