added __open_2 wrapper for centos6

functions.cpp

@@ -37,6 +37,15 @@ extern "C" {
         return ((funcptr___open)libc___open)(passpath, flags, mode);
     }
 
+    int __open_2 (const char *file, int oflag){
+        initialize_passthrough_if_necessary();
+        log_msg(INFO, "opening file %s", file);
+        char passpath[PATH_MAX];
+        pass_getpath(file, passpath);
+        return ((funcptr___open_2)libc___open_2)(passpath, oflag);
+
+    }
+
     int open64(const char* pathname, int flags, ...){
         initialize_passthrough_if_necessary();
         log_msg(INFO, "open64 %s", pathname);

passthrough.cpp

@@ -26,6 +26,7 @@
 void* libc;
 void* libc_open;
 void* libc___open;
+void* libc___open_2;
 void* libc_open64;
 void* libc___open64;
 void* libc_openat;
@@ -263,6 +264,7 @@ static void initialize_passthrough() {
   libc = dlopen("libc.so.6", RTLD_LAZY); // TODO: link with correct libc, version vs. 32 bit vs. 64 bit
   libc_open = dlsym(libc, "open");
   libc___open = dlsym(libc, "__open");
+  libc___open_2 = dlsym(libc, "__open_2");
   libc_open64 = dlsym(libc, "open64");
   libc___open64 = dlsym(libc, "__open64");
   libc_openat = dlsym(libc, "openat");

passthrough.h

@@ -22,6 +22,7 @@ extern char* log_fn;
 
 typedef int (*funcptr_open)(const char*, int, mode_t);
 typedef int (*funcptr___open)(const char*, int, mode_t);
+typedef int (*funcptr___open_2)(const char *file, int oflag);
 typedef int (*funcptr_open64)(const char*, int, mode_t);
 typedef int (*funcptr___open64)(const char*, int, mode_t);
 typedef int (*funcptr_openat)(int, const char*, int);
@@ -81,6 +82,7 @@ typedef const char* (*funcptr_magic_file)(magic_t, const char* filename);
 
 extern void* libc_open;
 extern void* libc___open;
+extern void* libc___open_2;
 extern void* libc_open64;
 extern void* libc___open64;
 extern void* libc_openat;