1.\" $NetBSD: psignal.3,v 1.5 1995/02/27 04:35:39 cgd Exp $ 2.\" 3.\" Copyright (c) 1983, 1991, 1993 4.\" The Regents of the University of California. 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. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed by the University of 17.\" California, Berkeley and its contributors. 18.\" 4. Neither the name of the University nor the names of its contributors 19.\" may be used to endorse or promote products derived from this software 20.\" without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.\" @(#)psignal.3 8.1 (Berkeley) 6/4/93 35.\" 36.Dd June 4, 1993 37.Dt PSIGNAL 3 38.Os BSD 4.2 39.Sh NAME 40.Nm psignal , 41.Nm sys_siglist , 42.Nm sys_signame 43.Nd system signal messages 44.Sh SYNOPSIS 45.Fd #include <sys/signal.h> 46.Ft void 47.Fn psignal "unsigned sig" "const char *s" 48.Vt extern char *sys_siglist[]; 49.Vt extern char *sys_signame[]; 50.Sh DESCRIPTION 51The 52.Fn psignal 53function locates the descriptive message 54string for the given signal number 55.Fa sig 56and writes it to the standard error. 57.Pp 58If the argument 59.Fa s 60is 61.Pf non- Dv NULL 62it is written to the standard error file descriptor 63prior to the message string, 64immediately followed by a colon and a space. 65If the signal number is not recognized 66.Pq Xr sigaction 2 , 67the string 68.Dq "Unknown signal 69is produced. 70.Pp 71The message strings can be accessed directly using the external array 72.Va sys_siglist , 73indexed by recognized signal numbers. The external array 74.Va sys_signame 75is used similarly and contains short, upper-case abbreviations for signals 76which are useful for recognizing signal names in user input. The defined 77variable 78.Dv NSIG 79contains a count of the strings in 80.Va sys_siglist 81and 82.Va sys_signame . 83.Sh SEE ALSO 84.Xr sigaction 2 , 85.Xr perror 3 86.Sh HISTORY 87The 88.Fn psignal 89function appeared in 90.Bx 4.2 . 91