static void
_blackbox_close(int32_t target)
{
struct qb_log_target *t = qb_log_target_get(target);
if (t->instance) {
qb_rb_close(t->instance);
t->instance = NULL;
}
}
static void
_blackbox_reload(int32_t target)
{
struct qb_log_target *t = qb_log_target_get(target);
if (t->instance == NULL) {
return;
}
qb_rb_close(t->instance);
t->instance = qb_rb_open(t->filename, t->size,
QB_RB_FLAG_CREATE | QB_RB_FLAG_OVERWRITE, 0);
}
ssize_t
qb_log_blackbox_write_to_file(const char *filename)
{
ssize_t written_size = 0;
struct qb_log_target *t;
int fd = open(filename, O_CREAT | O_RDWR, 0700);
if (fd < 0) {
return -errno;
}
t = qb_log_target_get(QB_LOG_BLACKBOX);
if (t->instance) {
written_size = qb_rb_write_to_file(t->instance, fd);
} else {
written_size = -ENOENT;
}
close(fd);
return written_size;
}
/* <u32> file lineno
* <u32> tags
* <u8> priority
* <u32> function name length
* <string> function name
* <u32> buffer length
* <string> buffer
*/
static void
_blackbox_vlogger(int32_t target,
struct qb_log_callsite *cs, time_t timestamp, va_list ap)
{
size_t max_size;
size_t actual_size;
uint32_t fn_size;
char *chunk;
char *msg_len_pt;
uint32_t msg_len;
struct qb_log_target *t = qb_log_target_get(target);
if (t->instance == NULL) {
return;
}
fn_size = strlen(cs->function) + 1;
actual_size = 4 * sizeof(uint32_t) + sizeof(uint8_t) + fn_size + sizeof(time_t);
max_size = actual_size + QB_LOG_MAX_LEN;
chunk = qb_rb_chunk_alloc(t->instance, max_size);
if (chunk == NULL) {
/* something bad has happened. abort blackbox logging */
qb_util_perror(LOG_ERR, "Blackbox allocation error, aborting blackbox log %s", t->filename);
qb_rb_close(t->instance);
t->instance = NULL;
return;
}
/* line number */
memcpy(chunk, &cs->lineno, sizeof(uint32_t));
chunk += sizeof(uint32_t);
/* tags */
memcpy(chunk, &cs->tags, sizeof(uint32_t));
chunk += sizeof(uint32_t);
/* log level/priority */
memcpy(chunk, &cs->priority, sizeof(uint8_t));
chunk += sizeof(uint8_t);
/* function name */
memcpy(chunk, &fn_size, sizeof(uint32_t));
chunk += sizeof(uint32_t);
memcpy(chunk, cs->function, fn_size);
chunk += fn_size;
/* timestamp */
memcpy(chunk, ×tamp, sizeof(time_t));
chunk += sizeof(time_t);
/* log message length */
msg_len_pt = chunk;
chunk += sizeof(uint32_t);
/* log message */
msg_len = qb_vsnprintf_serialize(chunk, QB_LOG_MAX_LEN, cs->format, ap);
if (msg_len >= QB_LOG_MAX_LEN) {
chunk = msg_len_pt + sizeof(uint32_t); /* Reset */
msg_len = qb_vsnprintf_serialize(chunk, QB_LOG_MAX_LEN,
"Log message too long to be stored in the blackbox. "\
"Maximum is QB_LOG_MAX_LEN" , ap);
actual_size += msg_len;
}
actual_size += msg_len;
/* now that we know the length, write it
*/
memcpy(msg_len_pt, &msg_len, sizeof(uint32_t));
(void)qb_rb_chunk_commit(t->instance, actual_size);
}
/*
* %n FUNCTION NAME
* %f FILENAME
* %l FILELINE
* %p PRIORITY
* %t TIMESTAMP
* %b BUFFER
* %g SUBSYSTEM
*
* any number between % and character specify field length to pad or chop
*/
void
qb_log_target_format(int32_t target,
struct qb_log_callsite *cs,
time_t current_time,
const char *formatted_message, char *output_buffer)
{
char tmp_buf[128];
struct tm tm_res;
unsigned int format_buffer_idx = 0;
unsigned int output_buffer_idx = 0;
size_t cutoff;
uint32_t len;
int ralign;
int c;
struct qb_log_target *t = qb_log_target_get(target);
if (t->format == NULL) {
return;
}
while ((c = t->format[format_buffer_idx])) {
cutoff = 0;
ralign = 0;
if (c != '%') {
output_buffer[output_buffer_idx++] = c;
format_buffer_idx++;
} else {
const char *p;
format_buffer_idx += 1;
if (t->format[format_buffer_idx] == '-') {
ralign = 1;
format_buffer_idx += 1;
}
if (isdigit(t->format[format_buffer_idx])) {
cutoff = atoi(&t->format[format_buffer_idx]);
}
while (isdigit(t->format[format_buffer_idx])) {
format_buffer_idx += 1;
}
switch (t->format[format_buffer_idx]) {
case 'g':
if (_user_tags_stringify_fn) {
p = _user_tags_stringify_fn(cs->tags);
} else {
p = "";
}
break;
case 'n':
p = cs->function;
break;
case 'f':
#ifdef BUILDING_IN_PLACE
p = cs->filename;
#else
p = strrchr(cs->filename, '/');
if (p == NULL) {
p = cs->filename;
} else {
p++; /* move past the "/" */
}
#endif /* BUILDING_IN_PLACE */
break;
case 'l':
snprintf(tmp_buf, 30, "%d", cs->lineno);
p = tmp_buf;
break;
case 't':
(void)localtime_r(¤t_time, &tm_res);
snprintf(tmp_buf, TIME_STRING_SIZE,
"%s %02d %02d:%02d:%02d",
log_month_name[tm_res.tm_mon],
tm_res.tm_mday, tm_res.tm_hour,
tm_res.tm_min, tm_res.tm_sec);
p = tmp_buf;
break;
case 'b':
p = formatted_message;
break;
case 'p':
if (cs->priority > LOG_TRACE) {
p = prioritynames[LOG_TRACE].c_name;
} else {
p = prioritynames[cs->priority].c_name;
}
break;
default:
p = "";
break;
}
len = _strcpy_cutoff(output_buffer + output_buffer_idx,
p, cutoff, ralign,
(QB_LOG_MAX_LEN -
output_buffer_idx));
output_buffer_idx += len;
format_buffer_idx += 1;
}
if (output_buffer_idx >= QB_LOG_MAX_LEN - 1) {
break;
}
}
if (output_buffer[output_buffer_idx - 1] == '\n') {
output_buffer[output_buffer_idx - 1] = '\0';
} else {
output_buffer[output_buffer_idx] = '\0';
}
}
/*
* This function will do static formatting (for things that don't
* change on each log message).
*
* %P PID
* %N name passed into qb_log_init
* %H hostname
*
* any number between % and character specify field length to pad or chop
*/
void
qb_log_target_format_static(int32_t target, const char * format,
char *output_buffer)
{
char tmp_buf[255];
unsigned int format_buffer_idx = 0;
unsigned int output_buffer_idx = 0;
size_t cutoff;
uint32_t len;
int ralign;
int c;
struct qb_log_target *t = qb_log_target_get(target);
if (format == NULL) {
return;
}
while ((c = format[format_buffer_idx])) {
cutoff = 0;
ralign = 0;
if (c != '%') {
output_buffer[output_buffer_idx++] = c;
format_buffer_idx++;
} else {
const char *p;
unsigned int percent_buffer_idx = format_buffer_idx;
format_buffer_idx += 1;
if (format[format_buffer_idx] == '-') {
ralign = 1;
format_buffer_idx += 1;
}
if (isdigit(format[format_buffer_idx])) {
cutoff = atoi(&format[format_buffer_idx]);
}
while (isdigit(format[format_buffer_idx])) {
format_buffer_idx += 1;
}
switch (format[format_buffer_idx]) {
case 'P':
snprintf(tmp_buf, 30, "%d", getpid());
p = tmp_buf;
break;
case 'N':
p = t->name;
break;
case 'H':
if (gethostname(tmp_buf, 255) == 0) {
tmp_buf[254] = '\0';
} else {
(void)strlcpy(tmp_buf, "localhost", 255);
}
p = tmp_buf;
break;
default:
p = &format[percent_buffer_idx];
cutoff = (format_buffer_idx - percent_buffer_idx + 1);
ralign = 0;
break;
}
len = _strcpy_cutoff(output_buffer + output_buffer_idx,
p, cutoff, ralign,
(QB_LOG_MAX_LEN -
output_buffer_idx));
output_buffer_idx += len;
format_buffer_idx += 1;
}
if (output_buffer_idx >= QB_LOG_MAX_LEN - 1) {
break;
}
}
output_buffer[output_buffer_idx] = '\0';
}