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lib/rpmrollback.c

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00001 
00005 #include "system.h"
00006 
00007 #include <rpmio.h>
00008 #define _RPMTE_INTERNAL         /* XXX findErases needs rpmte internals. */
00009 #define _RPMTS_INTERNAL         /* XXX ts->teErase, ts->probs */
00010 #define _RPMTS_PRINT
00011 #include <rpmcli.h>
00012 
00013 #include "rpmdb.h"
00014 #include "rpmds.h"
00015 
00016 #include "manifest.h"
00017 #include "misc.h"               /* XXX rpmGlob() */
00018 #include "rpmgi.h"              /* XXX rpmgiEscapeSpaces */
00019 #include "debug.h"
00020 
00021 /*@access FD_t @*/      /* XXX void * arg */
00022 /*@access rpmts @*/
00023 /*@access rpmte @*/     /* XXX p->hdrid, p->pkgid, p->NEVRA */
00024 /*@access IDTX @*/
00025 /*@access IDT @*/
00026 
00027 /*@unchecked@*/
00028 static int reverse = -1;
00029 
00032 static int IDTintcmp(const void * a, const void * b)
00033         /*@*/
00034 {
00035     /*@-castexpose@*/
00036     return ( reverse * (((IDT)a)->val.u32 - ((IDT)b)->val.u32) );
00037     /*@=castexpose@*/
00038 }
00039 
00040 IDTX IDTXfree(IDTX idtx)
00041 {
00042     if (idtx) {
00043         int i;
00044         if (idtx->idt)
00045         for (i = 0; i < idtx->nidt; i++) {
00046             IDT idt = idtx->idt + i;
00047             idt->h = headerFree(idt->h);
00048             idt->key = _free(idt->key);
00049         }
00050         idtx->idt = _free(idtx->idt);
00051         idtx = _free(idtx);
00052     }
00053     return NULL;
00054 }
00055 
00056 IDTX IDTXnew(void)
00057 {
00058     IDTX idtx = xcalloc(1, sizeof(*idtx));
00059     idtx->delta = 10;
00060     idtx->size = sizeof(*((IDT)0));
00061     return idtx;
00062 }
00063 
00064 IDTX IDTXgrow(IDTX idtx, int need)
00065 {
00066     if (need < 0) return NULL;
00067     if (idtx == NULL)
00068         idtx = IDTXnew();
00069     if (need == 0) return idtx;
00070 
00071     if ((idtx->nidt + need) > idtx->alloced) {
00072         while (need > 0) {
00073             idtx->alloced += idtx->delta;
00074             need -= idtx->delta;
00075         }
00076         idtx->idt = xrealloc(idtx->idt, (idtx->alloced * idtx->size) );
00077     }
00078     return idtx;
00079 }
00080 
00081 IDTX IDTXsort(IDTX idtx)
00082 {
00083     if (idtx != NULL && idtx->idt != NULL && idtx->nidt > 0)
00084         qsort(idtx->idt, idtx->nidt, idtx->size, IDTintcmp);
00085     return idtx;
00086 }
00087 
00088 IDTX IDTXload(rpmts ts, rpmTag tag, uint32_t rbtid)
00089 {
00090     HE_t he = memset(alloca(sizeof(*he)), 0, sizeof(*he));
00091     IDTX idtx = NULL;
00092     rpmdbMatchIterator mi;
00093     Header h;
00094     uint32_t tid;
00095     int xx;
00096 
00097     mi = rpmtsInitIterator(ts, tag, NULL, 0);
00098 #ifdef  NOTYET
00099     (void) rpmdbSetIteratorRE(mi, RPMTAG_NAME, RPMMIRE_DEFAULT, '!gpg-pubkey');
00100 #endif
00101     while ((h = rpmdbNextIterator(mi)) != NULL) {
00102         he->tag = tag;
00103         xx = headerGet(h, he, 0);
00104         if (!xx || he->p.ui32p == NULL)
00105             continue;
00106         tid = (he->p.ui32p ? he->p.ui32p[0] : 0);
00107         he->p.ptr = _free(he->p.ptr);
00108 
00109         if (tid == 0 || tid == -1)
00110             continue;
00111 
00112         /* Don't bother with headers installed prior to the rollback goal. */
00113         if (tid < rbtid)
00114             continue;
00115 
00116         idtx = IDTXgrow(idtx, 1);
00117         if (idtx == NULL || idtx->idt == NULL)
00118             continue;
00119 
00120         {   IDT idt;
00121             /*@-nullderef@*/
00122             idt = idtx->idt + idtx->nidt;
00123             /*@=nullderef@*/
00124             idt->done = 0;
00125             idt->h = headerLink(h);
00126             idt->key = NULL;
00127             idt->instance = rpmdbGetIteratorOffset(mi);
00128             idt->val.u32 = tid;
00129         }
00130         idtx->nidt++;
00131     }
00132     mi = rpmdbFreeIterator(mi);
00133 
00134     return IDTXsort(idtx);
00135 }
00136 
00137 IDTX IDTXglob(rpmts ts, const char * globstr, rpmTag tag, uint32_t rbtid)
00138 {
00139     HE_t he = memset(alloca(sizeof(*he)), 0, sizeof(*he));
00140     IDTX idtx = NULL;
00141     Header h;
00142     uint32_t tid;
00143     FD_t fd;
00144     const char ** av = NULL;
00145     const char * fn;
00146     int ac = 0;
00147     rpmRC rpmrc;
00148     int xx;
00149     int i;
00150 
00151     av = NULL;  ac = 0;
00152     fn = rpmgiEscapeSpaces(globstr);
00153     xx = rpmGlob(fn, &ac, &av);
00154     fn = _free(fn);
00155 
00156     if (xx == 0)
00157     for (i = 0; i < ac; i++) {
00158         int isSource;
00159 
00160         fd = Fopen(av[i], "r.fdio");
00161         if (fd == NULL || Ferror(fd)) {
00162             rpmlog(RPMLOG_ERR, _("open of %s failed: %s\n"), av[i],
00163                         Fstrerror(fd));
00164             if (fd != NULL) (void) Fclose(fd);
00165             continue;
00166         }
00167 
00168         rpmrc = rpmReadPackageFile(ts, fd, av[i], &h);
00169         (void) Fclose(fd);
00170         switch (rpmrc) {
00171         default:
00172             goto bottom;
00173             /*@notreached@*/ /*@switchbreak@*/ break;
00174         case RPMRC_NOTTRUSTED:
00175         case RPMRC_NOKEY:
00176         case RPMRC_OK:
00177             isSource =
00178                 (headerIsEntry(h, RPMTAG_SOURCERPM) == 0 &&
00179                  headerIsEntry(h, RPMTAG_ARCH) != 0);
00180             if (isSource)
00181                 goto bottom;
00182             /*@switchbreak@*/ break;
00183         }
00184 
00185 { const char * origin = headerGetOrigin(h);
00186 assert(origin != NULL);
00187 assert(!strcmp(av[i], origin));
00188 }
00189         he->tag = tag;
00190         xx = headerGet(h, he, 0);
00191         if (!xx || he->p.ui32p == NULL)
00192             goto bottom;
00193         tid = (he->p.ui32p ? he->p.ui32p[0] : 0);
00194         he->p.ptr = _free(he->p.ptr);
00195 
00196         /* Don't bother with headers installed prior to the rollback goal. */
00197         if (tid < rbtid)
00198             goto bottom;
00199 
00200         idtx = IDTXgrow(idtx, 1);
00201         if (idtx == NULL || idtx->idt == NULL)
00202             goto bottom;
00203 
00204         {   IDT idt;
00205             idt = idtx->idt + idtx->nidt;
00206             idt->done = 0;
00207             idt->h = headerLink(h);
00208             idt->key = av[i];
00209             av[i] = NULL;
00210             idt->instance = 0;
00211             idt->val.u32 = tid;
00212         }
00213         idtx->nidt++;
00214 bottom:
00215         h = headerFree(h);
00216     }
00217 
00218     for (i = 0; i < ac; i++)
00219         av[i] = _free(av[i]);
00220     av = _free(av);     ac = 0;
00221 
00222     return IDTXsort(idtx);
00223 }
00224 
00234 static int cmpArgvStr(rpmts ts, const char *lname, const char ** AV, int AC,
00235                 /*@null@*/ const char * B)
00236         /*@modifies ts @*/
00237 {
00238     const char * A;
00239     int i;
00240 
00241     if (AV != NULL && AC > 0 && B == NULL) {
00242       if (!strcmp(lname, "NEVRA")) {
00243         rpmps ps = rpmtsProblems(ts);
00244         for (i = 0; i < AC && (A = AV[i]) != NULL; i++) {
00245             rpmpsAppend(ps, RPMPROB_NOREPACKAGE,
00246                         NULL, NULL,     /* NEVRA, key */
00247                         lname, NULL,    /* dn, bn */
00248                         A,              /* altNEVRA */
00249                         0);
00250         }
00251         ps = rpmpsFree(ps);
00252       }
00253         return 0;
00254     }
00255 
00256     if (AV != NULL && B != NULL)
00257     for (i = 0; i < AC && (A = AV[i]) != NULL; i++) {
00258         if (*A && *B && !strcmp(A, B))
00259             return 1;
00260     }
00261     return 0;
00262 }
00263 
00279 static int findErases(rpmts ts, /*@null@*/ rpmte p, unsigned thistid,
00280                 /*@null@*/ IDT ip, int niids)
00281         /*@globals rpmGlobalMacroContext, h_errno, fileSystem, internalState @*/
00282         /*@modifies ts, p, ip, rpmGlobalMacroContext, fileSystem, internalState @*/
00283 {
00284     HE_t he = memset(alloca(sizeof(*he)), 0, sizeof(*he));
00285     int rc = 0;
00286     int xx;
00287 
00288     /* Erase the previously installed packages for this transaction. 
00289      * Provided this transaction is not excluded from the rollback.
00290      */
00291     while (ip != NULL && ip->val.u32 == thistid) {
00292 
00293         if (ip->done)
00294             goto bottom;
00295 
00296         {
00297             const char ** flinkPkgid = NULL;
00298             const char ** flinkHdrid = NULL;
00299             const char ** flinkNEVRA = NULL;
00300             uint32_t pn, hn, nn;
00301             int bingo;
00302 
00303             he->tag = RPMTAG_BLINKPKGID;
00304             xx = headerGet(ip->h, he, 0);
00305             flinkPkgid = he->p.argv;
00306             pn = he->c;
00307 
00308             /* XXX Always erase packages at beginning of upgrade chain. */
00309             if (pn == 1 && flinkPkgid[0] != NULL && !strcmp(flinkPkgid[0], RPMTE_CHAIN_END)) {
00310                 flinkPkgid = _free(flinkPkgid);
00311                 goto erase;
00312             }
00313 
00314             he->tag = RPMTAG_BLINKHDRID;
00315             xx = headerGet(ip->h, he, 0);
00316             flinkHdrid = he->p.argv;
00317             hn = he->c;
00318             he->tag = RPMTAG_BLINKNEVRA;
00319             xx = headerGet(ip->h, he, 0);
00320             flinkNEVRA = he->p.argv;
00321             nn = he->c;
00322 
00323             /*
00324              * Link data may be missing and can have multiple entries.
00325              */
00326             /* XXX Until link tags are reliably populated, check in the order
00327              *  NEVRA -> hdrid -> pkgid
00328              * because NEVRA is easier to debug (hdrid/pkgid are more precise.)
00329             */
00330             bingo = 0;
00331             if (!bingo)
00332                 bingo = cmpArgvStr(ts, "NEVRA", flinkNEVRA, nn, (p ? p->NEVRA : NULL));
00333             if (!bingo)
00334                 bingo = cmpArgvStr(ts, "Hdrid", flinkHdrid, hn, (p ? p->hdrid : NULL));
00335 /*@-nullstate@*/
00336             if (!bingo)
00337                 bingo = cmpArgvStr(ts, "Pkgid", flinkPkgid, pn, (p ? p->pkgid : NULL));
00338 /*@=nullstate@*/
00339             flinkPkgid = _free(flinkPkgid);
00340             flinkHdrid = _free(flinkHdrid);
00341             flinkNEVRA = _free(flinkNEVRA);
00342 
00343             if (bingo < 0) {
00344                 rc = -1;
00345                 goto exit;
00346             }
00347 
00348             if (!bingo)
00349                 goto bottom;
00350         }
00351 
00352 erase:
00353         rpmlog(RPMLOG_DEBUG, D_("\t--- erase h#%u\n"), ip->instance);
00354 
00355         rc = rpmtsAddEraseElement(ts, ip->h, ip->instance);
00356         if (rc != 0)
00357             goto exit;
00358 
00359         /* Cross link the transaction elements to mimic --upgrade. */
00360         if (p != NULL) {
00361             rpmte q = ts->teErase;
00362             xx = rpmteChain(p, q, ip->h, "Rollback");
00363         }
00364 
00365 #ifdef  NOTYET
00366         ip->instance = 0;
00367 #endif
00368         ip->done = 1;
00369 
00370 bottom:
00371 
00372         /* Go to the next header in the rpmdb */
00373         niids--;
00374         if (niids > 0)
00375             ip++;
00376         else
00377             ip = NULL;
00378     }
00379 
00380 exit:
00381     return rc;
00382 }
00383 
00385 int rpmRollback(rpmts ts, QVA_t ia, const char ** argv)
00386 {
00387     int ifmask= (INSTALL_UPGRADE|INSTALL_FRESHEN|INSTALL_INSTALL|INSTALL_ERASE);
00388     unsigned thistid = 0xffffffff;
00389     unsigned prevtid;
00390     time_t tid;
00391     IDTX itids = NULL;
00392     IDTX rtids = NULL;
00393     IDT rp;
00394     int nrids = 0;
00395     IDT ip;
00396     int niids = 0;
00397     int rc = 0;
00398     int vsflags, ovsflags;
00399     int numAdded;
00400     int numRemoved;
00401     int _unsafe_rollbacks = 0;
00402     rpmtransFlags transFlags = ia->transFlags;
00403     rpmdepFlags depFlags = ia->depFlags;
00404     int xx;
00405 
00406     if (argv != NULL && *argv != NULL) {
00407         rc = -1;
00408         goto exit;
00409     }
00410 
00411     _unsafe_rollbacks = rpmExpandNumeric("%{?_unsafe_rollbacks}");
00412 
00413     vsflags = rpmExpandNumeric("%{?_vsflags_erase}");
00414     if (ia->qva_flags & VERIFY_DIGEST)
00415         vsflags |= _RPMVSF_NODIGESTS;
00416     if (ia->qva_flags & VERIFY_SIGNATURE)
00417         vsflags |= _RPMVSF_NOSIGNATURES;
00418     if (ia->qva_flags & VERIFY_HDRCHK)
00419         vsflags |= RPMVSF_NOHDRCHK;
00420     vsflags |= RPMVSF_NEEDPAYLOAD;      /* XXX no legacy signatures */
00421     ovsflags = rpmtsSetVSFlags(ts, vsflags);
00422 
00423     (void) rpmtsSetFlags(ts, transFlags);
00424     (void) rpmtsSetDFlags(ts, depFlags);
00425 
00426     /*  Make the transaction a rollback transaction.  In a rollback
00427      *  a best effort is what we want 
00428      */
00429     rpmtsSetType(ts, RPMTRANS_TYPE_ROLLBACK);
00430 
00431     itids = IDTXload(ts, RPMTAG_INSTALLTID, ia->rbtid);
00432     if (itids != NULL) {
00433         ip = itids->idt;
00434         niids = itids->nidt;
00435     } else {
00436         ip = NULL;
00437         niids = 0;
00438     }
00439 
00440     {   const char * globstr = rpmExpand("%{_repackage_dir}/*/*.rpm", NULL);
00441         if (globstr == NULL || *globstr == '%') {
00442             globstr = _free(globstr);
00443             rc = -1;
00444             goto exit;
00445         }
00446         rtids = IDTXglob(ts, globstr, RPMTAG_REMOVETID, ia->rbtid);
00447 
00448         if (rtids != NULL) {
00449             rp = rtids->idt;
00450             nrids = rtids->nidt;
00451         } else {
00452             rp = NULL;
00453             nrids = 0;
00454         }
00455         globstr = _free(globstr);
00456     }
00457 
00458     {   int notifyFlags;
00459         notifyFlags = ia->installInterfaceFlags | (rpmIsVerbose() ? INSTALL_LABEL : 0 );
00460         xx = rpmtsSetNotifyCallback(ts,
00461                         rpmShowProgress, (void *) ((long)notifyFlags));
00462     }
00463 
00464     /* Run transactions until rollback goal is achieved. */
00465     do {
00466         prevtid = thistid;
00467         rc = 0;
00468         rpmcliPackagesTotal = 0;
00469         numAdded = 0;
00470         numRemoved = 0;
00471         ia->installInterfaceFlags &= ~ifmask;
00472 
00473         /* Find larger of the remaining install/erase transaction id's. */
00474         thistid = 0;
00475         if (ip != NULL && ip->val.u32 > thistid)
00476             thistid = ip->val.u32;
00477         if (rp != NULL && rp->val.u32 > thistid)
00478             thistid = rp->val.u32;
00479 
00480         /* If we've achieved the rollback goal, then we're done. */
00481         if (thistid == 0 || thistid < ia->rbtid)
00482             break;
00483 
00484         /* If we've reached the (configured) rollback goal, then we're done. */
00485         if (_unsafe_rollbacks && thistid <= _unsafe_rollbacks)
00486             break;
00487 
00488         /* Is this transaction excluded from the rollback? */
00489         if (ia->rbtidExcludes != NULL && ia->numrbtidExcludes > 0)
00490         {
00491             uint32_t *excludedTID;
00492             int excluded = 0;
00493             for(excludedTID = ia->rbtidExcludes; 
00494                 excludedTID < ia->rbtidExcludes + ia->numrbtidExcludes;
00495                 excludedTID++) {
00496                 if (thistid == *excludedTID) {
00497                     time_t ttid = (time_t)thistid;
00498                     rpmlog(RPMLOG_NOTICE,
00499                         _("Excluding TID from rollback: %-24.24s (0x%08x)\n"),
00500                                 ctime(&ttid), thistid);
00501                     excluded = 1;
00502                     /*@innerbreak@*/ break;     
00503                 }
00504             }   
00505             if (excluded) {
00506                 /* Iterate over repackaged packages */
00507                 while (rp != NULL && rp->val.u32 == thistid) {
00508                     /* Go to the next repackaged package */
00509                     nrids--;
00510                     if (nrids > 0)
00511                         rp++;
00512                     else
00513                         rp = NULL;
00514                 }
00515                 /* Iterate over installed packages */
00516                 while (ip != NULL && ip->val.u32 == thistid) {
00517                     /* Go to the next header in the rpmdb */
00518                     niids--;
00519                     if (niids > 0)
00520                         ip++;
00521                     else
00522                         ip = NULL;
00523                 }
00524                 continue;               /* with next transaction */
00525             }
00526         }
00527 
00528         rpmtsEmpty(ts);
00529         (void) rpmtsSetFlags(ts, transFlags);
00530         (void) rpmtsSetDFlags(ts, depFlags);
00531         ts->probs = rpmpsFree(ts->probs);
00532         ts->probs = rpmpsCreate();
00533 
00534         /* Install the previously erased packages for this transaction. 
00535          */
00536         while (rp != NULL && rp->val.u32 == thistid) {
00537             if (!rp->done) {
00538                 rpmlog(RPMLOG_DEBUG, D_("\t+++ install %s\n"),
00539                         (rp->key ? rp->key : "???"));
00540 
00541 /*@-abstract@*/
00542                 rc = rpmtsAddInstallElement(ts, rp->h, (fnpyKey)rp->key,
00543                                0, ia->relocations);
00544 /*@=abstract@*/
00545                 if (rc != 0)
00546                     goto exit;
00547 
00548                 numAdded++;
00549                 rpmcliPackagesTotal++;
00550                 if (!(ia->installInterfaceFlags & ifmask))
00551                     ia->installInterfaceFlags |= INSTALL_UPGRADE;
00552 
00553                 /* Re-add linked (i.e. from upgrade/obsoletes) erasures. */
00554                 rc = findErases(ts, ts->teInstall, thistid, ip, niids);
00555                 if (rc < 0)
00556                     goto exit;
00557 #ifdef  NOTYET
00558                 rp->h = headerFree(rp->h);
00559 #endif
00560                 rp->done = 1;
00561             }
00562 
00563             /* Go to the next repackaged package */
00564             nrids--;
00565             if (nrids > 0)
00566                 rp++;
00567             else
00568                 rp = NULL;
00569         }
00570 
00571         /* Re-add pure (i.e. not from upgrade/obsoletes) erasures. */
00572         rc = findErases(ts, NULL, thistid, ip, niids);
00573         if (rc < 0)
00574             goto exit;
00575 
00576         /* Check that all erasures have been re-added. */
00577         while (ip != NULL && ip->val.u32 == thistid) {
00578 #ifdef  NOTNOW
00579 /* XXX Prevent incomplete rollback transactions. */
00580 assert(ip->done || ia->no_rollback_links);
00581 #endif
00582             if (!(ip->done || ia->no_rollback_links)) {
00583                 numRemoved++;
00584 
00585                 if (_unsafe_rollbacks)
00586                     rpmcliPackagesTotal++;
00587 
00588                 if (!(ia->installInterfaceFlags & ifmask))
00589                     ia->installInterfaceFlags |= INSTALL_ERASE;
00590             }
00591 
00592             /* Go to the next header in the rpmdb */
00593             niids--;
00594             if (niids > 0)
00595                 ip++;
00596             else
00597                 ip = NULL;
00598         }
00599 
00600         /* Print any rollback transaction problems */
00601         xx = rpmcliInstallProblems(ts, _("Missing re-packaged package(s)"), 1);
00602 
00603         /* Anything to do? */
00604         if (rpmcliPackagesTotal <= 0)
00605             break;
00606 
00607         tid = (time_t)thistid;
00608         rpmlog(RPMLOG_NOTICE,
00609                 _("Rollback packages (+%d/-%d) to %-24.24s (0x%08x):\n"),
00610                         numAdded, numRemoved, ctime(&tid), thistid);
00611 
00612         rc = (ia->rbCheck ? (*ia->rbCheck) (ts) : 0);
00613         if (rc != 0)
00614             goto exit;
00615 
00616         rc = (ia->rbOrder ? (*ia->rbOrder) (ts) : 0);
00617         if (rc != 0)
00618             goto exit;
00619 
00620         /* Drop added/available package indices and dependency sets. */
00621         rpmtsClean(ts);
00622 
00623         /* Print the transaction set. */
00624         xx = rpmtsPrint(ts, stdout);
00625 
00626         rc = (ia->rbRun
00627             ? (*ia->rbRun)(ts, NULL, (ia->probFilter|RPMPROB_FILTER_OLDPACKAGE))
00628             : 0);
00629         if (rc != 0)
00630             goto exit;
00631 
00632         /* Remove repackaged packages after successful reinstall. */
00633         if (rtids && !rpmIsDebug()) {
00634             int i;
00635             rpmlog(RPMLOG_NOTICE, _("Cleaning up repackaged packages:\n"));
00636             if (rtids->idt)
00637             for (i = 0; i < rtids->nidt; i++) {
00638                 IDT rrp = rtids->idt + i;
00639                 if (rrp->val.u32 != thistid)
00640                     /*@innercontinue@*/ continue;
00641                 if (rrp->key) { /* XXX can't happen */
00642                     rpmlog(RPMLOG_NOTICE, _("\tRemoving %s:\n"), rrp->key);
00643                     (void) unlink(rrp->key);    /* XXX: Should check rc??? */
00644                 }
00645             }
00646         }
00647 
00648         /* The rpmdb has changed, so reload installed package chains. */
00649         itids = IDTXfree(itids);
00650         itids = IDTXload(ts, RPMTAG_INSTALLTID, ia->rbtid);
00651         if (itids != NULL) {
00652             ip = itids->idt;
00653             niids = itids->nidt;
00654         } else {
00655             ip = NULL;
00656             niids = 0;
00657         }
00658 
00659         /* Re-position the iterator at the current install tid. */
00660         while (ip != NULL && ip->val.u32 == thistid) {
00661             /* Go to the next header in the rpmdb */
00662             niids--;
00663             if (niids > 0)
00664                 ip++;
00665             else
00666                 ip = NULL;
00667         }
00668 
00669     } while (1);
00670 
00671 exit:
00672     rtids = IDTXfree(rtids);
00673     itids = IDTXfree(itids);
00674 
00675     rpmtsEmpty(ts);
00676     (void) rpmtsSetFlags(ts, transFlags);
00677     (void) rpmtsSetDFlags(ts, depFlags);
00678 
00679     return rc;
00680 }

Generated on Mon Nov 29 2010 05:18:44 for rpm by  doxygen 1.7.2