NetBSD/lib/libc/gen/psignal.3

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.\"     from: @(#)psignal.3	6.2 (Berkeley) 4/19/91
.\"	$Id: psignal.3,v 1.4 1993/09/08 18:43:20 jtc Exp $
.\"
.Dd April 19, 1991
.Dt PSIGNAL 3
.Os BSD 4.2
.Sh NAME
.Nm psignal ,
.Nm sys_siglist ,
.Nm sys_signame
.Nd system signal messages
.Sh SYNOPSIS
.Fd #include <sys/signal.h>
.Ft void
.Fn psignal "unsigned sig" "const char *s"
.Vt extern char *sys_siglist[];
.Vt extern char *sys_signame[];
.Sh DESCRIPTION
The
.Fn psignal
function locates the descriptive message
string for the given signal
.Fa sig
number
and writes it to the
.Em stderr .
.Pp
If the argument
.Fa s
is
.Pf non- Dv NULL
it is written to the
.Em stderr
prior to the message string.
The signal number should be from among those found in
.Aq Pa signal.h .
.Pp
The message strings can be accessed directly using the external array
.Va sys_siglist ,
indexed by recognized signal numbers.  The external array
.Va sys_signame
is used similarly and contains short, upper-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
.Sh HISTORY
The
.Fn psignal
function appeared in 
.Bx 4.2 .