114 lines
3.4 KiB
Groff
114 lines
3.4 KiB
Groff
.\" Copyright (c) 1983, 1991, 1993
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by the University of
|
|
.\" California, Berkeley and its contributors.
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" @(#)psignal.3 8.2 (Berkeley) 2/27/95
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd February 27, 1995
|
|
.Dt PSIGNAL 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm psignal ,
|
|
.Nm strsignal ,
|
|
.Nm sys_siglist ,
|
|
.Nm sys_signame
|
|
.Nd system signal messages
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In signal.h
|
|
.Ft void
|
|
.Fn psignal "unsigned sig" "const char *s"
|
|
.Vt extern const char * const sys_siglist[] ;
|
|
.Vt extern const char * const sys_signame[] ;
|
|
.In string.h
|
|
.Ft "char *"
|
|
.Fn strsignal "int sig"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn psignal
|
|
and
|
|
.Fn strsignal
|
|
functions locate the descriptive message
|
|
string for a signal number.
|
|
.Pp
|
|
The
|
|
.Fn strsignal
|
|
function accepts a signal number argument
|
|
.Fa sig
|
|
and returns a pointer to the corresponding message string.
|
|
.Pp
|
|
The
|
|
.Fn psignal
|
|
function accepts a signal number argument
|
|
.Fa sig
|
|
and writes it to the standard error.
|
|
If the argument
|
|
.Fa s
|
|
is
|
|
.Pf non- Dv NULL
|
|
and does not point to the null character,
|
|
.Fa s
|
|
is written to the standard error file descriptor
|
|
prior to the message string,
|
|
immediately followed by a colon and a space.
|
|
If the signal number is not recognized
|
|
.Pq Xr sigaction 2 ,
|
|
the string
|
|
.Dq "Unknown signal
|
|
is produced.
|
|
.Pp
|
|
The message strings can be accessed directly
|
|
through the external array
|
|
.Va sys_siglist ,
|
|
indexed by recognized signal numbers.
|
|
The external array
|
|
.Va sys_signame
|
|
is used similarly and
|
|
contains short, lower-case abbreviations for signals
|
|
which are useful for recognizing signal names
|
|
in user input.
|
|
The defined variable
|
|
.Dv NSIG
|
|
contains a count of the strings in
|
|
.Va sys_siglist
|
|
and
|
|
.Va sys_signame .
|
|
.Sh SEE ALSO
|
|
.Xr sigaction 2 ,
|
|
.Xr perror 3 ,
|
|
.Xr strerror 3
|
|
.Sh HISTORY
|
|
The
|
|
.Fn psignal
|
|
function appeared in
|
|
.Bx 4.2 .
|