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#include "registry_internals.h"
void registry_log(const char action, REGISTRY_PERSON *p, REGISTRY_MACHINE *m, REGISTRY_URL *u, char *name) {
if(likely(registry.log_fp)) {
if(unlikely(fprintf(registry.log_fp, "%c\t%08x\t%s\t%s\t%s\t%s\n",
action,
p->last_t,
p->guid,
m->guid,
name,
u->url) < 0))
error("Registry: failed to save log. Registry data may be lost in case of abnormal restart.");
// we increase the counter even on failures
// so that the registry will be saved periodically
registry.log_count++;
// this must be outside the log_lock(), or a deadlock will happen.
// registry_db_save() checks the same inside the log_lock, so only
// one thread will save the db
if(unlikely(registry_db_should_be_saved()))
registry_db_save();
}
}
int registry_log_open(void) {
if(registry.log_fp)
fclose(registry.log_fp);
registry.log_fp = fopen(registry.log_filename, "a");
if(registry.log_fp) {
if (setvbuf(registry.log_fp, NULL, _IOLBF, 0) != 0)
error("Cannot set line buffering on registry log file.");
return 0;
}
error("Cannot open registry log file '%s'. Registry data will be lost in case of netdata or server crash.", registry.log_filename);
return -1;
}
void registry_log_close(void) {
if(registry.log_fp) {
fclose(registry.log_fp);
registry.log_fp = NULL;
}
}
void registry_log_recreate(void) {
if(registry.log_fp != NULL) {
registry_log_close();
// open it with truncate
registry.log_fp = fopen(registry.log_filename, "w");
if(registry.log_fp) fclose(registry.log_fp);
else error("Cannot truncate registry log '%s'", registry.log_filename);
registry.log_fp = NULL;
registry_log_open();
}
}
ssize_t registry_log_load(void) {
ssize_t line = -1;
// closing the log is required here
// otherwise we will append to it the values we read
registry_log_close();
debug(D_REGISTRY, "Registry: loading active db from: %s", registry.log_filename);
FILE *fp = fopen(registry.log_filename, "r");
if(!fp)
error("Registry: cannot open registry file: %s", registry.log_filename);
else {
char *s, buf[4096 + 1];
line = 0;
size_t len = 0;
while ((s = fgets_trim_len(buf, 4096, fp, &len))) {
line++;
switch (s[0]) {
case 'A': // accesses
case 'D': // deletes
// verify it is valid
if (unlikely(len < 85 || s[1] != '\t' || s[10] != '\t' || s[47] != '\t' || s[84] != '\t')) {
error("Registry: log line %zd is wrong (len = %zu).", line, len);
continue;
}
s[1] = s[10] = s[47] = s[84] = '\0';
// get the variables
time_t when = strtoul(&s[2], NULL, 16);
char *person_guid = &s[11];
char *machine_guid = &s[48];
char *name = &s[85];
// skip the name to find the url
char *url = name;
while(*url && *url != '\t') url++;
if(!*url) {
error("Registry: log line %zd does not have a url.", line);
continue;
}
*url++ = '\0';
// make sure the person exists
// without this, a new person guid will be created
REGISTRY_PERSON *p = registry_person_find(person_guid);
if(!p) p = registry_person_allocate(person_guid, when);
if(s[0] == 'A')
registry_request_access(p->guid, machine_guid, url, name, when);
else
registry_request_delete(p->guid, machine_guid, url, name, when);
registry.log_count++;
break;
default:
error("Registry: ignoring line %zd of filename '%s': %s.", line, registry.log_filename, s);
break;
}
}
fclose(fp);
}
// open the log again
registry_log_open();
return line;
}
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