cope with out-of-disk-space halfways gracefully (that is, don't clobber
the sync state including the journal, but exit immediately).
This commit is contained in:
parent
556dfabc38
commit
c2209c8470
90
src/sync.c
90
src/sync.c
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@ -33,6 +33,22 @@
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#include <errno.h>
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#include <sys/stat.h>
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void
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Fprintf( FILE *f, const char *msg, ... )
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{
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int r;
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va_list va;
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va_start( va, msg );
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r = vfprintf( f, msg, va );
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va_end( va );
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if (r < 0) {
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perror( "cannot write file" );
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exit( 1 );
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}
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}
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static const char Flags[] = { 'D', 'F', 'R', 'S', 'T' };
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static int
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@ -256,10 +272,10 @@ sync_old( int tops, store_t *sctx, store_t *tctx, store_conf_t *tconf, FILE *jfp
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default: /* ok */ break;
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case DRV_OK:
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if (pull) {
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fprintf( jfp, "< %d %d 0\n", srec->muid, srec->suid );
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Fprintf( jfp, "< %d %d 0\n", srec->muid, srec->suid );
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srec->muid = 0;
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} else {
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fprintf( jfp, "> %d %d 0\n", srec->muid, srec->suid );
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Fprintf( jfp, "> %d %d 0\n", srec->muid, srec->suid );
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srec->suid = 0;
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}
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}
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@ -290,10 +306,10 @@ sync_old( int tops, store_t *sctx, store_t *tctx, store_conf_t *tconf, FILE *jfp
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case DRV_OK:
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if (pull) {
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srec->suid = uid;
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fprintf( jfp, "> %d -1 %d\n", srec->muid, srec->suid );
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Fprintf( jfp, "> %d -1 %d\n", srec->muid, srec->suid );
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} else {
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srec->muid = uid;
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fprintf( jfp, "< -1 %d %d\n", srec->suid, srec->muid );
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Fprintf( jfp, "< -1 %d %d\n", srec->suid, srec->muid );
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}
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*nflags = smsg->flags;
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}
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@ -344,7 +360,7 @@ sync_old( int tops, store_t *sctx, store_t *tctx, store_conf_t *tconf, FILE *jfp
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if (unex) {
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debug( "unexpiring pair(%d,%d)\n", srec->muid, srec->suid );
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/* log last, so deletion can't be misinterpreted! */
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fprintf( jfp, "~ %d %d 0\n", srec->muid, srec->suid );
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Fprintf( jfp, "~ %d %d 0\n", srec->muid, srec->suid );
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srec->status &= ~S_EXPIRED;
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}
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}
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@ -407,10 +423,10 @@ sync_new( int tops, store_t *sctx, store_t *tctx, store_conf_t *tconf, FILE *jfp
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srec->next = 0;
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**srecadd = srec;
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*srecadd = &srec->next;
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fprintf( jfp, "+ %d %d %u\n", srec->muid, srec->suid, srec->flags );
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Fprintf( jfp, "+ %d %d %u\n", srec->muid, srec->suid, srec->flags );
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if (*smaxuid < msg->uid) {
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*smaxuid = msg->uid;
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fprintf( jfp, pull ? "( %d\n" : ") %d\n", msg->uid );
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Fprintf( jfp, pull ? "( %d\n" : ") %d\n", msg->uid );
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}
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}
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} else
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@ -522,7 +538,13 @@ sync_boxes( store_t *mctx, const char *mname,
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}
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if ((dfp = fopen( dname, "r" ))) {
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debug( "reading sync state %s ...\n", dname );
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if (fscanf( dfp, "%d:%d %d:%d:%d\n", &muidval, &mmaxuid, &suidval, &smaxxuid, &smaxuid) != 5) {
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if (!fgets( buf, sizeof(buf), dfp ) || !(i = strlen( buf )) || buf[i - 1] != '\n') {
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fprintf( stderr, "Error: incomplete sync state header in %s\n", dname );
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fclose( dfp );
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ret = SYNC_FAIL;
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goto bail;
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}
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if (sscanf( buf, "%d:%d %d:%d:%d", &muidval, &mmaxuid, &suidval, &smaxxuid, &smaxuid) != 5) {
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fprintf( stderr, "Error: invalid sync state header in %s\n", dname );
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fclose( dfp );
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ret = SYNC_FAIL;
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line = 1;
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while (fgets( buf, sizeof(buf), dfp )) {
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line++;
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if (!(i = strlen( buf )) || buf[i - 1] != '\n') {
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fprintf( stderr, "Error: incomplete sync state entry at %s:%d\n", dname, line );
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fclose( dfp );
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ret = SYNC_FAIL;
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goto bail;
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}
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fbuf[0] = 0;
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if (sscanf( buf, "%d %d %15s\n", &t1, &t2, fbuf ) < 2) {
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if (sscanf( buf, "%d %d %15s", &t1, &t2, fbuf ) < 2) {
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fprintf( stderr, "Error: invalid sync state entry at %s:%d\n", dname, line );
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fclose( dfp );
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ret = SYNC_FAIL;
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srec = recs;
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while (fgets( buf, sizeof(buf), jfp )) {
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line++;
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if (!(i = strlen( buf )) || buf[i - 1] != '\n') {
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fprintf( stderr, "Error: incomplete journal entry at %s:%d\n", jname, line );
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fclose( jfp );
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ret = SYNC_FAIL;
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goto bail;
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}
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if (buf[0] == '^')
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srec = recs;
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else {
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if (buf[0] == '(' || buf[0] == ')' ?
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(sscanf( buf + 2, "%d\n", &t1 ) != 1) :
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(sscanf( buf + 2, "%d", &t1 ) != 1) :
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buf[0] == '-' || buf[0] == '|' ?
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(sscanf( buf + 2, "%d %d\n", &t1, &t2 ) != 2) :
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(sscanf( buf + 2, "%d %d %d\n", &t1, &t2, &t3 ) != 3))
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(sscanf( buf + 2, "%d %d", &t1, &t2 ) != 2) :
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(sscanf( buf + 2, "%d %d %d", &t1, &t2, &t3 ) != 3))
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{
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fprintf( stderr, "Error: malformed journal entry at %s:%d\n", jname, line );
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fclose( jfp );
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minwuid = srec->muid;
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}
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debug( " min non-orphaned master uid is %d\n", minwuid );
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fprintf( jfp, "^\n" ); /* if any S_EXP_SLAVE */
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Fprintf( jfp, "^\n" ); /* if any S_EXP_SLAVE */
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for (srec = recs; srec; srec = srec->next) {
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if (srec->status & S_DEAD)
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continue;
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if (minwuid > srec->muid && mmaxuid >= srec->muid) {
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debug( " -> killing (%d,%d)\n", srec->muid, srec->suid );
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srec->status = S_DEAD;
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fprintf( jfp, "- %d %d\n", srec->muid, srec->suid );
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Fprintf( jfp, "- %d %d\n", srec->muid, srec->suid );
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} else if (srec->suid) {
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debug( " -> orphaning (%d,[%d])\n", srec->muid, srec->suid );
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fprintf( jfp, "> %d %d 0\n", srec->muid, srec->suid );
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Fprintf( jfp, "> %d %d 0\n", srec->muid, srec->suid );
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srec->suid = 0;
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}
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} else if (minwuid > srec->muid) {
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if (mmaxuid >= srec->muid) {
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debug( " -> killing (%d,%d)\n", srec->muid, srec->suid );
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srec->status = S_DEAD;
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fprintf( jfp, "- %d %d\n", srec->muid, srec->suid );
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Fprintf( jfp, "- %d %d\n", srec->muid, srec->suid );
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}
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} else if (srec->muid > 0 && srec->suid && (mctx->opts & OPEN_OLD) &&
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(!(mctx->opts & OPEN_NEW) || mmaxuid >= srec->muid)) {
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if (!muidval || !suidval) {
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muidval = mctx->uidvalidity;
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suidval = sctx->uidvalidity;
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fprintf( jfp, "| %d %d\n", muidval, suidval );
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Fprintf( jfp, "| %d %d\n", muidval, suidval );
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}
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info( "Synchronizing\n" );
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debug( "synchronizing old entries\n" );
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fprintf( jfp, "^\n" );
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Fprintf( jfp, "^\n" );
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for (srec = recs; srec; srec = srec->next) {
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if (srec->status & S_DEAD)
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continue;
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debug( " vanished\n" );
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/* d.1) d.5) d.6) d.10) d.11) */
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srec->status = S_DEAD;
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fprintf( jfp, "- %d %d\n", srec->muid, srec->suid );
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Fprintf( jfp, "- %d %d\n", srec->muid, srec->suid );
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} else {
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delm = nom && (srec->muid > 0);
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dels = nos && (srec->suid > 0);
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if (srec->flags != nflags) {
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debug( " updating flags (%u -> %u)\n", srec->flags, nflags );
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srec->flags = nflags;
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fprintf( jfp, "* %d %d %u\n", srec->muid, srec->suid, nflags );
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Fprintf( jfp, "* %d %d %u\n", srec->muid, srec->suid, nflags );
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}
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if (mmsg && (mmsg->flags & F_DELETED))
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srec->status |= S_DEL_MASTER;
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}
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}
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if (delt) {
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fprintf( jfp, "^\n" );
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Fprintf( jfp, "^\n" );
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for (srec = recs; srec; srec = srec->next) {
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if (srec->status & (S_DEAD|S_EXPIRED))
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continue;
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if (smsg && (smsg->status & M_EXPIRED)) {
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debug( " expiring pair(%d,%d)\n", srec->muid, srec->suid );
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/* log first, so deletion can't be misinterpreted! */
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fprintf( jfp, "~ %d %d 1\n", srec->muid, srec->suid );
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Fprintf( jfp, "~ %d %d 1\n", srec->muid, srec->suid );
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if (smaxxuid < srec->suid)
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smaxxuid = srec->suid;
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srec->status |= S_EXPIRED;
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debug( " min non-orphaned master uid is %d\n", minwuid );
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}
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fprintf( jfp, "^\n" );
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Fprintf( jfp, "^\n" );
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for (srec = recs; srec; srec = srec->next) {
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if (srec->status & S_DEAD)
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continue;
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if (srec->muid <= 0 || ((srec->status & S_DEL_MASTER) && mex)) {
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debug( " -> killing (%d,%d)\n", srec->muid, srec->suid );
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srec->status = S_DEAD;
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fprintf( jfp, "- %d %d\n", srec->muid, srec->suid );
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Fprintf( jfp, "- %d %d\n", srec->muid, srec->suid );
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} else if (srec->status & S_EXPIRED) {
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if (mmaxuid >= srec->muid && minwuid > srec->muid) {
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debug( " -> killing (%d,%d)\n", srec->muid, srec->suid );
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srec->status = S_DEAD;
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fprintf( jfp, "- %d %d\n", srec->muid, srec->suid );
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Fprintf( jfp, "- %d %d\n", srec->muid, srec->suid );
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} else if (srec->suid) {
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debug( " -> orphaning (%d,[%d])\n", srec->muid, srec->suid );
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fprintf( jfp, "> %d %d 0\n", srec->muid, srec->suid );
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Fprintf( jfp, "> %d %d 0\n", srec->muid, srec->suid );
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srec->suid = 0;
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}
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}
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@ -939,12 +973,12 @@ sync_boxes( store_t *mctx, const char *mname,
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}
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finish:
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fprintf( nfp, "%d:%d %d:%d:%d\n", muidval, mmaxuid, suidval, smaxxuid, smaxuid );
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Fprintf( nfp, "%d:%d %d:%d:%d\n", muidval, mmaxuid, suidval, smaxxuid, smaxuid );
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for (srec = recs; 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( nfp, "%d %d %s%s\n", srec->muid, srec->suid,
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Fprintf( nfp, "%d %d %s%s\n", srec->muid, srec->suid,
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srec->status & S_EXPIRED ? "X" : "", fbuf );
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}
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