1 014c66b6 2023-06-25 op /*	$OpenBSD: log.c,v 1.1 2018/07/10 16:39:54 florian Exp $	*/
  2 014c66b6 2023-06-25 op 
  3 014c66b6 2023-06-25 op /*
  4 014c66b6 2023-06-25 op  * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
  5 014c66b6 2023-06-25 op  *
  6 014c66b6 2023-06-25 op  * Permission to use, copy, modify, and distribute this software for any
  7 014c66b6 2023-06-25 op  * purpose with or without fee is hereby granted, provided that the above
  8 014c66b6 2023-06-25 op  * copyright notice and this permission notice appear in all copies.
  9 014c66b6 2023-06-25 op  *
 10 014c66b6 2023-06-25 op  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 11 014c66b6 2023-06-25 op  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 12 014c66b6 2023-06-25 op  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 13 014c66b6 2023-06-25 op  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 14 014c66b6 2023-06-25 op  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 15 014c66b6 2023-06-25 op  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 16 014c66b6 2023-06-25 op  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 17 014c66b6 2023-06-25 op  */
 18 014c66b6 2023-06-25 op 
 19 014c66b6 2023-06-25 op #include <stdio.h>
 20 014c66b6 2023-06-25 op #include <stdlib.h>
 21 014c66b6 2023-06-25 op #include <stdarg.h>
 22 014c66b6 2023-06-25 op #include <string.h>
 23 014c66b6 2023-06-25 op #include <syslog.h>
 24 014c66b6 2023-06-25 op #include <errno.h>
 25 014c66b6 2023-06-25 op #include <time.h>
 26 014c66b6 2023-06-25 op 
 27 014c66b6 2023-06-25 op #include "log.h"
 28 014c66b6 2023-06-25 op 
 29 014c66b6 2023-06-25 op static int		 debug;
 30 014c66b6 2023-06-25 op static int		 verbose;
 31 014c66b6 2023-06-25 op static const char	*log_procname;
 32 014c66b6 2023-06-25 op 
 33 014c66b6 2023-06-25 op void
 34 014c66b6 2023-06-25 op log_init(int n_debug, int facility)
 35 014c66b6 2023-06-25 op {
 36 014c66b6 2023-06-25 op 	debug = n_debug;
 37 014c66b6 2023-06-25 op 	verbose = n_debug;
 38 014c66b6 2023-06-25 op 	log_procinit(getprogname());
 39 014c66b6 2023-06-25 op 
 40 014c66b6 2023-06-25 op 	if (!debug)
 41 014c66b6 2023-06-25 op 		openlog(getprogname(), LOG_PID | LOG_NDELAY, facility);
 42 014c66b6 2023-06-25 op 
 43 014c66b6 2023-06-25 op 	tzset();
 44 014c66b6 2023-06-25 op }
 45 014c66b6 2023-06-25 op 
 46 014c66b6 2023-06-25 op void
 47 014c66b6 2023-06-25 op log_procinit(const char *procname)
 48 014c66b6 2023-06-25 op {
 49 014c66b6 2023-06-25 op 	if (procname != NULL)
 50 014c66b6 2023-06-25 op 		log_procname = procname;
 51 014c66b6 2023-06-25 op }
 52 014c66b6 2023-06-25 op 
 53 014c66b6 2023-06-25 op void
 54 014c66b6 2023-06-25 op log_setverbose(int v)
 55 014c66b6 2023-06-25 op {
 56 014c66b6 2023-06-25 op 	verbose = v;
 57 014c66b6 2023-06-25 op }
 58 014c66b6 2023-06-25 op 
 59 014c66b6 2023-06-25 op int
 60 014c66b6 2023-06-25 op log_getverbose(void)
 61 014c66b6 2023-06-25 op {
 62 014c66b6 2023-06-25 op 	return (verbose);
 63 014c66b6 2023-06-25 op }
 64 014c66b6 2023-06-25 op 
 65 014c66b6 2023-06-25 op void
 66 014c66b6 2023-06-25 op logit(int pri, const char *fmt, ...)
 67 014c66b6 2023-06-25 op {
 68 014c66b6 2023-06-25 op 	va_list	ap;
 69 014c66b6 2023-06-25 op 
 70 014c66b6 2023-06-25 op 	va_start(ap, fmt);
 71 014c66b6 2023-06-25 op 	vlog(pri, fmt, ap);
 72 014c66b6 2023-06-25 op 	va_end(ap);
 73 014c66b6 2023-06-25 op }
 74 014c66b6 2023-06-25 op 
 75 014c66b6 2023-06-25 op void
 76 014c66b6 2023-06-25 op vlog(int pri, const char *fmt, va_list ap)
 77 014c66b6 2023-06-25 op {
 78 014c66b6 2023-06-25 op 	char	*nfmt;
 79 014c66b6 2023-06-25 op 	int	 saved_errno = errno;
 80 014c66b6 2023-06-25 op 
 81 014c66b6 2023-06-25 op 	if (debug) {
 82 014c66b6 2023-06-25 op 		/* best effort in out of mem situations */
 83 014c66b6 2023-06-25 op 		if (asprintf(&nfmt, "%s\n", fmt) == -1) {
 84 014c66b6 2023-06-25 op 			vfprintf(stderr, fmt, ap);
 85 014c66b6 2023-06-25 op 			fprintf(stderr, "\n");
 86 014c66b6 2023-06-25 op 		} else {
 87 014c66b6 2023-06-25 op 			vfprintf(stderr, nfmt, ap);
 88 014c66b6 2023-06-25 op 			free(nfmt);
 89 014c66b6 2023-06-25 op 		}
 90 014c66b6 2023-06-25 op 		fflush(stderr);
 91 014c66b6 2023-06-25 op 	} else
 92 014c66b6 2023-06-25 op 		vsyslog(pri, fmt, ap);
 93 014c66b6 2023-06-25 op 
 94 014c66b6 2023-06-25 op 	errno = saved_errno;
 95 014c66b6 2023-06-25 op }
 96 014c66b6 2023-06-25 op 
 97 014c66b6 2023-06-25 op void
 98 014c66b6 2023-06-25 op log_warn(const char *emsg, ...)
 99 014c66b6 2023-06-25 op {
100 014c66b6 2023-06-25 op 	char		*nfmt;
101 014c66b6 2023-06-25 op 	va_list		 ap;
102 014c66b6 2023-06-25 op 	int		 saved_errno = errno;
103 014c66b6 2023-06-25 op 
104 014c66b6 2023-06-25 op 	/* best effort to even work in out of memory situations */
105 014c66b6 2023-06-25 op 	if (emsg == NULL)
106 014c66b6 2023-06-25 op 		logit(LOG_ERR, "%s", strerror(saved_errno));
107 014c66b6 2023-06-25 op 	else {
108 014c66b6 2023-06-25 op 		va_start(ap, emsg);
109 014c66b6 2023-06-25 op 
110 014c66b6 2023-06-25 op 		if (asprintf(&nfmt, "%s: %s", emsg,
111 014c66b6 2023-06-25 op 		    strerror(saved_errno)) == -1) {
112 014c66b6 2023-06-25 op 			/* we tried it... */
113 014c66b6 2023-06-25 op 			vlog(LOG_ERR, emsg, ap);
114 014c66b6 2023-06-25 op 			logit(LOG_ERR, "%s", strerror(saved_errno));
115 014c66b6 2023-06-25 op 		} else {
116 014c66b6 2023-06-25 op 			vlog(LOG_ERR, nfmt, ap);
117 014c66b6 2023-06-25 op 			free(nfmt);
118 014c66b6 2023-06-25 op 		}
119 014c66b6 2023-06-25 op 		va_end(ap);
120 014c66b6 2023-06-25 op 	}
121 014c66b6 2023-06-25 op 
122 014c66b6 2023-06-25 op 	errno = saved_errno;
123 014c66b6 2023-06-25 op }
124 014c66b6 2023-06-25 op 
125 014c66b6 2023-06-25 op void
126 014c66b6 2023-06-25 op log_warnx(const char *emsg, ...)
127 014c66b6 2023-06-25 op {
128 014c66b6 2023-06-25 op 	va_list	 ap;
129 014c66b6 2023-06-25 op 
130 014c66b6 2023-06-25 op 	va_start(ap, emsg);
131 014c66b6 2023-06-25 op 	vlog(LOG_ERR, emsg, ap);
132 014c66b6 2023-06-25 op 	va_end(ap);
133 014c66b6 2023-06-25 op }
134 014c66b6 2023-06-25 op 
135 014c66b6 2023-06-25 op void
136 014c66b6 2023-06-25 op log_info(const char *emsg, ...)
137 014c66b6 2023-06-25 op {
138 014c66b6 2023-06-25 op 	va_list	 ap;
139 014c66b6 2023-06-25 op 
140 014c66b6 2023-06-25 op 	va_start(ap, emsg);
141 014c66b6 2023-06-25 op 	vlog(LOG_INFO, emsg, ap);
142 014c66b6 2023-06-25 op 	va_end(ap);
143 014c66b6 2023-06-25 op }
144 014c66b6 2023-06-25 op 
145 014c66b6 2023-06-25 op void
146 014c66b6 2023-06-25 op log_debug(const char *emsg, ...)
147 014c66b6 2023-06-25 op {
148 014c66b6 2023-06-25 op 	va_list	 ap;
149 014c66b6 2023-06-25 op 
150 014c66b6 2023-06-25 op 	if (verbose) {
151 014c66b6 2023-06-25 op 		va_start(ap, emsg);
152 014c66b6 2023-06-25 op 		vlog(LOG_DEBUG, emsg, ap);
153 014c66b6 2023-06-25 op 		va_end(ap);
154 014c66b6 2023-06-25 op 	}
155 014c66b6 2023-06-25 op }
156 014c66b6 2023-06-25 op 
157 014c66b6 2023-06-25 op static void
158 014c66b6 2023-06-25 op vfatalc(int code, const char *emsg, va_list ap)
159 014c66b6 2023-06-25 op {
160 014c66b6 2023-06-25 op 	static char	s[BUFSIZ];
161 014c66b6 2023-06-25 op 	const char	*sep;
162 014c66b6 2023-06-25 op 
163 014c66b6 2023-06-25 op 	if (emsg != NULL) {
164 014c66b6 2023-06-25 op 		(void)vsnprintf(s, sizeof(s), emsg, ap);
165 014c66b6 2023-06-25 op 		sep = ": ";
166 014c66b6 2023-06-25 op 	} else {
167 014c66b6 2023-06-25 op 		s[0] = '\0';
168 014c66b6 2023-06-25 op 		sep = "";
169 014c66b6 2023-06-25 op 	}
170 014c66b6 2023-06-25 op 	if (code)
171 014c66b6 2023-06-25 op 		logit(LOG_CRIT, "fatal in %s: %s%s%s",
172 014c66b6 2023-06-25 op 		    log_procname, s, sep, strerror(code));
173 014c66b6 2023-06-25 op 	else
174 014c66b6 2023-06-25 op 		logit(LOG_CRIT, "fatal in %s%s%s", log_procname, sep, s);
175 014c66b6 2023-06-25 op }
176 014c66b6 2023-06-25 op 
177 014c66b6 2023-06-25 op void
178 014c66b6 2023-06-25 op fatal(const char *emsg, ...)
179 014c66b6 2023-06-25 op {
180 014c66b6 2023-06-25 op 	va_list	ap;
181 014c66b6 2023-06-25 op 
182 014c66b6 2023-06-25 op 	va_start(ap, emsg);
183 014c66b6 2023-06-25 op 	vfatalc(errno, emsg, ap);
184 014c66b6 2023-06-25 op 	va_end(ap);
185 014c66b6 2023-06-25 op 	exit(1);
186 014c66b6 2023-06-25 op }
187 014c66b6 2023-06-25 op 
188 014c66b6 2023-06-25 op void
189 014c66b6 2023-06-25 op fatalx(const char *emsg, ...)
190 014c66b6 2023-06-25 op {
191 014c66b6 2023-06-25 op 	va_list	ap;
192 014c66b6 2023-06-25 op 
193 014c66b6 2023-06-25 op 	va_start(ap, emsg);
194 014c66b6 2023-06-25 op 	vfatalc(0, emsg, ap);
195 014c66b6 2023-06-25 op 	va_end(ap);
196 014c66b6 2023-06-25 op 	exit(1);
197 014c66b6 2023-06-25 op }