Linux copendir函数的参数解释

int cop*logdir(DIR *src_dirp, <span>const char *dest_dir, int flags)</span>;

#<span>include <stdio.h></span>
#<span>include <stdlib.h></span>
#<span>include <dirent.h></span>
#<span>include <sys/stat.h></span>
#<span>include <unistd.h></span>

int cop*logdir(DIR *src_dirp, <span>const char *dest_dir, int flags)</span> {
    <span>struct dirent *entry;</span>
    <span>struct stat statbuf;</span>
    char src_path[PATH_MAX], dest_path[PATH_MAX];

    while ((entry = readdir(src_dirp)) != NULL) {
        if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0)
            continue;

        snprintf(src_path, sizeof(src_path), "%s/%s", src_dirp->dd_name, entry->d_name);
        snprintf(dest_path, sizeof(dest_path), "%s/%s", dest_dir, entry->d_name);

        if (lstat(src_path, &statbuf) == -1)
            return -1;

        if (S_ISDIR(statbuf.st_mode)) {
            if (mkdir(dest_path, statbuf.st_mode) == -1)
                return -1;
            DIR *subdir = opendir(src_path);
            if (subdir == NULL)
                return -1;
            if (cop*logdir(subdir, dest_path, flags) == -1)
                return -1;
            closedir(subdir);
        } else {
            FILE *src_file = fopen(src_path, "rb");
            if (src_file == NULL)
                return -1;

            FILE *dest_file = fopen(dest_path, "wb");
            if (dest_file == NULL)
                return -1;

            char buffer[4096];
            size_t bytes_read;
            while ((bytes_read = fread(buffer, 1, sizeof(buffer), src_file)) > 0) {
                if (fwrite(buffer, 1, bytes_read, dest_file) != bytes_read)
                    return -1;
            }

            fclose(src_file);
            fclose(dest_file);
        }
    }

    return 0;
}

int main(<span>int argc, char *argv[])</span> {
    if (argc != 3) {
        fprintf(stderr, "Usage: %s <source_directory> <destination_directory>\n", argv[0]);
        return 1;
    }

    DIR *src_dirp = opendir(argv[1]);
    if (src_dirp == NULL) {
        perror("opendir");
        return 1;
    }

    if (mkdir(argv[2], 0755) == -1 && errno != EEXIST) {
        perror("mkdir");
        closedir(src_dirp);
        return 1;
    }

    if (cop*logdir(src_dirp, argv[2], 0) == -1) {
        perror("cop*logdir");
        closedir(src_dirp);
        return 1;
    }

    closedir(src_dirp);
    return 0;
}