enable LITE feature in Posix preload library

docs/PreReleaseNotes.txt

@@ -10,6 +10,7 @@ Prerelease Notes
   * **{Server]** Add org and role types to AuthDB authorization.
   * **[Server]** Handle systemd socket inheritance.
   * **[Proxy/Posix]** Allow Name2Name to populate cache using the LFN.
+  * **[Posix]** enable LITE feature in Posix preload library.
 
 + **Major bug fixes**
 

src/XrdPosix/XrdPosixPreload.cc

@@ -31,6 +31,7 @@
 #include <sys/types.h>
 #include <stdarg.h>
 #include <unistd.h>
+#include <stdlib.h>
 
 #include "XrdPosix/XrdPosixLinkage.hh"
 #include "XrdPosix/XrdPosixOsDep.hh"
@@ -87,7 +88,7 @@ int     chdir(const char *path)
 {
    static int Init = Xunix.Init(&Init);
 
-   return XrdPosix_Chdir(path);
+   return (getenv("XRD_POSIX_PRELOAD_LITE")? Xunix.Chdir(path) : XrdPosix_Chdir(path));
 }
 }
 
@@ -115,7 +116,7 @@ int     closedir(DIR *dirp)
 {
    static int Init = Xunix.Init(&Init);
 
-   return XrdPosix_Closedir(dirp);
+   return (getenv("XRD_POSIX_PRELOAD_LITE")? Xunix.Closedir(dirp) : XrdPosix_Closedir(dirp));
 }
 }
 
@@ -452,7 +453,7 @@ int     mkdir(const char *path, mode_t mode)
 {
    static int Init = Xunix.Init(&Init);
 
-   return XrdPosix_Mkdir(path, mode);
+   return (getenv("XRD_POSIX_PRELOAD_LITE")? Xunix.Mkdir(path, mode) : XrdPosix_Mkdir(path, mode));
 }
 }
 
@@ -485,7 +486,7 @@ DIR*    opendir(const char *path)
 {
    static int Init = Xunix.Init(&Init);
 
-   return XrdPosix_Opendir(path);
+   return (getenv("XRD_POSIX_PRELOAD_LITE")? Xunix.Opendir(path) : XrdPosix_Opendir(path));
 }
 }
 
@@ -571,7 +572,7 @@ struct dirent64* readdir64(DIR *dirp)
 {
    static int Init = Xunix.Init(&Init);
 
-   return XrdPosix_Readdir64(dirp);
+   return (getenv("XRD_POSIX_PRELOAD_LITE")? Xunix.Readdir64(dirp) : XrdPosix_Readdir64(dirp));
 }
 }
 
@@ -585,7 +586,8 @@ int     readdir64_r(DIR *dirp, struct dirent64 *entry, struct dirent64 **result)
 {
    static int Init = Xunix.Init(&Init);
 
-   return XrdPosix_Readdir64_r(dirp, entry, result);
+   return (getenv("XRD_POSIX_PRELOAD_LITE")? Xunix.Readdir64_r(dirp, entry, result) :
+                                             XrdPosix_Readdir64_r(dirp, entry, result));
 }
 }
 
@@ -599,7 +601,7 @@ int     rename(const char *oldpath, const char *newpath)
 {
    static int Init = Xunix.Init(&Init);
 
-   return XrdPosix_Rename(oldpath, newpath);
+   return (getenv("XRD_POSIX_PRELOAD_LITE")? Xunix.Rename(oldpath, newpath) : XrdPosix_Rename(oldpath, newpath));
 }
 }
 
@@ -614,7 +616,7 @@ void    rewinddir(DIR *dirp)
 {
    static int Init = Xunix.Init(&Init);
 
-   XrdPosix_Rewinddir(dirp);
+   (getenv("XRD_POSIX_PRELOAD_LITE")? Xunix.Rewinddir(dirp) : XrdPosix_Rewinddir(dirp));
 }
 }
 #endif
@@ -629,7 +631,7 @@ int     rmdir(const char *path)
 {
    static int Init = Xunix.Init(&Init);
 
-   return XrdPosix_Rmdir(path);
+   return (getenv("XRD_POSIX_PRELOAD_LITE")? Xunix.Rmdir(path) : XrdPosix_Rmdir(path));
 }
 }
 
@@ -643,7 +645,7 @@ void    seekdir(DIR *dirp, long loc)
 {
    static int Init = Xunix.Init(&Init);
 
-   XrdPosix_Seekdir(dirp, loc);
+   (getenv("XRD_POSIX_PRELOAD_LITE")? Xunix.Seekdir(dirp, loc) : XrdPosix_Seekdir(dirp, loc));
 }
 }
 
@@ -705,7 +707,7 @@ long    telldir(DIR *dirp)
 {
    static int Init = Xunix.Init(&Init);
 
-   return XrdPosix_Telldir(dirp);
+   return (getenv("XRD_POSIX_PRELOAD_LITE")? Xunix.Telldir(dirp) : XrdPosix_Telldir(dirp));
 }
 }
 
@@ -733,7 +735,7 @@ int     unlink(const char *path)
 {
    static int Init = Xunix.Init(&Init);
 
-   return XrdPosix_Unlink(path);
+   return (getenv("XRD_POSIX_PRELOAD_LITE")? Xunix.Unlink(path) : XrdPosix_Unlink(path));
 }
 }
 

src/XrdPosix/XrdPosixPreload32.cc

@@ -49,6 +49,7 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
+#include <stdlib.h>
 
 #if defined(__APPLE__) || defined(__FreeBSD__)
 #include <sys/param.h>
@@ -323,6 +324,7 @@ int        lstat(         const char *path, struct stat *buf)
 #else
    struct stat64 buf64;
    int rc;
+
    if ((rc = XrdPosix_Lstat(path, (struct stat *)&buf64))) return rc;
    return XrdPosix_CopyStat(buf, buf64);
 #endif
@@ -379,7 +381,12 @@ struct dirent* readdir(DIR *dirp)
    static int Init = Xunix.Init(&Init);
    struct dirent64 *dp64;
 
-   if (!(dp64 = XrdPosix_Readdir64(dirp))) return 0;
+   if ( getenv("XRD_POSIX_PRELOAD_LITE") ) 
+   {
+       if (!(dp64 = Xunix.Readdir64(dirp))) return 0;
+   }
+   else
+       if (!(dp64 = XrdPosix_Readdir64(dirp))) return 0;
 
 #if !defined(__APPLE__) && !defined(_LP64) && !defined(__LP64__)
    if (XrdPosix_CopyDirent((struct dirent *)dp64, dp64)) return 0;
@@ -408,8 +415,12 @@ int     readdir_r(DIR *dirp, struct dirent *entry, struct dirent **result)
    struct dirent64 *mydirent;
    int rc;
 
-   if ((rc = XrdPosix_Readdir64_r(dirp, dp64, &mydirent)))
-      return rc;
+   if ( getenv("XRD_POSIX_PRELOAD_LITE") ) 
+   {
+       if ((rc = Xunix.Readdir64_r(dirp, dp64, &mydirent))) return rc;
+   }
+   else
+       if ((rc = XrdPosix_Readdir64_r(dirp, dp64, &mydirent))) return rc;
 
    if (!mydirent) {*result = 0; return 0;}