linux获取系统毫秒级

date +%s%3N

1633072800123

printf '%(%s%3N)T\n' -1

#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;
}

import time

current_time_millis = int(time.time() * 1000)
print(f"Current time in milliseconds: {current_time_millis}")