NAME
psignal, psiginfo,
sys_siglist, sys_signame
— system signal
messages
LIBRARY
library “libc”
SYNOPSIS
#include
<signal.h>
void
psignal(int
sig, const char
*s);
psiginfo(const
siginfo_t *si, const char
*s);
extern const char * const sys_siglist[];
extern const char * const sys_signame[];
DESCRIPTION
Thepsignal()
function locates the descriptive message string for the given signal number
sig and writes it to the standard error.
If the argument s is
non-NULL it 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
(sigaction(2)), the string “Unknown signal” is
produced.
The
psiginfo()
function produces the same output as the psignal()
function, only it uses the signal number information from the
si argument.
The message strings can be accessed directly using the external
array sys_siglist, indexed by recognized signal
numbers. The external array 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
NSIG contains a count of the strings in
sys_siglist and sys_signame.
SEE ALSO
HISTORY
The psignal() function appeared in
4.2BSD. The psiginfo()
function appeared in NetBSD 6.0.