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#include <stdio.h>

#include <fcntl.h>

#include <sys/stat.h>

void print_struct_stat(char *msg, struct stat *s)

{

    printf("%s\n", msg);

    /* The casts are because glibc thinks it's cool */

    printf("device    : 0x%llx\n",(long long)s->st_dev);

    printf("inode     : %lld\n",  (long long)s->st_ino);

    printf("mode      : 0x%llx\n",(long long)s->st_mode);

    printf("nlink     : %lld\n",  (long long)s->st_nlink);

    printf("uid       : %lld\n",  (long long)s->st_uid);

    printf("gid       : %lld\n",  (long long)s->st_gid);

    printf("rdev      : 0x%llx\n",(long long)s->st_rdev);

    printf("size      : %lld\n",  (long long)s->st_size);

    printf("blksize   : %lld\n",  (long long)s->st_blksize);

    printf("blocks    : %lld\n",  (long long)s->st_blocks);

    printf("atime     : %lld\n",  (long long)s->st_atime);

    printf("mtime     : %lld\n",  (long long)s->st_mtime);

    printf("ctime     : %lld\n",  (long long)s->st_ctime);

}

int main(int argc,char **argv)

{

    int fd, ret;

    char *file;

    struct stat s;

    if (argc < 2) {

        fprintf(stderr, "Usage: stat FILE\n");

        exit(1);

    }

    file = argv[1];

    memset(&s, 0, sizeof(struct stat));

    ret = stat(file, &s);

    if(ret<0){

        perror("stat");

        exit(1);

    }

    print_struct_stat("\nTesting stat:", &s);

    memset(&s, 0, sizeof(struct stat));

    ret = lstat(file, &s);

    if(ret<0){

        perror("lstat");

        exit(1);

    }

    print_struct_stat("\nTesting lstat:", &s);

    fd = open(file, O_RDONLY);

    if(fd<0){

        perror("open");

        exit(1);

    }

    memset(&s, 0, sizeof(struct stat));

    ret = fstat(fd,&s);

    if(ret<0){

        perror("fstat");

        exit(1);

    }

    print_struct_stat("\nTesting fstat:", &s);

    exit(0);

}