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VFS: Make chown() and lchown() call fchownat()

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Make the chown() and lchown() syscalls jump to the fchownat() syscall with the
appropriate extra arguments.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
David Howells 2012-06-25 12:55:09 +01:00 committed by Al Viro
parent c3c4f69424
commit 55e4def0a6
1 changed files with 7 additions and 34 deletions
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41
fs/open.c
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@ -537,25 +537,6 @@ static int chown_common(struct path *path, uid_t user, gid_t group)
return error; return error;
} }
SYSCALL_DEFINE3(chown, const char __user *, filename, uid_t, user, gid_t, group)
{
struct path path;
int error;
error = user_path(filename, &path);
if (error)
goto out;
error = mnt_want_write(path.mnt);
if (error)
goto out_release;
error = chown_common(&path, user, group);
mnt_drop_write(path.mnt);
out_release:
path_put(&path);
out:
return error;
}
SYSCALL_DEFINE5(fchownat, int, dfd, const char __user *, filename, uid_t, user, SYSCALL_DEFINE5(fchownat, int, dfd, const char __user *, filename, uid_t, user,
gid_t, group, int, flag) gid_t, group, int, flag)
{ {
@ -583,23 +564,15 @@ out:
return error; return error;
} }
SYSCALL_DEFINE3(chown, const char __user *, filename, uid_t, user, gid_t, group)
{
return sys_fchownat(AT_FDCWD, filename, user, group, 0);
}
SYSCALL_DEFINE3(lchown, const char __user *, filename, uid_t, user, gid_t, group) SYSCALL_DEFINE3(lchown, const char __user *, filename, uid_t, user, gid_t, group)
{ {
struct path path; return sys_fchownat(AT_FDCWD, filename, user, group,
int error; AT_SYMLINK_NOFOLLOW);
error = user_lpath(filename, &path);
if (error)
goto out;
error = mnt_want_write(path.mnt);
if (error)
goto out_release;
error = chown_common(&path, user, group);
mnt_drop_write(path.mnt);
out_release:
path_put(&path);
out:
return error;
} }
SYSCALL_DEFINE3(fchown, unsigned int, fd, uid_t, user, gid_t, group) SYSCALL_DEFINE3(fchown, unsigned int, fd, uid_t, user, gid_t, group)