如何判断一个路径是否可写?

[梧桐168]

试图在拷贝文件到一个文件夹里之前判断这个文件夹是否可写,可有什么API可以直接调用的?

[ToperRay]

Determine file-access permission.

int _access(
const char *path,
int mode
);
int _waccess(
const wchar_t *path,
int mode
);
Parameters
path
File or directory path.
mode
Permission setting.
Return Value
Each function returns 0 if the file has the given mode. The function returns –1 if the named file does not exist or is not accessible in the given mode; in this case, errno is set as follows:

EACCES
Access denied: file's permission setting does not allow specified access.
ENOENT
Filename or path not found.

[梧桐168]

这个函数有点问题,my doucment的路径居然判断为不能写.