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Index: sys/compat/linux/linux_file.c
===================================================================
--- sys/compat/linux/linux_file.c
+++ sys/compat/linux/linux_file.c
@@ -1738,8 +1738,14 @@
char *path;
int error, dfd, flag;
- if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW)
+ if (args->flag & LINUX_AT_EMPTY_PATH)
+ return (kern_fchown(td, args->dfd, args->uid, args->gid));
+
+ if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW) {
+ linux_msg(td, "fchownat unsupported flag 0x%x",
+ args->flag);
return (EINVAL);
+ }
dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) == 0 ? 0 :
Index: sys/kern/vfs_syscalls.c
===================================================================
--- sys/kern/vfs_syscalls.c
+++ sys/kern/vfs_syscalls.c
@@ -3023,16 +3023,23 @@
#endif
int
sys_fchown(struct thread *td, struct fchown_args *uap)
+{
+
+ return (kern_fchown(td, uap->fd, uap->uid, uap->gid));
+}
+
+int
+kern_fchown(struct thread *td, int fd, int uid, int gid)
{
struct file *fp;
int error;
- AUDIT_ARG_FD(uap->fd);
- AUDIT_ARG_OWNER(uap->uid, uap->gid);
- error = fget(td, uap->fd, &cap_fchown_rights, &fp);
+ AUDIT_ARG_FD(fd);
+ AUDIT_ARG_OWNER(uid, gid);
+ error = fget(td, fd, &cap_fchown_rights, &fp);
if (error != 0)
return (error);
- error = fo_chown(fp, uap->uid, uap->gid, td->td_ucred, td);
+ error = fo_chown(fp, uid, gid, td->td_ucred, td);
fdrop(fp, td);
return (error);
}
Index: sys/sys/syscallsubr.h
===================================================================
--- sys/sys/syscallsubr.h
+++ sys/sys/syscallsubr.h
@@ -134,6 +134,7 @@
struct mac *mac_p, struct vmspace *oldvmspace);
int kern_fchmodat(struct thread *td, int fd, const char *path,
enum uio_seg pathseg, mode_t mode, int flag);
+int kern_fchown(struct thread *td, int fd, int uid, int gid);
int kern_fchownat(struct thread *td, int fd, const char *path,
enum uio_seg pathseg, int uid, int gid, int flag);
int kern_fcntl(struct thread *td, int fd, int cmd, intptr_t arg);

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