strerror.c

/* public domain rewrite of strerror(3) */
 
#include "ruby/missing.h"
 
extern int sys_nerr;
extern char *sys_errlist[];
 
static char msg[50];
 
char *
strerror(int error)
{
    if (error <= sys_nerr && error > 0) {
        return sys_errlist[error];
    }
    snprintf(msg, sizeof(msg), "Unknown error (%d)", error);
    return msg;
}