1 /*
2 * Copyright (c) 2008-2015 Dmitry V. Levin <ldv@altlinux.org>
3 * Copyright (c) 2015-2017 The strace developers.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include "defs.h"
30 #include <fcntl.h>
31 #ifdef HAVE_SYS_SIGNALFD_H
32 # include <sys/signalfd.h>
33 #endif
34
35 #include "xlat/sfd_flags.h"
36
37 static int
do_signalfd(struct tcb * tcp,int flags_arg)38 do_signalfd(struct tcb *tcp, int flags_arg)
39 {
40 /* NB: kernel requires arg[2] == NSIG_BYTES */
41 printfd(tcp, tcp->u_arg[0]);
42 tprints(", ");
43 print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[2]);
44 tprintf(", %" PRI_klu, tcp->u_arg[2]);
45 if (flags_arg >= 0) {
46 tprints(", ");
47 printflags(sfd_flags, tcp->u_arg[flags_arg], "SFD_???");
48 }
49
50 return RVAL_DECODED | RVAL_FD;
51 }
52
SYS_FUNC(signalfd)53 SYS_FUNC(signalfd)
54 {
55 return do_signalfd(tcp, -1);
56 }
57
SYS_FUNC(signalfd4)58 SYS_FUNC(signalfd4)
59 {
60 return do_signalfd(tcp, 3);
61 }
62