2 * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
3 * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
4 * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
5 * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
6 * Copyright (c) 2005-2015 Dmitry V. Levin <ldv@altlinux.org>
7 * Copyright (c) 2015-2018 The strace developers.
10 * SPDX-License-Identifier: LGPL-2.1-or-later
16 #include "xlat/dirent_types.h"
18 #define D_NAME_LEN_MAX 256
22 /* the minimum size of a valid dirent64 structure */
23 const unsigned int d_name_offset = offsetof(struct dirent64, d_name);
25 unsigned int i, len, dents = 0;
29 printfd(tcp, tcp->u_arg[0]);
33 const unsigned int count = tcp->u_arg[2];
35 if (syserror(tcp) || !verbose(tcp)) {
37 printaddr(tcp->u_arg[1]);
38 tprintf(", %u", count);
42 /* Beware of insanely large or too small values in tcp->u_rval */
43 if (tcp->u_rval > 1024*1024)
45 else if (tcp->u_rval < (int) d_name_offset)
52 if (!buf || umoven(tcp, tcp->u_arg[1], len, buf) < 0) {
54 printaddr(tcp->u_arg[1]);
55 tprintf(", %u", count);
66 for (i = 0; len && i <= len - d_name_offset; ) {
67 struct dirent64 *d = (struct dirent64 *) &buf[i];
70 if (d->d_reclen >= d_name_offset
71 && i + d->d_reclen <= len) {
72 d_name_len = d->d_reclen - d_name_offset;
74 d_name_len = len - i - d_name_offset;
76 if (d_name_len > D_NAME_LEN_MAX)
77 d_name_len = D_NAME_LEN_MAX;
79 tprintf("%s{d_ino=%" PRIu64 ", d_off=%" PRId64
80 ", d_reclen=%u, d_type=",
85 printxval(dirent_types, d->d_type, "DT_???");
88 print_quoted_cstring(d->d_name, d_name_len);
92 if (d->d_reclen < d_name_offset) {
93 tprints_comment("d_reclen < offsetof(struct dirent64, d_name)");
102 tprintf_comment("%u entries", dents);
103 tprintf(", %u", count);