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92 lines
3.1 KiB
Groff
92 lines
3.1 KiB
Groff
.\" Copyright (c) 1983, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)psignal.3 8.1 (Berkeley) 6/4/93
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.\"
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.TH PSIGNAL 3 "27 July 1997" GNO "Library Routines"
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.SH NAME
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.BR psignal ,
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.BR sys_siglist ,
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.BR sys_signame
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\- system signal messages
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.SH SYNOPSIS
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#include <sys/signal.h>
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.sp 1
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void
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\fBpsignal\fR (unsigned \fIsig\fR, const char *\fIs\fR);
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.sp 1
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extern const char * const \fBsys_siglist\fR[];
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.br
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extern const char * const \fBsys_signame\fR[];
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.SH DESCRIPTION
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The
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.BR psignal
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function locates the descriptive message
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string for the given signal number
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.I sig
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and writes it to the standard error.
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.LP
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If the argument
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.I s
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is non-NULL,
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it is written to the standard error file descriptor
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prior to the message string,
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immediately followed by a colon and a space.
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If the signal number is not recognized (see
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.BR sigaction (2)),
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the string
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.I "Unknown signal"
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is produced.
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.LP
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The message strings can be accessed directly
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through the external array
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.IR sys_siglist ,
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indexed by recognized signal numbers.
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The external array
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.IR sys_signame
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is used similarly and
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contains short, lower-case abbreviations for signals
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which are useful for recognizing signal names
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in user input.
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The defined macro
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.BR NSIG
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contains a count of the strings in
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.IR sys_siglist
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and
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.IR sys_signame .
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.SH SEE ALSO
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.BR sigaction (2),
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.BR perror (3)
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.SH HISTORY
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The
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.BR psignal
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function appeared in 4.2BSD.
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