create .synced/NAMES.last to document last sync attempts
MODIFY
src/afl-fuzz-run.c
src/afl-fuzz-run.c
@@ -466,6 +466,12 @@ void sync_fuzzers(afl_state_t *afl) {
synced++;
+ /* document the attempt to sync to this instance */
+
+ sprintf(qd_synced_path, "%s/.synced/%s.last", afl->out_dir, sd_ent->d_name);
+ id_fd = open(qd_synced_path, O_RDWR | O_CREAT | O_TRUNC, 0600);
+ if (id_fd >= 0) close(id_fd);
+
/* Skip anything that doesn't have a queue/ subdirectory. */
sprintf(qd_path, "%s/%s/queue", afl->sync_dir, sd_ent->d_name);
@@ -490,14 +496,13 @@ void sync_fuzzers(afl_state_t *afl) {
if (id_fd < 0) { PFATAL("Unable to create '%s'", qd_synced_path); }
- if (read(id_fd, &min_accept, sizeof(u32)) > 0) {
+ if (read(id_fd, &min_accept, sizeof(u32)) == sizeof(u32)) {
+ next_min_accept = min_accept;
lseek(id_fd, 0, SEEK_SET);
}
- next_min_accept = min_accept;
-
/* Show stats */
snprintf(afl->stage_name_buf, STAGE_BUF_SIZE, "sync %u", ++sync_cnt);

MODIFY
src/afl-fuzz.c
src/afl-fuzz.c
@@ -384,7 +384,7 @@ int main(int argc, char **argv_orig, char **envp) {
afl->out_dir = optarg;
break;
- case 'M': { /* master sync ID */
+ case 'M': { /* main sync ID */
u8 *c;
@@ -413,7 +413,7 @@ int main(int argc, char **argv_orig, char **envp) {
break;
- case 'S':
+ case 'S': /* secondary sync id */
if (afl->sync_id) { FATAL("Multiple -S or -M options not supported"); }
afl->sync_id = ck_strdup(optarg);

create .synced/NAMES.last to document last sync attempts