remove - delete a name and possibly the file it refers to
int remove(const char *pathname));
remove deletes a name from the filesystem. If that name was
the last link to a file and no processes have the file open
the file is deleted and the space it was using is made
available for reuse.
If the name was the last link to a file but any processes
still have the file open the file will remain in existence
until the last file descriptor referring to it is closed.
If the name referred to a symbolic link the link is removed.
If the name referred to a socket, fifo or device the name
for it is removed but processes which have the object open
may continue to use it.
On success, zero is returned. On error, -1 is returned, and
errno is set appropriately.
EFAULT pathname points outside your accessible address
EACCES Write access to the directory containing pathname is
not allowed for the process's effective uid, or one
of the directories in pathname did not allow search
EPERM The directory containing pathname has the sticky-bit
(S_ISVTX) set and the process's effective uid is
neither the uid of the file to be deleted nor that
of the directory containing it.
pathname was too long.
ENOENT A directory component in pathname does not exist or
is a dangling symbolic link.
ENOTDIR A component used as a directory in pathname is not,
in fact, a directory.
EISDIR pathname refers to a directory.
ENOMEM Insufficient kernel memory was available.
EROFS pathname refers to a file on a read-only filesystem.
ANSI C, SVID, AT&T, POSIX, X/OPEN, BSD 4.3
In-felicities in the protocol underlying NFS can cause the
unexpected disappearance of files which are still being
unlink(2), rename(2), open(2), mknod(2), mkfifo(3), link(2),