c++ 获取文件或文件夹的创建日期
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Get the creation date of file or folder in c++
提问by user3202024
I want to write a program to get the details of files and folder I created including the creation date like this: Feb 15 2006 What should I do? Any suggestion? And I have to mentioned that I'm not allowed to use windows.h .
我想编写一个程序来获取我创建的文件和文件夹的详细信息，包括创建日期，如下所示：2006 年 2 月 15 日我该怎么办？有什么建议吗？我不得不提到我不允许使用 windows.h 。
回答by the swine
In Linux-like system, you can use the stat function, as such:
在类Linux 系统中，您可以使用 stat 函数，如下所示：
#include <sys/stat.h>
#include <time.h>
#include <stdio.h>
int main(int argc, char **argv)
{
struct stat t_stat;
stat("file_name", &t_stat);
struct tm * timeinfo = localtime(&t_stat.st_ctime); // or gmtime() depending on what you want
printf("File time and date: %s", asctime(timeinfo));
return 0;
}
In Windows, I'd suggest using the system() function and get file time from commandline:
在Windows 中，我建议使用 system() 函数并从命令行获取文件时间：
#include <stdlib.h>
int main(int argc, char **argv)
{
system("dir /T:C file_name");
return 0;
}
You can redirect output of system() to e.g. a temporary file and parse the date from there.
您可以将 system() 的输出重定向到例如临时文件并从那里解析日期。
Or use this workaround https://stackoverflow.com/a/40504396/1422630, that makes windows' _statcompatible with linux one stat, basically:
或使用此解决方法https://stackoverflow.com/a/40504396/1422630，这使 windows_stat与 linux one 兼容stat，基本上：
#ifdef WIN32
#define stat _stat
#endif
回答by James Kanze
The simple answer is that you can't. Depending on the system,
there may be a system specific function which will do this
(e.g. GetFileAttributesExunder Windows), but not all systems
even support it; Unix, for example, does notkeep this
information, and there is no way to obtain it on a Unix system
(or on a file system which is hosted on a Unix system—I
don't know what the Windows function will return if the file is
physically hosted on a Unix system).
简单的答案是你不能。根据系统的不同，可能会有一个系统特定的功能可以做到这一点（例如GetFileAttributesEx在 Windows 下），但并非所有系统都支持它；例如，Unix不保留此信息，并且无法在 Unix 系统上（或在 Unix 系统上托管的文件系统上获得它——我不知道 Windows 函数将返回什么，如果文件物理托管在 Unix 系统上）。
回答by SuRendra
#include <sys/stat.h>
#include <unistd.h>
#include <time.h>
struct tm* clock; // create a time structure
struct stat attrib; // create a file attribute structure
stat("afile.txt", &attrib); // get the attributes of afile.txt
clock = gmtime(&(attrib.st_mtime)); // Get the last modified time and put it into the time structure
// clock->tm_year returns the year (since 1900)
// clock->tm_mon returns the month (January = 0)
// clock->tm_mday returns the day of the month
