1.\" 2.\" This file and its contents are supplied under the terms of the 3.\" Common Development and Distribution License ("CDDL"), version 1.0. 4.\" You may only use this file in accordance with the terms of version 5.\" 1.0 of the CDDL. 6.\" 7.\" A full copy of the text of the CDDL should have accompanied this 8.\" source. A copy of the CDDL is also available via the Internet at 9.\" http://www.illumos.org/license/CDDL. 10.\" 11.\" 12.\" Copyright 2015 Joyent, Inc. 13.\" 14.Dd May 16, 2020 15.Dt PCLEARSIG 3PROC 16.Os 17.Sh NAME 18.Nm Pclearsig , 19.Nm Lclearsig 20.Nd clear process signals 21.Sh LIBRARY 22.Lb libproc 23.Sh SYNOPSIS 24.In libproc.h 25.Ft int 26.Fo Pclearsig 27.Fa "struct ps_prochandle *P" 28.Fc 29.Ft int 30.Fo Lclearsig 31.Fa "struct ps_lwphandle *L" 32.Fc 33.Sh DESCRIPTION 34During normal operation a process may receive a signal. 35Signals may indicate an error, for example referencing unmapped memory, an alarm 36firing, requests for information, and users requesting an interruption. 37For more information on the generation and usage of signals, see 38.Xr signal.h 3HEAD . 39.Pp 40The 41.Fn Pclearsig 42function instructs the system to clear any signal pending delivery to 43a thread in the process represented by the process handle 44.Fa P . 45The pending signal will never be delivered to process represented by 46.Fa P . 47.Pp 48The 49.Fn Lclearsig 50function is identical to the 51.Fn Pclearsig 52function, except rather than operating on the process and its 53representative thread, it instead operates on the thread handle 54.Fa L . 55.Pp 56The 57.Fn Pclearsig 58function only has meaning for active processes. 59It will fail on process handles corresponding to core files, zombie processes 60and ELF objects. 61.Sh RETURN VALUES 62Upon successful completion, the 63.Fn Pclearsig 64function clears pending faults and 65returns 66.Sy 0 . 67Otherwise, 68.Sy -1 69is returned, 70.Sy errno 71is set to indicate the error, 72and no faults are cleared. 73.Sh ERRORS 74For a full list of possible errors see the 75.Sy DIAGNOSTICS 76section in 77.Xr proc 4 . 78.Sh INTERFACE STABILITY 79.Sy Uncommitted 80.Sh MT-LEVEL 81See 82.Sy LOCKING 83in 84.Xr libproc 3LIB . 85.Sh SEE ALSO 86.Xr signal.h 3HEAD , 87.Xr libproc 3LIB , 88.Xr proc 4 89