1 13b2bc37 2022-10-23 stsp /*
  2 13b2bc37 2022-10-23 stsp  * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
  3 13b2bc37 2022-10-23 stsp  *
  4 13b2bc37 2022-10-23 stsp  * Permission to use, copy, modify, and distribute this software for any
  5 13b2bc37 2022-10-23 stsp  * purpose with or without fee is hereby granted, provided that the above
  6 13b2bc37 2022-10-23 stsp  * copyright notice and this permission notice appear in all copies.
  7 13b2bc37 2022-10-23 stsp  *
  8 13b2bc37 2022-10-23 stsp  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 13b2bc37 2022-10-23 stsp  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 13b2bc37 2022-10-23 stsp  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 13b2bc37 2022-10-23 stsp  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 13b2bc37 2022-10-23 stsp  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 13b2bc37 2022-10-23 stsp  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 13b2bc37 2022-10-23 stsp  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 13b2bc37 2022-10-23 stsp  */
 16 13b2bc37 2022-10-23 stsp 
 17 13b2bc37 2022-10-23 stsp #include <stdio.h>
 18 13b2bc37 2022-10-23 stsp #include <stdlib.h>
 19 13b2bc37 2022-10-23 stsp #include <stdarg.h>
 20 13b2bc37 2022-10-23 stsp #include <string.h>
 21 13b2bc37 2022-10-23 stsp #include <syslog.h>
 22 13b2bc37 2022-10-23 stsp #include <errno.h>
 23 13b2bc37 2022-10-23 stsp #include <time.h>
 24 13b2bc37 2022-10-23 stsp 
 25 13b2bc37 2022-10-23 stsp #include "log.h"
 26 13b2bc37 2022-10-23 stsp 
 27 13b2bc37 2022-10-23 stsp static int	 debug;
 28 13b2bc37 2022-10-23 stsp static int	 verbose;
 29 13b2bc37 2022-10-23 stsp const char	*log_procname;
 30 13b2bc37 2022-10-23 stsp 
 31 13b2bc37 2022-10-23 stsp void
 32 13b2bc37 2022-10-23 stsp log_init(int n_debug, int facility)
 33 13b2bc37 2022-10-23 stsp {
 34 13b2bc37 2022-10-23 stsp 	debug = n_debug;
 35 13b2bc37 2022-10-23 stsp 	verbose = n_debug;
 36 13b2bc37 2022-10-23 stsp 	log_procinit(getprogname());
 37 13b2bc37 2022-10-23 stsp 
 38 13b2bc37 2022-10-23 stsp 	if (!debug)
 39 13b2bc37 2022-10-23 stsp 		openlog(getprogname(), LOG_PID | LOG_NDELAY, facility);
 40 13b2bc37 2022-10-23 stsp 
 41 13b2bc37 2022-10-23 stsp 	tzset();
 42 13b2bc37 2022-10-23 stsp }
 43 13b2bc37 2022-10-23 stsp 
 44 13b2bc37 2022-10-23 stsp void
 45 13b2bc37 2022-10-23 stsp log_procinit(const char *procname)
 46 13b2bc37 2022-10-23 stsp {
 47 13b2bc37 2022-10-23 stsp 	if (procname != NULL)
 48 13b2bc37 2022-10-23 stsp 		log_procname = procname;
 49 13b2bc37 2022-10-23 stsp }
 50 13b2bc37 2022-10-23 stsp 
 51 13b2bc37 2022-10-23 stsp void
 52 13b2bc37 2022-10-23 stsp log_setverbose(int v)
 53 13b2bc37 2022-10-23 stsp {
 54 13b2bc37 2022-10-23 stsp 	verbose = v;
 55 13b2bc37 2022-10-23 stsp }
 56 13b2bc37 2022-10-23 stsp 
 57 13b2bc37 2022-10-23 stsp int
 58 13b2bc37 2022-10-23 stsp log_getverbose(void)
 59 13b2bc37 2022-10-23 stsp {
 60 13b2bc37 2022-10-23 stsp 	return (verbose);
 61 13b2bc37 2022-10-23 stsp }
 62 13b2bc37 2022-10-23 stsp 
 63 13b2bc37 2022-10-23 stsp void
 64 13b2bc37 2022-10-23 stsp logit(int pri, const char *fmt, ...)
 65 13b2bc37 2022-10-23 stsp {
 66 13b2bc37 2022-10-23 stsp 	va_list ap;
 67 13b2bc37 2022-10-23 stsp 
 68 13b2bc37 2022-10-23 stsp 	va_start(ap, fmt);
 69 13b2bc37 2022-10-23 stsp 	vlog(pri, fmt, ap);
 70 13b2bc37 2022-10-23 stsp 	va_end(ap);
 71 13b2bc37 2022-10-23 stsp }
 72 13b2bc37 2022-10-23 stsp 
 73 13b2bc37 2022-10-23 stsp void
 74 13b2bc37 2022-10-23 stsp vlog(int pri, const char *fmt, va_list ap)
 75 13b2bc37 2022-10-23 stsp {
 76 13b2bc37 2022-10-23 stsp 	char *nfmt;
 77 13b2bc37 2022-10-23 stsp 	int saved_errno = errno;
 78 13b2bc37 2022-10-23 stsp 
 79 13b2bc37 2022-10-23 stsp 	if (debug) {
 80 13b2bc37 2022-10-23 stsp 		/* best effort in out of mem situations */
 81 6b5e6124 2023-01-08 stsp 		if (asprintf(&nfmt, "%s: %s\n", log_procname, fmt) == -1) {
 82 13b2bc37 2022-10-23 stsp 			vfprintf(stderr, fmt, ap);
 83 13b2bc37 2022-10-23 stsp 			fprintf(stderr, "\n");
 84 13b2bc37 2022-10-23 stsp 		} else {
 85 13b2bc37 2022-10-23 stsp 			vfprintf(stderr, nfmt, ap);
 86 13b2bc37 2022-10-23 stsp 			free(nfmt);
 87 13b2bc37 2022-10-23 stsp 		}
 88 13b2bc37 2022-10-23 stsp 		fflush(stderr);
 89 13b2bc37 2022-10-23 stsp 	} else
 90 13b2bc37 2022-10-23 stsp 		vsyslog(pri, fmt, ap);
 91 13b2bc37 2022-10-23 stsp 
 92 13b2bc37 2022-10-23 stsp 	errno = saved_errno;
 93 13b2bc37 2022-10-23 stsp }
 94 13b2bc37 2022-10-23 stsp 
 95 13b2bc37 2022-10-23 stsp void
 96 13b2bc37 2022-10-23 stsp log_warn(const char *emsg, ...)
 97 13b2bc37 2022-10-23 stsp {
 98 13b2bc37 2022-10-23 stsp 	char *nfmt;
 99 13b2bc37 2022-10-23 stsp 	va_list ap;
100 13b2bc37 2022-10-23 stsp 	int saved_errno = errno;
101 13b2bc37 2022-10-23 stsp 
102 13b2bc37 2022-10-23 stsp 	/* best effort to even work in out of memory situations */
103 13b2bc37 2022-10-23 stsp 	if (emsg == NULL)
104 13b2bc37 2022-10-23 stsp 		logit(LOG_CRIT, "%s", strerror(saved_errno));
105 13b2bc37 2022-10-23 stsp 	else {
106 13b2bc37 2022-10-23 stsp 		va_start(ap, emsg);
107 13b2bc37 2022-10-23 stsp 
108 13b2bc37 2022-10-23 stsp 		if (asprintf(&nfmt, "%s: %s", emsg,
109 13b2bc37 2022-10-23 stsp 		    strerror(saved_errno)) == -1) {
110 13b2bc37 2022-10-23 stsp 			/* we tried it... */
111 13b2bc37 2022-10-23 stsp 			vlog(LOG_CRIT, emsg, ap);
112 13b2bc37 2022-10-23 stsp 			logit(LOG_CRIT, "%s", strerror(saved_errno));
113 13b2bc37 2022-10-23 stsp 		} else {
114 13b2bc37 2022-10-23 stsp 			vlog(LOG_CRIT, nfmt, ap);
115 13b2bc37 2022-10-23 stsp 			free(nfmt);
116 13b2bc37 2022-10-23 stsp 		}
117 13b2bc37 2022-10-23 stsp 		va_end(ap);
118 13b2bc37 2022-10-23 stsp 	}
119 13b2bc37 2022-10-23 stsp 
120 13b2bc37 2022-10-23 stsp 	errno = saved_errno;
121 13b2bc37 2022-10-23 stsp }
122 13b2bc37 2022-10-23 stsp 
123 13b2bc37 2022-10-23 stsp void
124 13b2bc37 2022-10-23 stsp log_warnx(const char *emsg, ...)
125 13b2bc37 2022-10-23 stsp {
126 13b2bc37 2022-10-23 stsp 	va_list ap;
127 13b2bc37 2022-10-23 stsp 
128 13b2bc37 2022-10-23 stsp 	va_start(ap, emsg);
129 13b2bc37 2022-10-23 stsp 	vlog(LOG_CRIT, emsg, ap);
130 13b2bc37 2022-10-23 stsp 	va_end(ap);
131 13b2bc37 2022-10-23 stsp }
132 13b2bc37 2022-10-23 stsp 
133 13b2bc37 2022-10-23 stsp void
134 13b2bc37 2022-10-23 stsp log_info(const char *emsg, ...)
135 13b2bc37 2022-10-23 stsp {
136 13b2bc37 2022-10-23 stsp 	va_list ap;
137 13b2bc37 2022-10-23 stsp 
138 13b2bc37 2022-10-23 stsp 	va_start(ap, emsg);
139 13b2bc37 2022-10-23 stsp 	vlog(LOG_INFO, emsg, ap);
140 13b2bc37 2022-10-23 stsp 	va_end(ap);
141 13b2bc37 2022-10-23 stsp }
142 13b2bc37 2022-10-23 stsp 
143 13b2bc37 2022-10-23 stsp void
144 13b2bc37 2022-10-23 stsp log_debug(const char *emsg, ...)
145 13b2bc37 2022-10-23 stsp {
146 13b2bc37 2022-10-23 stsp 	va_list ap;
147 13b2bc37 2022-10-23 stsp 
148 13b2bc37 2022-10-23 stsp 	if (verbose) {
149 13b2bc37 2022-10-23 stsp 		va_start(ap, emsg);
150 13b2bc37 2022-10-23 stsp 		vlog(LOG_DEBUG, emsg, ap);
151 13b2bc37 2022-10-23 stsp 		va_end(ap);
152 13b2bc37 2022-10-23 stsp 	}
153 13b2bc37 2022-10-23 stsp }
154 13b2bc37 2022-10-23 stsp 
155 13b2bc37 2022-10-23 stsp static void
156 13b2bc37 2022-10-23 stsp vfatalc(int code, const char *emsg, va_list ap)
157 13b2bc37 2022-10-23 stsp {
158 13b2bc37 2022-10-23 stsp 	static char s[BUFSIZ];
159 13b2bc37 2022-10-23 stsp 	const char *sep;
160 13b2bc37 2022-10-23 stsp 
161 13b2bc37 2022-10-23 stsp 	if (emsg != NULL) {
162 13b2bc37 2022-10-23 stsp 		(void)vsnprintf(s, sizeof(s), emsg, ap);
163 13b2bc37 2022-10-23 stsp 		sep = ": ";
164 13b2bc37 2022-10-23 stsp 	} else {
165 13b2bc37 2022-10-23 stsp 		s[0] = '\0';
166 13b2bc37 2022-10-23 stsp 		sep = "";
167 13b2bc37 2022-10-23 stsp 	}
168 13b2bc37 2022-10-23 stsp 	if (code)
169 ba4dfaf7 2023-02-07 mark 		logit(LOG_CRIT, "%s%s%s", s, sep, strerror(code));
170 13b2bc37 2022-10-23 stsp 	else
171 ba4dfaf7 2023-02-07 mark 		logit(LOG_CRIT, "%s", s);
172 13b2bc37 2022-10-23 stsp }
173 13b2bc37 2022-10-23 stsp 
174 13b2bc37 2022-10-23 stsp void
175 13b2bc37 2022-10-23 stsp fatal(const char *emsg, ...)
176 13b2bc37 2022-10-23 stsp {
177 13b2bc37 2022-10-23 stsp 	va_list ap;
178 13b2bc37 2022-10-23 stsp 
179 13b2bc37 2022-10-23 stsp 	va_start(ap, emsg);
180 13b2bc37 2022-10-23 stsp 	vfatalc(errno, emsg, ap);
181 13b2bc37 2022-10-23 stsp 	va_end(ap);
182 13b2bc37 2022-10-23 stsp 	exit(1);
183 13b2bc37 2022-10-23 stsp }
184 13b2bc37 2022-10-23 stsp 
185 13b2bc37 2022-10-23 stsp void
186 13b2bc37 2022-10-23 stsp fatalx(const char *emsg, ...)
187 13b2bc37 2022-10-23 stsp {
188 13b2bc37 2022-10-23 stsp 	va_list ap;
189 13b2bc37 2022-10-23 stsp 
190 13b2bc37 2022-10-23 stsp 	va_start(ap, emsg);
191 13b2bc37 2022-10-23 stsp 	vfatalc(0, emsg, ap);
192 13b2bc37 2022-10-23 stsp 	va_end(ap);
193 13b2bc37 2022-10-23 stsp 	exit(1);
194 13b2bc37 2022-10-23 stsp }