diff options
Diffstat (limited to 'sysdeps/generic/fd_to_filename.h')
| -rw-r--r-- | sysdeps/generic/fd_to_filename.h | 26 |
1 files changed, 18 insertions, 8 deletions
diff --git a/sysdeps/generic/fd_to_filename.h b/sysdeps/generic/fd_to_filename.h index eff6ca211b..5ca22f02bc 100644 --- a/sysdeps/generic/fd_to_filename.h +++ b/sysdeps/generic/fd_to_filename.h @@ -1,4 +1,4 @@ -/* Query filename corresponding to an open FD. Generic version. +/* Query filename corresponding to an open FD. Copyright (C) 2001-2020 Free Software Foundation, Inc. This file is part of the GNU C Library. @@ -16,12 +16,22 @@ License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ -#define FD_TO_FILENAME_SIZE 0 +#ifndef _FD_TO_FILENAME_H +#define _FD_TO_FILENAME_H -/* In general there is no generic way to query filename for an open - file descriptor. */ -static inline const char * -fd_to_filename (int fd, char *buf) +#include <arch-fd_to_filename.h> +#include <intprops.h> + +struct fd_to_filename { - return NULL; -} + /* A positive int value has at most 10 decimal digits. */ + char buffer[sizeof (FD_TO_FILENAME_PREFIX) + INT_STRLEN_BOUND (int)]; +}; + +/* Writes a /proc/self/fd-style path for DESCRIPTOR to *STORAGE and + returns a pointer to the start of the string. DESCRIPTOR must be + non-negative. */ +char *__fd_to_filename (int descriptor, struct fd_to_filename *storage) + attribute_hidden; + +#endif /* _FD_TO_FILENAME_H */ |