diff options
Diffstat (limited to 'sysdeps/posix/readdir_r.c')
| -rw-r--r-- | sysdeps/posix/readdir_r.c | 159 |
1 files changed, 0 insertions, 159 deletions
diff --git a/sysdeps/posix/readdir_r.c b/sysdeps/posix/readdir_r.c deleted file mode 100644 index 9079abc2ff..0000000000 --- a/sysdeps/posix/readdir_r.c +++ /dev/null @@ -1,159 +0,0 @@ -/* Copyright (C) 1991-2020 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 - <https://www.gnu.org/licenses/>. */ - -#include <errno.h> -#include <limits.h> -#include <stddef.h> -#include <string.h> -#include <dirent.h> -#include <unistd.h> -#include <sys/types.h> -#include <assert.h> - -#include <dirstream.h> - -#ifndef __READDIR_R -# define __READDIR_R __readdir_r -# define __GETDENTS __getdents -# define DIRENT_TYPE struct dirent -# define __READDIR_R_ALIAS -#endif - -/* Read a directory entry from DIRP. */ -int -__READDIR_R (DIR *dirp, DIRENT_TYPE *entry, DIRENT_TYPE **result) -{ - DIRENT_TYPE *dp; - size_t reclen; - const int saved_errno = errno; - int ret; - - __libc_lock_lock (dirp->lock); - - do - { - if (dirp->offset >= dirp->size) - { - /* We've emptied out our buffer. Refill it. */ - - size_t maxread; - ssize_t bytes; - -#ifndef _DIRENT_HAVE_D_RECLEN - /* Fixed-size struct; must read one at a time (see below). */ - maxread = sizeof *dp; -#else - maxread = dirp->allocation; -#endif - - bytes = __GETDENTS (dirp->fd, dirp->data, maxread); - if (bytes <= 0) - { - /* On some systems getdents fails with ENOENT when the - open directory has been rmdir'd already. POSIX.1 - requires that we treat this condition like normal EOF. */ - if (bytes < 0 && errno == ENOENT) - { - bytes = 0; - __set_errno (saved_errno); - } - if (bytes < 0) - dirp->errcode = errno; - - dp = NULL; - break; - } - dirp->size = (size_t) bytes; - - /* Reset the offset into the buffer. */ - dirp->offset = 0; - } - - dp = (DIRENT_TYPE *) &dirp->data[dirp->offset]; - -#ifdef _DIRENT_HAVE_D_RECLEN - reclen = dp->d_reclen; -#else - /* The only version of `struct dirent*' that lacks `d_reclen' - is fixed-size. */ - assert (sizeof dp->d_name > 1); - reclen = sizeof *dp; - /* The name is not terminated if it is the largest possible size. - Clobber the following byte to ensure proper null termination. We - read just one entry at a time above so we know that byte will not - be used later. */ - dp->d_name[sizeof dp->d_name] = '\0'; -#endif - - dirp->offset += reclen; - -#ifdef _DIRENT_HAVE_D_OFF - dirp->filepos = dp->d_off; -#else - dirp->filepos += reclen; -#endif - -#ifdef NAME_MAX - if (reclen > offsetof (DIRENT_TYPE, d_name) + NAME_MAX + 1) - { - /* The record is very long. It could still fit into the - caller-supplied buffer if we can skip padding at the - end. */ - size_t namelen = _D_EXACT_NAMLEN (dp); - if (namelen <= NAME_MAX) - reclen = offsetof (DIRENT_TYPE, d_name) + namelen + 1; - else - { - /* The name is too long. Ignore this file. */ - dirp->errcode = ENAMETOOLONG; - dp->d_ino = 0; - continue; - } - } -#endif - - /* Skip deleted and ignored files. */ - } - while (dp->d_ino == 0); - - if (dp != NULL) - { - *result = memcpy (entry, dp, reclen); -#ifdef _DIRENT_HAVE_D_RECLEN - entry->d_reclen = reclen; -#endif - ret = 0; - } - else - { - *result = NULL; - ret = dirp->errcode; - } - - __libc_lock_unlock (dirp->lock); - - return ret; -} - -#ifdef __READDIR_R_ALIAS -weak_alias (__readdir_r, readdir_r) -#endif - -#undef __READDIR_R -#undef __GETDENTS -#undef DIRENT_TYPE -#undef __READDIR_R_ALIAS |