77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
/* Get directory entries. Linux LFS version.
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Copyright (C) 1997-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<http://www.gnu.org/licenses/>. */
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#include <string.h>
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#include <dirent.h>
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#include <errno.h>
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/* The kernel struct linux_dirent64 matches the 'struct getdents64' type. */
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ssize_t
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__getdents64 (int fd, char *buf, size_t nbytes)
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{
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return INLINE_SYSCALL_CALL (getdents64, fd, buf, nbytes);
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}
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#if _DIRENT_MATCHES_DIRENT64
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strong_alias (__getdents64, __getdents)
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#else
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# include <shlib-compat.h>
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# if SHLIB_COMPAT(libc, GLIBC_2_1, GLIBC_2_2)
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# include <olddirent.h>
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/* kernel definition of as of 3.2. */
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struct compat_linux_dirent
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{
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/* Both d_ino and d_off are compat_ulong_t which are defined in all
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architectures as 'u32'. */
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uint32_t d_ino;
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uint32_t d_off;
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unsigned short d_reclen;
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char d_name[1];
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};
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ssize_t
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__old_getdents64 (int fd, char *buf, size_t nbytes)
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{
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ssize_t retval = INLINE_SYSCALL_CALL (getdents, fd, buf, nbytes);
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/* The kernel added the d_type value after the name. Change this now. */
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if (retval != -1)
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{
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union
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{
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struct compat_linux_dirent k;
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struct dirent u;
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} *kbuf = (void *) buf;
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while ((char *) kbuf < buf + retval)
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{
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char d_type = *((char *) kbuf + kbuf->k.d_reclen - 1);
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memmove (kbuf->u.d_name, kbuf->k.d_name,
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strlen (kbuf->k.d_name) + 1);
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kbuf->u.d_type = d_type;
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kbuf = (void *) ((char *) kbuf + kbuf->k.d_reclen);
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}
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}
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return retval;
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}
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# endif /* SHLIB_COMPAT(libc, GLIBC_2_1, GLIBC_2_2) */
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#endif /* _DIRENT_MATCHES_DIRENT64 */
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