hardlink

问题 I am creating an app in which I would like to make use of hardlinks and symlinks in the Android external memory filesystem. I have tried using the commands Os.link("oldpath", "newpath"); Os.link("oldpath", "newpath"); However, when I try this, I get this error: link failed: EPERM (Operation not permitted) This makes me think that you need root access, although I have seen other people do this same thing, and I would not think that they would have these commands if they needed root. Any ideas?

问题 My OS is linux. I program in C. I know I can use the lstat() to recognize the soft link, i.e., use S_ISLNK(st.st_mode). But how can I recognize the link is hard link? if the link is hard link, it will be thought of as regular file. However, I also want to distinguish the regular file from the hard link. Are there any ways to handle this case? 回答1: But how can I recognize the link is hard link? You can't. A "hard link" isn't actually anything special. It's just a directory entry that happens

问题 I have an Android app with some C code that uses the link(2) system call to create a hard link to an existing file. When I execute the app on Android 5.0.2, this part of the app works. When I execute the exact same app on an Android-M device the link() system call returns -1 "permission denied". I notice in my log getting messages like this: 09-02 17:10:34.222 5291 5291 W ona.crackerjack: type=1400 audit(0.0:59): avc: denied { link } for name="fixed28" dev="mmcblk0p28" ino=82829 scontext=u:r

问题 I've been playing around a lot recently with manipulating reparse points programmatically, and something's been bugging me for a little while now. Since Windows hard links aren't reparse points like junctions or symbolic links, they can't be accessed the same way. Creating a new one is easy enough, but I've yet to figure out how to read the target of one. Since extensions like Hard Link Shell Extension have property sheets displaying that information, I assume it can be done, but I've been

问题 I've been playing around a lot recently with manipulating reparse points programmatically, and something's been bugging me for a little while now. Since Windows hard links aren't reparse points like junctions or symbolic links, they can't be accessed the same way. Creating a new one is easy enough, but I've yet to figure out how to read the target of one. Since extensions like Hard Link Shell Extension have property sheets displaying that information, I assume it can be done, but I've been

问题 I've been playing around a lot recently with manipulating reparse points programmatically, and something's been bugging me for a little while now. Since Windows hard links aren't reparse points like junctions or symbolic links, they can't be accessed the same way. Creating a new one is easy enough, but I've yet to figure out how to read the target of one. Since extensions like Hard Link Shell Extension have property sheets displaying that information, I assume it can be done, but I've been

问题 I know there is function FindFirstNameW but it works only from Vista up. 来源： https://stackoverflow.com/questions/9518126/how-to-find-all-hard-links-to-a-file-in-windows-starting-from-xp-in-c

问题 I have a difference between files size and used disk space (total file size is even more than disk size). I suppose because there are many hard links exist (to WinSxS components) in Windows 7/Vista. But how can I programmatically distinguish hard links from real files in Windows 7? 回答1: You can't, because all files are hard links. No. Really. A file is just a hard link to a data chunk -- a listing in a directory. (Perhaps you mean symlinks? You can distinguish those...) Use the builtin

问题 To fix a bug in this answer: What's the correct name of the function to create a hard link in MSVCRT? 回答1: Oddly enough, there's a function called CreateHardLink. But it doesn't live in MSVCRT; it's part of Kernel32. 来源： https://stackoverflow.com/questions/6015006/whats-the-name-of-the-create-hard-link-function-in-msvcrt

问题 According to the man page for FileInfo, the following information is available when stat() ing a file in Go: type FileInfo interface { Name() string // base name of the file Size() int64 // length in bytes for regular files; system-dependent for others Mode() FileMode // file mode bits ModTime() time.Time // modification time IsDir() bool // abbreviation for Mode().IsDir() Sys() interface{} // underlying data source (can return nil) } How can I retrieve the number of hard links to a specific