PSIGNAL(3)
NAME
psignal, sys_siglist − system signal messages
USAGE
psignal(sig, s)
unsigned sig;
char *s;
char *sys_siglist[];
DESCRIPTION
Psignal produces a short message on the standard error file describing the indicated signal. First, the argument string s is printed, then a colon, then the name of the signal and a newline. The argument string is usually given the name of the program that incurred the signal. The signal number should be from among those found in <signal.h>.
To simplify variant formatting of signal names, the vector of message strings sys_siglist is provided; the signal number can be used as an index in this table to get the signal name without the newline. The “define NSIG” defined in <signal.h> is the number of messages provided for in the table; it should be checked, because new signals may be added to the system before they are added to the table.