linux下c语言编程lstat

在Linux下使用C语言编程，可以使用lstat函数获取文件的状态信息，其原型为：

int lstat(const char *pathname, struct stat *statbuf);

其中，pathname参数为要获取状态信息的文件路径，statbuf参数为存储获取到的状态信息的结构体指针。

示例代码如下：

#include <stdio.h>
#include <sys/stat.h>
#include <unistd.h>

int main(int argc, char *argv[]) {
    struct stat sb;
    if (argc != 2) {
        fprintf(stderr, "Usage: %s <pathname>\n", argv[0]);
        return 1;
    }
    if (lstat(argv[1], &sb) == -1) {
        perror("lstat");
        return 1;
    }
    printf("File type:                ");

    switch (sb.st_mode & S_IFMT) {
    case S_IFBLK:
        printf("block device\n");
        break;
    case S_IFCHR:
        printf("character device\n");
        break;
    case S_IFDIR:
        printf("directory\n");
        break;
    case S_IFIFO:
        printf("FIFO/pipe\n");
        break;
    case S_IFLNK:
        printf("symlink\n");
        break;
    case S_IFREG:
        printf("regular file\n");
        break;
    case S_IFSOCK:
        printf("socket\n");
        break;
    default:
        printf("unknown?\n");
        break;
    }

    printf("I-node number:            %ld\n", (long)sb.st_ino);
    printf("Mode:                     %lo (octal)\n", (unsigned long)sb.st_mode);
    printf("Link count:               %ld\n", (long)sb.st_nlink);
    printf("Ownership:                UID=%ld   GID=%ld\n", (long)sb.st_uid, (long)sb.st_gid);
    printf("Preferred I/O block size: %ld bytes\n", (long)sb.st_blksize);
    printf("File size:                %lld bytes\n", (long long)sb.st_size);
    printf("Blocks allocated:         %lld\n", (long long)sb.st_blocks);
    printf("Last status change:       %s", ctime(&sb.st_ctime));
    printf("Last file access:         %s", ctime(&sb.st_atime));
    printf("Last file modification:   %s", ctime(&sb.st_mtime));

    return 0;
}

该示例代码可以获取指定文件的状态信息，并输出到终端上。注意，在使用ctime函数输出时间时，需要将时间戳传入该函数，以获取可读性较好的时间格式。