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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <sys/types.h>
#include <sys/time.h>
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
int
main(int argc, char **argv)
{
char line[10000];
double delta = 0;
if (argc != 1) {
fprintf(stderr, "Usage: %s < <vespa.log>\n"
"Replays a vespa log file with the same timing delta between each log message.\n"
"Reprints the log messages without timestamps.\n\n",
argv[0]);
return EXIT_FAILURE;
}
while (fgets(line, sizeof line, stdin)) {
struct timeval tv;
char *s;
double log_time;
double now;
double delay;
gettimeofday(&tv, NULL);
now = tv.tv_sec + 1e-6 * tv.tv_usec;
log_time = strtod(line, NULL);
if (!delta) {
delta = now - log_time;
}
delay = log_time + delta - now;
if (delay > 0) {
tv.tv_sec = floor(delay);
tv.tv_usec = 1e6 * (delay - floor(delay));
/* fprintf(stderr, "Sleeping for %.3fs\n", delay); */
select(0, NULL, NULL, NULL, &tv);
}
s = strchr(line, '\t');
if (s) {
s = s + 1;
} else {
s = line;
}
fwrite(s, strlen(s), 1, stdout);
fflush(stdout);
}
return EXIT_SUCCESS;
}
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