Function rsyserr

log.c:453–479

This is like rprintf, but it also tries to print some * representation of the error code. Normally errcode = errno. * * Unlike rprintf, this always adds a newline and there should not be * one in the format string. * * Note that since strerror might involve dynamically loading a * message catalog we need to call it once before chroot-ing. */

 * Note that since strerror might involve dynamically loading a
 * message catalog we need to call it once before chroot-ing. */
void rsyserr(enum logcode code, int errcode, const char *format, ...)
{
	va_list ap;
	char buf[BIGPATHBUFLEN];
	size_t len;

	/* snprintf returns the would-have-been length on truncation, so
	 * each cumulative call must be guarded; if not, sizeof buf - len
	 * can underflow when promoted to size_t and the next call writes
	 * past the buffer. */
	len = snprintf(buf, sizeof buf, RSYNC_NAME ": [%s] ", who_am_i());

	if (len < sizeof buf) {
		va_start(ap, format);
		len += vsnprintf(buf + len, sizeof buf - len, format, ap);
		va_end(ap);
	}

	if (len < sizeof buf) {
		len += snprintf(buf + len, sizeof buf - len,
				": %s (%d)\n", strerror(errcode), errcode);
	}
	if (len >= sizeof buf)
		exit_cleanup(RERR_MESSAGEIO);

	rwrite(code, buf, len, 0);
}

void rflush(enum logcode code)
{