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authorXanadu <none@none>2010-07-20 02:49:28 +0200
committerXanadu <none@none>2010-07-20 02:49:28 +0200
commit79622802f397258ee0f34327ba3ae6977ca3e7ff (patch)
tree1868946c234ab9ee256a6b7766a15713eae94235 /externals/mysql/mysys/my_symlink.c
parent7dd2dc91816ab8b3bc3b99a1b1c99c7ea314d5a8 (diff)
parentf906976837502fa5aa81b982b901d1509f5aa0c4 (diff)
Merge. Revision history for source files should be all back now.
--HG-- branch : trunk rename : sql/CMakeLists.txt => sql/tools/CMakeLists.txt rename : src/server/game/Pools/PoolHandler.cpp => src/server/game/Pools/PoolMgr.cpp rename : src/server/game/Pools/PoolHandler.h => src/server/game/Pools/PoolMgr.h rename : src/server/game/PrecompiledHeaders/NixCorePCH.cpp => src/server/game/PrecompiledHeaders/gamePCH.cpp rename : src/server/game/PrecompiledHeaders/NixCorePCH.h => src/server/game/PrecompiledHeaders/gamePCH.h
Diffstat (limited to 'externals/mysql/mysys/my_symlink.c')
-rw-r--r--externals/mysql/mysys/my_symlink.c153
1 files changed, 153 insertions, 0 deletions
diff --git a/externals/mysql/mysys/my_symlink.c b/externals/mysql/mysys/my_symlink.c
new file mode 100644
index 00000000000..258e227bb7b
--- /dev/null
+++ b/externals/mysql/mysys/my_symlink.c
@@ -0,0 +1,153 @@
+/* Copyright (C) 2000 MySQL AB
+
+ 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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.
+
+ RETURN
+ 0 If filename was a symlink, (to will be set to value of symlink)
+ 1 If filename was a normal file (to will be set to filename)
+ -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_PRINT("exit" ,("result: %d", result));
+ 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");
+ DBUG_PRINT("enter",("content: %s linkname: %s", content, linkname));
+
+ 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);
+ }
+ else if ((MyFlags & MY_SYNC_DIR) && my_sync_dir_by_file(linkname, MyFlags))
+ result= -1;
+ DBUG_RETURN(result);
+#endif /* HAVE_READLINK */
+}
+
+#if defined(SCO)
+#define BUFF_LEN 4097
+#elif defined(MAXPATHLEN)
+#define BUFF_LEN MAXPATHLEN
+#else
+#define BUFF_LEN FN_LEN
+#endif
+
+
+int my_is_symlink(const char *filename __attribute__((unused)))
+{
+#if defined (HAVE_LSTAT) && defined (S_ISLNK)
+ struct stat stat_buff;
+ return !lstat(filename, &stat_buff) && S_ISLNK(stat_buff.st_mode);
+#elif defined (_WIN32)
+ DWORD dwAttr = GetFileAttributes(filename);
+ return (dwAttr != INVALID_FILE_ATTRIBUTES) &&
+ (dwAttr & FILE_ATTRIBUTE_REPARSE_POINT);
+#else /* No symlinks */
+ return 0;
+#endif
+}
+
+
+/*
+ Resolve all symbolic links in path
+ 'to' may be equal to 'filename'
+*/
+
+int my_realpath(char *to, const char *filename,
+ myf MyFlags __attribute__((unused)))
+{
+#if defined(HAVE_REALPATH) && !defined(HAVE_BROKEN_REALPATH)
+ int result=0;
+ char buff[BUFF_LEN];
+ char *ptr;
+ DBUG_ENTER("my_realpath");
+
+ DBUG_PRINT("info",("executing realpath"));
+ if ((ptr=realpath(filename,buff)))
+ strmake(to,ptr,FN_REFLEN-1);
+ else
+ {
+ /*
+ Realpath didn't work; Use my_load_path() which is a poor substitute
+ original name but will at least be able to resolve paths that starts
+ with '.'.
+ */
+ DBUG_PRINT("error",("realpath failed with errno: %d", errno));
+ my_errno=errno;
+ if (MyFlags & MY_WME)
+ my_error(EE_REALPATH, MYF(0), filename, my_errno);
+ my_load_path(to, filename, NullS);
+ result= -1;
+ }
+ DBUG_RETURN(result);
+#else
+ my_load_path(to, filename, NullS);
+ return 0;
+#endif
+}