factor out {prepare,lock,save,load}_state()
This commit is contained in:
Oswald Buddenhagen
parent
5af1796777
commit
97a42cd825
295
src/sync.c
295
src/sync.c
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@ -154,7 +154,7 @@ typedef struct {
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store_t *ctx[2];
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driver_t *drv[2];
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const char *orig_name[2];
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int state[2], ref_count, nsrecs, ret, lfd;
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int state[2], ref_count, nsrecs, ret, lfd, existing, replayed;
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int new_total[2], new_done[2];
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int flags_total[2], flags_done[2];
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int trash_total[2], trash_done[2];
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@ -467,7 +467,6 @@ stats( sync_vars_t *svars )
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static void sync_bail( sync_vars_t *svars );
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static void sync_bail1( sync_vars_t *svars );
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static void sync_bail2( sync_vars_t *svars );
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static void sync_bail3( sync_vars_t *svars );
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static void cancel_done( void *aux );
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@ -580,91 +579,19 @@ clean_strdup( const char *s )
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#define JOURNAL_VERSION "2"
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static void box_selected( int sts, void *aux );
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void
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sync_boxes( store_t *ctx[], const char *names[], channel_conf_t *chan,
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void (*cb)( int sts, void *aux ), void *aux )
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static int
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prepare_state( sync_vars_t *svars )
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{
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sync_vars_t *svars;
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int t;
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svars = nfcalloc( sizeof(*svars) );
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svars->t[1] = 1;
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svars->ref_count = 1;
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svars->cb = cb;
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svars->aux = aux;
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svars->ctx[0] = ctx[0];
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svars->ctx[1] = ctx[1];
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svars->chan = chan;
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svars->uidval[0] = svars->uidval[1] = -1;
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svars->srecadd = &svars->srecs;
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for (t = 0; t < 2; t++) {
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svars->orig_name[t] =
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(!names[t] || (ctx[t]->conf->map_inbox && !strcmp( ctx[t]->conf->map_inbox, names[t] ))) ?
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"INBOX" : names[t];
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if (!ctx[t]->conf->flat_delim) {
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svars->box_name[t] = nfstrdup( svars->orig_name[t] );
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} else if (map_name( svars->orig_name[t], &svars->box_name[t], 0, "/", ctx[t]->conf->flat_delim ) < 0) {
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error( "Error: canonical mailbox name '%s' contains flattened hierarchy delimiter\n", svars->orig_name[t] );
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svars->ret = SYNC_FAIL;
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sync_bail3( svars );
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return;
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}
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ctx[t]->uidvalidity = -1;
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set_bad_callback( ctx[t], store_bad, AUX );
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svars->drv[t] = ctx[t]->conf->driver;
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}
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/* Both boxes must be fully set up at this point, so that error exit paths
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* don't run into uninitialized variables. */
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sync_ref( svars );
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for (t = 0; t < 2; t++) {
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info( "Selecting %s %s...\n", str_ms[t], svars->orig_name[t] );
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svars->drv[t]->select_box( ctx[t], svars->box_name[t], (chan->ops[t] & OP_CREATE) != 0, box_selected, AUX );
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if (check_cancel( svars ))
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break;
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}
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sync_deref( svars );
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}
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static void load_box( sync_vars_t *svars, int t, int minwuid, int *mexcs, int nmexcs );
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static void
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box_selected( int sts, void *aux )
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{
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DECL_SVARS;
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sync_rec_t *srec, *nsrec;
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char *s, *cmname, *csname;
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store_t *ctx[2];
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channel_conf_t *chan;
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FILE *jfp;
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int opts[2], line, t1, t2, t3;
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int *mexcs, nmexcs, rmexcs, minwuid;
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struct stat st;
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struct flock lck;
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char fbuf[16]; /* enlarge when support for keywords is added */
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char buf[128], buf1[64], buf2[64];
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if (check_ret( sts, aux ))
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return;
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INIT_SVARS(aux);
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ctx[0] = svars->ctx[0];
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ctx[1] = svars->ctx[1];
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svars->state[t] |= ST_SELECTED;
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if (!(svars->state[1-t] & ST_SELECTED))
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return;
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chan = svars->chan;
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if (!strcmp( chan->sync_state ? chan->sync_state : global_conf.sync_state, "*" )) {
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if (!ctx[S]->path) {
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if (!svars->ctx[S]->path) {
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error( "Error: store '%s' does not support in-box sync state\n", chan->stores[S]->name );
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sbail:
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svars->ret = SYNC_FAIL;
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sync_bail2( svars );
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return;
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return 0;
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}
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nfasprintf( &svars->dname, "%s/." EXE "state", ctx[S]->path );
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nfasprintf( &svars->dname, "%s/." EXE "state", svars->ctx[S]->path );
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} else {
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csname = clean_strdup( svars->box_name[S] );
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if (chan->sync_state)
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@ -679,18 +606,26 @@ box_selected( int sts, void *aux )
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free( csname );
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if (!(s = strrchr( svars->dname, '/' ))) {
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error( "Error: invalid SyncState location '%s'\n", svars->dname );
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goto sbail;
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return 0;
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}
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*s = 0;
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if (mkdir( svars->dname, 0700 ) && errno != EEXIST) {
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sys_error( "Error: cannot create SyncState directory '%s'", svars->dname );
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goto sbail;
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return 0;
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}
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*s = '/';
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}
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nfasprintf( &svars->jname, "%s.journal", svars->dname );
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nfasprintf( &svars->nname, "%s.new", svars->dname );
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nfasprintf( &svars->lname, "%s.lock", svars->dname );
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return 1;
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}
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static int
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lock_state( sync_vars_t *svars )
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{
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struct flock lck;
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memset( &lck, 0, sizeof(lck) );
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#if SEEK_SET != 0
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lck.l_whence = SEEK_SET;
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@ -700,17 +635,59 @@ box_selected( int sts, void *aux )
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#endif
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if ((svars->lfd = open( svars->lname, O_WRONLY|O_CREAT, 0666 )) < 0) {
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sys_error( "Error: cannot create lock file %s", svars->lname );
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svars->ret = SYNC_FAIL;
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sync_bail2( svars );
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return;
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return 0;
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}
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if (fcntl( svars->lfd, F_SETLK, &lck )) {
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error( "Error: channel :%s:%s-:%s:%s is locked\n",
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chan->stores[M]->name, svars->orig_name[M], chan->stores[S]->name, svars->orig_name[S] );
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svars->ret = SYNC_FAIL;
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sync_bail1( svars );
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return;
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svars->chan->stores[M]->name, svars->orig_name[M], svars->chan->stores[S]->name, svars->orig_name[S] );
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close( svars->lfd );
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return 0;
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}
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return 1;
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}
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static void
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save_state( sync_vars_t *svars )
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{
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sync_rec_t *srec;
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char fbuf[16]; /* enlarge when support for keywords is added */
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Fprintf( svars->nfp,
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"MasterUidValidity %d\nSlaveUidValidity %d\nMaxPulledUid %d\nMaxPushedUid %d\n",
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svars->uidval[M], svars->uidval[S], svars->maxuid[M], svars->maxuid[S] );
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if (svars->smaxxuid)
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Fprintf( svars->nfp, "MaxExpiredSlaveUid %d\n", svars->smaxxuid );
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Fprintf( svars->nfp, "\n" );
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for (srec = svars->srecs; srec; srec = srec->next) {
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if (srec->status & S_DEAD)
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continue;
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make_flags( srec->flags, fbuf );
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Fprintf( svars->nfp, "%d %d %s%s\n", srec->uid[M], srec->uid[S],
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srec->status & S_EXPIRED ? "X" : "", fbuf );
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}
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Fclose( svars->nfp, 1 );
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Fclose( svars->jfp, 0 );
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if (!(DFlags & KEEPJOURNAL)) {
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/* order is important! */
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if (rename( svars->nname, svars->dname ))
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warn( "Warning: cannot commit sync state %s\n", svars->dname );
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else if (unlink( svars->jname ))
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warn( "Warning: cannot delete journal %s\n", svars->jname );
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}
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}
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static int
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load_state( sync_vars_t *svars )
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{
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sync_rec_t *srec, *nsrec;
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char *s;
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FILE *jfp;
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int line, t, t1, t2, t3;
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struct stat st;
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char fbuf[16]; /* enlarge when support for keywords is added */
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char buf[128], buf1[64], buf2[64];
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if ((jfp = fopen( svars->dname, "r" ))) {
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debug( "reading sync state %s ...\n", svars->dname );
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line = 0;
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@ -720,10 +697,7 @@ box_selected( int sts, void *aux )
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error( "Error: incomplete sync state header entry at %s:%d\n", svars->dname, line );
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jbail:
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fclose( jfp );
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bail:
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svars->ret = SYNC_FAIL;
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sync_bail( svars );
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return;
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return 0;
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}
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if (t == 1)
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goto gothdr;
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@ -788,11 +762,13 @@ box_selected( int sts, void *aux )
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svars->nsrecs++;
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}
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fclose( jfp );
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svars->existing = 1;
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} else {
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if (errno != ENOENT) {
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sys_error( "Error: cannot read sync state %s", svars->dname );
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goto bail;
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return 0;
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}
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svars->existing = 0;
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}
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svars->newmaxuid[M] = svars->maxuid[M];
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svars->newmaxuid[S] = svars->maxuid[S];
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@ -936,19 +912,107 @@ box_selected( int sts, void *aux )
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} else {
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if (errno != ENOENT) {
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sys_error( "Error: cannot read journal %s", svars->jname );
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goto bail;
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return 0;
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}
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}
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svars->replayed = line;
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return 1;
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}
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static void box_selected( int sts, void *aux );
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void
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sync_boxes( store_t *ctx[], const char *names[], channel_conf_t *chan,
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void (*cb)( int sts, void *aux ), void *aux )
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{
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sync_vars_t *svars;
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int t;
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svars = nfcalloc( sizeof(*svars) );
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svars->t[1] = 1;
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svars->ref_count = 1;
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svars->cb = cb;
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svars->aux = aux;
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svars->ctx[0] = ctx[0];
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svars->ctx[1] = ctx[1];
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svars->chan = chan;
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svars->uidval[0] = svars->uidval[1] = -1;
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svars->srecadd = &svars->srecs;
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for (t = 0; t < 2; t++) {
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svars->orig_name[t] =
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(!names[t] || (ctx[t]->conf->map_inbox && !strcmp( ctx[t]->conf->map_inbox, names[t] ))) ?
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"INBOX" : names[t];
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if (!ctx[t]->conf->flat_delim) {
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svars->box_name[t] = nfstrdup( svars->orig_name[t] );
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} else if (map_name( svars->orig_name[t], &svars->box_name[t], 0, "/", ctx[t]->conf->flat_delim ) < 0) {
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error( "Error: canonical mailbox name '%s' contains flattened hierarchy delimiter\n", svars->orig_name[t] );
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svars->ret = SYNC_FAIL;
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sync_bail3( svars );
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return;
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}
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ctx[t]->uidvalidity = -1;
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set_bad_callback( ctx[t], store_bad, AUX );
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svars->drv[t] = ctx[t]->conf->driver;
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}
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/* Both boxes must be fully set up at this point, so that error exit paths
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* don't run into uninitialized variables. */
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sync_ref( svars );
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for (t = 0; t < 2; t++) {
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info( "Selecting %s %s...\n", str_ms[t], svars->orig_name[t] );
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svars->drv[t]->select_box( ctx[t], svars->box_name[t], (chan->ops[t] & OP_CREATE) != 0, box_selected, AUX );
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if (check_cancel( svars ))
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break;
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}
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sync_deref( svars );
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}
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static void load_box( sync_vars_t *svars, int t, int minwuid, int *mexcs, int nmexcs );
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static void
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box_selected( int sts, void *aux )
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{
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DECL_SVARS;
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sync_rec_t *srec;
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store_t *ctx[2];
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channel_conf_t *chan;
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int opts[2], fails;
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int *mexcs, nmexcs, rmexcs, minwuid;
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if (check_ret( sts, aux ))
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return;
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INIT_SVARS(aux);
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ctx[0] = svars->ctx[0];
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ctx[1] = svars->ctx[1];
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chan = svars->chan;
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svars->state[t] |= ST_SELECTED;
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if (!(svars->state[1-t] & ST_SELECTED))
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return;
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if (!prepare_state( svars ) || !lock_state( svars )) {
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svars->ret = SYNC_FAIL;
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sync_bail2( svars );
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return;
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}
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if (!load_state( svars )) {
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svars->ret = SYNC_FAIL;
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sync_bail( svars );
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return;
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}
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t1 = 0;
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fails = 0;
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for (t = 0; t < 2; t++)
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if (svars->uidval[t] >= 0 && svars->uidval[t] != ctx[t]->uidvalidity) {
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error( "Error: UIDVALIDITY of %s changed (got %d, expected %d)\n",
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str_ms[t], ctx[t]->uidvalidity, svars->uidval[t] );
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t1++;
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fails++;
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}
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if (fails) {
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bail:
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svars->ret = SYNC_FAIL;
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sync_bail( svars );
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return;
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}
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if (t1)
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goto bail;
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if (!(svars->nfp = fopen( svars->nname, "w" ))) {
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sys_error( "Error: cannot create new sync state %s", svars->nname );
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@ -960,7 +1024,7 @@ box_selected( int sts, void *aux )
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goto bail;
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}
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setlinebuf( svars->jfp );
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if (!line)
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if (!svars->replayed)
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Fprintf( svars->jfp, JOURNAL_VERSION "\n" );
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opts[M] = opts[S] = 0;
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@ -994,7 +1058,7 @@ box_selected( int sts, void *aux )
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}
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if ((chan->ops[S] & (OP_NEW|OP_RENEW|OP_FLAGS)) && chan->max_messages)
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opts[S] |= OPEN_OLD|OPEN_NEW|OPEN_FLAGS;
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if (line)
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if (svars->replayed)
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for (srec = svars->srecs; srec; srec = srec->next) {
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if (srec->status & S_DEAD)
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continue;
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@ -1816,7 +1880,6 @@ box_closed_p2( sync_vars_t *svars, int t )
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{
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sync_rec_t *srec;
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int minwuid;
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char fbuf[16]; /* enlarge when support for keywords is added */
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svars->state[t] |= ST_CLOSED;
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if (!(svars->state[1-t] & ST_CLOSED))
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@ -1861,29 +1924,7 @@ box_closed_p2( sync_vars_t *svars, int t )
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}
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}
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Fprintf( svars->nfp,
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"MasterUidValidity %d\nSlaveUidValidity %d\nMaxPulledUid %d\nMaxPushedUid %d\n",
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svars->uidval[M], svars->uidval[S], svars->maxuid[M], svars->maxuid[S] );
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if (svars->smaxxuid)
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Fprintf( svars->nfp, "MaxExpiredSlaveUid %d\n", svars->smaxxuid );
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Fprintf( svars->nfp, "\n" );
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for (srec = svars->srecs; srec; srec = srec->next) {
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if (srec->status & S_DEAD)
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continue;
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make_flags( srec->flags, fbuf );
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Fprintf( svars->nfp, "%d %d %s%s\n", srec->uid[M], srec->uid[S],
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srec->status & S_EXPIRED ? "X" : "", fbuf );
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}
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Fclose( svars->nfp, 1 );
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Fclose( svars->jfp, 0 );
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if (!(DFlags & KEEPJOURNAL)) {
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/* order is important! */
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if (rename( svars->nname, svars->dname ))
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warn( "Warning: cannot commit sync state %s\n", svars->dname );
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else if (unlink( svars->jname ))
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warn( "Warning: cannot delete journal %s\n", svars->jname );
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}
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save_state( svars );
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sync_bail( svars );
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}
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@ -1898,12 +1939,6 @@ sync_bail( sync_vars_t *svars )
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free( srec );
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}
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unlink( svars->lname );
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sync_bail1( svars );
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||||
}
|
||||
|
||||
static void
|
||||
sync_bail1( sync_vars_t *svars )
|
||||
{
|
||||
close( svars->lfd );
|
||||
sync_bail2( svars );
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user