ccc

#include
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <time.h>


#include <signal.h>
#define MAXBUFSIZE 1024


static int g_flag = 0; 
void sigalrm_fn(int sig)
{
    g_flag = 1; 
    alarm(1);
    return;
}


int main(void)
{
    FILE* file = NULL;
    char *buf = NULL;
    time_t ts = 0;


    buf = calloc(1, 30);
    file = fopen("/home/nec/hejian/Command.log", "w+");
    if(file == NULL) {
printf("file open faile!\n");
    }

    signal(SIGALRM, sigalrm_fn);
    alarm(1);




    while(1) {
        ts = time(NULL);
memset(buf, 0, 20);
sprintf(buf, "lps time = %lu\n", ts);
if (g_flag == 1) {
   g_flag = 0;
   fwrite(buf, strlen(buf), 1, file);
            fflush(file);
}

    }
    free(buf);
    fclose(file);
    return 0;
}