动态检查wlan_chip中的字段是否出现了期望的数值-源码

#include
#include
#include
#include
#include

static int check_wlan_chip(const char *tag, int secs)
{
#define DRIVER_LIVE_FILE    "/proc/wlan_chip"  
    char *line;
    int line_size;
    FILE *proc;
    int delay;

    line_size = strlen(tag) + 1;
    line = malloc(line_size);
    secs *= 10;
    //setvbuf(proc, NULL, _IONBF, 0);
    for (delay = 0; delay < secs; delay++) {

        if ((proc = fopen(DRIVER_LIVE_FILE, "r")) == NULL) {
            fprintf(stderr, "Error : %s : %s\n", DRIVER_LIVE_FILE, strerror(errno));
            free(line);
            return 0;
        }
       
        while ((fgets(line, line_size, proc)) != NULL) {
            if (strncmp(line, tag, line_size) == 0) {
                fclose(proc);
                free(line);
                return 1;
            }
            printf(line);
        }

        fclose(proc);
        //fseek(proc, 0, SEEK_SET);
        //fflush(proc);
        usleep(100*1000);
    }
   
    free(line);
    return 0;
}

int main(void)
{
    return check_wlan_chip("driver=live", 20);
}