Linux readdir如何实现文件修改时间排序

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

typedef <span>struct {</span>
    char name[256];
    time_t mtime;
} FileInfo;

int compare(<span>const void *a, const void *b)</span> {
    FileInfo *fileA = (FileInfo *)a;
    FileInfo *fileB = (FileInfo *)b;
    return difftime(fileA->mtime, fileB->mtime);
}

int main() {
    DIR *dir;
    <span>struct dirent *entry;</span>
    FileInfo files[1024];

    dir = opendir(".");
    if (dir == NULL) {
        perror("opendir");
        return 1;
    }

    int i = 0;
    while ((entry = readdir(dir)) != NULL) {
        if (entry->d_type == DT_REG) { // 只处理普通文件
            <span>struct stat statbuf;</span>
            char path[1024];

            snprintf(path, sizeof(path), "%s/%s", ".", entry->d_name);
            if (stat(path, &statbuf) == -1) {
                perror("stat");
                continue;
            }

            strncpy(files[i].name, entry->d_name, sizeof(files[i].name));
            files[i].mtime = statbuf.st_mtime;
            i++;
        }
    }

    closedir(dir);

    qsort(files, i, sizeof(FileInfo), compare);

    for (int j = 0; j < i; j++) {
        printf("%s: %s\n", files[j].name, ctime(&files[j].mtime));
    }

    return 0;
}