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version 1.44, 2004/08/25 11:15:54

version 1.92, 2012/09/05 11:10:33

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//%2003////////////////////////////////////////////////////////////////////////

//%LICENSE////////////////////////////////////////////////////////////////

// Licensed to The Open Group (TOG) under one or more contributor license

// Company, L. P., IBM Corp., The Open Group, Tivoli Systems.

// agreements. Refer to the OpenPegasusNOTICE.txt file distributed with

// this work for additional information regarding copyright ownership.

// IBM Corp.; EMC Corporation, The Open Group.

// Each contributor licenses this file to you under the OpenPegasus Open

// Source License; you may not use this file except in compliance with the

// License.

// Permission is hereby granted, free of charge, to any person obtaining a copy

// Permission is hereby granted, free of charge, to any person obtaining a

// of this software and associated documentation files (the "Software"), to

// copy of this software and associated documentation files (the "Software"),

// deal in the Software without restriction, including without limitation the

// to deal in the Software without restriction, including without limitation

// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or

// the rights to use, copy, modify, merge, publish, distribute, sublicense,

// sell copies of the Software, and to permit persons to whom the Software is

// and/or sell copies of the Software, and to permit persons to whom the

// furnished to do so, subject to the following conditions:

// Software is furnished to do so, subject to the following conditions:

// THE ABOVE COPYRIGHT NOTICE AND THIS PERMISSION NOTICE SHALL BE INCLUDED IN

// The above copyright notice and this permission notice shall be included

// ALL COPIES OR SUBSTANTIAL PORTIONS OF THE SOFTWARE. THE SOFTWARE IS PROVIDED

// in all copies or substantial portions of the Software.

// "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT

// LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR

// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT

// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN

// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION

// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

//==============================================================================

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY

// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,

// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE

// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

// Author: Mike Brasher (mbrasher@bmc.com)

//////////////////////////////////////////////////////////////////////////

// Modified By:

// Nag Boranna, Hewlett-Packard Company (nagaraja_boranna@hp.com)

// Modified By: Dave Rosckes (rosckes@us.ibm.com)

// Robert Kieninger, IBM (kieningr@de.ibm.com) for Bug#667

//%/////////////////////////////////////////////////////////////////////////////

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#include <Pegasus/Common/Config.h>

#include <Pegasus/Common/String.h>

#include <Pegasus/Common/Array.h>

#include <Pegasus/Common/Linkage.h>

#include <Pegasus/Common/Logger.h>

#include <Pegasus/Common/Network.h>

#include <Pegasus/Common/Mutex.h>

#include <sys/stat.h>

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#ifndef mode_t

typedef unsigned long mode_t;

#endif

#include <windows.h>

#endif

#if defined (PEGASUS_OS_TYPE_UNIX) || \

defined (PEGASUS_OS_VMS)

# include <unistd.h>

# include <fcntl.h> // File locking

# define PEGASUS_UID_T uid_t

# define PEGASUS_GID_T gid_t

#else

# define PEGASUS_UID_T Uint32

# define PEGASUS_GID_T Uint32

#endif

#if defined(PEGASUS_OS_TYPE_WINDOWS)

# define PEGASUS_SYSTEM_ERRORMSG_NLS \

System::getErrorMSG_NLS(GetLastError(),0)

# define PEGASUS_SYSTEM_NETWORK_ERRORMSG_NLS \

System::getErrorMSG_NLS(WSAGetLastError(),0)

# define PEGASUS_SYSTEM_ERRORMSG \

System::getErrorMSG(GetLastError(),0)

# define PEGASUS_SYSTEM_NETWORK_ERRORMSG \

System::getErrorMSG(WSAGetLastError(),0)

#elif defined(PEGASUS_OS_ZOS)

# define PEGASUS_SYSTEM_ERRORMSG_NLS \

System::getErrorMSG_NLS(errno,__errno2())

# define PEGASUS_SYSTEM_NETWORK_ERRORMSG_NLS \

System::getErrorMSG_NLS(errno,__errno2())

# define PEGASUS_SYSTEM_ERRORMSG \

System::getErrorMSG(errno,__errno2())

# define PEGASUS_SYSTEM_NETWORK_ERRORMSG \

System::getErrorMSG(errno,__errno2())

#else

# define PEGASUS_SYSTEM_ERRORMSG_NLS \

System::getErrorMSG_NLS(errno,0)

# define PEGASUS_SYSTEM_NETWORK_ERRORMSG_NLS \

System::getErrorMSG_NLS(errno,0)

# define PEGASUS_SYSTEM_ERRORMSG \

System::getErrorMSG(errno,0)

# define PEGASUS_SYSTEM_NETWORK_ERRORMSG \

System::getErrorMSG(errno,0)

#endif

// Protocal Type

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PEGASUS_NAMESPACE_BEGIN

/** This is an opaque type which is used to represent dynamic library

handles returned by the System::loadDynamicLibrary() method and

accepted by the System::loadDynamicProcedure() method.

typedef struct DynamicLibraryHandle_* DynamicLibraryHandle;

/** This is an opaque type which is returned by System::loadDynamicSymbol().

Values of this type may be casted to the appropriate target type.

#if !defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) && !defined(PEGASUS_PLATFORM_OS400_ISERIES_IBM) && !defined(PEGASUS_PLATFORM_AIX_RS_IBMCXX)

typedef struct DynamicSymbolHandle_* DynamicSymbolHandle;

#else

extern "C" {typedef int (* DynamicSymbolHandle)(void);}

#endif

/** The System class defines wrappers for operating system related calls.

These are only placed here if they are extremely light. These are

usually just direct wrappers which map more or less one to one to the

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class PEGASUS_COMMON_LINKAGE System

{

public:

/* Creates a String object containing the system message

from the errno and if supported from a second level error

number. The _NLS Method is looking up an internationalized version of

the message.

@param errorCode The system errno.

@param errorCode2 The secondary error number like errno2 on z/OS

static String getErrorMSG_NLS(int errorCode,int errorCode2);

static String getErrorMSG(int errorCode,int errorCode2);

/** getCurrentTime - Gets the current time as seconds and milliseconds

into the provided variables using system functions.

@param seconds Return for the seconds component of the time.

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static void getCurrentTime(Uint32& seconds, Uint32& milliseconds);

/** Similar to getCurrentTime() above but get microseconds (rather than

milliseconds).

static void getCurrentTimeUsec(Uint32& seconds, Uint32& microseconds);

/** Similar to getCurrentTime() above but get the full time in microseconds

static Uint64 getCurrentTimeUsec();

/** getCurrentASCIITime Gets time/date in a fixed format. The format is

YY MM DD-HH:MM:SS

@return Returns String with the ASCII time date.

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static Boolean removeFile(const char* path);

/**

Renames a file. If the new name refers to an existing file, it is

removed and replaced with the renamed file. The rename operation is

performed atomically.

@param oldPath A character string containing the name of the file to

rename.

@param newPath A character string containing the name to which to

rename the file.

@return A Boolean indicating whether the rename operation was

successful.

static Boolean renameFile(const char* oldPath, const char* newPath);

static Boolean copyFile(const char* fromPath, const char* toPath);

/** Unix issue:<br><br><b>RTLD_<bah></b> issue. Currently Pegasus uses RTLD_NOW during

loading of the library if supported by OS. Previous to 2.2, Pegasus used RTLD_GLOBAL on Linux

- that behaviour is now deprecated.

static DynamicLibraryHandle loadDynamicLibrary(const char* fileName);

static void unloadDynamicLibrary(DynamicLibraryHandle libraryHandle);

static String dynamicLoadError(void);

static DynamicSymbolHandle loadDynamicSymbol(

DynamicLibraryHandle libraryHandle,

const char* symbolName);

static String getHostName();

static String getFullyQualifiedHostName ();

static String getSystemCreationClassName ();

static Uint32 _acquireIP(const char* hostname);

// The following 2 methods are wrappers around system functions

// gethostbyname/gethostbyaddr or gethostbyname_r/gethostbyaddr_r.

// In addition to calling corresponding system functions, these

// methods introduce re-tries when errno is set to TRY_AGAIN.

// Optional parameters are required to cover systems which use '_r'

// versions of the system functions.

static struct hostent* getHostByName(

const char* name,

struct hostent* he = 0,

char* buf = 0,

size_t len = 0);

static struct hostent* getHostByAddr(

const char *addr,

int len,

int type,

struct hostent* he = 0,

char* buf = 0,

size_t buflen = 0);

// The following 2 methods are wrappers around system functions

// getaddrinfo/getnameinfo.

// In addition to calling corresponding system functions, these

// methods introduce re-tries on EAI_AGAIN error returns.

// Callers are expected to call freeaddrinfo when using System::getAddrInfo

static int getAddrInfo(

const char *hostname,

const char *servname,

const struct addrinfo *hints,

struct addrinfo **res);

static int getNameInfo(

const struct sockaddr *sa,

size_t salen,

char *host,

size_t hostlen,

char *serv,

size_t servlen,

int flags);

// Gets IP address assosiated with hostName. af indicates the

// type of address (ipv4 or ipv6) returned.

static Boolean getHostIP(const String &hostName, int *af, String &hostIP);

// Gets IP address in binary form. af indicates the type of

// address (ipv4 or ipv6) returned. Address will be copied to dst.

static Boolean acquireIP(const char* hostname, int *af, void *dst);

/**

Returns true if IPv6 stack is active by checking return code from

Socket::createSocket() and getSocketError() calls.

ATTN: We return true if some error other than

PEGASUS_INVALID_ADDRESS_FAMILY is returned while creating the socket

because we will not be sure whether the IPv6 stack is active or not

from the returned error code. Return value of "true" from this method

should not be trusted absolutely.

#ifdef PEGASUS_ENABLE_IPV6

static Boolean isIPv6StackActive();

#endif

/**

Returns all interface addresses. Both ip4 and ip6 interface addresses

will be returned.

static Array<String> getInterfaceAddrs();

static Uint32 lookupPort(

const char * serviceName,

Uint32 defaultPort);

/**

Attempts to find the given IP address(32bit) on any of the local defined

network interfaces

static Boolean isIpOnNetworkInterface(Uint32 inIP);

/**

Attempts to resolve a given hostname

this function possibly can take some as it can request information

from the DNS

@param resolvedNameIP On successful hostname resolution, this output

parameter contains the IP address that was determined.

@return true if successful, false if not successful.

static Boolean resolveHostNameAtDNS(

const char* hostname,

Uint32* resolvedNameIP);

/**

Attempts to resolve a given IP address

this function possibly can take some as it can request information

from the DNS

@param resolvedIP On successful hostname resolution, this output

parameter contains the IP address that was determined.

@return true if successful, false if not successful.

static Boolean resolveIPAtDNS(Uint32 ip_addr, Uint32 * resolvedIP);

/**

Bundling function used to determine if a given hostname or IP address

belongs to the local host

this function has the potential to take some time as it will possibly

use the DNS

static Boolean isLocalHost(const String& hostName);

/**

Checks binIPAddress represented by address family and returns true

if binary representation matches with loopback ip address. binIPAddress

must be in host-byte order.

static Boolean isLoopBack(int af, void *binIPAddress);

static String getEffectiveUserName();

/**

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/**

This function is used to encrypt the user's password.

The encryption is compatible with Apache's password file (generated using

The encryption is compatible with Apache's password file (generated

the htpasswd command )

using the htpasswd command)

@param password Password to be encrypted.

@param salt Two character string chosen from the set [a-zA-Z0-9./].

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@param userName User name to be checked.

@return true if the user is a privileged user, else false

static Boolean isPrivilegedUser(const String userName);

static Boolean isPrivilegedUser(const String& userName);

/**

This function returns the privileged user name on the system.

@return the privileged user name

static String getPrivilegedUserName();

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of the specified user group.

@param userName User name to be verified.

@param groupName User group name.

@return true if the user is a member of the user group,

@return true if the user is a member of the user group, false otherwise.

false otherwise.

@throw InternalSystemError - If there is an error accessing the

specified user or group information.

@throw InternalSystemError - If there is an error

accessing the specified user or group information.

static Boolean isGroupMember(const char* userName, const char* groupName);

/**

This function is used to get the process ID of the calling process.

Gets the user and group IDs associated with the specified user.

@param userName User name for which to look up user and group IDs.

@param uid User ID for the specified user name.

@param gid Group ID for the specified user name.

@return True if the user and group IDs were retrieved

successfully, false otherwise.

static Boolean lookupUserId(

const char* userName,

PEGASUS_UID_T& uid,

PEGASUS_GID_T& gid);

/**

Changes the process user context to the specified user and group.

IMPORTANT: This method is not reentrant and not async signal safe.

It should only be called in a single-threaded program.

@param userName User name to set as the process user context.

@param uid User ID to set as the process user context.

@param gid Group ID to set as the process group context.

@return True if the user context is successfully changed,

false otherwise.

static Boolean changeUserContext_SingleThreaded(

const char* userName,

const PEGASUS_UID_T& uid,

const PEGASUS_GID_T& gid);

/**

This function is used to get the process ID of the calling process.

@return Process ID

static Uint32 getPID();

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static Boolean truncateFile(const char* path, size_t newSize);

/** Compare two strings but ignore any case differences.

This method is provided only because some platforms lack a strcasecmp

This method is provided only because some platforms lack a fast enough

function in the standard library.

strcasecmp function in the standard library.

static Sint32 strcasecmp(const char* s1, const char* s2);

/** Compare two strings for equality but ignore any case differences.

This method should only be used if length of both strings is

known already. If not, please use System::strcasecmp()

static bool strncasecmp(

const char* s1,

size_t s1_l,

const char* s2,

size_t s2_l);

/** Return just the file or directory name from the path into basename.

This method returns a file or directory name at the end of a path.

The path can be relative or absolute. If the path is the root,

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static Boolean changeFilePermissions(const char* path, mode_t mode);

/** Checks whether the specified file is a regular file owned by the

effective user for the current process.

@param path Path of the file to check.

@return True if the file is owned by the effective user for the

current process, false otherwise.

static Boolean verifyFileOwnership(const char* path);

/**

Flag indicating whether shared libraries are loaded with the

BIND_VERBOSE option.

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static Boolean bindVerbose;

/** This function is an abstraction for the openlog interface used in the Logger

/**

class. Each platform intending to use system logs should support this interface

Writes a message to the system log. This method encapsulates the

semantics of opening the system log, writing the specified message,

static void openlog(const String);

and closing the log.

/** This function is an abstraction for the syslog interface used in the Logger

@param ident An identifier to be prepended to the log messages

class. Each platform intending to use system logs should support this interface

(typically a program name).

@param severity A severity value to be associated with the message.

static void syslog(Uint32, const char *);

Severity values are defined in Logger.h.

@param message A message to be written to the system log.

static void syslog(

const String& ident,

Uint32 severity,

const char* message);

static void openlog(

const char *ident,

int logopt,

int facility);

/** This function is an abstraction for the closelog interface used in the Logger

class. Each platform intending to use system logs should support this interface

static void closelog();

/** Function to set hostname and thus override system supplied value */

static void setHostName(const String & hostName);

/** Function to set fully qualified hostname and thus override system

supplied value */

static void setFullyQualifiedHostName(const String & fullHostName);

// System ID constants for Logger::put and Logger::trace

static const String CIMSERVER;

// System ID constants for Logger::put and Logger::trace

static const String CIMLISTENER;

// mutex used for synchronising threads calling getHostName.

static Mutex _mutexForGetHostName;

// mutex used for synchronising threads calling getFullyQualifiedHostName

static Mutex _mutexForGetFQHN;

private:

// Strings caching hostnames to avoid repeated resolver lookups and to

// enable setting by configuration

static String _hostname;

static String _fullyQualifiedHostname;

};

/**

The AutoFileLock class uses an advisory file lock to allow access to a

resource to be controlled.

class PEGASUS_COMMON_LINKAGE AutoFileLock

{

public:

AutoFileLock(const char* fileName);

~AutoFileLock();

private:

AutoFileLock();

AutoFileLock(const AutoFileLock&);

AutoFileLock& operator=(const AutoFileLock&);

#ifdef PEGASUS_OS_TYPE_UNIX

struct flock _fl;

int _fd;

#endif

#ifdef PEGASUS_OS_TYPE_WINDOWS

HANDLE _hFile;

#endif

};

PEGASUS_NAMESPACE_END

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