1 files changed, 138 insertions, 0 deletions
diff --git a/mariadb-connector-c-v_2.3.7/libmariadb/my_symlink.c b/mariadb-connector-c-v_2.3.7/libmariadb/my_symlink.c
new file mode 100644
index 0000000..dd23efe
--- /dev/null
+++ b/mariadb-connector-c-v_2.3.7/libmariadb/my_symlink.c
@@ -0,0 +1,138 @@
+/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
+   
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library 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
+   Library General Public License for more details.
+   
+   You should have received a copy of the GNU Library General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+   MA 02111-1301, USA */
+
+#include "mysys_priv.h"
+#include "mysys_err.h"
+#include <m_string.h>
+#include <errno.h>
+#ifdef HAVE_REALPATH
+#include <sys/param.h>
+#include <sys/stat.h>
+#endif
+
+/*
+  Reads the content of a symbolic link
+  If the file is not a symbolic link, return the original file name in to.
+  Returns: 0 if table was a symlink,
+           1 if table was a normal file
+	   -1 on error.
+*/
+
+int my_readlink(char *to, const char *filename, myf MyFlags)
+{
+#ifndef HAVE_READLINK
+  strmov(to,filename);
+  return 1;
+#else
+  int result=0;
+  int length;
+  DBUG_ENTER("my_readlink");
+
+  if ((length=readlink(filename, to, FN_REFLEN-1)) < 0)
+  {
+    /* Don't give an error if this wasn't a symlink */
+    if ((my_errno=errno) == EINVAL)
+    {
+      result= 1;
+      strmov(to,filename);
+    }
+    else
+    {
+      if (MyFlags & MY_WME)
+	my_error(EE_CANT_READLINK, MYF(0), filename, errno);
+      result= -1;
+    }
+  }
+  else
+    to[length]=0;
+  DBUG_RETURN(result);
+#endif /* HAVE_READLINK */
+}
+
+
+/* Create a symbolic link */
+
+int my_symlink(const char *content, const char *linkname, myf MyFlags)
+{
+#ifndef HAVE_READLINK
+  return 0;
+#else
+  int result;
+  DBUG_ENTER("my_symlink");
+
+  result= 0;
+  if (symlink(content, linkname))
+  {
+    result= -1;
+    my_errno=errno;
+    if (MyFlags & MY_WME)
+      my_error(EE_CANT_SYMLINK, MYF(0), linkname, content, errno);
+  }
+  DBUG_RETURN(result);
+#endif /* HAVE_READLINK */
+}
+
+/*
+  Resolve all symbolic links in path
+  'to' may be equal to 'filename'
+
+  Because purify gives a lot of UMR errors when using realpath(),
+  this code is disabled when using purify.
+
+  If MY_RESOLVE_LINK is given, only do realpath if the file is a link.
+*/
+
+#if defined(SCO)
+#define BUFF_LEN 4097
+#elif defined(MAXPATHLEN)
+#define BUFF_LEN MAXPATHLEN
+#else
+#define BUFF_LEN FN_LEN
+#endif
+
+int my_realpath(char *to, const char *filename, myf MyFlags)
+{
+#if defined(HAVE_REALPATH) && !defined(HAVE_purify) && !defined(HAVE_BROKEN_REALPATH)
+  int result=0;
+  char buff[BUFF_LEN];
+  struct stat stat_buff;
+  DBUG_ENTER("my_realpath");
+
+  if (!(MyFlags & MY_RESOLVE_LINK) ||
+      (!lstat(filename,&stat_buff) && S_ISLNK(stat_buff.st_mode)))
+  {
+    char *ptr;
+    if ((ptr=realpath(filename,buff)))
+      strmake(to,ptr,FN_REFLEN-1);
+    else
+    {
+      /* Realpath didn't work;  Use original name */
+      my_errno=errno;
+      if (MyFlags & MY_WME)
+	my_error(EE_REALPATH, MYF(0), filename, my_errno);
+      if (to != filename)
+	strmov(to,filename);
+      result= -1;
+    }
+  }
+  DBUG_RETURN(result);
+#else
+  if (to != filename)
+    strmov(to,filename);
+  return 0;
+#endif
+}