linux获取毫秒级时间

date +%s%3N

1633072800123

#include <stdio.h>
#include <sys/time.h>

long long get_current_time_millis() {
    struct timeval tv;
    gettimeofday(&tv, NULL);
    return (long long)(tv.tv_sec) * 1000 + (tv.tv_usec) / 1000;
}

int main() {
    printf("Current time in milliseconds: %lld
", get_current_time_millis());
    return 0;
}

#include <stdio.h>
#include <time.h>

long long get_current_time_millis() {
    struct timespec ts;
    clock_gettime(CLOCK_REALTIME, &ts);
    return (long long)(ts.tv_sec) * 1000 + (ts.tv_nsec) / 1000000;
}

int main() {
    printf("Current time in milliseconds: %lld
", get_current_time_millis());
    return 0;
}

#!/usr/bin/perl
use Time::HiRes qw(gettimeofday);

my $time = gettimeofday;
my $milliseconds = int($time * 1000);
print "Current time in milliseconds: $milliseconds
";