C语言实现获取文件大小、创建时间、修改时间(stat结构体)

源代码:

#include 
#include 
#include 
#include 
#include 
#include 

#define EXE_ABORT() {system("pause");return 0;}
#define FILEPATH "./test.txt"

int main(int argc, char *argv[])
{
    FILE *fp_i;
    int i = 0;
    int ret = 0;
    char buf[128];

    struct stat stat_i;
    struct tm *tm_p;

    ret = stat((const char *)FILEPATH, &stat_i);
    if(ret != 0)
    {
        printf("%s: get file stat failed", FILEPATH);
        EXE_ABORT();
    }
    
    printf("get file stat success\n");
    //! 文件的大小,字节为单位
    printf("文件大小: %.02f MB (%d Bytes)\n", stat_i.st_size / 1024.0, stat_i.st_size);

    // printf("文件创建时间   : %s", ctime(&stat_i.st_ctime));//Wed Nov 01 19:59:32 2023
    // printf("最后一次修改时间: %s", ctime(&stat_i.st_mtime));//Wed Nov 01 19:59:36 2023
    // printf("最近一次访问时间: %s", ctime(&stat_i.st_atime));//Wed Nov 01 19:59:36 2023

    tm_p = localtime(&stat_i.st_ctime);
    memset(buf, 0, sizeof(buf)/sizeof(buf[0])); //2023-11-01 19:59:32
    strftime(buf, 128, "%Y-%m-%d %X", tm_p);
    printf("文件创建时间    : %s\n", buf);

    tm_p = localtime(&stat_i.st_mtime);
    memset(buf, 0, sizeof(buf)/sizeof(buf[0]));
    strftime(buf, 128, "%Y-%m-%d %X", tm_p);
    printf("最后一次修改时间: %s\n", buf);

    tm_p = localtime(&stat_i.st_atime);
    memset(buf, 0, sizeof(buf)/sizeof(buf[0]));
    strftime(buf, 128, "%Y-%m-%d %X", tm_p);
    printf("最近一次访问时间: %s\n", buf);

    system("pause");
    return 0;
}

编译输出:

$ ./a.exe

get file stat success
文件大小: 0.01 MB (10 Bytes)
文件创建时间    : 2023-11-01 19:59:32
最后一次修改时间: 2023-11-01 19:59:36
最近一次访问时间: 2023-11-01 19:59:36

结构体原型:

struct stat  
{   
    dev_t       st_dev;     /* ID of device containing file -文件所在设备的ID*/  
    ino_t       st_ino;     /* inode number -inode节点号*/    
    mode_t      st_mode;    /* protection -保护模式?*/    
    nlink_t     st_nlink;   /* number of hard links -链向此文件的连接数(硬连接)*/    
    uid_t       st_uid;     /* user ID of owner -user id*/    
    gid_t       st_gid;     /* group ID of owner - group id*/    
    dev_t       st_rdev;    /* device ID (if special file) -设备号,针对设备文件*/    
    off_t       st_size;    /* total size, in bytes -文件大小,字节为单位*/    
    blksize_t   st_blksize; /* blocksize for filesystem I/O -系统块的大小*/    
    blkcnt_t    st_blocks;  /* number of blocks allocated -文件所占块数*/    
    time_t      st_atime;   /* time of last access -最近存取时间*/    
    time_t      st_mtime;   /* time of last modification -最近修改时间*/    
    time_t      st_ctime;   /* time of last status change - */    
}; 

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