NAME
psignal,
sys_siglist, sys_signame
— system signal
messages
SYNOPSIS
#include
<signal.h>
void
psignal(unsigned
int sig, const char
*s);
extern char *sys_siglist[];
extern char *sys_signame[];
DESCRIPTION
The
psignal()
function locates the descriptive message string for the given signal number
sig and writes it to the standard error.
If the argument s is not
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 (see
sigaction(2) for a list), the string “Unknown signal”
is produced.
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 value
NSIG contains a count of the strings in
sys_siglist and sys_signame.
SEE ALSO
HISTORY
The psignal() function appeared in
4.2BSD.