1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2012 The FreeBSD Foundation
5 *
6 * This software was developed by Edward Tomasz Napierala under sponsorship
7 * from the FreeBSD Foundation.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 */
31
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
34
35 #include <errno.h>
36 #include <stdarg.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <string.h>
40 #include <syslog.h>
41 #include <vis.h>
42
43 #include "iscsid.h"
44
45 static int log_level = 0;
46 static char *peer_name = NULL;
47 static char *peer_addr = NULL;
48
49 #define MSGBUF_LEN 1024
50
51 void
log_init(int level)52 log_init(int level)
53 {
54
55 log_level = level;
56 openlog(getprogname(), LOG_NDELAY | LOG_PID, LOG_DAEMON);
57 }
58
59 void
log_set_peer_name(const char * name)60 log_set_peer_name(const char *name)
61 {
62
63 /*
64 * XXX: Turn it into assertion?
65 */
66 if (peer_name != NULL)
67 log_errx(1, "%s called twice", __func__);
68 if (peer_addr == NULL)
69 log_errx(1, "%s called before log_set_peer_addr", __func__);
70
71 peer_name = checked_strdup(name);
72 }
73
74 void
log_set_peer_addr(const char * addr)75 log_set_peer_addr(const char *addr)
76 {
77
78 /*
79 * XXX: Turn it into assertion?
80 */
81 if (peer_addr != NULL)
82 log_errx(1, "%s called twice", __func__);
83
84 peer_addr = checked_strdup(addr);
85 }
86
87 static void
log_common(int priority,int log_errno,const char * fmt,va_list ap)88 log_common(int priority, int log_errno, const char *fmt, va_list ap)
89 {
90 static char msgbuf[MSGBUF_LEN];
91 static char msgbuf_strvised[MSGBUF_LEN * 4 + 1];
92 char *errstr;
93 int ret;
94
95 ret = vsnprintf(msgbuf, sizeof(msgbuf), fmt, ap);
96 if (ret < 0) {
97 fprintf(stderr, "%s: snprintf failed", getprogname());
98 syslog(LOG_CRIT, "snprintf failed");
99 exit(1);
100 }
101
102 ret = strnvis(msgbuf_strvised, sizeof(msgbuf_strvised), msgbuf, VIS_NL);
103 if (ret < 0) {
104 fprintf(stderr, "%s: strnvis failed", getprogname());
105 syslog(LOG_CRIT, "strnvis failed");
106 exit(1);
107 }
108
109 if (log_errno == -1) {
110 if (peer_name != NULL) {
111 fprintf(stderr, "%s: %s (%s): %s\n", getprogname(),
112 peer_addr, peer_name, msgbuf_strvised);
113 syslog(priority, "%s (%s): %s",
114 peer_addr, peer_name, msgbuf_strvised);
115 } else if (peer_addr != NULL) {
116 fprintf(stderr, "%s: %s: %s\n", getprogname(),
117 peer_addr, msgbuf_strvised);
118 syslog(priority, "%s: %s",
119 peer_addr, msgbuf_strvised);
120 } else {
121 fprintf(stderr, "%s: %s\n", getprogname(), msgbuf_strvised);
122 syslog(priority, "%s", msgbuf_strvised);
123 }
124
125 } else {
126 errstr = strerror(log_errno);
127
128 if (peer_name != NULL) {
129 fprintf(stderr, "%s: %s (%s): %s: %s\n", getprogname(),
130 peer_addr, peer_name, msgbuf_strvised, errstr);
131 syslog(priority, "%s (%s): %s: %s",
132 peer_addr, peer_name, msgbuf_strvised, errstr);
133 } else if (peer_addr != NULL) {
134 fprintf(stderr, "%s: %s: %s: %s\n", getprogname(),
135 peer_addr, msgbuf_strvised, errstr);
136 syslog(priority, "%s: %s: %s",
137 peer_addr, msgbuf_strvised, errstr);
138 } else {
139 fprintf(stderr, "%s: %s: %s\n", getprogname(),
140 msgbuf_strvised, errstr);
141 syslog(priority, "%s: %s",
142 msgbuf_strvised, errstr);
143 }
144 }
145 }
146
147 void
log_err(int eval,const char * fmt,...)148 log_err(int eval, const char *fmt, ...)
149 {
150 va_list ap;
151
152 va_start(ap, fmt);
153 log_common(LOG_CRIT, errno, fmt, ap);
154 va_end(ap);
155
156 exit(eval);
157 }
158
159 void
log_errx(int eval,const char * fmt,...)160 log_errx(int eval, const char *fmt, ...)
161 {
162 va_list ap;
163
164 va_start(ap, fmt);
165 log_common(LOG_CRIT, -1, fmt, ap);
166 va_end(ap);
167
168 exit(eval);
169 }
170
171 void
log_warn(const char * fmt,...)172 log_warn(const char *fmt, ...)
173 {
174 va_list ap;
175
176 va_start(ap, fmt);
177 log_common(LOG_WARNING, errno, fmt, ap);
178 va_end(ap);
179 }
180
181 void
log_warnx(const char * fmt,...)182 log_warnx(const char *fmt, ...)
183 {
184 va_list ap;
185
186 va_start(ap, fmt);
187 log_common(LOG_WARNING, -1, fmt, ap);
188 va_end(ap);
189 }
190
191 void
log_debugx(const char * fmt,...)192 log_debugx(const char *fmt, ...)
193 {
194 va_list ap;
195
196 if (log_level == 0)
197 return;
198
199 va_start(ap, fmt);
200 log_common(LOG_DEBUG, -1, fmt, ap);
201 va_end(ap);
202 }
203