mirror of https://git.code.sf.net/p/isync/isync
Browse Source
while moving the code, localize some variables, and use C99 comments.wip/maildir-path-under-inbox
Oswald Buddenhagen
3 years ago
4 changed files with 665 additions and 645 deletions
@ -0,0 +1,93 @@
|
||||
// SPDX-FileCopyrightText: 2002-2022 Oswald Buddenhagen <ossi@users.sf.net>
|
||||
// SPDX-License-Identifier: GPL-2.0-or-later WITH LicenseRef-isync-GPL-exception
|
||||
//
|
||||
// mbsync - mailbox synchronizer
|
||||
//
|
||||
|
||||
#define DEBUG_FLAG DEBUG_SYNC |
||||
|
||||
#include "sync.h" |
||||
|
||||
// This is the (mostly) persistent status of the sync record.
|
||||
// Most of these bits are actually mutually exclusive. It is a
|
||||
// bitfield to allow for easy testing for multiple states.
|
||||
#define S_EXPIRE (1<<0) // the entry is being expired (near side message removal scheduled)
|
||||
#define S_EXPIRED (1<<1) // the entry is expired (near side message removal confirmed)
|
||||
#define S_PENDING (1<<2) // the entry is new and awaits propagation (possibly a retry)
|
||||
#define S_DUMMY(fn) (1<<(3+(fn))) // f/n message is only a placeholder
|
||||
#define S_SKIPPED (1<<5) // pre-1.4 legacy: the entry was not propagated (message is too big)
|
||||
#define S_DEAD (1<<7) // ephemeral: the entry was killed and should be ignored
|
||||
|
||||
// Ephemeral working set.
|
||||
#define W_NEXPIRE (1<<0) // temporary: new expiration state
|
||||
#define W_DELETE (1<<1) // ephemeral: flags propagation is a deletion
|
||||
#define W_DEL(fn) (1<<(2+(fn))) // ephemeral: f/n message would be subject to expunge
|
||||
#define W_UPGRADE (1<<4) // ephemeral: upgrading placeholder, do not apply MaxSize
|
||||
#define W_PURGE (1<<5) // ephemeral: placeholder is being nuked
|
||||
|
||||
typedef struct sync_rec { |
||||
struct sync_rec *next; |
||||
/* string_list_t *keywords; */ |
||||
uint uid[2]; |
||||
message_t *msg[2]; |
||||
uchar status, wstate, flags, pflags, aflags[2], dflags[2]; |
||||
char tuid[TUIDL]; |
||||
} sync_rec_t; |
||||
|
||||
typedef struct { |
||||
int t[2]; |
||||
void (*cb)( int sts, void *aux ), *aux; |
||||
char *dname, *jname, *nname, *lname, *box_name[2]; |
||||
FILE *jfp, *nfp; |
||||
sync_rec_t *srecs, **srecadd; |
||||
channel_conf_t *chan; |
||||
store_t *ctx[2]; |
||||
driver_t *drv[2]; |
||||
const char *orig_name[2]; |
||||
message_t *msgs[2], *new_msgs[2]; |
||||
uint_array_alloc_t trashed_msgs[2]; |
||||
int state[2], lfd, ret, existing, replayed; |
||||
uint ref_count, nsrecs, opts[2]; |
||||
uint new_pending[2], flags_pending[2], trash_pending[2]; |
||||
uint maxuid[2]; // highest UID that was already propagated
|
||||
uint oldmaxuid[2]; // highest UID that was already propagated before this run
|
||||
uint uidval[2]; // UID validity value
|
||||
uint newuidval[2]; // UID validity obtained from driver
|
||||
uint finduid[2]; // TUID lookup makes sense only for UIDs >= this
|
||||
uint maxxfuid; // highest expired UID on far side
|
||||
uint oldmaxxfuid; // highest expired UID on far side before this run
|
||||
uchar good_flags[2], bad_flags[2]; |
||||
} sync_vars_t; |
||||
|
||||
int prepare_state( sync_vars_t *svars ); |
||||
int lock_state( sync_vars_t *svars ); |
||||
int load_state( sync_vars_t *svars ); |
||||
void save_state( sync_vars_t *svars ); |
||||
void delete_state( sync_vars_t *svars ); |
||||
|
||||
void ATTR_PRINTFLIKE(2, 3) jFprintf( sync_vars_t *svars, const char *msg, ... ); |
||||
|
||||
#define JLOG_(log_fmt, log_args, dbg_fmt, ...) \ |
||||
do { \
|
||||
debug( "-> log: " log_fmt " (" dbg_fmt ")\n", __VA_ARGS__ ); \
|
||||
jFprintf( svars, log_fmt "\n", deparen(log_args) ); \
|
||||
} while (0) |
||||
#define JLOG3(log_fmt, log_args, dbg_fmt) \ |
||||
JLOG_(log_fmt, log_args, dbg_fmt, deparen(log_args)) |
||||
#define JLOG4(log_fmt, log_args, dbg_fmt, dbg_args) \ |
||||
JLOG_(log_fmt, log_args, dbg_fmt, deparen(log_args), deparen(dbg_args)) |
||||
#define JLOG_SEL(_1, _2, _3, _4, x, ...) x |
||||
#define JLOG(...) JLOG_SEL(__VA_ARGS__, JLOG4, JLOG3, NO_JLOG2, NO_JLOG1)(__VA_ARGS__) |
||||
|
||||
void assign_uid( sync_vars_t *svars, sync_rec_t *srec, int t, uint uid ); |
||||
|
||||
#define ASSIGN_UID(srec, t, nuid, ...) \ |
||||
do { \
|
||||
JLOG( "%c %u %u %u", ("<>"[t], srec->uid[F], srec->uid[N], nuid), __VA_ARGS__ ); \
|
||||
assign_uid( svars, srec, t, nuid ); \
|
||||
} while (0) |
||||
|
||||
void assign_tuid( sync_vars_t *svars, sync_rec_t *srec ); |
||||
int match_tuids( sync_vars_t *svars, int t, message_t *msgs ); |
||||
|
||||
sync_rec_t *upgrade_srec( sync_vars_t *svars, sync_rec_t *srec ); |
||||
@ -0,0 +1,569 @@
|
||||
// SPDX-FileCopyrightText: 2004-2022 Oswald Buddenhagen <ossi@users.sf.net>
|
||||
// SPDX-License-Identifier: GPL-2.0-or-later WITH LicenseRef-isync-GPL-exception
|
||||
//
|
||||
// mbsync - mailbox synchronizer
|
||||
//
|
||||
|
||||
#define DEBUG_FLAG DEBUG_SYNC |
||||
|
||||
#include "sync_p.h" |
||||
|
||||
#include <fcntl.h> |
||||
#include <ctype.h> |
||||
#include <errno.h> |
||||
#include <sys/stat.h> |
||||
|
||||
#define JOURNAL_VERSION "4" |
||||
|
||||
const char *str_fn[] = { "far side", "near side" }, *str_hl[] = { "push", "pull" }; |
||||
|
||||
static char * |
||||
clean_strdup( const char *s ) |
||||
{ |
||||
char *cs = nfstrdup( s ); |
||||
for (uint i = 0; cs[i]; i++) |
||||
if (cs[i] == '/') |
||||
cs[i] = '!'; |
||||
return cs; |
||||
} |
||||
|
||||
int |
||||
prepare_state( sync_vars_t *svars ) |
||||
{ |
||||
channel_conf_t *chan = svars->chan; |
||||
if (!strcmp( chan->sync_state ? chan->sync_state : global_conf.sync_state, "*" )) { |
||||
const char *path = svars->drv[N]->get_box_path( svars->ctx[N] ); |
||||
if (!path) { |
||||
error( "Error: store '%s' does not support in-box sync state\n", chan->stores[N]->name ); |
||||
return 0; |
||||
} |
||||
nfasprintf( &svars->dname, "%s/." EXE "state", path ); |
||||
} else { |
||||
char *cnname = clean_strdup( svars->box_name[N] ); |
||||
if (chan->sync_state) { |
||||
nfasprintf( &svars->dname, "%s%s", chan->sync_state, cnname ); |
||||
} else { |
||||
char c = FieldDelimiter; |
||||
char *cfname = clean_strdup( svars->box_name[F] ); |
||||
nfasprintf( &svars->dname, "%s%c%s%c%s_%c%s%c%s", global_conf.sync_state, |
||||
c, chan->stores[F]->name, c, cfname, c, chan->stores[N]->name, c, cnname ); |
||||
free( cfname ); |
||||
} |
||||
free( cnname ); |
||||
char *s; |
||||
if (!(s = strrchr( svars->dname, '/' ))) { |
||||
error( "Error: invalid SyncState location '%s'\n", svars->dname ); |
||||
return 0; |
||||
} |
||||
// Note that this may be shorter than the configuration value,
|
||||
// as that may contain a filename prefix.
|
||||
*s = 0; |
||||
if (mkdir( svars->dname, 0700 ) && errno != EEXIST) { |
||||
sys_error( "Error: cannot create SyncState directory '%s'", svars->dname ); |
||||
return 0; |
||||
} |
||||
*s = '/'; |
||||
} |
||||
nfasprintf( &svars->jname, "%s.journal", svars->dname ); |
||||
nfasprintf( &svars->nname, "%s.new", svars->dname ); |
||||
nfasprintf( &svars->lname, "%s.lock", svars->dname ); |
||||
return 1; |
||||
} |
||||
|
||||
int |
||||
lock_state( sync_vars_t *svars ) |
||||
{ |
||||
struct flock lck; |
||||
|
||||
if (svars->lfd >= 0) |
||||
return 1; |
||||
memset( &lck, 0, sizeof(lck) ); |
||||
#if SEEK_SET != 0 |
||||
lck.l_whence = SEEK_SET; |
||||
#endif |
||||
#if F_WRLCK != 0 |
||||
lck.l_type = F_WRLCK; |
||||
#endif |
||||
if ((svars->lfd = open( svars->lname, O_WRONLY | O_CREAT, 0666 )) < 0) { |
||||
sys_error( "Error: cannot create lock file %s", svars->lname ); |
||||
return 0; |
||||
} |
||||
if (fcntl( svars->lfd, F_SETLK, &lck )) { |
||||
error( "Error: channel :%s:%s-:%s:%s is locked\n", |
||||
svars->chan->stores[F]->name, svars->orig_name[F], svars->chan->stores[N]->name, svars->orig_name[N] ); |
||||
close( svars->lfd ); |
||||
svars->lfd = -1; |
||||
return 0; |
||||
} |
||||
return 1; |
||||
} |
||||
|
||||
static uchar |
||||
parse_flags( const char *buf ) |
||||
{ |
||||
uchar flags = 0; |
||||
for (uint i = 0, d = 0; i < as(MsgFlags); i++) { |
||||
if (buf[d] == MsgFlags[i]) { |
||||
flags |= (1 << i); |
||||
d++; |
||||
} |
||||
} |
||||
return flags; |
||||
} |
||||
|
||||
int |
||||
load_state( sync_vars_t *svars ) |
||||
{ |
||||
sync_rec_t *srec, *nsrec; |
||||
FILE *jfp; |
||||
uint ll; |
||||
uint maxxnuid = 0; |
||||
char fbuf[16]; // enlarge when support for keywords is added
|
||||
char buf[128], buf1[64], buf2[64]; |
||||
|
||||
if ((jfp = fopen( svars->dname, "r" ))) { |
||||
if (!lock_state( svars )) |
||||
goto jbail; |
||||
debug( "reading sync state %s ...\n", svars->dname ); |
||||
int line = 0; |
||||
while (fgets( buf, sizeof(buf), jfp )) { |
||||
line++; |
||||
if (!(ll = strlen( buf )) || buf[ll - 1] != '\n') { |
||||
error( "Error: incomplete sync state header entry at %s:%d\n", svars->dname, line ); |
||||
jbail: |
||||
fclose( jfp ); |
||||
return 0; |
||||
} |
||||
if (ll == 1) |
||||
goto gothdr; |
||||
if (line == 1 && isdigit( buf[0] )) { // Pre-1.1 legacy
|
||||
if (sscanf( buf, "%63s %63s", buf1, buf2 ) != 2 || |
||||
sscanf( buf1, "%u:%u", &svars->uidval[F], &svars->maxuid[F] ) < 2 || |
||||
sscanf( buf2, "%u:%u:%u", &svars->uidval[N], &maxxnuid, &svars->maxuid[N] ) < 3) { |
||||
error( "Error: invalid sync state header in %s\n", svars->dname ); |
||||
goto jbail; |
||||
} |
||||
goto gothdr; |
||||
} |
||||
uint uid; |
||||
if (sscanf( buf, "%63s %u", buf1, &uid ) != 2) { |
||||
error( "Error: malformed sync state header entry at %s:%d\n", svars->dname, line ); |
||||
goto jbail; |
||||
} |
||||
if (!strcmp( buf1, "FarUidValidity" ) || !strcmp( buf1, "MasterUidValidity" ) /* Pre-1.4 legacy */) { |
||||
svars->uidval[F] = uid; |
||||
} else if (!strcmp( buf1, "NearUidValidity" ) || !strcmp( buf1, "SlaveUidValidity" ) /* Pre-1.4 legacy */) { |
||||
svars->uidval[N] = uid; |
||||
} else if (!strcmp( buf1, "MaxPulledUid" )) { |
||||
svars->maxuid[F] = uid; |
||||
} else if (!strcmp( buf1, "MaxPushedUid" )) { |
||||
svars->maxuid[N] = uid; |
||||
} else if (!strcmp( buf1, "MaxExpiredFarUid" ) || !strcmp( buf1, "MaxExpiredMasterUid" ) /* Pre-1.4 legacy */) { |
||||
svars->maxxfuid = uid; |
||||
} else if (!strcmp( buf1, "MaxExpiredSlaveUid" )) { // Pre-1.3 legacy
|
||||
maxxnuid = uid; |
||||
} else { |
||||
error( "Error: unrecognized sync state header entry at %s:%d\n", svars->dname, line ); |
||||
goto jbail; |
||||
} |
||||
} |
||||
error( "Error: unterminated sync state header in %s\n", svars->dname ); |
||||
goto jbail; |
||||
gothdr: |
||||
while (fgets( buf, sizeof(buf), jfp )) { |
||||
line++; |
||||
if (!(ll = strlen( buf )) || buf[--ll] != '\n') { |
||||
error( "Error: incomplete sync state entry at %s:%d\n", svars->dname, line ); |
||||
goto jbail; |
||||
} |
||||
buf[ll] = 0; |
||||
fbuf[0] = 0; |
||||
uint t1, t2; |
||||
if (sscanf( buf, "%u %u %15s", &t1, &t2, fbuf ) < 2) { |
||||
error( "Error: invalid sync state entry at %s:%d\n", svars->dname, line ); |
||||
goto jbail; |
||||
} |
||||
srec = nfzalloc( sizeof(*srec) ); |
||||
srec->uid[F] = t1; |
||||
srec->uid[N] = t2; |
||||
char *s = fbuf; |
||||
if (*s == '<') { |
||||
s++; |
||||
srec->status = S_DUMMY(F); |
||||
} else if (*s == '>') { |
||||
s++; |
||||
srec->status = S_DUMMY(N); |
||||
} |
||||
if (*s == '^') { // Pre-1.4 legacy
|
||||
s++; |
||||
srec->status = S_SKIPPED; |
||||
} else if (*s == '~' || *s == 'X' /* Pre-1.3 legacy */) { |
||||
s++; |
||||
srec->status = S_EXPIRE | S_EXPIRED; |
||||
} else if (srec->uid[F] == (uint)-1) { // Pre-1.3 legacy
|
||||
srec->uid[F] = 0; |
||||
srec->status = S_SKIPPED; |
||||
} else if (srec->uid[N] == (uint)-1) { |
||||
srec->uid[N] = 0; |
||||
srec->status = S_SKIPPED; |
||||
} |
||||
srec->flags = parse_flags( s ); |
||||
debug( " entry (%u,%u,%u,%s%s)\n", srec->uid[F], srec->uid[N], srec->flags, |
||||
(srec->status & S_SKIPPED) ? "SKIP" : (srec->status & S_EXPIRED) ? "XPIRE" : "", |
||||
(srec->status & S_DUMMY(F)) ? ",F-DUMMY" : (srec->status & S_DUMMY(N)) ? ",N-DUMMY" : "" ); |
||||
*svars->srecadd = srec; |
||||
svars->srecadd = &srec->next; |
||||
svars->nsrecs++; |
||||
} |
||||
fclose( jfp ); |
||||
svars->existing = 1; |
||||
} else { |
||||
if (errno != ENOENT) { |
||||
sys_error( "Error: cannot read sync state %s", svars->dname ); |
||||
return 0; |
||||
} |
||||
svars->existing = 0; |
||||
} |
||||
|
||||
// This is legacy support for pre-1.3 sync states.
|
||||
if (maxxnuid) { |
||||
uint minwuid = UINT_MAX; |
||||
for (srec = svars->srecs; srec; srec = srec->next) { |
||||
if ((srec->status & (S_DEAD | S_SKIPPED | S_PENDING)) || !srec->uid[F]) |
||||
continue; |
||||
if (srec->status & S_EXPIRED) { |
||||
if (!srec->uid[N]) { |
||||
// The expired message was already gone.
|
||||
continue; |
||||
} |
||||
// The expired message was not expunged yet, so re-examine it.
|
||||
// This will happen en masse, so just extend the bulk fetch.
|
||||
} else { |
||||
if (srec->uid[N] && maxxnuid >= srec->uid[N]) { |
||||
// The non-expired message is in the generally expired range,
|
||||
// so don't make it contribute to the bulk fetch.
|
||||
continue; |
||||
} |
||||
// Usual non-expired message.
|
||||
} |
||||
if (minwuid > srec->uid[F]) |
||||
minwuid = srec->uid[F]; |
||||
} |
||||
svars->maxxfuid = minwuid - 1; |
||||
} |
||||
|
||||
int line = 0; |
||||
if ((jfp = fopen( svars->jname, "r" ))) { |
||||
if (!lock_state( svars )) |
||||
goto jbail; |
||||
struct stat st; |
||||
if (!stat( svars->nname, &st ) && fgets( buf, sizeof(buf), jfp )) { |
||||
debug( "recovering journal ...\n" ); |
||||
if (!(ll = strlen( buf )) || buf[--ll] != '\n') { |
||||
error( "Error: incomplete journal header in %s\n", svars->jname ); |
||||
goto jbail; |
||||
} |
||||
buf[ll] = 0; |
||||
if (!equals( buf, (int)ll, JOURNAL_VERSION, strlen(JOURNAL_VERSION) )) { |
||||
error( "Error: incompatible journal version" |
||||
" (got %s, expected " JOURNAL_VERSION ")\n", buf ); |
||||
goto jbail; |
||||
} |
||||
srec = NULL; |
||||
line = 1; |
||||
while (fgets( buf, sizeof(buf), jfp )) { |
||||
line++; |
||||
if (!(ll = strlen( buf )) || buf[--ll] != '\n') { |
||||
error( "Error: incomplete journal entry at %s:%d\n", svars->jname, line ); |
||||
goto jbail; |
||||
} |
||||
buf[ll] = 0; |
||||
char c; |
||||
int tn; |
||||
uint t1, t2, t3, t4; |
||||
if ((c = buf[0]) == '#' ? |
||||
(tn = 0, (sscanf( buf + 2, "%u %u %n", &t1, &t2, &tn ) < 2) || !tn || (ll - (uint)tn != TUIDL + 2)) : |
||||
c == '!' ? |
||||
(sscanf( buf + 2, "%u", &t1 ) != 1) : |
||||
c == 'N' || c == 'F' || c == 'T' || c == '+' || c == '&' || c == '-' || c == '=' || c == '_' || c == '|' ? |
||||
(sscanf( buf + 2, "%u %u", &t1, &t2 ) != 2) : |
||||
c != '^' ? |
||||
(sscanf( buf + 2, "%u %u %u", &t1, &t2, &t3 ) != 3) : |
||||
(sscanf( buf + 2, "%u %u %u %u", &t1, &t2, &t3, &t4 ) != 4)) |
||||
{ |
||||
error( "Error: malformed journal entry at %s:%d\n", svars->jname, line ); |
||||
goto jbail; |
||||
} |
||||
if (c == 'N') { |
||||
svars->maxuid[t1] = t2; |
||||
} else if (c == 'F') { |
||||
svars->finduid[t1] = t2; |
||||
} else if (c == 'T') { |
||||
*uint_array_append( &svars->trashed_msgs[t1] ) = t2; |
||||
} else if (c == '!') { |
||||
svars->maxxfuid = t1; |
||||
} else if (c == '|') { |
||||
svars->uidval[F] = t1; |
||||
svars->uidval[N] = t2; |
||||
} else if (c == '+') { |
||||
srec = nfzalloc( sizeof(*srec) ); |
||||
srec->uid[F] = t1; |
||||
srec->uid[N] = t2; |
||||
debug( " new entry(%u,%u)\n", t1, t2 ); |
||||
srec->status = S_PENDING; |
||||
*svars->srecadd = srec; |
||||
svars->srecadd = &srec->next; |
||||
svars->nsrecs++; |
||||
} else { |
||||
for (nsrec = srec; srec; srec = srec->next) |
||||
if (srec->uid[F] == t1 && srec->uid[N] == t2) |
||||
goto syncfnd; |
||||
for (srec = svars->srecs; srec != nsrec; srec = srec->next) |
||||
if (srec->uid[F] == t1 && srec->uid[N] == t2) |
||||
goto syncfnd; |
||||
error( "Error: journal entry at %s:%d refers to non-existing sync state entry\n", svars->jname, line ); |
||||
goto jbail; |
||||
syncfnd: |
||||
debugn( " entry(%u,%u,%u) ", srec->uid[F], srec->uid[N], srec->flags ); |
||||
switch (c) { |
||||
case '-': |
||||
debug( "killed\n" ); |
||||
srec->status = S_DEAD; |
||||
break; |
||||
case '=': |
||||
debug( "aborted\n" ); |
||||
if (svars->maxxfuid < srec->uid[F]) |
||||
svars->maxxfuid = srec->uid[F]; |
||||
srec->status = S_DEAD; |
||||
break; |
||||
case '#': |
||||
memcpy( srec->tuid, buf + tn + 2, TUIDL ); |
||||
debug( "TUID now %." stringify(TUIDL) "s\n", srec->tuid ); |
||||
break; |
||||
case '&': |
||||
debug( "TUID %." stringify(TUIDL) "s lost\n", srec->tuid ); |
||||
srec->tuid[0] = 0; |
||||
break; |
||||
case '<': |
||||
debug( "far side now %u\n", t3 ); |
||||
assign_uid( svars, srec, F, t3 ); |
||||
break; |
||||
case '>': |
||||
debug( "near side now %u\n", t3 ); |
||||
assign_uid( svars, srec, N, t3 ); |
||||
break; |
||||
case '*': |
||||
debug( "flags now %u\n", t3 ); |
||||
srec->flags = (uchar)t3; |
||||
srec->aflags[F] = srec->aflags[N] = 0; // Clear F_DELETED from purge
|
||||
srec->wstate &= ~W_PURGE; |
||||
break; |
||||
case '~': |
||||
debug( "status now %#x\n", t3 ); |
||||
srec->status = (uchar)t3; |
||||
break; |
||||
case '_': |
||||
debug( "has placeholder now\n" ); |
||||
srec->status = S_PENDING; // Pre-1.4 legacy only
|
||||
srec->status |= !srec->uid[F] ? S_DUMMY(F) : S_DUMMY(N); |
||||
break; |
||||
case '^': |
||||
debug( "is being upgraded, flags %u, srec flags %u\n", t3, t4 ); |
||||
srec->pflags = (uchar)t3; |
||||
srec->flags = (uchar)t4; |
||||
srec = upgrade_srec( svars, srec ); |
||||
break; |
||||
default: |
||||
error( "Error: unrecognized journal entry at %s:%d\n", svars->jname, line ); |
||||
goto jbail; |
||||
} |
||||
} |
||||
} |
||||
} |
||||
fclose( jfp ); |
||||
sort_uint_array( svars->trashed_msgs[F].array ); |
||||
sort_uint_array( svars->trashed_msgs[N].array ); |
||||
} else { |
||||
if (errno != ENOENT) { |
||||
sys_error( "Error: cannot read journal %s", svars->jname ); |
||||
return 0; |
||||
} |
||||
} |
||||
svars->replayed = line; |
||||
|
||||
return 1; |
||||
} |
||||
|
||||
static void |
||||
create_state( sync_vars_t *svars ) |
||||
{ |
||||
if (!(svars->nfp = fopen( svars->nname, "w" ))) { |
||||
sys_error( "Error: cannot create new sync state %s", svars->nname ); |
||||
exit( 1 ); |
||||
} |
||||
} |
||||
|
||||
void |
||||
jFprintf( sync_vars_t *svars, const char *msg, ... ) |
||||
{ |
||||
va_list va; |
||||
|
||||
if (JLimit && !--JLimit) |
||||
exit( 101 ); |
||||
if (!svars->jfp) { |
||||
create_state( svars ); |
||||
if (!(svars->jfp = fopen( svars->jname, svars->replayed ? "a" : "w" ))) { |
||||
sys_error( "Error: cannot create journal %s", svars->jname ); |
||||
exit( 1 ); |
||||
} |
||||
setlinebuf( svars->jfp ); |
||||
if (!svars->replayed) |
||||
Fprintf( svars->jfp, JOURNAL_VERSION "\n" ); |
||||
} |
||||
va_start( va, msg ); |
||||
vFprintf( svars->jfp, msg, va ); |
||||
va_end( va ); |
||||
if (JLimit && !--JLimit) |
||||
exit( 100 ); |
||||
} |
||||
|
||||
void |
||||
save_state( sync_vars_t *svars ) |
||||
{ |
||||
// If no change was made, the state is also unmodified.
|
||||
if (!svars->jfp && !svars->replayed) |
||||
return; |
||||
|
||||
if (!svars->nfp) |
||||
create_state( svars ); |
||||
Fprintf( svars->nfp, |
||||
"FarUidValidity %u\nNearUidValidity %u\nMaxPulledUid %u\nMaxPushedUid %u\n", |
||||
svars->uidval[F], svars->uidval[N], svars->maxuid[F], svars->maxuid[N] ); |
||||
if (svars->maxxfuid) |
||||
Fprintf( svars->nfp, "MaxExpiredFarUid %u\n", svars->maxxfuid ); |
||||
Fprintf( svars->nfp, "\n" ); |
||||
for (sync_rec_t *srec = svars->srecs; srec; srec = srec->next) { |
||||
if (srec->status & S_DEAD) |
||||
continue; |
||||
char fbuf[16]; // enlarge when support for keywords is added
|
||||
make_flags( srec->flags, fbuf ); |
||||
Fprintf( svars->nfp, "%u %u %s%s%s\n", srec->uid[F], srec->uid[N], |
||||
(srec->status & S_DUMMY(F)) ? "<" : (srec->status & S_DUMMY(N)) ? ">" : "", |
||||
(srec->status & S_SKIPPED) ? "^" : (srec->status & S_EXPIRED) ? "~" : "", fbuf ); |
||||
} |
||||
|
||||
Fclose( svars->nfp, 1 ); |
||||
if (svars->jfp) |
||||
Fclose( svars->jfp, 0 ); |
||||
if (!(DFlags & KEEPJOURNAL)) { |
||||
// Order is important!
|
||||
if (rename( svars->nname, svars->dname )) |
||||
warn( "Warning: cannot commit sync state %s\n", svars->dname ); |
||||
else if (unlink( svars->jname )) |
||||
warn( "Warning: cannot delete journal %s\n", svars->jname ); |
||||
} |
||||
} |
||||
|
||||
void |
||||
delete_state( sync_vars_t *svars ) |
||||
{ |
||||
unlink( svars->nname ); |
||||
unlink( svars->jname ); |
||||
if (unlink( svars->dname ) || unlink( svars->lname )) { |
||||
sys_error( "Error: channel %s: sync state cannot be deleted", svars->chan->name ); |
||||
svars->ret = SYNC_FAIL; |
||||
} |
||||
} |
||||
|
||||
|
||||
void |
||||
assign_uid( sync_vars_t *svars, sync_rec_t *srec, int t, uint uid ) |
||||
{ |
||||
srec->uid[t] = uid; |
||||
if (uid == svars->maxuid[t] + 1) |
||||
svars->maxuid[t] = uid; |
||||
srec->status &= ~S_PENDING; |
||||
srec->wstate &= ~W_UPGRADE; |
||||
srec->tuid[0] = 0; |
||||
} |
||||
|
||||
void |
||||
assign_tuid( sync_vars_t *svars, sync_rec_t *srec ) |
||||
{ |
||||
for (uint i = 0; i < TUIDL; i++) { |
||||
uchar c = arc4_getbyte() & 0x3f; |
||||
srec->tuid[i] = (char)(c < 26 ? c + 'A' : c < 52 ? c + 'a' - 26 : |
||||
c < 62 ? c + '0' - 52 : c == 62 ? '+' : '/'); |
||||
} |
||||
JLOG( "# %u %u %." stringify(TUIDL) "s", (srec->uid[F], srec->uid[N], srec->tuid), "new TUID" ); |
||||
} |
||||
|
||||
int |
||||
match_tuids( sync_vars_t *svars, int t, message_t *msgs ) |
||||
{ |
||||
message_t *tmsg, *ntmsg = NULL; |
||||
const char *diag; |
||||
int num_lost = 0; |
||||
|
||||
for (sync_rec_t *srec = svars->srecs; srec; srec = srec->next) { |
||||
if (srec->status & S_DEAD) |
||||
continue; |
||||
if (!srec->uid[t] && srec->tuid[0]) { |
||||
debug( "pair(%u,%u) TUID %." stringify(TUIDL) "s\n", srec->uid[F], srec->uid[N], srec->tuid ); |
||||
for (tmsg = ntmsg; tmsg; tmsg = tmsg->next) { |
||||
if (tmsg->status & M_DEAD) |
||||
continue; |
||||
if (tmsg->tuid[0] && !memcmp( tmsg->tuid, srec->tuid, TUIDL )) { |
||||
diag = (tmsg == ntmsg) ? "adjacently" : "after gap"; |
||||
goto mfound; |
||||
} |
||||
} |
||||
for (tmsg = msgs; tmsg != ntmsg; tmsg = tmsg->next) { |
||||
if (tmsg->status & M_DEAD) |
||||
continue; |
||||
if (tmsg->tuid[0] && !memcmp( tmsg->tuid, srec->tuid, TUIDL )) { |
||||
diag = "after reset"; |
||||
goto mfound; |
||||
} |
||||
} |
||||
JLOG( "& %u %u", (srec->uid[F], srec->uid[N]), "TUID lost" ); |
||||
// Note: status remains S_PENDING.
|
||||
srec->tuid[0] = 0; |
||||
num_lost++; |
||||
continue; |
||||
mfound: |
||||
tmsg->srec = srec; |
||||
srec->msg[t] = tmsg; |
||||
ntmsg = tmsg->next; |
||||
ASSIGN_UID( srec, t, tmsg->uid, "TUID matched %s", diag ); |
||||
} |
||||
} |
||||
return num_lost; |
||||
} |
||||
|
||||
sync_rec_t * |
||||
upgrade_srec( sync_vars_t *svars, sync_rec_t *srec ) |
||||
{ |
||||
// Create an entry and append it to the current one.
|
||||
sync_rec_t *nsrec = nfzalloc( sizeof(*nsrec) ); |
||||
nsrec->next = srec->next; |
||||
srec->next = nsrec; |
||||
if (svars->srecadd == &srec->next) |
||||
svars->srecadd = &nsrec->next; |
||||
// Move the placeholder to the new entry.
|
||||
int t = (srec->status & S_DUMMY(F)) ? F : N; |
||||
nsrec->uid[t] = srec->uid[t]; |
||||
srec->uid[t] = 0; |
||||
if (srec->msg[t]) { // NULL during journal replay; is assigned later.
|
||||
nsrec->msg[t] = srec->msg[t]; |
||||
nsrec->msg[t]->srec = nsrec; |
||||
srec->msg[t] = NULL; |
||||
} |
||||
// Mark the original entry for upgrade.
|
||||
srec->status = (srec->status & ~(S_DUMMY(F)|S_DUMMY(N))) | S_PENDING; |
||||
srec->wstate |= W_UPGRADE; |
||||
// Mark the placeholder for nuking.
|
||||
nsrec->wstate = W_PURGE; |
||||
nsrec->aflags[t] = F_DELETED; |
||||
return nsrec; |
||||
} |
||||
Loading…
Reference in new issue