You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
127 lines
3.7 KiB
127 lines
3.7 KiB
/*
|
|
* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
|
|
* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
|
|
* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
|
|
* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
|
|
* Copyright (c) 2005-2015 Dmitry V. Levin <ldv@altlinux.org>
|
|
* Copyright (c) 2015-2017 The strace developers.
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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 "defs.h"
|
|
#include <dirent.h>
|
|
|
|
#include "xlat/dirent_types.h"
|
|
|
|
#define D_NAME_LEN_MAX 256
|
|
|
|
SYS_FUNC(getdents64)
|
|
{
|
|
/* the minimum size of a valid dirent64 structure */
|
|
const unsigned int d_name_offset = offsetof(struct dirent64, d_name);
|
|
|
|
unsigned int i, len, dents = 0;
|
|
char *buf;
|
|
|
|
if (entering(tcp)) {
|
|
printfd(tcp, tcp->u_arg[0]);
|
|
return 0;
|
|
}
|
|
|
|
const unsigned int count = tcp->u_arg[2];
|
|
|
|
if (syserror(tcp) || !verbose(tcp)) {
|
|
tprints(", ");
|
|
printaddr(tcp->u_arg[1]);
|
|
tprintf(", %u", count);
|
|
return 0;
|
|
}
|
|
|
|
/* Beware of insanely large or too small values in tcp->u_rval */
|
|
if (tcp->u_rval > 1024*1024)
|
|
len = 1024*1024;
|
|
else if (tcp->u_rval < (int) d_name_offset)
|
|
len = 0;
|
|
else
|
|
len = tcp->u_rval;
|
|
|
|
if (len) {
|
|
buf = malloc(len);
|
|
if (!buf || umoven(tcp, tcp->u_arg[1], len, buf) < 0) {
|
|
tprints(", ");
|
|
printaddr(tcp->u_arg[1]);
|
|
tprintf(", %u", count);
|
|
free(buf);
|
|
return 0;
|
|
}
|
|
} else {
|
|
buf = NULL;
|
|
}
|
|
|
|
tprints(",");
|
|
if (!abbrev(tcp))
|
|
tprints(" [");
|
|
for (i = 0; len && i <= len - d_name_offset; ) {
|
|
struct dirent64 *d = (struct dirent64 *) &buf[i];
|
|
if (!abbrev(tcp)) {
|
|
int d_name_len;
|
|
if (d->d_reclen >= d_name_offset
|
|
&& i + d->d_reclen <= len) {
|
|
d_name_len = d->d_reclen - d_name_offset;
|
|
} else {
|
|
d_name_len = len - i - d_name_offset;
|
|
}
|
|
if (d_name_len > D_NAME_LEN_MAX)
|
|
d_name_len = D_NAME_LEN_MAX;
|
|
|
|
tprintf("%s{d_ino=%" PRIu64 ", d_off=%" PRId64
|
|
", d_reclen=%u, d_type=",
|
|
i ? ", " : "",
|
|
d->d_ino,
|
|
d->d_off,
|
|
d->d_reclen);
|
|
printxval(dirent_types, d->d_type, "DT_???");
|
|
|
|
tprints(", d_name=");
|
|
print_quoted_cstring(d->d_name, d_name_len);
|
|
|
|
tprints("}");
|
|
}
|
|
if (d->d_reclen < d_name_offset) {
|
|
tprints_comment("d_reclen < offsetof(struct dirent64, d_name)");
|
|
break;
|
|
}
|
|
i += d->d_reclen;
|
|
dents++;
|
|
}
|
|
if (!abbrev(tcp))
|
|
tprints("]");
|
|
else
|
|
tprintf_comment("%u entries", dents);
|
|
tprintf(", %u", count);
|
|
free(buf);
|
|
return 0;
|
|
}
|