dhclient: New files

freebsd-userspace/commands/sbin/dhclient/errwarn.c

@@ -0,0 +1,237 @@
+/*	$OpenBSD: errwarn.c,v 1.7 2004/05/04 22:23:01 mickey Exp $	*/
+
+/* Errors and warnings... */
+
+/*
+ * Copyright (c) 1996 The Internet Software Consortium.
+ * All Rights Reserved.
+ * Copyright (c) 1995 RadioMail Corporation.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of RadioMail Corporation, the Internet Software
+ *    Consortium nor the names of its contributors may be used to endorse
+ *    or promote products derived from this software without specific
+ *    prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY RADIOMAIL CORPORATION, THE INTERNET
+ * SOFTWARE CONSORTIUM AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL RADIOMAIL CORPORATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software was written for RadioMail Corporation by Ted Lemon
+ * under a contract with Vixie Enterprises.   Further modifications have
+ * been made for the Internet Software Consortium under a contract
+ * with Vixie Laboratories.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <errno.h>
+
+#include "dhcpd.h"
+
+static void do_percentm(char *obuf, size_t size, char *ibuf);
+
+static char mbuf[1024];
+static char fbuf[1024];
+
+int warnings_occurred;
+
+/*
+ * Log an error message, then exit.
+ */
+void
+error(char *fmt, ...)
+{
+	va_list list;
+
+	do_percentm(fbuf, sizeof(fbuf), fmt);
+
+	va_start(list, fmt);
+	vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
+	va_end(list);
+
+#ifndef DEBUG
+	syslog(log_priority | LOG_ERR, "%s", mbuf);
+#endif
+
+	/* Also log it to stderr? */
+	if (log_perror) {
+		write(2, mbuf, strlen(mbuf));
+		write(2, "\n", 1);
+	}
+
+	syslog(LOG_CRIT, "exiting.");
+	if (log_perror) {
+		fprintf(stderr, "exiting.\n");
+		fflush(stderr);
+	}
+	exit(1);
+}
+
+/*
+ * Log a warning message...
+ */
+int
+warning(char *fmt, ...)
+{
+	va_list list;
+
+	do_percentm(fbuf, sizeof(fbuf), fmt);
+
+	va_start(list, fmt);
+	vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
+	va_end(list);
+
+#ifndef DEBUG
+	syslog(log_priority | LOG_ERR, "%s", mbuf);
+#endif
+
+	if (log_perror) {
+		write(2, mbuf, strlen(mbuf));
+		write(2, "\n", 1);
+	}
+
+	return (0);
+}
+
+/*
+ * Log a note...
+ */
+int
+note(char *fmt, ...)
+{
+	va_list list;
+
+	do_percentm(fbuf, sizeof(fbuf), fmt);
+
+	va_start(list, fmt);
+	vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
+	va_end(list);
+
+#ifndef DEBUG
+	syslog(log_priority | LOG_INFO, "%s", mbuf);
+#endif
+
+	if (log_perror) {
+		write(2, mbuf, strlen(mbuf));
+		write(2, "\n", 1);
+	}
+
+	return (0);
+}
+
+/*
+ * Log a debug message...
+ */
+int
+debug(char *fmt, ...)
+{
+	va_list list;
+
+	do_percentm(fbuf, sizeof(fbuf), fmt);
+
+	va_start(list, fmt);
+	vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
+	va_end(list);
+
+#ifndef DEBUG
+	syslog(log_priority | LOG_DEBUG, "%s", mbuf);
+#endif
+
+	if (log_perror) {
+		write(2, mbuf, strlen(mbuf));
+		write(2, "\n", 1);
+	}
+
+	return (0);
+}
+
+/*
+ * Find %m in the input string and substitute an error message string.
+ */
+static void
+do_percentm(char *obuf, size_t size, char *ibuf)
+{
+	char ch;
+	char *s = ibuf;
+	char *t = obuf;
+	size_t prlen;
+	size_t fmt_left;
+	int saved_errno = errno;
+
+	/*
+	 * We wouldn't need this mess if printf handled %m, or if
+	 * strerror() had been invented before syslog().
+	 */
+	for (fmt_left = size; (ch = *s); ++s) {
+		if (ch == '%' && s[1] == 'm') {
+			++s;
+			prlen = snprintf(t, fmt_left, "%s",
+			    strerror(saved_errno));
+			if (prlen >= fmt_left)
+				prlen = fmt_left - 1;
+			t += prlen;
+			fmt_left -= prlen;
+		} else {
+			if (fmt_left > 1) {
+				*t++ = ch;
+				fmt_left--;
+			}
+		}
+	}
+	*t = '\0';
+}
+
+int
+parse_warn(char *fmt, ...)
+{
+	va_list list;
+	static char spaces[] =
+	    "                                        "
+	    "                                        "; /* 80 spaces */
+
+	do_percentm(mbuf, sizeof(mbuf), fmt);
+	snprintf(fbuf, sizeof(fbuf), "%s line %d: %s", tlname, lexline, mbuf);
+	va_start(list, fmt);
+	vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
+	va_end(list);
+
+#ifndef DEBUG
+	syslog(log_priority | LOG_ERR, "%s", mbuf);
+	syslog(log_priority | LOG_ERR, "%s", token_line);
+	if (lexline < 81)
+		syslog(log_priority | LOG_ERR,
+		    "%s^", &spaces[sizeof(spaces) - lexchar]);
+#endif
+
+	if (log_perror) {
+		write(2, mbuf, strlen(mbuf));
+		write(2, "\n", 1);
+		write(2, token_line, strlen(token_line));
+		write(2, "\n", 1);
+		write(2, spaces, lexchar - 1);
+		write(2, "^\n", 2);
+	}
+
+	warnings_occurred = 1;
+
+	return (0);
+}