musl/src/signal/psignal.c

#include <stdio.h>
#include <string.h>
#include <signal.h>

void psignal(int sig, const char *msg)
{
	char *s = strsignal(sig);
	if (msg) fprintf(stderr, "%s: %s\n", msg, s);
	else fprintf(stderr, "%s\n", s);
}