10 判断文件是否存在

#include <unistd.h>
#include <stdio.h>
#include <stdbool.h>
bool fileExists(const char *pathname) {
    return access(pathname, F_OK) == 0;
}
int main(int argc, char **argv) {
    printf("/data exists: %d\n", fileExists("/data"));
    printf("/test exists: %d\n", fileExists("/test"));
    printf("/data/redis-master/Makefile exists: %d\n", fileExists("/data/redis-master/Makefile"));
    return 0;
}