1 3efd8e31 2022-10-23 thomas /*
  2 3efd8e31 2022-10-23 thomas  * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
  3 3efd8e31 2022-10-23 thomas  *
  4 3efd8e31 2022-10-23 thomas  * Permission to use, copy, modify, and distribute this software for any
  5 3efd8e31 2022-10-23 thomas  * purpose with or without fee is hereby granted, provided that the above
  6 3efd8e31 2022-10-23 thomas  * copyright notice and this permission notice appear in all copies.
  7 3efd8e31 2022-10-23 thomas  *
  8 3efd8e31 2022-10-23 thomas  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 3efd8e31 2022-10-23 thomas  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 3efd8e31 2022-10-23 thomas  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 3efd8e31 2022-10-23 thomas  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 3efd8e31 2022-10-23 thomas  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 3efd8e31 2022-10-23 thomas  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 3efd8e31 2022-10-23 thomas  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 3efd8e31 2022-10-23 thomas  */
 16 3efd8e31 2022-10-23 thomas 
 17 3efd8e31 2022-10-23 thomas #include <stdio.h>
 18 3efd8e31 2022-10-23 thomas #include <stdlib.h>
 19 3efd8e31 2022-10-23 thomas #include <stdarg.h>
 20 3efd8e31 2022-10-23 thomas #include <string.h>
 21 3efd8e31 2022-10-23 thomas #include <syslog.h>
 22 3efd8e31 2022-10-23 thomas #include <errno.h>
 23 3efd8e31 2022-10-23 thomas #include <time.h>
 24 3efd8e31 2022-10-23 thomas 
 25 3efd8e31 2022-10-23 thomas #include "log.h"
 26 3efd8e31 2022-10-23 thomas 
 27 3efd8e31 2022-10-23 thomas static int	 debug;
 28 3efd8e31 2022-10-23 thomas static int	 verbose;
 29 3efd8e31 2022-10-23 thomas const char	*log_procname;
 30 3efd8e31 2022-10-23 thomas 
 31 3efd8e31 2022-10-23 thomas void
 32 3efd8e31 2022-10-23 thomas log_init(int n_debug, int facility)
 33 3efd8e31 2022-10-23 thomas {
 34 3efd8e31 2022-10-23 thomas 	debug = n_debug;
 35 3efd8e31 2022-10-23 thomas 	verbose = n_debug;
 36 3efd8e31 2022-10-23 thomas 	log_procinit(getprogname());
 37 3efd8e31 2022-10-23 thomas 
 38 3efd8e31 2022-10-23 thomas 	if (!debug)
 39 3efd8e31 2022-10-23 thomas 		openlog(getprogname(), LOG_PID | LOG_NDELAY, facility);
 40 3efd8e31 2022-10-23 thomas 
 41 3efd8e31 2022-10-23 thomas 	tzset();
 42 3efd8e31 2022-10-23 thomas }
 43 3efd8e31 2022-10-23 thomas 
 44 3efd8e31 2022-10-23 thomas void
 45 3efd8e31 2022-10-23 thomas log_procinit(const char *procname)
 46 3efd8e31 2022-10-23 thomas {
 47 3efd8e31 2022-10-23 thomas 	if (procname != NULL)
 48 3efd8e31 2022-10-23 thomas 		log_procname = procname;
 49 3efd8e31 2022-10-23 thomas }
 50 3efd8e31 2022-10-23 thomas 
 51 3efd8e31 2022-10-23 thomas void
 52 3efd8e31 2022-10-23 thomas log_setverbose(int v)
 53 3efd8e31 2022-10-23 thomas {
 54 3efd8e31 2022-10-23 thomas 	verbose = v;
 55 3efd8e31 2022-10-23 thomas }
 56 3efd8e31 2022-10-23 thomas 
 57 3efd8e31 2022-10-23 thomas int
 58 3efd8e31 2022-10-23 thomas log_getverbose(void)
 59 3efd8e31 2022-10-23 thomas {
 60 3efd8e31 2022-10-23 thomas 	return (verbose);
 61 3efd8e31 2022-10-23 thomas }
 62 3efd8e31 2022-10-23 thomas 
 63 3efd8e31 2022-10-23 thomas void
 64 3efd8e31 2022-10-23 thomas logit(int pri, const char *fmt, ...)
 65 3efd8e31 2022-10-23 thomas {
 66 3efd8e31 2022-10-23 thomas 	va_list ap;
 67 3efd8e31 2022-10-23 thomas 
 68 3efd8e31 2022-10-23 thomas 	va_start(ap, fmt);
 69 3efd8e31 2022-10-23 thomas 	vlog(pri, fmt, ap);
 70 3efd8e31 2022-10-23 thomas 	va_end(ap);
 71 3efd8e31 2022-10-23 thomas }
 72 3efd8e31 2022-10-23 thomas 
 73 3efd8e31 2022-10-23 thomas void
 74 3efd8e31 2022-10-23 thomas vlog(int pri, const char *fmt, va_list ap)
 75 3efd8e31 2022-10-23 thomas {
 76 3efd8e31 2022-10-23 thomas 	char *nfmt;
 77 3efd8e31 2022-10-23 thomas 	int saved_errno = errno;
 78 3efd8e31 2022-10-23 thomas 
 79 3efd8e31 2022-10-23 thomas 	if (debug) {
 80 3efd8e31 2022-10-23 thomas 		/* best effort in out of mem situations */
 81 e1560d23 2023-01-08 thomas 		if (asprintf(&nfmt, "%s: %s\n", log_procname, fmt) == -1) {
 82 3efd8e31 2022-10-23 thomas 			vfprintf(stderr, fmt, ap);
 83 3efd8e31 2022-10-23 thomas 			fprintf(stderr, "\n");
 84 3efd8e31 2022-10-23 thomas 		} else {
 85 3efd8e31 2022-10-23 thomas 			vfprintf(stderr, nfmt, ap);
 86 3efd8e31 2022-10-23 thomas 			free(nfmt);
 87 3efd8e31 2022-10-23 thomas 		}
 88 3efd8e31 2022-10-23 thomas 		fflush(stderr);
 89 3efd8e31 2022-10-23 thomas 	} else
 90 3efd8e31 2022-10-23 thomas 		vsyslog(pri, fmt, ap);
 91 3efd8e31 2022-10-23 thomas 
 92 3efd8e31 2022-10-23 thomas 	errno = saved_errno;
 93 3efd8e31 2022-10-23 thomas }
 94 3efd8e31 2022-10-23 thomas 
 95 3efd8e31 2022-10-23 thomas void
 96 3efd8e31 2022-10-23 thomas log_warn(const char *emsg, ...)
 97 3efd8e31 2022-10-23 thomas {
 98 3efd8e31 2022-10-23 thomas 	char *nfmt;
 99 3efd8e31 2022-10-23 thomas 	va_list ap;
100 3efd8e31 2022-10-23 thomas 	int saved_errno = errno;
101 3efd8e31 2022-10-23 thomas 
102 3efd8e31 2022-10-23 thomas 	/* best effort to even work in out of memory situations */
103 3efd8e31 2022-10-23 thomas 	if (emsg == NULL)
104 3efd8e31 2022-10-23 thomas 		logit(LOG_CRIT, "%s", strerror(saved_errno));
105 3efd8e31 2022-10-23 thomas 	else {
106 3efd8e31 2022-10-23 thomas 		va_start(ap, emsg);
107 3efd8e31 2022-10-23 thomas 
108 3efd8e31 2022-10-23 thomas 		if (asprintf(&nfmt, "%s: %s", emsg,
109 3efd8e31 2022-10-23 thomas 		    strerror(saved_errno)) == -1) {
110 3efd8e31 2022-10-23 thomas 			/* we tried it... */
111 3efd8e31 2022-10-23 thomas 			vlog(LOG_CRIT, emsg, ap);
112 3efd8e31 2022-10-23 thomas 			logit(LOG_CRIT, "%s", strerror(saved_errno));
113 3efd8e31 2022-10-23 thomas 		} else {
114 3efd8e31 2022-10-23 thomas 			vlog(LOG_CRIT, nfmt, ap);
115 3efd8e31 2022-10-23 thomas 			free(nfmt);
116 3efd8e31 2022-10-23 thomas 		}
117 3efd8e31 2022-10-23 thomas 		va_end(ap);
118 3efd8e31 2022-10-23 thomas 	}
119 3efd8e31 2022-10-23 thomas 
120 3efd8e31 2022-10-23 thomas 	errno = saved_errno;
121 3efd8e31 2022-10-23 thomas }
122 3efd8e31 2022-10-23 thomas 
123 3efd8e31 2022-10-23 thomas void
124 3efd8e31 2022-10-23 thomas log_warnx(const char *emsg, ...)
125 3efd8e31 2022-10-23 thomas {
126 3efd8e31 2022-10-23 thomas 	va_list ap;
127 3efd8e31 2022-10-23 thomas 
128 3efd8e31 2022-10-23 thomas 	va_start(ap, emsg);
129 3efd8e31 2022-10-23 thomas 	vlog(LOG_CRIT, emsg, ap);
130 3efd8e31 2022-10-23 thomas 	va_end(ap);
131 3efd8e31 2022-10-23 thomas }
132 3efd8e31 2022-10-23 thomas 
133 3efd8e31 2022-10-23 thomas void
134 3efd8e31 2022-10-23 thomas log_info(const char *emsg, ...)
135 3efd8e31 2022-10-23 thomas {
136 3efd8e31 2022-10-23 thomas 	va_list ap;
137 3efd8e31 2022-10-23 thomas 
138 3efd8e31 2022-10-23 thomas 	va_start(ap, emsg);
139 3efd8e31 2022-10-23 thomas 	vlog(LOG_INFO, emsg, ap);
140 3efd8e31 2022-10-23 thomas 	va_end(ap);
141 3efd8e31 2022-10-23 thomas }
142 3efd8e31 2022-10-23 thomas 
143 3efd8e31 2022-10-23 thomas void
144 3efd8e31 2022-10-23 thomas log_debug(const char *emsg, ...)
145 3efd8e31 2022-10-23 thomas {
146 3efd8e31 2022-10-23 thomas 	va_list ap;
147 3efd8e31 2022-10-23 thomas 
148 3efd8e31 2022-10-23 thomas 	if (verbose) {
149 3efd8e31 2022-10-23 thomas 		va_start(ap, emsg);
150 3efd8e31 2022-10-23 thomas 		vlog(LOG_DEBUG, emsg, ap);
151 3efd8e31 2022-10-23 thomas 		va_end(ap);
152 3efd8e31 2022-10-23 thomas 	}
153 3efd8e31 2022-10-23 thomas }
154 3efd8e31 2022-10-23 thomas 
155 3efd8e31 2022-10-23 thomas static void
156 3efd8e31 2022-10-23 thomas vfatalc(int code, const char *emsg, va_list ap)
157 3efd8e31 2022-10-23 thomas {
158 3efd8e31 2022-10-23 thomas 	static char s[BUFSIZ];
159 3efd8e31 2022-10-23 thomas 	const char *sep;
160 3efd8e31 2022-10-23 thomas 
161 3efd8e31 2022-10-23 thomas 	if (emsg != NULL) {
162 3efd8e31 2022-10-23 thomas 		(void)vsnprintf(s, sizeof(s), emsg, ap);
163 3efd8e31 2022-10-23 thomas 		sep = ": ";
164 3efd8e31 2022-10-23 thomas 	} else {
165 3efd8e31 2022-10-23 thomas 		s[0] = '\0';
166 3efd8e31 2022-10-23 thomas 		sep = "";
167 3efd8e31 2022-10-23 thomas 	}
168 3efd8e31 2022-10-23 thomas 	if (code)
169 a6d87ea2 2023-02-07 thomas 		logit(LOG_CRIT, "%s%s%s", s, sep, strerror(code));
170 3efd8e31 2022-10-23 thomas 	else
171 a6d87ea2 2023-02-07 thomas 		logit(LOG_CRIT, "%s", s);
172 3efd8e31 2022-10-23 thomas }
173 3efd8e31 2022-10-23 thomas 
174 3efd8e31 2022-10-23 thomas void
175 3efd8e31 2022-10-23 thomas fatal(const char *emsg, ...)
176 3efd8e31 2022-10-23 thomas {
177 3efd8e31 2022-10-23 thomas 	va_list ap;
178 3efd8e31 2022-10-23 thomas 
179 3efd8e31 2022-10-23 thomas 	va_start(ap, emsg);
180 3efd8e31 2022-10-23 thomas 	vfatalc(errno, emsg, ap);
181 3efd8e31 2022-10-23 thomas 	va_end(ap);
182 3efd8e31 2022-10-23 thomas 	exit(1);
183 3efd8e31 2022-10-23 thomas }
184 3efd8e31 2022-10-23 thomas 
185 3efd8e31 2022-10-23 thomas void
186 3efd8e31 2022-10-23 thomas fatalx(const char *emsg, ...)
187 3efd8e31 2022-10-23 thomas {
188 3efd8e31 2022-10-23 thomas 	va_list ap;
189 3efd8e31 2022-10-23 thomas 
190 3efd8e31 2022-10-23 thomas 	va_start(ap, emsg);
191 3efd8e31 2022-10-23 thomas 	vfatalc(0, emsg, ap);
192 3efd8e31 2022-10-23 thomas 	va_end(ap);
193 3efd8e31 2022-10-23 thomas 	exit(1);
194 3efd8e31 2022-10-23 thomas }