在Ubuntu中,使用readdir
函数读取目录时,可以通过递归遍历目录并检查当前深度来限制读取深度。以下是一个简单的C语言示例,展示了如何使用readdir
函数限制读取深度:
#include#include #include #include #include void read_directory(const char *path, int depth) { if (depth < 0) { return; } DIR *dir = opendir(path); if (dir == NULL) { perror("opendir"); return; } struct dirent *entry; while ((entry = readdir(dir)) != NULL) { if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0) { continue; } char full_path[1024]; snprintf(full_path, sizeof(full_path), "%s/%s", path, entry->d_name); struct stat statbuf; if (stat(full_path, &statbuf) == -1) { perror("stat"); continue; } if (S_ISDIR(statbuf.st_mode)) { printf("Directory: %s\n", full_path); read_directory(full_path, depth - 1); } else { printf("File: %s\n", full_path); } } closedir(dir); } int main(int argc, char *argv[]) { if (argc != 3) { fprintf(stderr, "Usage: %s \n", argv[0]); return 1; } const char *path = argv[1]; int depth = atoi(argv[2]); read_directory(path, depth); return 0; }
在这个示例中,read_directory
函数接受两个参数:要读取的目录路径和最大深度。它会递归地遍历目录,并在达到最大深度时停止递归。
编译并运行此程序:
gcc -o read_directory_example read_directory_example.c ./read_directory_example /path/to/directory 2
将/path/to/directory
替换为要读取的目录路径,将2
替换为所需的最大深度。