Annotation of src/usr.bin/tmux/log.c, Revision 1.7
1.7 ! nicm 1: /* $OpenBSD: log.c,v 1.6 2012/03/17 18:38:58 nicm Exp $ */
1.1 nicm 2:
3: /*
4: * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15: * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16: * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
18:
19: #include <sys/types.h>
20:
21: #include <errno.h>
22: #include <stdio.h>
23: #include <stdlib.h>
24: #include <string.h>
25: #include <syslog.h>
26: #include <time.h>
27:
28: #include "tmux.h"
29:
30: /* Log file, if needed. */
1.7 ! nicm 31: FILE *log_file = stderr;
1.1 nicm 32:
33: /* Debug level. */
1.7 ! nicm 34: int log_level = 0;
1.1 nicm 35:
1.6 nicm 36: void log_event_cb(int, const char *);
1.7 ! nicm 37: void log_vwrite(const char *, va_list);
1.2 nicm 38: __dead void log_vfatal(const char *, va_list);
1.1 nicm 39:
1.5 nicm 40: /* Log callback for libevent. */
41: void
42: log_event_cb(unused int severity, const char *msg)
43: {
1.6 nicm 44: log_warnx("%s", msg);
1.5 nicm 45: }
46:
1.1 nicm 47: /* Open logging to file. */
48: void
1.7 ! nicm 49: log_open(int level, const char *path)
1.1 nicm 50: {
51: log_file = fopen(path, "w");
52: if (log_file == NULL)
53: return;
54: log_level = level;
55:
56: setlinebuf(log_file);
1.5 nicm 57: event_set_log_callback(log_event_cb);
1.1 nicm 58:
59: tzset();
60: }
61:
62: /* Close logging. */
63: void
64: log_close(void)
65: {
1.7 ! nicm 66: if (log_file != stderr)
1.1 nicm 67: fclose(log_file);
1.5 nicm 68:
69: event_set_log_callback(NULL);
1.1 nicm 70: }
71:
72: /* Write a log message. */
73: void
1.7 ! nicm 74: log_vwrite(const char *msg, va_list ap)
1.1 nicm 75: {
76: char *fmt;
77:
1.7 ! nicm 78: if (asprintf(&fmt, "%s\n", msg) == -1)
! 79: exit(1);
! 80: if (vfprintf(log_file, fmt, ap) == -1)
! 81: exit(1);
! 82: fflush(log_file);
! 83: free(fmt);
1.1 nicm 84: }
85:
86: /* Log a warning with error string. */
87: void printflike1
88: log_warn(const char *msg, ...)
89: {
90: va_list ap;
91: char *fmt;
92:
93: va_start(ap, msg);
94: if (asprintf(&fmt, "%s: %s", msg, strerror(errno)) == -1)
95: exit(1);
1.7 ! nicm 96: log_vwrite(fmt, ap);
1.1 nicm 97: free(fmt);
98: va_end(ap);
99: }
100:
101: /* Log a warning. */
102: void printflike1
103: log_warnx(const char *msg, ...)
104: {
105: va_list ap;
106:
107: va_start(ap, msg);
1.7 ! nicm 108: log_vwrite(msg, ap);
1.1 nicm 109: va_end(ap);
110: }
111:
112: /* Log an informational message. */
113: void printflike1
114: log_info(const char *msg, ...)
115: {
116: va_list ap;
117:
118: if (log_level > -1) {
119: va_start(ap, msg);
1.7 ! nicm 120: log_vwrite(msg, ap);
1.1 nicm 121: va_end(ap);
122: }
123: }
124:
125: /* Log a debug message. */
126: void printflike1
127: log_debug(const char *msg, ...)
128: {
129: va_list ap;
130:
131: if (log_level > 0) {
132: va_start(ap, msg);
1.7 ! nicm 133: log_vwrite(msg, ap);
1.1 nicm 134: va_end(ap);
135: }
136: }
137:
138: /* Log a debug message at level 2. */
139: void printflike1
140: log_debug2(const char *msg, ...)
141: {
142: va_list ap;
143:
144: if (log_level > 1) {
145: va_start(ap, msg);
1.7 ! nicm 146: log_vwrite(msg, ap);
1.1 nicm 147: va_end(ap);
148: }
149: }
150:
151: /* Log a critical error, with error string if necessary, and die. */
152: __dead void
153: log_vfatal(const char *msg, va_list ap)
154: {
155: char *fmt;
156:
157: if (errno != 0) {
158: if (asprintf(&fmt, "fatal: %s: %s", msg, strerror(errno)) == -1)
159: exit(1);
1.7 ! nicm 160: log_vwrite(fmt, ap);
1.1 nicm 161: } else {
162: if (asprintf(&fmt, "fatal: %s", msg) == -1)
1.4 nicm 163: exit(1);
1.7 ! nicm 164: log_vwrite(fmt, ap);
1.1 nicm 165: }
166: free(fmt);
167:
168: exit(1);
169: }
170:
171: /* Log a critical error, with error string, and die. */
172: __dead void printflike1
173: log_fatal(const char *msg, ...)
174: {
175: va_list ap;
176:
177: va_start(ap, msg);
178: log_vfatal(msg, ap);
179: }
180:
181: /* Log a critical error and die. */
182: __dead void printflike1
183: log_fatalx(const char *msg, ...)
184: {
185: va_list ap;
186:
187: errno = 0;
188: va_start(ap, msg);
189: log_vfatal(msg, ap);
190: }
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