Make the chown() and lchown() syscalls jump to the fchownat() syscall with the
appropriate extra arguments.
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
---
fs/open.c | 40 ++++++----------------------------------
1 files changed, 6 insertions(+), 34 deletions(-)
diff --git a/fs/open.c b/fs/open.c
index f711921..6d6cd90 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -527,25 +527,6 @@ static int chown_common(struct path *path, uid_t user, gid_t group)
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,
gid_t, group, int, flag)
{
@@ -573,23 +554,14 @@ out:
return error;
}
-SYSCALL_DEFINE3(lchown, const char __user *, filename, uid_t, user, gid_t, group)
+SYSCALL_DEFINE3(chown, const char __user *, filename, uid_t, user, gid_t, group)
{
- struct path path;
- int error;
+ return fchownat(AT_FDCWD, filename, user, group, 0);
+}
- 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(lchown, const char __user *, filename, uid_t, user, gid_t, group)
+{
+ return fchownat(AT_FDCWD, filename, user, group, AT_SYMLINK_NOFOLLOW);
}
SYSCALL_DEFINE3(fchown, unsigned int, fd, uid_t, user, gid_t, group)
--
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