资源说明:Clone of sfcb from sblim.sf.net with SUSE specific patches/additions
--------------------------------- SMALL-FOOTPRINT CIM BROKER (sfcb) --------------------------------- 1. What is sfcb =============== sfcb is a lightweight CIM daemon (aka CIMOM) that responds to CIM client requests for system management data and/or performs system management tasks. sfcb supports most of the standard CIM XML over http/https protocol. It is highly modular, allowing functionality to be easily added, removed or customized for different management applications. sfcb is specifically targeted for small embedded system that do not have the available CPU, memory or disk resources to support a full-blown enterprise-level CIMOM. That said, sfcb runs very well on a regular Linux/Unix system and supports most of the functions required by CIM clients to manage such the system. Supported CIM operations include: GetClass ModifyClass CreateClass DeleteClass EnumerateClasses EnumerateClassNames GetInstance DeleteInstance CreateInstance ModifyInstance EnumerateInstances EnumerateInstanceNames InvokeMethod (MethodCall) ExecQuery Associators AssociatorNames References ReferenceNames GetQualifier SetQualifer DeleteQualifier EnumerateQualifiers GetProperty SetProperty CIM process and lifecycle indications (aka 'events') are also supported. sfcb supports HTTP 'chunking' for enumeration output. This allows large volumes of data to be send back to the CIM client in 'chunks' as they are generated, rather than waiting until all the results are available and then sending back as one huge HTTP response. This feature obviously requires chunking support by the CIM client. To minimize runtime resource consumption, sfcb allows providers for multiple CIM classes to be grouped and run under a single process, as well as the automatic loading and unloading of idle providers according to user-configurable parameters. sfcb includes a default static instance repository provider that allows the reading and writing of raw instance data for classes without their own explicit CIM provider. This code is not yet extensively tested. sfcb is part of the Standards Based Linux Instrumentation for Manageability (SBLIM) Project hosted by SourceForge. The project home page can be found at: http://sblim.sourceforge.net/ Please go the the SBLIM Project home page for more information about sfcb and/or SBLIM, including design and architecture documents, sample providers, test files, CIM client programs, etc. What isn't sfcb =============== Currently sfcb does not support some of the CIM class operations, specifically adding and removing new CIM classes dynamically. Instead, classes are added/removed/modified offline and require restarting the sfcb daemon for the changes to take effect. However, there is nothing inherent in the design of sfcb preventing more sophisticated class module from being implemented, although probably at the expense of a larger footprint. sfcb only supports the Open Group standard CMPI provider interface. Several CMPI providers covering commonly needed system management resources are available from the SBLIM Project. sfcb does not implement any sophisticated client authorization support at this time. Instead, this functionality can be added via writing specical purpose external SBLIM providers. There is a sample authorization SBLIM provider available from the SBLIM Project home page. sfcb does include support for basic authentication (which requires writing a custom authentication library) and authentication based on client certificates which can be combined with basic authentication. See 21. for details. 2. Pre-requisites ================= sfcb can either be built from a tarball downloaded from the SBLIM download area or by extracting the sources from the CVS repository. When building sfcb from a tarball, the only requisite is that curl-devel is installed (see below). In fact even this can be avoided if the package is configured with indication disabled. Building sfcb from sources extracted from CVS requires that the following packages are already installed on your Linux/Unix system: automake >= 1.8 autoconf >= 2.5.8 libtool >= 1.5.8 bison >= 1.85 curl >= 7.11.1-1 curl-devel >= 7.11.1-1 flex If you want to enable SSL support, the following packages are needed as well: openssl > 0.9.7 openssl-devel > 0.9.7 To check if a package is installed and to determine its version type rpm -qIf you want to enable SLP support, the following packages are needed as well: openslp (available from http://www.openslp.org) sfcc (available from our sblim cvs) Make sure all the required packages are installed prior to attempting to build sfcb or any of the supporting packages. You may need to install a more recent version than what is on your system. Missing or outdated packages will result in a variety of build problems. 3. Quick Install Instructions ============================= Note: the quick install supports you in setting up an environment including providers and additional support programs. If you are interested only in sfcb refer to the instructions in section 5. The sfcb package includes an install script to download (via CVS), build and install sfcb and all its supporting packages. To download the sfcb package and run the install script: cvs -z3 -d:pserver:anonymous:@sblim.cvs.sourceforge.net/cvsroot/sblim co -P sfcb cd sfcb ./installsfcb.sh You will be prompted for various install options, as well as the root password when it is needed for system operations that require root access. Most of the time the default options should work. By default sfcb will download its source files and supporting packages to $PWD/sfcb/ in the current working directory and install itself under /usr/local/ 4. Change History ================= See NEWS file of the sfcb package 5. Downloading sfcb and mofc Source =================================== Option 1: -------- You can download and extract the tarball containing both sfcb and mofc ready to build: http://sourceforge.net/projects/sblim/ and click on the sblim-sfcb package to download. Then unpack: tar jxf sblim-sfcb-x.y.z.tar.bz2 You are now ready to build sfcb and mofc (see Section 6 below). Option 2: -------- To download the latest (unsupported) version of sfcb from CVS source: cvs -z3 -d:pserver:anonymous:@sblim.cvs.sourceforge.net/cvsroot/sblim co -P sfcb You must also download the required mofc (MOF compiler) package INTO the sfcb source directory: cd sfcb cvs -z3 -d:pserver:anonymous:@sblim.cvs.sourceforge.net/cvsroot/sblim co -P mofc Then run autoconfiscate to setup the autoconf files. From the sfcb directory: ./autoconfiscate.sh You are now ready to build sfcb and mofc (see Section 6 below). 6. Building sfcb and mofc ========================= sfcb and its supporting packages have been 'autoconfiscated' to simplify building and installing them on different Linux/Unix systems. In most cases the autoconf scripts will determine the correct build/compile options for your system. After downloading the sfcb and mofc, either from CVS or tarball, build the packages by: ./configure make And as root: make install make postinstall NOTE: By default, sfcb is installed with a prefix of /usr/local, which is acceptable for local installation. If sfcb is installed via RPM, the files will be in the "standard" locations, so that any occurence of a file name starting with /usr/local must be replaced according to the rules below: /usr/local/etc/* -> /etc/* /usr/local/var/* -> /var/* /usr/local/* -> /usr/* 7. Trimming sfcb and mofc binary ================================ If you wish to reduce the footprint of sfcb and it supporting libraries to a bare minimum then run the following commands after building and installing sfcb and mofc strip /usr/local/sbin/sfcbd strip /usr/local/lib/libsfc*.so.0.* strip /usr/local/bin/sfcbmof It is recommended that you do this after you have confirmed that sfcb is installed and working correctly because stripping the binaries will remove useful debugging information should problems arise. However, stripping the binaries and libs will significantly reduce their size. You can use the footprinting utility to evaluate the resource usage of sfcb. First you must download the ps_mem.py utility from http://www.pixelbeat.org/scripts/ps_mem.py Place that script anywhere in your path, or in the sfcb CVS directory, and ensure that it is executable. Then build and start sfcb as described in sections 6 and 10 Lastly, run the footprint utility as root: make footprint The resulting report will describe the resource usage. You may then try different build options and rerun the utility to evaluate their affect. The README.sfcb-shrink file gives some guidance and tips for further reducing the footprint. 8. Build Options ================ There are several build options you can set to customize building sfcb, such as what optional support to include or remove for a smaller footprint. These options are set on the ./configure command line; e.g. ./configure --enable-ssl Options: --disable-debug=[yes|no] Disable debug/trace message logging. Default=no --enable-ssl=[yes|no] Enable HTTPS (ie HTTP+SSL) support. Default=no --enable-jdbc=[yes|no] Enable server-side JDBC support (experimental). Default=no --disable-indications=[yes|no] Disable indication support. Default=no (ie enable indications) --enable-slp=[yes|no|standalone] Enable slp support. Default=no --disable-qualifierrep=[yes|no] Disable support for qualifier operations (Get-,Set-,Delete-, EnumerateQualifiers). Default=no --disable-default-properties=[yes|no] Disable generation of default instance properties for SFCB. Default=no --enable-optimized-enumeration=[yes|no] Enable enumeration call optimization for polymorphic invocations. This option can result in less provider invocations but may break providers expecting to be called for leaf classes only (and then multiple times). Default=no --enable-pam=[yes|no] Enable building a basic authentication module based on PAM. Default=no --enable-ipv6=[yes|no] Enable IPv6 address support. This does not disable connections on IPv4 addresses. Default=no --enable-local-connect-only SFCB will only support local connection. Http server will not be built. Default=no --enable-tests[=TESTS] Enables the test suite with the listed tests. If no tests are listed, all tests are enabled. Valid tests are "commands,unit,xml,wbemcli,gcov,slp,providers" Default=no --enable-uds Enables UDS authentication for the http server. Default=no This option may require the GNU_SOURCE compiler flag if building under glibc 2.8+. (CFLAGS=-D_GNU_SOURCE ./configure) 9. Downloading the CIM Schema ============================= When building sfcb and mofc, running the 'make postinstall' step will download and install the standardized DMTF CIM Schema from www.dmtf.org. The CIM Schema contains all the class definitions for the CIM object hierarchy used by sfcb. Without the base CIM Schema sfcb will be unable to register providers and their implemented classes. The CIM Schema can be re-installed at any time by running su -c 'make install-cimschema' or equivalently /usr/local/share/sfcb/getSchema.sh -f This script uses curl to download the schema. Should this script fail for any reason please go to 'http://www.dmtf.org/standards/cim' and manually download the latest CIM Schema tarball and extract the schema fileset to /usr/local/share/sfcb/CIM/. Again, there are a few possibilities to influence the way the schema is installed. The following variables can be passed to the configure command: CIMSCHEMA_SOURCE URL or path name of CIM Schema Zipfile CIMSCHEMA_MOF File name of the top level MOF file CIMSCHEMA_SUBDIRS If specified, the ZIP file subdirectory structure is preserved. If CIMSCHEMA_SOURCE points to a local file, curl is not required. Alternatevily, these environment variables may be set before invoking getSchema.sh. 10. Starting and Stopping sfcb ============================== sfcb installs an init.d style script under /usr/local/etc/init.d/ to allow you to start, stop and restart the sfcb daemon. To start up sfcb you must first become root and then type /usr/local/etc/init.d/sfcb start To stop sfcb you must first become root and then type /usr/local/etc/init.d/sfcb stop Alternatively you can manually start the sfcd daemon as root by /usr/local/sbin/sfcbd to run it in the foreground. After starting sfcbd in this way you should see something like # /usr/local/sbin/sfcbd --- sfcbd V0.9.0 started - 31805 --- Using /usr/local/etc/sfcb/sfcb.cfg --- SSL not configured --- User authentication disabled --- Max provider procs: 32 --- initSocketPairs: 80 --- Max Http procs: 8 --- sfcbd HTTP Daemon V0.9.0 started - 31806 - port 5988 --- Keep-alive timeout disabled --- ClassProvider for /usr/local/var/lib/sfcb/registration/repository/root/cimv2 (no-version) using 481237 bytes --- ClassProvider for /usr/local/var/lib/sfcb/registration/repository/root/interop (no-version) using 49507 bytes with three running processes associated with sfcb. e.g. # ps -ef ... root 31805 31392 0 20:54 pts/3 00:00:00 /usr/local/sbin/sfcbd root 31806 31805 0 20:54 pts/3 00:00:00 /usr/local/sbin/sfcbd root 31807 31805 0 20:54 pts/3 00:00:00 /usr/local/sbin/sfcbd which correspond to the main sfcbd process itself (pid 31805), the HTTP codec (pid 31806) and the class provider (pid 31807). Hit CTRL-C at any time to stop sfcb and all its associated processes. In rare cases sfcb might hang and/or not shutdown cleanly. Please report this as a bug and include how to reproduce the problem. Should this ever happen you can 'kill' sfcbd and all associated processes by killall -9 sfcbd This should be done as a last resort - always try a clean shutdown first. To stop and restart sfcbd type /usr/local/etc/init.d/sfcb restart 11. Command Line Options ======================== sfcb has a few commandline options that enable/disable particular runtime features. They are sfcbd [-t N|?] [-d] [-v] [-h] [-k] [-s] [-c FILE] [-l LOGLEVEL] where -t, --trace-components Activate component-level tracing messages, where N is a OR-ed bitmask integer defining which component to trace. Specifying "-t ?" which list all the components and their associated integer bitmask. They are providerMgr 1 (0x00001) providerDrv 2 (0x00002) cimxmlProc 4 (0x00004) httpDaemon 8 (0x00008) upCalls 16 (0x00010) encCalls 32 (0x00020) ProviderInstMgr 64 (0x00040) providerAssocMgr 128 (0x00080) providers 256 (0x00100) indProvider 512 (0x00200) internalProvider 1024 (0x00400) objectImpl 2048 (0x00800) xmlIn 4096 (0x01000) xmlOut 8192 (0x02000) sockets 16384 (0x04000) memoryMgr 32768 (0x08000) msgQueue 65536 (0x10000) xmlParsing 131072 (0x20000) responseTiming 262144 (0x40000) A useful one to try that reveals the internal workings of sfcbd when processing a CIM request (but also does not generate too many messages) is "-tm 2019". -d, --daemon Run sfcbd (and child processes) in the background. -v, --version Prints version information and exits. -h, --help Displays usage infomration and exits. -k, --color-trace Prints trace output in a different color per process for easier debugging. Not recommended when redirecting output to a file. -s, --collect-stats Turn on runtime statistics collecting. If enabled then various sfcbd runtime statistics will be written to ./sfcbStat Default is no statistics are collected. -c, --config-file= Specify an alternative configuration file (see Section 12). Default=/usr/local/etc/sfcb/sfcb.cfg -l, --syslog-level= specify the level for syslog. LOGLEVEL can be LOG_INFO, LOG_DEBUG, or LOG_ERR. LOG_ERR is the default 12. Runtime Configuration Options ================================= After starting up, sfcb will read runtime configuration options from the file /usr/local/etc/sfcb/sfcb.cfg. For example: httpPort: 5988 enableHttp: true httpProcs: 8 httpsPort: 5989 enableHttps: false httpsProcs: 8 provProcs: 32 maxMsgLen: 10000000 doBasicAuth: false basicAuthLib: sfcBasicAuthentication useChunking: true keepaliveTimeout: 0 keepaliveMaxRequest: 10 sslKeyFilePath: /usr/local/etc/sfcb/file.pem sslCertificateFilePath: /usr/local/etc/sfcb/server.pem registrationDir: /usr/local/var/lib/sfcb/registration providerDirs: /usr/local/lib/sfcb /usr/local/lib /usr/local/lib/cmpi Config Option Descriptions -------------------------- httpPort Local port that sfcbd should listen to receive HTTP (i.e. insecure) requests from CIM clients. Default=5988 enableHttp sfcb should/not accept HTTP client connections. Default=true. httpProcs Maximum number of simultaneous HTTP client connections before blocking new incoming HTTP requests. Default=8 httpsPort Local port that sfcbd should listen to receive HTTPS (i.e. secure) requests from CIM clients. Default=5989 enableHttps sfcb should/not accept HTTPS client connections. Default=false. httpLocalOnly sfcb should only allow HTTP connections from local interface (127.0.0.1 or ::1). Default=false httpsProcs Maximum number of simultaneous HTTPS client connections before blocking new incoming HTTPS requests. Default=8 provProcs Maximum number of simultaneous provider processes. After this point if a new incoming request requires loading a new provider, then one of the existing providers will first be automatically unloaded. Default=32 maxMsgLen Maximum size in bytes of received messages. Messages larger than this size will be rejected. Default=10000000 doBasicAuth Perform basic authentication on the client userid (obtained from the HTTP/HTTPS header) before allowing the request. Default=false (i.e. no client authentication performed). basicAuthLib Name of the local library to call to authenticate the client userid. Default=/usr/local/lib/libsfcBasicAuthentication.la useChunking Tell sfcbd to use HTTP/HTTPS 'chunking' to return large volumes of response data to the client in 'chunks', rather than buffering the data and sending it back all at once. slpRefreshInterval timeinterval in seconds in which the slp process refreshes information keepaliveTimeout Specify the maximum time in seconds an sfcb HTTP process will wait between two requests on one connection before terminating. Setting it to 0 will disable HTTP keep-alive. Default=15 keepaliveMaxRequest Specify the maximum number of consecutive request on one connection. Setting it to 0 will effectively disable HTTP keep-alive. Default=10 sslKeyFilePath Specify the name of the file containing the private key for the server's certificate. The file must be in PEM format and may not be passphrase-protected. This file is only required if enableHttps is set to true. Default=/usr/local/etc/sfcb/file.pem sslCertificateFilePath Specify the name of the file containing the server's certificate. The file must be in PEM format. This file is only required if enableHttps is set to true. Default=/usr/local/etc/sfcb/server.pem registrationDir Specify the registration directory, which contains the provider registration data, the staging area and the static repository. Default=/usr/local/var/lib/sfcb/registration providerDirs A space separated list of directories where sfcb is looking for provider libraries. Default=/usr/local/lib /usr/local/lib/cmpi providerSampleInterval The interval in seconds at which the provider manager is checking for idle providers. Default: 30 providerTimeoutInterval The interval in seconds before an idle provider gets unloaded by the provider manager. Default: 60 providerAutoGroup If set to true, all providers residing in the same shared library will be executed in the same process unless another group has been specified in the provider registration file. Default: true slpHostnameLib Specify the name of the library to use to determine the SLP hostname. This will override the default method. You must implement this library based on the sample provided, sfcSlpHostname.c. You must also specify the --enable-slp-hostname-lib configure option to enable this support. sslClientCertificate Specify the way sfcb handles client certificate based authentication. If set to ignore it will not request a certificate from the client. If set to accept it will request a certificate from the client but not fail if the client doesn't present one. If set to require it will refuse the client connection if the client doesn't present a certificate. Default=ignore certificateAuthLib Name of the local library to call for client-certificate based user authentication. Called only if sslClientCertificate is not set to ignore. Default=sfcCertificateAuthentication traceLevel Specify the trace level for sfcb. Can be overriden by setting environment variable SFCB_TRACE_LEVEL. Default: 0. traceMask Specify the trace mask for sfcb. Overrides the command line option --trace-components. Default: 0. traceFile Specify the trace file for sfcb. Can be overriden by setting environment variable SFCB_TRACE_FILE. Default: stderr. After making any changes to sfcb.cfg you must restart sfcb or get it to reload the config file by typing /usr/local/etc/init.d/sfcb reload or equivalently killall sfcbd -HUP 13. Environment Variables ========================= In addition to the sfcbd command line options and configuration file, several environment variables can also be set which directly or indirectly affect the runtime behavior of sfcb. Environment variables affecting sfcb and/or its SBLIM providers include: PATH=/usr/local/bin:/usr/local/sbin Path to the sfcbd daemon and utilities. LD_LIBRARY_PATH=/usr/local/lib/sfcb Path to the sfcb runtime libraries. Note: the path to the SBLIM provider libraries is specified in the sfcb configuration file and therefore does not need to be on the global LD_LIBRARY_PATH. However, some of the utilities re-use sfcbd libraries, hence this needs to be added to LD_LIBRARY_PATH for the utilities to work. Alternatively, you can add this path to the system-wide dynamic linker/loader config file /etc/ld.so.conf SFCB_PAUSE_PROVIDER Specifies the name of the SBLIM provider to pause after first being loaded to facilitate attaching a runtime debugger to the provider's process for debugging purposes. See Section 23 below for more details on debugging providers. SFCB_PAUSE_CODEC Specifies the name of the sfcb codec (currently only "http") to pause after first being started to facilitate attaching a runtime debugger to the process. See Section 16 below for more details on debugging sfcb. SFCB_PAUSE_HTTP (duplicate of SFCB_PAUSE_CODEC=http? remove?) SFCB_TRACE=[0..4] Specifies the level of trace/debug messages for sfcb. Valid values are 0 (no trace messages), or 1 (key trace messages only) to 4 (all messages). If not set, a default trace level of 1 will be assumed for tracing. Note: SFCB_TRACE level is used in conjunction with sfcb's component-level tracing (see Section 11) to control the level of detail of trace messages to display within each component. SFCB_TRACE_FILE=/path/to/file By default sfcb trace messages are written to STDERR. Setting this envorinment variable causes the trace messages to be written to a file instead. SFCB_TRAP If set this environment variable enables trap interrupts on x86 platforms to be generated by sfcb in special situations. [Note: not currently ever used] SBLIM_TRACE=[0..4] Specifies the level of trace/debug messages for SBLIM providers. Valid values are 0 (no trace messages), or 1 (key trace messages only) to 4 (all messages). Note: this only applies to SBLIM providers written with explicit trace messages in their source code. 14. Installing CMPI Providers ============================= As mentioned, sfcb supports CMPI providers. In order to install a CMPI provider for sfcb, it is necessary to make sure that the provider shared library is copied into one of the directories specified by the providerDirs config option and that the provider is properly registered using the sfcbstage and sfcbrepos commands as described in 17. and 18. Ideally the provider package is enabled for sfcb, so that a make install and/or make postinstall will care for the proper registration. For instance most of the SBLIM providers are prepared for sfcb. See 22. below. 15. Testing sfcb with wbemcat and xmltest ========================================= sfcb includes two utility programs (actually scripts) that are useful for running tests against sfcb and its providers, called wbemcat and xmltest. wbemcat is a utility that will send raw CIM-XML data via the http protocol to the sfcb CIMOM (or any CIMOM for that matter) listening on the well-known port 5988 on the specified host (by default localhost), and display the returned results. The sfcb package include a ./test subdirectory contain some simple CIM client commands written in CIM-XML. These CIM requests can be sent to sfcb using the wbemcat utility to display the results. eg # ls -1 test/*.xml test/enumerateclasses.ALL.xml test/enumerateclasses.FIRSTTIME.xml test/enumerateinstancenames.Linux_OperatingSystem.xml test/enumerateinstances.Linux_OperatingSystem.xml test/getclass.Linux_OperatingSystem.xml The first test file above contains the CIM-XML representation of the standard EnumerateClasses CIM client request. # cat test/enumerateclasses.ALL.xml Sending this request to the sfcb CIMOM will return the list of all supported classes for which there is a registered provider [bestorga@bestorga sfcb]$ wbemcat test/enumerateclasses.ALL.xml | more HTTP/1.1 200 OK Content-Type: application/xml; charset="utf-8" Content-Length: 54862 Cache-Control: no-cache CIMOperation: MethodResponse Connection: close TRUE FALSE FALSE TRUE ... The classes listed above will vary depending on what providers are installed on your system. For testing against a host with an IPv6 address, substitute the wbemcat6 utility for wbemcat. The second utility program called xmltest is another script that is also used to send a raw CIM-XML test file to the sfcb CIMOM (using wbemcat) and then compares the returned CIM-XML results against a previously determined 'OK' result file to check whether the returned results match the expected results. If there does not yet exist an 'OK' corresponding to the XML file then xmltest will save the returned results as the new OK file for later use. eg # xmltest test/getclass.Linux_OperatingSystem.xml Running test test/getclass.Linux_OperatingSystem.xml ... OK Saving response as test/getclass.Linux_OperatingSystem.OK # xmltest test/getclass.Linux_OperatingSystem.xml Running test test/getclass.Linux_OperatingSystem.xml ... Passed The xmltest script is used extensively for testing sfcb (or other CIMOMs) using simple CIm-XML test data files, and thereby avoiding any potential errors introduced by a more sophisticated CIM client. In addition to wbemcat and xmltest - which can be considered very rudimentary CIM clients, the SBLIM project includes a more fully-fledged command-line CIM client called wbemcli. wbemcli is installed as part of the automated sfcb install process when using installsfcb.sh, otherwise you will have to downlaod and install the wbemcli package from the SBLIM website. See Section 24 below for more information about wbemcli. Also there are providers included under test/TestProviders along with the relevant test cases to test SFCB functionality. The configuration option --enable-tests has an option 'providers' to enable the providers and its testcases. The same xmltest script is used for execution of the test cases. 16. Debugging sfcb ================== If you suspect an error is occuring in the sfcb the first step is probably to enable the built-in trace messages to see in detail what is happening inside the CIMOM. First you must make sure that sfcb has been compiled with debug enabled (see Section 8) and then restart the sfcbd daemon with the appropriate component trace bit-mask (see Section 11) and trace level (see Section 13) to isolate where things are going wrong. If this is insufficient, then you may wish to attach a runtime debugger to the sfcbd and/or child processes. The pid of the main sfcb broker process, http codec process, and class provider process is displayed on stdout when you start sfcbd from the command line (see Section 10). If you need to attach a debugger to the http codec process immediately that it is started by the main sfcb broker, then sent the environment variable export SFCB_PAUSE_CODEC=http before starting sfcbd. It will then display the http codec pid when the child process is spawned and enter an pause loop to allow you to attach to the process from the debugger. One attached, do the following to exit this pause loop and so be able to debug the normal execution of this process: 1. set a breakpoint at the sleep(5) statement 2006 in providerDrv.c 2. set the next instruction to the first statement after the sleep loop (2009). 3. set any other breakpoint that you desire for debugging and continue The following is the relevant code from providerDrv.c 2932 if (once && debugMode && parms->req->operation != OPS_LoadProvider) for (;;) { 2933 fprintf(stdout,"-#- Pausing for provider: %s -pid: %d\n",name,currentProc); 2934 once=0; 2935 sleep(5); 2936 } 2937 2938 if (parms->req->operation == OPS_LoadProvider || debugMode) { 2939 processProviderInvocationRequestsThread(parms); 2940 } 2941 else { 2942 pthread_create(&t, &tattr, (void *(*)(void *)) 2943 processProviderInvocationRequestsThread, (void *) parms); 2944 } [How pause class provider to attach debugger?] If the error(s) are determined to be in the SBLIM provider library, not the sfcb itself, then you should enabled provider debug messages using the SBLIM_TRACE environment variable and/or try attaching a runtime debugger to the provider's process and set appropriate breakpoints. See Section 23 below for more information about debugging providers. 17. Class Repository ==================== sfcb stores information about the CIM classes implemented by all its installed providers in the class repository. This consists of the directory tree comprised of the CIM namespace components. Typically the CIM namespaces known to a CIMOM are "root/cimv2" and "root/interop", which respectively translate to the class repository directory paths /usr/local/var/lib/sfcb/registration/repository/root/cimv2 and /usr/local/var/lib/sfcb/registration/repository/root/interop Note: CIM namespaces are automatically converted to lowercase letters when looking for the corresponding directory tree under /usr/local/var/lib/sfcb/registration/repository/ Each namespace leaf directory contains a single file called "classSchemas" that contains a compiled binary representation of *all* the CIM classes registered under that namespace (aside: this file is generated by sfcbmof from the class definition files in the staging area when sfcbrepos is run). In addition to the actual CIM classes defined in the providers mofs, the classSchemas file also contain necessary information about any of their CIM superclasses (hence the need to install the DMTF CIM Schema!). In addition each namespace leaf directory may contain a file called "qualifiers", containing all qualifiers for the namespace. When sfcbd first starts up the internal class provider will scan the directory /usr/local/var/lib/sfcb/registration/repository/ and all its subdirs to determine the registered namespaces, and then for each namespace decode the classSchema's to build the class hierarchy. 18. Adding New Classes ====================== As described earlier, sfcb does not support CIM class operations for dynamically adding, removing or modifying CIM classes. Instead, classes must be added, modified or removed in an offline fashion and then the sfcb restarted to register the changes. sfcb uses a 'staging area' to store providers class and registration information, specifically /usr/local/var/lib/sfcb/stage. Adding a new provider and its implemented classes consists of copying the provider class definition(s) files - called 'mofs' - to the staging area's ./mof subdirectory, and copying a registration file containing the name of the class(es), type of provider (instance, association, etc) and the name of the executable library file to the ./regs subdirectory. Note that subdirectories under the staging area's ./mofs designate namespaces in the same way described in the preceding section about the class repository. There are two default mof files in the staging directory, indication.mof (if indication support is enabled) and interop.mof as can be seen below. MOF files residing in the root stage mof directory (e.g. /usr/local/var/lib/sfcb/stage/mofs) will be compiled into each namespace when invoking sfcbrepos. This is useful if you want to have a set of default classes in each namespace (as it happens with the indication classes). The interop.mof is located in the interop namespace directory and will only be compiled into the interop namespace. The layout may look like the following example: # ls /usr/local/var/lib/sfcb/stage default.reg mofs regs # ls /usr/local/var/lib/sfcb/stage/mofs indication.mof root # ls /usr/local/var/lib/sfcb/stage/mofs/root cimv2 interop # ls /usr/local/var/lib/sfcb/stage/mofs/root/cimv2 CWS_Authorization.mof Linux_Base.mof TST_MethodProperties.mof CWS_FAD.mof TST_InstanceDefaults.mof TST_ProcessIndication.mof CWS_Instance.mof TST_InstanceKeys.mof TST_Reef.mof CWS_Process.mof TST_InstanceProperties.mof Linux_BaseIndication.mof TST_LifeCycleInstance.mof # ls /usr/local/var/lib/sfcb/stage/mofs/root/interop interop.mof # ls /usr/local/var/lib/sfcb/stage/regs CWS_Authorization.reg Linux_BaseIndication.reg TST_ProcessIndication.reg CWS_FAD.reg TST_InstanceTest.reg TST_Reef.reg CWS_Instance.reg TST_LifeCycleIndication.reg CWS_Process.reg TST_MethodTest.reg # cat /usr/local/var/lib/sfcb/stage/regs/CWS_FAD.reg [CWS_Directory] provider: CWS_DirectoryProvider location: CWS_Directory type: instance namespace: root/cimv2 # [CWS_PlainFile] provider: CWS_PlainFileProvider location: CWS_PlainFile type: instance method namespace: root/cimv2 # [CWS_DirectoryContainsFile] provider: CWS_DirectoryContainsFileProvider location: CWS_DirectoryContainsFile type: association namespace: root/cimv2 # The mof files copied into the staging area are identical to DMTF class definition mofs - merely copy the mof file(s) that should always be included with a provider to the ./mof subdirectory structure. sfcb uses a custom provider registration file for each provider that must typically be created by hand for new providers (Note: all SBLIM providers in the SBLIM website already include an generic registration file that is used to auto-generate the necessary .reg file for sfcb). The format of the sfcb registration file is [ ] provider: location: type: [instance] [association] [method] [indication] group: unload: never namespace: ... user: where: The CIM class name (required) The CMPI provider name (required) The name of the provider library (required) type The type of the provider (required). This can be any combination of: instance, association, method or indication. This enables multiple providers to be grouped together and run under a single process to futher minimize runtime footprint. All providers registered under the same will execute in the same provider process. This is optional - by default each provider will be run as a separate process. unload This defines the unload policy for this provider. Currently the only supported option is "never", which specifies that the provider will not be subjected to idle time monitoring and never unloaded. This is optional - by default each provider will be unloaded when its idle times exceeds that specified in the config file (see Section 12). namespace List of namespaces for which this provider can execute. This is required, although for most providers this will be "root/cimv2". user The username to run the provider process under. This is optional. If specified, the provider will have its uid set to match the given username. If not specified, the default user will be used based on the settings within the sfcb.cfg file. All providers within a provider group must use the same username. Once all the class defintions and provider registration files are stored in the staging aread, running the command /usr/local/bin/sfcbrepos -f will rebuild the sfcb class repository from all the files. In this manner classes can be added, removed or modified. After rebuilding the class repository restart sfcb to get it to register the changes, by /usr/local/etc/init.d/sfcb restart or killall -1 sfcbd Alternatively, the sfcb package contains a utility script that can be used to copy a provider's class mofs and registration file to the correct locations in the staging area. /usr/local/bin/sfcbstage -r [provider.reg] [class1.mof] [class2.mof] ... after which you must still rebuild the class repository and restart sfcb as before. 19. Indications =============== Indications are enabled via the configure script. They are enabled by default. For indication providers, it is possible and necessary to register the same classname for different providers. A sample providerRegister file could look like this: [CIM_InstModification] provider: SAM_DeviceProvider location: SAM_Device type: indication namespace: root/cimv2 # [CIM_InstModification] provider: OSBase_OperatingSystemProvider location: cmpiOSBase_OperatingSystemProvider type: indication namespace: root/cimv2 # [CIM_OperatingSystem] provider: OSBase_OperatingSystemProvider location: cmpiOSBase_OperatingSystemProvider type: instance namespace: root/cimv2 # Now you would create a handler, a filter and a subscription instance. Sample xml files for this can be found in the SBLIM cmpi-base package in the directory test/indication. For the example above a query property of the filter could look like this: "SELECT * FROM CIM_InstModification WHERE SourceInstance ISA CIM_OperatingSystem" Now all providers registered for CIM_InstModification and located in the namespace as specified by the SourceNamespace property of the filter are invoked. You do not have to separate the indication and instance provider. An implementation like the following is perfectly ok: [CIM_InstModification] provider: OSBase_OperatingSystemProvider location: cmpiOSBase_OperatingSystemProvider type: indication instance namespace: root/cimv2 # [CIM_OperatingSystem] provider: OSBase_OperatingSystemProvider location: cmpiOSBase_OperatingSystemProvider type: indication instance namespace: root/cimv2 # 20. Alternative Class Providers =============================== As the class repository is implemented via a provider, it can easily be replaced by registerening an alternative provider in providerRegister. sfcb comes with three different class providers: sfcClassProvider ---------------- The default class provider: it loads all the classSchema file from the repository tree in memory. It's fast but can consume a lot of memory with larger schemas. At present it's the only class provider allowing to add, modify and delete classes while sfcb is running. sfcClassProviderGz ------------------ The compressing and caching class provider: it only holds a last recently used classes in a cache and will reload classes from the filesystem repository as needed. It is also capable to handle classSchema files compressed via gzip. It requires libgz to operate. This provider doesn't support add, modify and delete. sfcClassProviderMem ------------------- This is a special purpose provider which allows to compile the schema into the provider. In consequence, no repository is needed on the file system. In order to use it in a meaningful way it is necessary to produce C source files containing the schema information, add those to the set of sources for the class provider and rebuild it. The default implementation of sfcClassProviderMem comes with a prebuilt root/interop namespace. This provider doesn't support add, modify and delete. Instructions for adding namespaces to sfcClassProviderMem .......................................................... Build and install sfcb as usual. Then build and install the providers, including the post-install steps required to build the repository. Next, create a C source file from the class schema files in all the namespaces you want to include into the class provider. For this purpose, there's a program called classSchema2c, which you should invoke like this (for a namespace "xyz"): classSchema2c /usr/local/var/lib/sfcb/registration/repository/root/xyz xyz \ > xyz_classSchema.c This produces a file xyz_classSchema.c (by default, sfcb is shipped with a interop_classSchema.c) which needs to be compiled and linked with the class provider library. In order to do this, spot the line in Makefile.am starting with sfcClassProviderMem_la_SOURCES and append this file's name to list of source files. I.e., change libsfcClassProviderMem_la_SOURCES = \ classProviderMem.c classSchemaMem.c interop_classSchema.c to libsfcClassProviderMem_la_SOURCES = \ classProviderMem.c classSchemaMem.c interop_classSchema.c xyz_classSchema.c There's one step left to do: you must edit the file classSchemaMem.c and add a reference to the data structures in xyz_classSchemas.c to it. I.e., add extern ClassSchema xyz_classes; after the other extern ClassSchema statements, and add the line { "xyz", &xyz_classes }, before the line containing { NULL, NULL } That may sound complicated, just have a look at the file and you'll understand what to do. HINT: Before using sfcClassProviderMem you should verify that providers and schema work with the default class provider. Cross-Build Support for sfcClassProviderMem ........................................... When cross-compiling sfcb for another platform the endianness, alignment and padding of the structures in the generated source file might not be correct. The option -X can be used to specify the cross-compilation target. Currently it is possible to produde compilable class schema files for big-endian 32-bit platforms on an i386 based host, by invoking classSchema.c like this: classSchema2c -X P32 /usr/local/var/lib/sfcb/registration/repository/root/xyz xyz \ > xyz_classSchema.c This has been tested for the following platforms: s390 (31-bit) ppc (32-bit) 21. Authentication Support ========================== sfcb can be configured to support HTTP basic authentication and authentication based on client certificates (for HTTP over SSL connections). Basic authentication is enabled by specifying doBasicAuth=true in the sfcb configuration file. With basic authentication enabled, the HTTP adapter will load the shared library specifed via the basicAuthLib configuration property and call the function _sfcBasicAuthenticate with user id and password from the HTTP header in order to authenticate the client request. The default implementation in libsfcBasicAuthentication.so is always failing the authentication request. Users of sfcb are encouraged to write their own basic authentication support. For systems supporting the Pluggable Authentication Modules (PAM) approach there's a basic authentication library called libsfcBasicPAMAuthentication.so. This library will be built when the configure script is invoked with --enable-pam. Client certificate based authentication is available if SSL support for sfcb is enabled (via ./configure --enable-ssl). If the clientCertificate configuration property is set to "accept" or "require" the sfcb HTTP adapter will request a certificate from clients connecting via HTTP over SSL (HTTPS). If "require" was specified, the client MUST present a valid certificate according to the client trust store specified via sslClientTrustStore. If the client fails to do so, the connection will be rejected. The case clientCertificate=accept is perhaps less obvious but useful in the case where both basic and client certificate authentication are configured. If the client is able to present a trusted certificate, the HTTP adapter will load the shared library specifed via the certificateAuthLib configuration property and call the function _sfcCertificateAuthenticate with the certificate. The function can now check this certificate and map it to a principal (=user id), in which case the basic authentication procedure will not be executed. If this function cannot determine the certificate to principal mapping, the HTTP basic authentication will take place. The default implementation of in libsfcCertificateAuthentication is fairly useful already, as it maintains a list of certificate/principal pairs in shared memory. This list is automatically updated if a client can both supply a trusted certificate AND succesfully authenticate via HTTP basic authentication. In the case of special requirements, it is necessary to implement a custom certificate authentication library. 22. Installing Existing SBLIM Providers ======================================= The cmpi-base SBLIM provider package - which is installed by default when you install sfcbd from CVS using the installsfcb.sh script - implements the following commonly used system management CIM classes: Linux_ComputerSystem Linux_BaseBoard Linux_OperatingSystem Linux_OperatingSystemStatisticalData Linux_UnixProcess Linux_Processor Linux_RunningOS Linux_CSBaseBoard Linux_OSProcess Linux_OperatingSystemStatistics Linux_CSProcessor All SBLIM providers are autoconf'ed and therefore it is just a matter of downloading the provider source tarball (or obtaining the provider source files from CVS) and then running ./configure make su -c 'make install' su -c 'make postinstall' Other SBLIM providers are installed in the same manner, however please check their README file for any special installation instructions. When you install the cmpi-base package it will detect that you are running the sfcb and automatically copy the necessary files for the sfcb staging area, rebuild the repository, and if necessary restart the sfcb. You can then start issuing client requests against the newly added CIM classes. Please go to the SBLIM Project home page at http://sblim.sourceforge.net/ for a full list of available SBLIM providers, including a number of test providers. 23. Debugging SBLIM Providers ============================= Many of the existing SBLIM providers include extensive degub/trace messages to aid in debugging errors that may occur when running the providers. To enable debug messages set the environment variable export SBLIM_TRACE=[1..4] See Section 13 for a more detailed description of this variable. If you wish to save the resulting debug messages to a file, instead of having them printed to STDERR, then set the environment variable export SBLIM_TRACE_FILE=/path/to/file. After setting either variable you must get all the SBLIM providers to be reloaded, which is most easily accomplished by restarting sfcb. Unlike the similar trace/debug messages found in sfcb itself, SBLIM providers do not typically have component-level tracing, hence there is no equivalent bit-mask that you can set to restrict debug messages to individual providers. Enabling SBLIM_TRACE will turn on debugging for all SBLIM providers with SBLIM_TRACE support. If the debug messages do not provide adequate information by which to isolate the problem, it is possible to attach a runtime debugger to the provider processes and set breakpoints. Along the same lines as attaching a runtime debugger to the sfcb processes (described in Section 15) to attach a debugger to a provider process immediately after it is started by the main sfcb broker, set the environment variable export SFCB_PAUSE_PROVIDER= before starting sfcbd. sfcb will then display the provider pid when the child process is spawned and enter a pause loop to allow you to attach to the process from the debugger. Once attached, do the following to exit the pause loop and so be able to debug the normal execution of the provider process: 1. set a breakpoint at the sleep(5) statement at line 2459 in providerDrv.c.and continue. 2. set the value of the variable debug_break to 1 so that the pause loop will be broken out of when line 2456 is executed. 3. set any breakpoints you desire in the provider code and continue. NOTE: Due to optimization, setting debug_break might not work. In this case sfcb will need to be built without optimizations by adding "CFLAGS=-g" when configuring sfcb. The following is the relevant code from providerDrv.c 2455 if (once && debugMode && parms->req->operation != OPS_LoadProvider) for (;;) { 2456 if (debug_break) break; 2457 fprintf(stdout,"-#- Pausing for provider: %s -pid: %d\n",name,currentProc); 2458 once=0; 2459 sleep(5); 2460 } 2461 2462 if (parms->req->operation == OPS_LoadProvider || debugMode) { 2463 processProviderInvocationRequestsThread(parms); 2464 } 2465 else { 2466 pthread_create(&t, &tattr, (void *(*)(void *)) 2467 processProviderInvocationRequestsThread, (void *) parms); 2468 } 24. wbemcli, sfcc and other CIM Clients ======================================= The SBLIM Project includes an Open Source command-line CIM client 'wbemcli' that can be used to send CIM requests to the sfcb and display returned results. wbemcli is installed by default if you build & install sfcb with the included install script. However, if you build & install sfcb by other means then you will need to download wbemcli separately from the SBLIM Project home page. For example, to list all the classes implemented by the various SBLIM providers registed to sfcb you can use wbemcli to send the "EnumerateClasses" (ec) CIM client request to sfcb, which then display the returned results. e.g. wbemcli -dx ec http://localhost/root/cimv2 You should see an output similar to: To server: From server: Content-Type: application/xml; charset="utf-8" From server: Content-Length: 54862 From server: Cache-Control: no-cache From server: CIMOperation: MethodResponse From server: Connection: close From server: TRUE FALSE FALSE TRUE ... ... The -dx option enables you to see both the actual XML send to sfcb from the wbemcli clients, as well as all the actual XML received. In the example above, the first (of many!) classes returned as "CIM_Directory", followed by "Linux_OSProcess". Similar entries will appear for the other registered CIM classes. Ommiting the -dx option causes wbemcli to display only a compact representation of the returned data. eg # wbemcli ec http://localhost/root/cimv2 localhost:5988/root/cimv2:CIM_Directory InUseCount,EncryptionMethod,CompressionMethod,Executable,Writeable,Readable,LastAccessed,LastModified,CreationDate,FileSize,Name,CreationClassName,FSName,FSCreationClassName,CSName,CSCreationClassName,Status,StatusDescriptions,OperationalStatus,InstallDate,Caption,Description,ElementName localhost:5988/root/cimv2:TST_LifeCycleInstance ElementName,Description,Caption,id localhost:5988/root/cimv2:Linux_OSProcess GroupComponent,PartComponent ... The SBLIM project also include a prototype Small-Footprint CIM Client (sfcc) that provides a C-based API for client applications to send/receive CIM client commands to a CIMOM (e.g. sfcb, although any CIMOM compatible with CIMXML-over-http will also work). Please got the the SBLIM Website for more information about sfcc. Other CIM clients, such as CLI from the OpenPegasus project and the graphical cimbrowser from the SNIA cimom projcet, can also be used to send and receive CIM client commands to sfcb and browse the hierarchy of CIM classes supported by its registered providers. Please see the approriate home page for these clients for more information. In general, *any* CIM client that adheres to the CIMXML-over-http standard should work with sfcbd (except for the unsupported CIM operations mentioned in Section 1). 25. SLP Support =============== Prerequisites for slp support are the openslp library available from http://www.openslp.org and the sfcc library available from our SBLIM project at http://sblim.sourceforge.net. It is possible to build sfcb with support for slp advertisements. There are two possibilities: a) as a standalone executable, if compiled with --enable-slp=standalone b) as a process forked from sfcbd, if compiled with --enable-slp[=yes] When using option a) the binary cimslp will be installed in /usr/local/bin It takes several arguments, such as the host where the cimserver is running. For a complete list, invoke "cimslp --help". The options should be self-explanatory. One note on the lifetime parameter: An slp registration lasts only a certain amount of time. This can be configured with the "-l" option (a postive int value, seconds). How cimslp works is that it registers the CIM service with the specified amount of time, sleeps for a little less, checks if anything changed and reregisters the service. If the option is not specified, SLP_LIFETIME_DEFAULT will be used (see ). When using option b) a library called libslpAgent will be built which gets forked as a new process once sfcbd is started. It uses the same procedures as sfcbd for getting configuration parameters, so the parameters specified in the config file apply to the slp process as well, namely enableHttp, enableHttps, httpPort and httpsPort. The lifetime is configured via the config file as well, see parameter slpRefreshInterval in section 12. The behaviour is the same as described for the standalone process above. For the syntax of the advertised attributes see the WBEM SLP Template available from the dmtf website at: http://www.dmtf.org/standards/wbem/wbem.1.0.en If you have a provider registered for a CIM_RegisteredProfile class and you would like it to be advertised via slp, ensure that the AdvertiseTypes property is set to {3}. Any other state will prevent the profile name from being included in the slp advertisement. 26. Files ========= /usr/local/sbin/sfcbd Small-footprint CIM broker daemon. /usr/local/bin/sfcbmof MOF compiler for sfcb. Generates binary class data from plaintest MOF class defintion. /usr/local/bin/sfcbstage Copy provider mof and registration files to sfcb staging area. Used to add classes to sfcb offline. /usrlocal/bin/sfcbustage Remove provider mof and registration files from sfcb staging area. Used to remove classes to sfcb offline. /usr/local/bin/sfcbrepos Rebuild sfcb class repository from staging files. /usr/local/bin/cimslp Registers a cimom with slp (only available if configured and build with --enable-slp=standalone) /usr/local/var/lib/sfcb/registration/providerRegister Contains registration data for all installed providers. /usr/local/var/lib/sfcb/registration/providerRegister.previous Contains registration data for all installed providers from previous time sfcbrepos was run. This can be used to restore an earlier class repository in case sfcbrepos generates a corrupt one. /usr/local/var/lib/sfcb/registration/repository/* Contain class repository directory for all supported CIM namespaces. /usr/local/var/lib/sfcb/registration/repository.previous/* Contain class repository directory for all supported CIM namespaces from the previous time sfcbrepos was run. This can be used to restore an earlier class repository in case sfcbrepos generates a corrupt one. /usr/local/var/lib/sfcb/stage/default.reg Registration data for the default built-in sfcb internal providers. /usr/local/var/lib/sfcb/stage/interop.mof Dummy classes used to added CIM indication support to the default interop namespace. /usr/local/var/lib/sfcb/stage/mofs/* Class definitions for all installed providers. /usr/local/var/lib/sfcb/stage/regs/* Registration info for all installed providers. /usr/local/lib/sfcb/libsfc* Binaries for sfcb runtime libraries. /usr/local/lib/cmpi/* Binaries for providers. /usr/local/etc/init.d/sfcb Control script to start/stop/restart sfcbd daemon. /usr/local/etc/sfcb/sfcb.cfg Default sfcb configuration file. /usr/local/share/genSslCert.sh Script to generate SSL certificates for https (if enabled). /usr/local/etc/sfcb/server.pem SSL server certificate for sfcb /usr/local/etc/sfcb/file.pem SSL private key file for sfcb /usr/local/share/getSchema.sh Script to download and install CIM schema. /usr/local/share/CIM/* Class definitions for DMTF CIM schema. /usr/local/bin/wbemcli (if installed) Command-line CIM client. /usr/local/bin/wbem[ai|ain|ci|cm|cmx|dc|di|ec|ecn|gc|gcd|gi|gp|mi|ri|rin|sp] Shortcuts for wbemcli operations. e.g. wbemgi ... is the same as wbemcli gi ... [gi=GetInstance] /usr/local/include/cmpi/* CMPI API headers (used to build providers) 27. Support and Reporting Bugs ============================== The SBLIM project maintains a mailing list to which you should direct all questions regarding sfcb, sfcc, wbemcli, or any of the SBLIM providers. To subscribe to this mailing list visit http://lists.sourceforge.net/lists/listinfo/sblim-devel The SBLIM Project Bug tracking page can be found at: http://sourceforge.net/tracker/?group_id=128809&atid=712784 Here you will find a list of all known bugs for SFCB (set the Category field to "sfcb"). You can also report new bugs and request features. When reporting a bug, please provide a good description and attach any useful files, such as patches or the XML used to generate the error. 28. Troubleshooting =================== Problem: Receive "error while loading shared libraries" on sfcbd startup Cause: The location of the sfcb .so files are not in your library path Solution: Add the location of the sfcb .so files to /etc/ld.so.conf and run ldconfig. By default, they are installed in /usr/local/lib Problem: Can't register providers: sfcbmof not found Cause: You are building from CVS and forgot to get mofc Solution: See Sec. 6 "Building sfcb and mofc" above Problem: Can't register new providers; sfcbrepos/sfcbmof fails after upgrading from 1.2.x to 1.3.x Cause: Most likely you forgot to get the new version of mofc and an old, incompatible version of sfcbmof was left behind from a previous install. Solution: Build the latest mofc with sfcb as described in Sec. 6. If using the same install path as before, this will overwrite the old sfcbmof. Make sure to run sfcbrepos or rerun the entire sfcb build process again to create a new copy of the repository Problem: "unsupported object implementation format" error on startup Cause: The repository is old or corrupt Solution: Run sfcbrepos to rebuild the repository Problem: "operation on non-socket" error on startup Cause: The repository is out-of-date Solution: Run sfcbrepos to rebuild the repository Problem: sfcbrepos does not exist Cause: You are building sfcb from CVS and do not have the mof compiler Solution: Build the latest mofc with sfcb as described in Sec. 6. Note: you should NOT run configure in the mofc subdirectory; the sfcb configure script will take care of this Problem: "Inconsistent provider registration for [provider] (2)" error when issuing a CIM request Cause: sfcb is expecting the provider to be a type that it is not Solution: Most likely problem is that "type" is set incorrectly in the providerRegister file for the requested provider.
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