1.\" 2.\" Sun Microsystems, Inc. gratefully acknowledges The Open Group for 3.\" permission to reproduce portions of its copyrighted documentation. 4.\" Original documentation from The Open Group can be obtained online at 5.\" http://www.opengroup.org/bookstore/. 6.\" 7.\" The Institute of Electrical and Electronics Engineers and The Open 8.\" Group, have given us permission to reprint portions of their 9.\" documentation. 10.\" 11.\" In the following statement, the phrase ``this text'' refers to portions 12.\" of the system documentation. 13.\" 14.\" Portions of this text are reprinted and reproduced in electronic form 15.\" in the SunOS Reference Manual, from IEEE Std 1003.1, 2004 Edition, 16.\" Standard for Information Technology -- Portable Operating System 17.\" Interface (POSIX), The Open Group Base Specifications Issue 6, 18.\" Copyright (C) 2001-2004 by the Institute of Electrical and Electronics 19.\" Engineers, Inc and The Open Group. In the event of any discrepancy 20.\" between these versions and the original IEEE and The Open Group 21.\" Standard, the original IEEE and The Open Group Standard is the referee 22.\" document. The original Standard can be obtained online at 23.\" http://www.opengroup.org/unix/online.html. 24.\" 25.\" This notice shall appear on any product containing this material. 26.\" 27.\" The contents of this file are subject to the terms of the 28.\" Common Development and Distribution License (the "License"). 29.\" You may not use this file except in compliance with the License. 30.\" 31.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 32.\" or http://www.opensolaris.org/os/licensing. 33.\" See the License for the specific language governing permissions 34.\" and limitations under the License. 35.\" 36.\" When distributing Covered Code, include this CDDL HEADER in each 37.\" file and include the License file at usr/src/OPENSOLARIS.LICENSE. 38.\" If applicable, add the following below this CDDL HEADER, with the 39.\" fields enclosed by brackets "[]" replaced with your own identifying 40.\" information: Portions Copyright [yyyy] [name of copyright owner] 41.\" 42.\" 43.\" Copyright (c) 2001, The IEEE and The Open Group. All Rights Reserved. 44.\" Portions Copyright (c) 2004, Sun Microsystems, Inc. All Rights Reserved. 45.\" Copyright 2026 Oxide Computer Company 46.\" 47.Dd July 4, 2026 48.Dt POSIX_SPAWNATTR_GETSIGDEFAULT 3C 49.Os 50.Sh NAME 51.Nm posix_spawnattr_getsigdefault , 52.Nm posix_spawnattr_setsigdefault 53.Nd get and set spawn-sigdefault attribute of spawn attributes object 54.Sh LIBRARY 55.Lb libc 56.Sh SYNOPSIS 57.In signal.h 58.In spawn.h 59.Ft int 60.Fo posix_spawnattr_getsigdefault 61.Fa "const posix_spawnattr_t *restrict attr" 62.Fa "sigset_t *restrict sigdefault" 63.Fc 64.Ft int 65.Fo posix_spawnattr_setsigdefault 66.Fa "posix_spawnattr_t *restrict attr" 67.Fa "const sigset_t *restrict sigdefault" 68.Fc 69.Sh DESCRIPTION 70The 71.Fn posix_spawnattr_getsigdefault 72function obtains the value of the spawn-sigdefault attribute from the 73attributes object referenced by 74.Fa attr . 75.Pp 76The 77.Fn posix_spawnattr_setsigdefault 78function sets the spawn-sigdefault attribute in an initialized attributes 79object referenced by 80.Fa attr . 81.Pp 82The spawn-sigdefault attribute represents the set of signals to be forced to 83default signal handling in the new process image 84.Po 85if 86.Dv POSIX_SPAWN_SETSIGDEF 87is set in the spawn-flags attribute 88.Pc 89by a spawn operation. 90The default value of this attribute is an empty signal set. 91.Sh RETURN VALUES 92Upon successful completion, 93.Fn posix_spawnattr_getsigdefault 94returns 0 and stores the value of the spawn-sigdefault attribute of 95.Fa attr 96into the object referenced by the 97.Fa sigdefault 98parameter. 99Otherwise, an error number is returned to indicate the error. 100.Pp 101Upon successful completion, 102.Fn posix_spawnattr_setsigdefault 103returns 0. 104Otherwise, an error number is returned to indicate the error. 105.Sh ERRORS 106These functions may fail if: 107.Bl -tag -width Er 108.It Er EINVAL 109The value specified by 110.Fa attr 111is invalid. 112.El 113.Pp 114The 115.Fn posix_spawnattr_setsigdefault 116function may fail if: 117.Bl -tag -width Er 118.It Er EINVAL 119The value of the attribute being set is not valid. 120.El 121.Sh INTERFACE STABILITY 122.Sy Standard 123.Sh MT-LEVEL 124.Sy MT-Safe 125.Sh SEE ALSO 126.Xr posix_spawn 3C , 127.Xr posix_spawnattr_destroy 3C , 128.Xr posix_spawnattr_getflags 3C , 129.Xr posix_spawnattr_getpgroup 3C , 130.Xr posix_spawnattr_getschedparam 3C , 131.Xr posix_spawnattr_getschedpolicy 3C , 132.Xr posix_spawnattr_getsigmask 3C , 133.Xr attributes 7 , 134.Xr standards 7 135.Sh STANDARDS 136The 137.Fn posix_spawnattr_getsigdefault 138and 139.Fn posix_spawnattr_setsigdefault 140functions conform to 141.St -p1003.1-2001 . 142