On 14.09.2019 23:34, Christos Zoulas wrote: > Comments? > Question. How does it handle symbolic/hardlinks?
> christos
>
>
> Index: kern/sys_descrip.c
> ===================================================================
> RCS file: /cvsroot/src/sys/kern/sys_descrip.c,v
> retrieving revision 1.34
> diff -u -p -u -r1.34 sys_descrip.c
> --- kern/sys_descrip.c 26 Aug 2019 10:19:08 -0000 1.34
> +++ kern/sys_descrip.c 14 Sep 2019 21:33:29 -0000
> @@ -315,6 +312,28 @@ do_fcntl_lock(int fd, int cmd, struct fl
> return error;
> }
>
> +static int
> +do_fcntl_getpath(struct lwp *l, file_t *fp, char *upath)
> +{
> + char *kpath;
> + int error;
> +
> + if (fp->f_type != DTYPE_VNODE)
> + return EOPNOTSUPP;
> +
> + kpath = PNBUF_GET();
> +
> + error = vnode_to_path(kpath, MAXPATHLEN, fp->f_vnode, l, l->l_proc);
> + if (error)
> + goto out;
> +
> + error = copyoutstr(kpath, upath, MAXPATHLEN, NULL);
> +out:
> + PNBUF_PUT(kpath);
> +
> + return error;
> +}
> +
> /*
> * The file control system call.
> */
> @@ -463,6 +482,10 @@ sys_fcntl(struct lwp *l, const struct sy
> error = (*fp->f_ops->fo_ioctl)(fp, FIOSETOWN, &tmp);
> break;
>
> + case F_GETPATH:
> + error = do_fcntl_getpath(l, fp, SCARG(uap, arg));
> + break;
> +
> default:
> error = EINVAL;
> }
> Index: sys/fcntl.h
> ===================================================================
> RCS file: /cvsroot/src/sys/sys/fcntl.h,v
> retrieving revision 1.50
> diff -u -p -u -r1.50 fcntl.h
> --- sys/fcntl.h 20 Feb 2018 18:20:05 -0000 1.50
> +++ sys/fcntl.h 14 Sep 2019 21:33:29 -0000
> @@ -193,6 +195,7 @@
> #define F_DUPFD_CLOEXEC 12 /* close on exec duplicated fd
> */
> #define F_GETNOSIGPIPE 13 /* get SIGPIPE disposition */
> #define F_SETNOSIGPIPE 14 /* set SIGPIPE disposition */
> +#define F_GETPATH 15 /* get pathname assosiated with
> file */
> #endif
>
> /* file descriptor flags (F_GETFD, F_SETFD) */
>
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