c語言删除檔案remove_如何在不使用C程式中的remove系統調用的情況下删除檔案？...

I've been curious how rem in Linux works and trying to write my own C code that can delete a file but when I searched for the answer, I only got the programs that were using remove() system call.

Is there any other way of doing it without using system call like writing your own code to do the job?

I've accomplished copying file through C filing but can't find a solution to delete a file through C.

解決方案

If you want to delete a file use the

remove

function. If you want to have a look behind the scenes of the standard library, you may download the source of the glibc (e.g.) and have a look at the implementation. You will see that actually a INTERNAL_SYSCALL will be performed on linux os:

result = INTERNAL_SYSCALL (unlink, err, 1, file);

(from /sysdeps/unix/sysv/linux/unlinkat.c from the debian eglibc-2.15 package)

If you want to go further and even not use that syscall you will have to implement your own file system logic since the file system syscall just gives an abstraction layer to different filesystems.