1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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 #include <errno.h>
32 #include <stdarg.h>
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <string.h>
36 #include <syslog.h>
37 #include <vis.h>
38
39 #include "libiscsiutil.h"
40
41 static int log_level = 0;
42 static char *peer_name = NULL;
43 static char *peer_addr = NULL;
44
45 #define MSGBUF_LEN 1024
46
47 void
log_init(int level)48 log_init(int level)
49 {
50
51 log_level = level;
52 openlog(getprogname(), LOG_NDELAY | LOG_PID, LOG_DAEMON);
53 }
54
55 void
log_set_peer_name(const char * name)56 log_set_peer_name(const char *name)
57 {
58
59 /*
60 * XXX: Turn it into assertion?
61 */
62 if (peer_name != NULL)
63 log_errx(1, "%s called twice", __func__);
64 if (peer_addr == NULL)
65 log_errx(1, "%s called before log_set_peer_addr", __func__);
66
67 peer_name = checked_strdup(name);
68 }
69
70 void
log_set_peer_addr(const char * addr)71 log_set_peer_addr(const char *addr)
72 {
73
74 /*
75 * XXX: Turn it into assertion?
76 */
77 if (peer_addr != NULL)
78 log_errx(1, "%s called twice", __func__);
79
80 peer_addr = checked_strdup(addr);
81 }
82
83 static void
log_common(int priority,int log_errno,const char * fmt,va_list ap)84 log_common(int priority, int log_errno, const char *fmt, va_list ap)
85 {
86 static char msgbuf[MSGBUF_LEN];
87 static char msgbuf_strvised[MSGBUF_LEN * 4 + 1];
88 char *errstr;
89 int ret;
90
91 ret = vsnprintf(msgbuf, sizeof(msgbuf), fmt, ap);
92 if (ret < 0) {
93 fprintf(stderr, "%s: snprintf failed", getprogname());
94 syslog(LOG_CRIT, "snprintf failed");
95 exit(1);
96 }
97
98 ret = strnvis(msgbuf_strvised, sizeof(msgbuf_strvised), msgbuf, VIS_NL);
99 if (ret < 0) {
100 fprintf(stderr, "%s: strnvis failed", getprogname());
101 syslog(LOG_CRIT, "strnvis failed");
102 exit(1);
103 }
104
105 if (log_errno == -1) {
106 if (peer_name != NULL) {
107 fprintf(stderr, "%s: %s (%s): %s\n", getprogname(),
108 peer_addr, peer_name, msgbuf_strvised);
109 syslog(priority, "%s (%s): %s",
110 peer_addr, peer_name, msgbuf_strvised);
111 } else if (peer_addr != NULL) {
112 fprintf(stderr, "%s: %s: %s\n", getprogname(),
113 peer_addr, msgbuf_strvised);
114 syslog(priority, "%s: %s",
115 peer_addr, msgbuf_strvised);
116 } else {
117 fprintf(stderr, "%s: %s\n", getprogname(), msgbuf_strvised);
118 syslog(priority, "%s", msgbuf_strvised);
119 }
120
121 } else {
122 errstr = strerror(log_errno);
123
124 if (peer_name != NULL) {
125 fprintf(stderr, "%s: %s (%s): %s: %s\n", getprogname(),
126 peer_addr, peer_name, msgbuf_strvised, errstr);
127 syslog(priority, "%s (%s): %s: %s",
128 peer_addr, peer_name, msgbuf_strvised, errstr);
129 } else if (peer_addr != NULL) {
130 fprintf(stderr, "%s: %s: %s: %s\n", getprogname(),
131 peer_addr, msgbuf_strvised, errstr);
132 syslog(priority, "%s: %s: %s",
133 peer_addr, msgbuf_strvised, errstr);
134 } else {
135 fprintf(stderr, "%s: %s: %s\n", getprogname(),
136 msgbuf_strvised, errstr);
137 syslog(priority, "%s: %s",
138 msgbuf_strvised, errstr);
139 }
140 }
141 }
142
143 void
log_err(int eval,const char * fmt,...)144 log_err(int eval, const char *fmt, ...)
145 {
146 va_list ap;
147
148 va_start(ap, fmt);
149 log_common(LOG_CRIT, errno, fmt, ap);
150 va_end(ap);
151
152 exit(eval);
153 }
154
155 void
log_errc(int eval,int code,const char * fmt,...)156 log_errc(int eval, int code, const char *fmt, ...)
157 {
158 va_list ap;
159
160 va_start(ap, fmt);
161 log_common(LOG_CRIT, code, fmt, ap);
162 va_end(ap);
163
164 exit(eval);
165 }
166
167 void
log_errx(int eval,const char * fmt,...)168 log_errx(int eval, const char *fmt, ...)
169 {
170 va_list ap;
171
172 va_start(ap, fmt);
173 log_common(LOG_CRIT, -1, fmt, ap);
174 va_end(ap);
175
176 exit(eval);
177 }
178
179 void
log_warn(const char * fmt,...)180 log_warn(const char *fmt, ...)
181 {
182 va_list ap;
183
184 va_start(ap, fmt);
185 log_common(LOG_WARNING, errno, fmt, ap);
186 va_end(ap);
187 }
188
189 void
log_warnc(int code,const char * fmt,...)190 log_warnc(int code, const char *fmt, ...)
191 {
192 va_list ap;
193
194 va_start(ap, fmt);
195 log_common(LOG_WARNING, code, fmt, ap);
196 va_end(ap);
197 }
198
199 void
log_warnx(const char * fmt,...)200 log_warnx(const char *fmt, ...)
201 {
202 va_list ap;
203
204 va_start(ap, fmt);
205 log_common(LOG_WARNING, -1, fmt, ap);
206 va_end(ap);
207 }
208
209 void
log_debugx(const char * fmt,...)210 log_debugx(const char *fmt, ...)
211 {
212 va_list ap;
213
214 if (log_level == 0)
215 return;
216
217 va_start(ap, fmt);
218 log_common(LOG_DEBUG, -1, fmt, ap);
219 va_end(ap);
220 }
221