The MockNameServer now stores for each entry in the archive namespace

the uid and gid of the CTA user that owns the file.

common/CMakeLists.txt

@@ -7,7 +7,7 @@ set (COMMON_LIB_SRC_FILES
   exception/Backtrace.cpp
   exception/Errnum.cpp
   exception/Exception.cpp
-  exception/strerror_r_wrapper.cpp
+  strerror_r_wrapper.cpp
   threading/ChildProcess.cpp
   threading/Mutex.cpp
   threading/Threading.cpp)

common/SmartFd.cpp

@@ -19,7 +19,6 @@
 #include "common/exception/Exception.hpp"
 #include "common/SmartFd.hpp"
 
-#include <errno.h>
 #include <unistd.h>
 
 //-----------------------------------------------------------------------------

common/Utils.cpp

@@ -17,9 +17,14 @@
  */
 
 #include "common/exception/Exception.hpp"
+#include "common/strerror_r_wrapper.hpp"
 #include "common/Utils.hpp"
 
+#include <attr/xattr.h>
+#include <memory>
 #include <sstream>
+#include <stdlib.h>
+#include <sys/types.h>
 #include <uuid/uuid.h>
 
 using cta::exception::Exception;
@@ -221,3 +226,142 @@ bool cta::Utils::endsWith(const std::string &str, const char c) {
     return c == str.at(str.length() - 1);
   }
 }
+
+//------------------------------------------------------------------------------
+// setXattr
+//------------------------------------------------------------------------------
+void cta::Utils::setXattr(const std::string &path, const std::string &name,
+  const std::string &value) {
+  if(setxattr(path.c_str(), name.c_str(), value.c_str(), value.length(), 0)) {
+    const int savedErrno = errno;
+    std::ostringstream msg;
+    msg << "Call to setxattr() failed: path=" << path << " name=" << name <<
+      " value=" << value << ": " << Utils::errnoToString(savedErrno);
+    throw exception::Exception(msg.str());
+  }
+}
+
+//------------------------------------------------------------------------------
+// getXattr
+//------------------------------------------------------------------------------
+std::string cta::Utils::getXattr(const std::string &path,
+  const std::string &name) {
+  const auto sizeOfValue = getxattr(path.c_str(), name.c_str(), NULL, 0);
+  if(0 > sizeOfValue) {
+    const int savedErrno = errno;
+    std::stringstream msg;
+    msg << "Call to getxattr() failed: path=" << path << " name=" << name <<
+      ": " << Utils::errnoToString(savedErrno);
+    throw exception::Exception(msg.str());
+  }
+
+  if(0 == sizeOfValue) {
+    return "";
+  }
+
+  std::unique_ptr<char[]> value(new char[sizeOfValue]);
+
+  if(0 > getxattr(path.c_str(), name.c_str(), (void *)value.get(),
+    sizeOfValue)) {
+    const int savedErrno = errno;
+    std::stringstream msg;      
+    msg << "Call to getxattr() failed: path=" << path << " name=" << name << 
+      ": " << Utils::errnoToString(savedErrno);
+    throw exception::Exception(msg.str());
+  }
+
+  return value.get();
+}
+
+//------------------------------------------------------------------------------
+// errnoToString
+//------------------------------------------------------------------------------
+std::string cta::Utils::errnoToString(const int errnoValue) throw() {
+  char buf[100];
+
+  if(!strerror_r_wrapper(errnoValue, buf, sizeof(buf))) {
+    return buf;
+  } else {
+    const int errnoSetByStrerror_r_wrapper = errno;
+    std::ostringstream oss;
+
+    switch(errnoSetByStrerror_r_wrapper) {
+    case EINVAL:
+      oss << "Failed to convert errnoValue to string: Invalid errnoValue"
+        ": errnoValue=" << errnoValue;
+      break;
+    case ERANGE:
+      oss << "Failed to convert errnoValue to string"
+        ": Destination buffer for error string is too small"
+        ": errnoValue=" << errnoValue;
+      break;
+    default:
+      oss << "Failed to convert errnoValue to string"
+        ": strerror_r_wrapper failed in an unknown way"
+        ": errnoValue=" << errnoValue;
+      break;
+    }
+
+    return oss.str();
+  }
+}
+
+
+//------------------------------------------------------------------------------
+// toUint16
+//------------------------------------------------------------------------------
+uint16_t cta::Utils::toUint16(const std::string &str) {
+  if(str.empty()) {
+    std::ostringstream msg;
+    msg << "Failed to convert empty string to uint16_t: An empty string is not"
+      " a valid unsigned integer";
+    throw exception::Exception(msg.str());
+  }
+
+  errno = 0;
+  const long int value = strtol(str.c_str(), (char **) NULL, 10);
+  const int savedErrno = errno;
+  if(savedErrno) {
+    std::ostringstream msg;
+    msg << "Failed to convert \'" << str << "' to uint16_t: " <<
+      errnoToString(savedErrno);
+    throw exception::Exception(msg.str());
+  }
+
+  if(0 > value) {
+    std::ostringstream msg;
+    msg << "Failed to convert \'" << str << "' to uint16_t: Negative number";
+    throw exception::Exception(msg.str());
+  }
+
+  if(65535 < value) {
+    std::ostringstream msg;
+    msg << "Failed to convert \'" << str << "' to uint16_t: Number too big";
+    throw exception::Exception(msg.str());
+  } 
+
+  return value;
+}
+
+//------------------------------------------------------------------------------
+// isValidUInt
+//------------------------------------------------------------------------------
+bool cta::Utils::isValidUInt(const std::string &str)
+  throw() {
+  // An empty string is not a valid unsigned integer
+  if(str.empty()) {
+    return false;
+  }
+
+  // For each character in the string
+  for(std::string::const_iterator itor = str.begin(); itor != str.end();
+    itor++) {
+
+    // If the current character is not a valid numerical digit
+    if(*itor < '0' || *itor > '9') {
+      return false;
+    }
+  }
+
+  return true;
+}

common/Utils.hpp

@@ -19,6 +19,7 @@
 #pragma once
 
 #include <list>
+#include <sstream>
 #include <string>
 #include <vector>
 
@@ -111,6 +112,63 @@ public:
    */
   static bool endsWith(const std::string &str, const char c);
 
+  /**
+   * Returns the string reprsentation of the specified value.
+   *
+   * @param value The value whose string representation is to be returned.
+   * @return The string reprsentation of the specified value.
+   */
+  template <typename T> static std::string toString(const T& value) {
+    std::ostringstream oss;
+    oss << value;
+    return oss.str();
+  }
+
+  /**
+   * C++ wrapper around the setxtarr() function.
+   *
+   * @param path The path to file to which the extended attribute belongs.
+   * @param name The name of the extended attribute.
+   * @param value The value of the extended attribute.
+   */
+  static void setXattr(const std::string &path, const std::string &name,
+    const std::string &value);
+
+  /**
+   * C++ wrapper around the getxattr() function.
+   *
+   * @param path The path to file to which the extended attribute belongs.
+   * @param name The name of the extended attribute.
+   * @return The value of the extended attribute.
+   */
+  static std::string getXattr(const std::string &path, const std::string &name);
+
+  /**
+   * Determines the string representation of the specified error number.
+   *
+   * Please note this method is thread safe.
+   *
+   * @param errnoValue The errno value.
+   * @return The string representation.
+   */
+  static std::string errnoToString(const int errnoValue) throw();
+
+  /**
+   * Converts the specified string to an unsigned integer.
+   *
+   * @param str The string.
+   * @return The unisgned integer.
+   */
+  static uint16_t toUint16(const std::string &str);
+
+  /**
+   * Checks if the specified string is a valid unsigned integer.
+   *
+   * @param str The string to be checked.
+   * @returns true if the string is a valid unsigned integer, else false.
+   */
+  static bool isValidUInt(const std::string &str) throw();
+
 }; // class Utils
 
 } // namespace cta

common/UtilsTest.cpp

@@ -259,4 +259,80 @@ TEST_F(cta_UtilsTest, endsWith_slash_just_a_slash) {
   ASSERT_TRUE(Utils::endsWith(str, '/'));
 } 
 
+TEST_F(cta_UtilsTest, errnoToString_EACCESS) {
+  using namespace cta;
+
+  const std::string str = Utils::errnoToString(EACCES);
+  ASSERT_EQ(std::string("Permission denied"), str);
+}
+
+TEST_F(cta_UtilsTest, toUint16_uint16_t) {
+  using namespace cta;
+
+  uint16_t i = 0;
+
+  ASSERT_NO_THROW(i = Utils::toUint16("12345"));
+  ASSERT_EQ((uint16_t)12345, i);
+}
+
+TEST_F(cta_UtilsTest, toUint16_zero) {
+  using namespace cta;
+
+  uint16_t i = 0;
+
+  ASSERT_NO_THROW(i = Utils::toUint16("0"));
+  ASSERT_EQ((uint16_t)0, i);
+}
+
+TEST_F(cta_UtilsTest, toUint16_65535) {
+  using namespace cta;
+
+  uint16_t i = 0;
+
+  ASSERT_NO_THROW(i = Utils::toUint16("65535"));
+  ASSERT_EQ((uint16_t)65535, i);
+}
+
+TEST_F(cta_UtilsTest, toUint16_empty_string) {
+  using namespace cta;
+
+  ASSERT_THROW(Utils::toUint16(""), std::exception);
+}
+
+TEST_F(cta_UtilsTest, toUint16_negative) {
+  using namespace cta;
+
+  ASSERT_THROW(Utils::toUint16("-12345"), std::exception);
+}
+
+TEST_F(cta_UtilsTest, toUint16_too_big) {
+  using namespace cta;
+
+  ASSERT_THROW(Utils::toUint16("65536"), std::exception);
+}
+
+TEST_F(cta_UtilsTest, isValidUInt_unsigned_int) {
+  using namespace cta;
+
+  ASSERT_TRUE(Utils::isValidUInt("12345"));
+}
+
+TEST_F(cta_UtilsTest, isValidUInt_empty_string) {
+  using namespace cta;
+
+  ASSERT_FALSE(Utils::isValidUInt(""));
+}
+
+TEST_F(cta_UtilsTest, isValidUInt_signed_int) {
+  using namespace cta;
+
+  ASSERT_FALSE(Utils::isValidUInt("-12345"));
+}
+
+TEST_F(cta_UtilsTest, isValidUInt_not_a_number) {
+  using namespace cta;
+
+  ASSERT_FALSE(Utils::isValidUInt("one"));
+}
+
 } // namespace unitTests

common/exception/CMakeLists.txt

@@ -5,5 +5,4 @@ include_directories(${PROJECT_SOURCE_DIR})
 add_library(CTAException
   Backtrace.cpp
   Errnum.cpp
-  Exception.cpp
-  strerror_r_wrapper.cpp)
+  Exception.cpp)

common/exception/Errnum.cpp

@@ -41,7 +41,7 @@
  *****************************************************************************/
 
 #include "common/exception/Errnum.hpp"
-#include "common/exception/strerror_r_wrapper.h"
+#include "common/strerror_r_wrapper.hpp"
 #include <string.h>
 #include <errno.h>
 

common/exception/strerror_r_wrapper.cpp → common/strerror_r_wrapper.cpp

@@ -15,31 +15,7 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-
-/******************************************************************************
- *
- * This file is part of the Castor project.
- * See http://castor.web.cern.ch/castor
- *
- * Copyright (C) 2003  CERN
- * 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; either version 2
- * of the License, or (at your option) any later version.
- * 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.
- *
- *
- *
- * @author Castor Dev team, castor-dev@cern.ch
- *****************************************************************************/
-
-#include "strerror_r_wrapper.h"
+#include "common/strerror_r_wrapper.hpp"
 
 /*
  * Undefine _GNU_SOURCE and define _XOPEN_SOURCE as being 600 so that the
@@ -53,16 +29,8 @@
 /*******************************************************************************
  * strerror_r_wrapper
  ******************************************************************************/
-extern "C" int strerror_r_wrapper(int errnum, char *buf, size_t buflen) {
+int strerror_r_wrapper(int errnum, char *buf, size_t buflen) {
   /* This function should be compiled using a C++ compiler and not a C compiler.
-   *
-   * C++ compilers are better at spotting whether the GNU version or the
-   * XSI complicant version of sterror_() is being used. This is because the
-   * difference between the two versions is their return types.  The GNU
-   * version returns a 'char *' whereas the XSI compliant version returns an
-   * 'int'.  A C compiler may allow the strerror_r() function to return a
-   * 'char *' and have that 'char *' assigned to an 'int'.  A C++ compiler
-   * usually gives an error if this is tried.
    */
   return strerror_r(errnum, buf, buflen);
 }

common/exception/strerror_r_wrapper.h → common/strerror_r_wrapper.hpp

-/******************************************************************************
+/*
+ * The CERN Tape Archive (CTA) project
+ * Copyright (C) 2015  CERN
  *
- * This file is part of the Castor project.
- * See http://castor.web.cern.ch/castor
+ * 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, either version 3 of the License, or
+ * (at your option) any later version.
  *
- * Copyright (C) 2003  CERN
- * 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; either version 2
- * of the License, or (at your option) any later version.
  * 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.
- *
  *
- *
- * @author Castor Dev team, castor-dev@cern.ch
- *****************************************************************************/
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #pragma once
 
 #include <stddef.h>
 
-/* The following EXTERN_C marco has been intentionally copied from          */
-/* h/osdep.h instead of just including h/osdep.h.  The reason for this is   */
-/* this header file must include the minimum number of header files because */
-/* the implementation file common/strerror_r_wrapper.cpp will undefine      */
-/* _GNU_SOURCE and define _XOPEN_SOURCE as being 600.                       */
-/*                                                                          */
-/* Macros for externalization (UNIX) (J.-D.Durand)                          */
-#if defined(__cplusplus)
-#define EXTERN_C extern "C"
-#else
-#define EXTERN_C extern
-#endif
-
 /**
  * This function wraps the XSI compliant version of strerror_r() and therefore
  * writes the string representation of the specified error number to the
@@ -45,14 +27,6 @@
  *
  * This function should be compiled using a C++ compiler and not a C compiler.
  *
- * C++ compilers are better at spotting whether the GNU version or the
- * XSI complicant version of sterror_() is being used. This is because the
- * difference between the two versions is their return types.  The GNU
- * version returns a 'char *' whereas the XSI compliant version returns an
- * 'int'.  A C compiler may allow the strerror_r() function to return a
- * 'char *' and have that 'char *' assigned to an 'int'.  A C++ compiler
- * usually gives an error if this is tried.
- * 
  * @param errnum The error number.
  * @param buf The buffer.
  * @param buflen The length of the buffer.
@@ -60,5 +34,4 @@
  * to either EINVAL to indicate the error number is invalid, or to ERANGE to
  * indicate the supplied error buffer is not large enough.
  */
-EXTERN_C int strerror_r_wrapper(int errnum, char *buf, size_t buflen);
-
+int strerror_r_wrapper(int errnum, char *buf, size_t buflen);

nameserver/MockNameServer.cpp

@@ -33,7 +33,6 @@
 #include "common/SmartFd.hpp"
 #include "common/Utils.hpp"
 #include "nameserver/MockNameServer.hpp"
-using cta::exception::Exception;
 
 //------------------------------------------------------------------------------
 // assertFsDirExists
@@ -42,17 +41,17 @@ void cta::MockNameServer::assertFsDirExists(const std::string &path) const {
   struct stat stat_result;
 
   if(::stat(path.c_str(), &stat_result)) {
-    char buf[256];
-    std::ostringstream message;
-    message << "assertFsDirExists() - " << path << " stat error. Reason: "
-      << strerror_r(errno, buf, sizeof(buf));
-    throw(Exception(message.str()));
+    const int savedErrno = errno;
+    std::ostringstream msg;
+    msg << __FUNCTION__ << " - " << path << " stat error. Reason: " <<
+      Utils::errnoToString(savedErrno);
+    throw(exception::Exception(msg.str()));
   }
 
   if(!S_ISDIR(stat_result.st_mode)) {
-    std::ostringstream message;
-    message << "assertFsDirExists() - " << path << " is not a directory";
-    throw(Exception(message.str()));
+    std::ostringstream msg;
+    msg << "assertFsDirExists() - " << path << " is not a directory";
+    throw(exception::Exception(msg.str()));
   }
 }
 
@@ -64,9 +63,9 @@ void cta::MockNameServer::assertFsPathDoesNotExist(const std::string &path)
   struct stat stat_result;
 
   if(::stat(path.c_str(), &stat_result) == 0) {
-    std::ostringstream message;
-    message << "assertFsPathExist() - " << path << " exists.";
-    throw(Exception(message.str()));
+    std::ostringstream msg;
+    msg << "assertFsPathExist() - " << path << " exists.";
+    throw(exception::Exception(msg.str()));
   }
 }
 
@@ -119,10 +118,10 @@ void cta::MockNameServer::assertStorageClassIsNotInUse(
   const std::string &path) const {
 
   if(getDirStorageClass(requester, path) == storageClass) {
-    std::ostringstream message;
-    message << "assertStorageClassIsNotInUse() - " << path << " has the " <<
+    std::ostringstream msg;
+    msg << "assertStorageClassIsNotInUse() - " << path << " has the " <<
       storageClass << " storage class.";
-    throw(Exception(message.str()));
+    throw(exception::Exception(msg.str()));
   }
 
   const std::string fsPath = m_fsDir + path;
@@ -130,11 +129,11 @@ void cta::MockNameServer::assertStorageClassIsNotInUse(
   struct dirent *entry;
   DIR *const dp = opendir(fsPath.c_str());
   if (dp == NULL) {
-    char buf[256];
-    std::ostringstream message;
-    message << "assertStorageClassIsNotInUse() - opendir " << fsPath <<
-      " error. Reason: \n" << strerror_r(errno, buf, sizeof(buf));
-    throw(Exception(message.str()));
+    const int savedErrno = errno;
+    std::ostringstream msg;
+    msg << __FUNCTION__ << " - opendir " << fsPath << " error."
+      " Reason: \n" << Utils::errnoToString(savedErrno);
+    throw(exception::Exception(msg.str()));
   }
  
   const bool pathEndsWithASlash = path.at(path.length()-1) == '/';
@@ -161,13 +160,20 @@ void cta::MockNameServer::assertStorageClassIsNotInUse(
 cta::MockNameServer::MockNameServer() {  
   char path[100];
   strncpy(path, "/tmp/CTATmpFsXXXXXX", 100);
-  cta::exception::Errnum::throwOnNull(
+  exception::Errnum::throwOnNull(
     mkdtemp(path),
     "MockNameServer() - Failed to create temporary directory");
   m_fsDir = path;
-  cta::exception::Errnum::throwOnNonZero(
+  exception::Errnum::throwOnNonZero(
     setxattr(m_fsDir.c_str(), "user.CTAStorageClass", "", 0, 0),
-    std::string("MockNameServer() - Failed to setxattr error for ")+m_fsDir);
+    std::string(__FUNCTION__) + " - Failed to setxattr user.CTAStorageClass on "
+      + m_fsDir);
+  exception::Errnum::throwOnNonZero(
+    setxattr(m_fsDir.c_str(), "user.uid", "", 0, 0),
+    std::string(__FUNCTION__) + " - Failed to setxattr user.uid on " + m_fsDir);
+  exception::Errnum::throwOnNonZero(
+    setxattr(m_fsDir.c_str(), "user.gid", "", 0, 0),
+    std::string(__FUNCTION__) + " - Failed to setxattr user.gid on " + m_fsDir);
 }
 
 //------------------------------------------------------------------------------
@@ -188,10 +194,11 @@ void cta::MockNameServer::setDirStorageClass(const SecurityIdentity &requester,
   assertFsDirExists(fsPath);
   
   if(setxattr(fsPath.c_str(), "user.CTAStorageClass", storageClassName.c_str(), storageClassName.length(), 0)) {
-    char buf[256];
-    std::ostringstream message;
-    message << "setDirStorageClass() - " << fsPath << " setxattr error. Reason: " << strerror_r(errno, buf, sizeof(buf));
-    throw(Exception(message.str()));
+    const int savedErrno = errno;
+    std::ostringstream msg;
+    msg << __FUNCTION__ << " - " << fsPath << " setxattr error. Reason: " <<
+      Utils::errnoToString(savedErrno);
+    throw(exception::Exception(msg.str()));
   }
 }  
 
@@ -206,10 +213,11 @@ void cta::MockNameServer::clearDirStorageClass(
   assertFsDirExists(fsPath);
   
   if(setxattr(fsPath.c_str(), "user.CTAStorageClass", "", 0, 0)) {
-    char buf[256];
-    std::ostringstream message;
-    message << "clearDirStorageClass() - " << fsPath << " setxattr error. Reason: " << strerror_r(errno, buf, sizeof(buf));
-    throw(Exception(message.str()));
+    const int savedErrno = errno;
+    std::ostringstream msg;
+    msg << __FUNCTION__ << " - " << fsPath << " setxattr error. Reason: " <<
+      Utils::errnoToString(savedErrno);
+    throw(exception::Exception(msg.str()));
   }
 }  
 
@@ -227,9 +235,9 @@ std::string cta::MockNameServer::getDirStorageClass(
   bzero(value, sizeof(value));
   if(0 > getxattr(fsPath.c_str(), "user.CTAStorageClass", value, sizeof(value))) {
     char buf[256];
-    std::ostringstream message;
-    message << "getDirStorageClass() - " << fsPath << " getxattr error. Reason: " << strerror_r(errno, buf, sizeof(buf));
-    throw(Exception(message.str()));
+    std::ostringstream msg;
+    msg << "getDirStorageClass() - " << fsPath << " getxattr error. Reason: " << strerror_r(errno, buf, sizeof(buf));
+    throw(exception::Exception(msg.str()));