diff options
Diffstat (limited to 'lib/libc/sys/getdirentries.c')
| -rw-r--r-- | lib/libc/sys/getdirentries.c | 114 |
1 files changed, 0 insertions, 114 deletions
diff --git a/lib/libc/sys/getdirentries.c b/lib/libc/sys/getdirentries.c deleted file mode 100644 index 92f43e74cab7..000000000000 --- a/lib/libc/sys/getdirentries.c +++ /dev/null @@ -1,114 +0,0 @@ -/*- - * Copyright (c) 2017 M. Warner Losh <imp@FreeBSD.org> - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <sys/cdefs.h> -#define _WANT_FREEBSD11_DIRENT - -#include "namespace.h" -#include <sys/param.h> -#include <sys/syscall.h> -#include "compat-ino64.h" -#include <dirent.h> -#include <errno.h> -#include <stddef.h> -#include <stdlib.h> -#include <stdio.h> -#include <string.h> -#include <unistd.h> -#include "libc_private.h" - -static ssize_t -__cvt_dirents_from11(const char *de11, ssize_t len11, char *de, ssize_t len) -{ - struct dirent *dst; - const struct freebsd11_dirent *src; - const char *edst, *esrc; - ssize_t rlen; - - src = (const struct freebsd11_dirent *)de11; - dst = (struct dirent *)de; - esrc = de11 + len11; - edst = de + len; - while ((const char *)src < esrc && (const char *)dst < edst) { - rlen = roundup(offsetof(struct dirent, d_name) + src->d_namlen + 1, 8); - if ((const char *)dst + rlen >= edst) - break; - dst->d_fileno = src->d_fileno; - dst->d_off = 0; /* nothing uses it yet, so safe for now */ - dst->d_reclen = rlen; - dst->d_type = src->d_type; - dst->d_pad0 = 0; - dst->d_namlen = src->d_namlen; - dst->d_pad1 = 0; - memset(dst->d_name, 0, roundup(src->d_namlen + 1, 8)); - memcpy(dst->d_name, src->d_name, src->d_namlen); - dst = (struct dirent *)((char *)dst + rlen); - src = (const struct freebsd11_dirent *)((const char *)src + src->d_reclen); - } - return ((char *)dst - de); -} - -#undef getdirentries -__weak_reference(_getdirentries, getdirentries); - -#pragma weak _getdirentries -ssize_t -_getdirentries(int fd, char *buf, size_t nbytes, off_t *basep) -{ - char *oldbuf; - size_t len; - ssize_t rv; - - if (__getosreldate() >= INO64_FIRST) - return (__sys_getdirentries(fd, buf, nbytes, basep)); - - /* - * Because the old system call returns entries that are smaller than the - * new, we could wind up in a situation where we have too many to fit in - * the buffer with the new encoding. So sacrifice a small bit of - * efficiency to ensure that never happens. We pick 1/4 the size round - * up to the next DIRBLKSIZ. This will guarnatee enough room exists in - * the dst buffer due to changes in efficiency in packing dirent - * entries. We don't check against minimum block size to avoid a lot of - * stat calls, we'll see if that's wise or not. - * TBD: Will this difference matter to lseek? - */ - len = roundup(nbytes / 4, DIRBLKSIZ); - oldbuf = malloc(len); - if (oldbuf == NULL) { - errno = EINVAL; /* ENOMEM not in possible list */ - return (-1); - } - rv = syscall(SYS_freebsd11_getdirentries, fd, oldbuf, len, basep); - if (rv == -1) { - free(oldbuf); - return (rv); - } - if (rv > 0) - rv = __cvt_dirents_from11(oldbuf, rv, buf, nbytes); - free(oldbuf); - - return (rv); -} |