Example: Get the Info from File

main.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>


int main(int argc, const char * argv[])
{
    FILE *fd;
    char buf[96];
    char ip_str[16], hostname[16], id[6];
    int temp, humi;
    
    
    if ((fd = fopen("/tmp/test", "r")))
    {
        printf("fd2=%d\n", fd);
        while (fgets(buf, 96, fd))
        {
            buf[strlen(buf)-1] = '\0';
            sscanf(buf, "%s %s %s %d %d", ip_str, hostname, id, &temp, &humi);
            printf("%s,%s,%s,%d,%d\n", ip_str, hostname, id, temp, humi);
        }
        fclose(fd);
    }
    
    return 0;
}