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Diffstat (limited to 'sysdeps/posix/shm-directory.h')
| -rw-r--r-- | sysdeps/posix/shm-directory.h | 66 |
1 files changed, 0 insertions, 66 deletions
diff --git a/sysdeps/posix/shm-directory.h b/sysdeps/posix/shm-directory.h deleted file mode 100644 index 5c70e1a71e..0000000000 --- a/sysdeps/posix/shm-directory.h +++ /dev/null @@ -1,66 +0,0 @@ -/* Header for directory for shm/sem files. - Copyright (C) 2014-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#ifndef _SHM_DIRECTORY_H - -#include <errno.h> -#include <limits.h> -#include <stdbool.h> -#include <stdlib.h> -#include <string.h> - -extern const char *__shm_directory (size_t *len); - -/* This defines local variables SHM_DIR and SHM_DIRLEN, giving the - directory prefix (with trailing slash) and length (not including '\0' - terminator) of the directory used for shm files. If that cannot be - determined, it sets errno to ENOSYS and returns RETVAL_FOR_INVALID. - - This uses the local variable NAME as an lvalue, and increments it past - any leading slashes. It then defines the local variable NAMELEN, giving - strlen (NAME) + 1. If NAME is invalid, it sets errno to - ERRNO_FOR_INVALID and returns RETVAL_FOR_INVALID. Finally, it defines - the local variable SHM_NAME, giving the absolute file name of the shm - file corresponding to NAME. PREFIX is a string constant used as a - prefix on NAME. */ - -#define SHM_GET_NAME(errno_for_invalid, retval_for_invalid, prefix) \ - size_t shm_dirlen; \ - const char *shm_dir = __shm_directory (&shm_dirlen); \ - /* If we don't know what directory to use, there is nothing we can do. */ \ - if (__glibc_unlikely (shm_dir == NULL)) \ - { \ - __set_errno (ENOSYS); \ - return retval_for_invalid; \ - } \ - /* Construct the filename. */ \ - while (name[0] == '/') \ - ++name; \ - size_t namelen = strlen (name) + 1; \ - /* Validate the filename. */ \ - if (namelen == 1 || namelen >= NAME_MAX || strchr (name, '/') != NULL) \ - { \ - __set_errno (errno_for_invalid); \ - return retval_for_invalid; \ - } \ - char *shm_name = __alloca (shm_dirlen + sizeof prefix - 1 + namelen); \ - __mempcpy (__mempcpy (__mempcpy (shm_name, shm_dir, shm_dirlen), \ - prefix, sizeof prefix - 1), \ - name, namelen) - -#endif /* shm-directory.h */ |