Function snprintf0

util/str0.c:44–65

 */

int snprintf0(char *buf, size_t bufsize, const char *fmt, ...)
{
    int rc;
    va_list ap;

    if (buf == NULL || bufsize == 0) {
        logmsg(LOGMSG_ERROR, "snprintf0(%d): ERROR: bad buffer @%p(%zu)\n",
                (int)getpid(), buf, bufsize);
        return -1;
    }

    if (fmt == NULL) {
        logmsg(LOGMSG_ERROR, "snprintf0(%d): ERROR: NULL format\n", (int)getpid());
        return -1;
    }

    va_start(ap, fmt);
    rc = vsnprintf(buf, bufsize, fmt, ap);
    va_end(ap);
    buf[bufsize - 1] = '\0';
    return rc;
}

/** Safe version of strcpy(), more reliable than strncpy().
 *