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Optional nanosecond timestamp logging

Rikus Wessels 2025-03-11 10:38:51 +02:00
parent 76b5891765
commit 71e8c16178
1 changed files with 35 additions and 12 deletions
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47
candump.c
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@ -128,6 +128,7 @@ static void print_usage(void)
fprintf(stderr, "Options:\n");
fprintf(stderr, " -t <type> (timestamp: (a)bsolute/(d)elta/(z)ero/(A)bsolute w date)\n");
fprintf(stderr, " -H (read hardware timestamps instead of system timestamps)\n");
fprintf(stderr, " -N (log nanosecond timestamps instead of microseconds)\n");
fprintf(stderr, " -c (increment color mode level)\n");
fprintf(stderr, " -i (binary output - may exceed 80 chars/line)\n");
fprintf(stderr, " -a (enable additional ASCII output)\n");
@ -220,16 +221,22 @@ static int idx2dindex(int ifidx, int socket)
return i;
}
static int sprint_timestamp(char *ts_buffer, const char timestamp,
static int sprint_timestamp(char *ts_buffer, const char timestamp, unsigned char use_ns,
const struct timespec *ts, struct timespec *const last_ts)
{
int numchars = 0;
switch (timestamp) {
case 'a': /* absolute with timestamp */
numchars = sprintf(ts_buffer, "(%010llu.%09llu) ",
(unsigned long long)ts->tv_sec,
(unsigned long long)ts->tv_nsec);
if (use_ns) {
numchars = sprintf(ts_buffer, "(%010llu.%09llu) ",
(unsigned long long)ts->tv_sec,
(unsigned long long)ts->tv_nsec);
} else {
numchars = sprintf(ts_buffer, "(%010llu.%06llu) ",
(unsigned long long)ts->tv_sec,
(unsigned long long)ts->tv_nsec / 1000);
}
break;
case 'A': /* absolute with date */
@ -239,8 +246,13 @@ static int sprint_timestamp(char *ts_buffer, const char timestamp,
tm = *localtime(&ts->tv_sec);
strftime(timestring, 24, "%Y-%m-%d %H:%M:%S", &tm);
numchars = sprintf(ts_buffer, "(%s.%09llu) ", timestring,
(unsigned long long)ts->tv_nsec);
if (use_ns) {
numchars = sprintf(ts_buffer, "(%s.%09llu) ", timestring,
(unsigned long long)ts->tv_nsec);
} else {
numchars = sprintf(ts_buffer, "(%s.%06llu) ", timestring,
(unsigned long long)ts->tv_nsec / 1000);
}
}
break;
@ -257,9 +269,15 @@ static int sprint_timestamp(char *ts_buffer, const char timestamp,
diff.tv_sec--, diff.tv_nsec += 1000000000;
if (diff.tv_sec < 0)
diff.tv_sec = diff.tv_nsec = 0;
numchars = sprintf(ts_buffer, "(%03llu.%09llu) ",
(unsigned long long)diff.tv_sec,
(unsigned long long)diff.tv_nsec);
if (use_ns) {
numchars = sprintf(ts_buffer, "(%03llu.%09llu) ",
(unsigned long long)diff.tv_sec,
(unsigned long long)diff.tv_nsec);
} else {
numchars = sprintf(ts_buffer, "(%03llu.%06llu) ",
(unsigned long long)diff.tv_sec,
(unsigned long long)diff.tv_nsec / 1000);
}
if (timestamp == 'd')
*last_ts = *ts; /* update for delta calculation */
@ -288,6 +306,7 @@ int main(int argc, char **argv)
unsigned char timestamp = 0;
unsigned char logtimestamp = 'a';
unsigned char hwtimestamp = 0;
unsigned char use_ns = 0;
unsigned char down_causes_exit = 1;
unsigned char dropmonitor = 0;
unsigned char extra_msg_info = 0;
@ -339,7 +358,7 @@ int main(int argc, char **argv)
progname = basename(argv[0]);
while ((opt = getopt(argc, argv, "t:HciaSs:lf:Ln:r:Dde8xT:h?")) != -1) {
while ((opt = getopt(argc, argv, "t:HNciaSs:lf:Ln:r:Dde8xT:h?")) != -1) {
switch (opt) {
case 't':
timestamp = optarg[0];
@ -359,6 +378,10 @@ int main(int argc, char **argv)
hwtimestamp = 1;
break;
case 'N':
use_ns = 1;
break;
case 'c':
color++;
break;
@ -834,7 +857,7 @@ int main(int argc, char **argv)
/* build common log format output */
if ((log) || ((logfrmt) && (silent == SILENT_OFF))) {
alen = sprint_timestamp(afrbuf, logtimestamp,
alen = sprint_timestamp(afrbuf, logtimestamp, use_ns,
&ts, &last_ts);
alen += sprintf(afrbuf + alen, "%*s ",
@ -864,7 +887,7 @@ int main(int argc, char **argv)
/* print (colored) long CAN frame style to stdout */
alen = sprintf(afrbuf, " %s", (color > 2) ? col_on[idx % MAXCOL] : "");
alen += sprint_timestamp(afrbuf + alen, timestamp, &ts, &last_ts);
alen += sprint_timestamp(afrbuf + alen, timestamp, use_ns, &ts, &last_ts);
alen += sprintf(afrbuf + alen, " %s%*s",
(color && (color < 3)) ? col_on[idx % MAXCOL] : "",
max_devname_len, devname[idx]);