1.\" $NetBSD: psignal.3,v 1.13 2002/10/01 16:48:35 wiz 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 8.2 (Berkeley) 2/27/95 35.\" 36.Dd February 27, 1995 37.Dt PSIGNAL 3 38.Os 39.Sh NAME 40.Nm psignal , 41.Nm sys_siglist , 42.Nm sys_signame 43.Nd system signal messages 44.Sh LIBRARY 45.Lb libc 46.Sh SYNOPSIS 47.Fd #include \*[Lt]signal.h\*[Gt] 48.Ft void 49.Fn psignal "unsigned sig" "const char *s" 50.Vt extern const char * const sys_siglist[]; 51.Vt extern const char * const sys_signame[]; 52.Sh DESCRIPTION 53The 54.Fn psignal 55function locates the descriptive message 56string for the given signal number 57.Fa sig 58and writes it to the standard error. 59.Pp 60If the argument 61.Fa s 62is 63.Pf non- Dv NULL 64it is written to the standard error file descriptor 65prior to the message string, 66immediately followed by a colon and a space. 67If the signal number is not recognized 68.Pq Xr sigaction 2 , 69the string 70.Dq "Unknown signal 71is produced. 72.Pp 73The message strings can be accessed directly using the external array 74.Va sys_siglist , 75indexed by recognized signal numbers. 76The external array 77.Va sys_signame 78is used similarly and contains short, upper-case abbreviations for signals 79which are useful for recognizing signal names in user input. 80The defined variable 81.Dv NSIG 82contains a count of the strings in 83.Va sys_siglist 84and 85.Va sys_signame . 86.Sh SEE ALSO 87.Xr sigaction 2 , 88.Xr perror 3 , 89.Xr setlocale 3 , 90.Xr strsignal 3 91.Sh HISTORY 92The 93.Fn psignal 94function appeared in 95.Bx 4.2 . 96