1 /* 2 * Copyright (c) 2008-2015 Dmitry V. Levin <ldv (at) 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 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 53 SYS_FUNC(signalfd) 54 { 55 return do_signalfd(tcp, -1); 56 } 57 58 SYS_FUNC(signalfd4) 59 { 60 return do_signalfd(tcp, 3); 61 } 62
