1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /*
28 * Logging support for the LDoms Agent daemon
29 */
30
31 #include <errno.h>
32 #include <stdarg.h>
33 #include <stdio.h>
34 #include <string.h>
35 #include <syslog.h>
36 #include <sys/types.h>
37
38 #define LDMA_MAX_MSG_LEN 512
39 #define LDMA_MAX_TIME_LEN 32
40
41 extern boolean_t ldma_debug;
42 extern boolean_t ldma_daemon;
43
44 static char *log_prio_str[] = {
45 "EMERG", /* LOG_EMERG */
46 "ALERT", /* LOG_ALERT */
47 "CRIT", /* LOG_CRIT */
48 "ERROR", /* LOG_ERR */
49 "WARNING", /* LOG_WARNING */
50 "NOTICE", /* LOG_NOTICE */
51 "INFO", /* LOG_INFO */
52 "DEBUG" /* LOG_DEBUG */
53 };
54
55 /*
56 * Generate a timestamp string in the provided buffer.
57 * If any errors are encountered, the function returns
58 * with the buffer containing an empty string.
59 */
60 static void
ldma_timestamp(char * buf,size_t buflen)61 ldma_timestamp(char *buf, size_t buflen)
62 {
63 struct tm ltime;
64 struct timeval now;
65
66 if ((buf == NULL) || (buflen == 0))
67 return;
68
69 buf[0] = '\0';
70
71 if (gettimeofday(&now, NULL) != 0) {
72 (void) fprintf(stderr, "gettimeofday failed: %s\n",
73 strerror(errno));
74 return;
75 }
76
77 if (localtime_r(&now.tv_sec, <ime) == NULL) {
78 (void) fprintf(stderr, "localtime_r failed: %s\n",
79 strerror(errno));
80 return;
81 }
82
83 if (strftime(buf, buflen, "%b %e %T ", <ime) == 0) {
84 (void) fprintf(stderr, "strftime failed: buffer[%d] too "
85 "small\n", buflen);
86 /*
87 * On failure, the contents of the buffer
88 * are indeterminate. Restore it to a known
89 * state before returning.
90 */
91 buf[0] = '\0';
92 }
93 }
94
95 static void
ldma_log_msg(int prio,char * module,char * fmt,va_list vap)96 ldma_log_msg(int prio, char *module, char *fmt, va_list vap)
97 {
98 char msgbuf[LDMA_MAX_MSG_LEN];
99 char timebuf[LDMA_MAX_TIME_LEN] = "";
100
101 /* generate a timestamp for the SMF log */
102 ldma_timestamp(timebuf, sizeof (timebuf));
103
104 /* LINTED E_SEC_PRINTF_VAR_FMT */
105 (void) vsnprintf(msgbuf, LDMA_MAX_MSG_LEN, fmt, vap);
106
107 /*
108 * Print the message to stderr. In daemon mode, it
109 * will be sent to the SMF log. In standalone mode,
110 * it will be sent to the controlling terminal.
111 */
112 (void) fprintf(stderr, "%s%s.%s: %s\n", timebuf, module,
113 log_prio_str[prio], msgbuf);
114
115 if (ldma_daemon && prio != LOG_DEBUG) {
116 /* LINTED E_SEC_PRINTF_VAR_FMT */
117 syslog(prio, msgbuf);
118 }
119 }
120
121 void
ldma_err(char * module,char * fmt,...)122 ldma_err(char *module, char *fmt, ...)
123 {
124 va_list vap;
125
126 va_start(vap, fmt);
127 ldma_log_msg(LOG_ERR, module, fmt, vap);
128 va_end(vap);
129 }
130
131 void
ldma_info(char * module,char * fmt,...)132 ldma_info(char *module, char *fmt, ...)
133 {
134 va_list vap;
135
136 va_start(vap, fmt);
137 ldma_log_msg(LOG_INFO, module, fmt, vap);
138 va_end(vap);
139 }
140
141 void
ldma_dbg(char * module,char * fmt,...)142 ldma_dbg(char *module, char *fmt, ...)
143 {
144 va_list vap;
145
146 if (!ldma_debug) {
147 /* not debugging */
148 return;
149 }
150
151 va_start(vap, fmt);
152 ldma_log_msg(LOG_DEBUG, module, fmt, vap);
153 va_end(vap);
154 }
155