1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2012 The FreeBSD Foundation
5 * All rights reserved.
6 *
7 * This software was developed by Edward Tomasz Napierala under sponsorship
8 * from the FreeBSD Foundation.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
35
36 #include <errno.h>
37 #include <stdarg.h>
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <string.h>
41 #include <syslog.h>
42 #include <vis.h>
43
44 #include "iscsid.h"
45
46 static int log_level = 0;
47 static char *peer_name = NULL;
48 static char *peer_addr = NULL;
49
50 #define MSGBUF_LEN 1024
51
52 void
log_init(int level)53 log_init(int level)
54 {
55
56 log_level = level;
57 openlog(getprogname(), LOG_NDELAY | LOG_PID, LOG_DAEMON);
58 }
59
60 void
log_set_peer_name(const char * name)61 log_set_peer_name(const char *name)
62 {
63
64 /*
65 * XXX: Turn it into assertion?
66 */
67 if (peer_name != NULL)
68 log_errx(1, "%s called twice", __func__);
69 if (peer_addr == NULL)
70 log_errx(1, "%s called before log_set_peer_addr", __func__);
71
72 peer_name = checked_strdup(name);
73 }
74
75 void
log_set_peer_addr(const char * addr)76 log_set_peer_addr(const char *addr)
77 {
78
79 /*
80 * XXX: Turn it into assertion?
81 */
82 if (peer_addr != NULL)
83 log_errx(1, "%s called twice", __func__);
84
85 peer_addr = checked_strdup(addr);
86 }
87
88 static void
log_common(int priority,int log_errno,const char * fmt,va_list ap)89 log_common(int priority, int log_errno, const char *fmt, va_list ap)
90 {
91 static char msgbuf[MSGBUF_LEN];
92 static char msgbuf_strvised[MSGBUF_LEN * 4 + 1];
93 char *errstr;
94 int ret;
95
96 ret = vsnprintf(msgbuf, sizeof(msgbuf), fmt, ap);
97 if (ret < 0) {
98 fprintf(stderr, "%s: snprintf failed", getprogname());
99 syslog(LOG_CRIT, "snprintf failed");
100 exit(1);
101 }
102
103 ret = strnvis(msgbuf_strvised, sizeof(msgbuf_strvised), msgbuf, VIS_NL);
104 if (ret < 0) {
105 fprintf(stderr, "%s: strnvis failed", getprogname());
106 syslog(LOG_CRIT, "strnvis failed");
107 exit(1);
108 }
109
110 if (log_errno == -1) {
111 if (peer_name != NULL) {
112 fprintf(stderr, "%s: %s (%s): %s\n", getprogname(),
113 peer_addr, peer_name, msgbuf_strvised);
114 syslog(priority, "%s (%s): %s",
115 peer_addr, peer_name, msgbuf_strvised);
116 } else if (peer_addr != NULL) {
117 fprintf(stderr, "%s: %s: %s\n", getprogname(),
118 peer_addr, msgbuf_strvised);
119 syslog(priority, "%s: %s",
120 peer_addr, msgbuf_strvised);
121 } else {
122 fprintf(stderr, "%s: %s\n", getprogname(), msgbuf_strvised);
123 syslog(priority, "%s", msgbuf_strvised);
124 }
125
126 } else {
127 errstr = strerror(log_errno);
128
129 if (peer_name != NULL) {
130 fprintf(stderr, "%s: %s (%s): %s: %s\n", getprogname(),
131 peer_addr, peer_name, msgbuf_strvised, errstr);
132 syslog(priority, "%s (%s): %s: %s",
133 peer_addr, peer_name, msgbuf_strvised, errstr);
134 } else if (peer_addr != NULL) {
135 fprintf(stderr, "%s: %s: %s: %s\n", getprogname(),
136 peer_addr, msgbuf_strvised, errstr);
137 syslog(priority, "%s: %s: %s",
138 peer_addr, msgbuf_strvised, errstr);
139 } else {
140 fprintf(stderr, "%s: %s: %s\n", getprogname(),
141 msgbuf_strvised, errstr);
142 syslog(priority, "%s: %s",
143 msgbuf_strvised, errstr);
144 }
145 }
146 }
147
148 void
log_err(int eval,const char * fmt,...)149 log_err(int eval, const char *fmt, ...)
150 {
151 va_list ap;
152
153 va_start(ap, fmt);
154 log_common(LOG_CRIT, errno, fmt, ap);
155 va_end(ap);
156
157 exit(eval);
158 }
159
160 void
log_errx(int eval,const char * fmt,...)161 log_errx(int eval, const char *fmt, ...)
162 {
163 va_list ap;
164
165 va_start(ap, fmt);
166 log_common(LOG_CRIT, -1, fmt, ap);
167 va_end(ap);
168
169 exit(eval);
170 }
171
172 void
log_warn(const char * fmt,...)173 log_warn(const char *fmt, ...)
174 {
175 va_list ap;
176
177 va_start(ap, fmt);
178 log_common(LOG_WARNING, errno, fmt, ap);
179 va_end(ap);
180 }
181
182 void
log_warnx(const char * fmt,...)183 log_warnx(const char *fmt, ...)
184 {
185 va_list ap;
186
187 va_start(ap, fmt);
188 log_common(LOG_WARNING, -1, fmt, ap);
189 va_end(ap);
190 }
191
192 void
log_debugx(const char * fmt,...)193 log_debugx(const char *fmt, ...)
194 {
195 va_list ap;
196
197 if (log_level == 0)
198 return;
199
200 va_start(ap, fmt);
201 log_common(LOG_DEBUG, -1, fmt, ap);
202 va_end(ap);
203 }
204