如何在C中通过命令行接受md5sum？

#include<stdio.h>
#include <stdlib.h>

int main() {
    FILE *fp;
    char path[100];
    char command[128];
    char result[33];

    printf("请输入文件路径：");
    scanf("%s", path);

    sprintf(command, "md5sum %s", path);
    fp = popen(command, "r");

    if (fp == NULL) {
        printf("无法执行命令\n");
        exit(1);
    }

    fgets(result, 33, fp);
    pclose(fp);

    printf("MD5SUM: %s", result);

    return 0;
}