C语言实现删除文件夹及其包含的所有文件和子文件夹的方法详解

#include <stdio.h>
#include <dirent.h> // 提供opendir、readdir等用于读取目录的功能
#include <sys/stat.h> // 提供stat、rmdir等功能判断是否为目录及移除目录
#include <unistd.h> // 提供unlink用来删除普通文件

// 删除指定路径下的单个文件
int remove_file(const char *filename) {
if (remove(filename)) {
perror("Error deleting file");
return -1;
}
printf("%s deleted successfully.\n", filename);
return 0;
}

// 遍历并删除directory中的所有文件/子目录
void delete_files_in_dir(DIR* dirp, const char *dir_name) {
struct dirent *dp;

while ((dp = readdir(dirp))) {
// 忽略"." 和 ".."
if (!strcmp(dp->d_name,".") || !strcmp(dp->d_name,"..")) continue;

char full_path[strlen(dir_name)+strlen(dp->d_name)+2];
sprintf(full_path,"%s/%s", dir_name, dp->d_name);

struct stat info;
lstat(full_path,&info);

if(S_ISDIR(info.st_mode)){ // 如果当前项是个目录
DIR *sub_dp = opendir(full_path);

if(sub_dp){ // 进入该子目录继续遍历删除
delete_files_in_dir(sub_dp, full_path);

closedir(sub_dp);

rmdir(full_path); // 子目录清空后才能成功删除此子目录
printf("%s removed\n",full_path);
} else{
fprintf(stderr, "Cannot open directory: %s\n", strerror(errno));
}
}else{ // 是常规文件则直接删除
if(remove_file(full_path)){
break; // 若有错误发生可选择终止或者记录日志然后继续
}
}
}

closedir(dirp);
}

// 主入口：删除整个目录及其内含的所有文件和子目录
int main(int argc, char **argv){
if(argc != 2){
fprintf(stderr, "Usage: %s dirname\n", argv[0]);
exit(EXIT_FAILURE);
}

DIR *dr = opendir(argv[1]);

if(dr == NULL){
fprintf(stderr, "%s is not a valid directory!\n", argv[1]);
exit(EXIT_FAILURE);
}

delete_files_in_dir(dr, argv[1]);
}