Index: src/os_unix.c
==================================================================
--- src/os_unix.c
+++ src/os_unix.c
@@ -549,10 +549,19 @@
     if( aSyscall[i].pCurrent!=0 ) return aSyscall[i].zName;
   }
   return 0;
 }
 
+/*
+** Do not accept any file descriptor less than this value, in order to avoid
+** opening database file using file descriptors that are commonly used for 
+** standard input, output, and error.
+*/
+#ifndef SQLITE_MINIMUM_FILE_DESCRIPTOR
+# define SQLITE_MINIMUM_FILE_DESCRIPTOR 3
+#endif
+
 /*
 ** Invoke open().  Do so multiple times, until it either succeeds or
 ** fails for some reason other than EINTR.
 **
 ** If the file creation mode "m" is 0 then set it to the default for
@@ -579,11 +588,11 @@
 #endif
     if( fd<0 ){
       if( errno==EINTR ) continue;
       break;
     }
-    if( fd>2 ) break;
+    if( fd>=SQLITE_MINIMUM_FILE_DESCRIPTOR ) break;
     osClose(fd);
     sqlite3_log(SQLITE_WARNING, 
                 "attempt to open \"%s\" as file descriptor %d", z, fd);
     fd = -1;
     if( osOpen("/dev/null", f, m)<0 ) break;