1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
/* $OpenBSD: log.c,v 1.31 2022/05/30 12:55:25 nicm Exp $ */
/*
* Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <vis.h>
#include "tmux.h"
static FILE *log_file;
static int log_level;
/* Log callback for libevent. */
static void
log_event_cb(__unused int severity, const char *msg)
{
log_debug("%s", msg);
}
/* Increment log level. */
void
log_add_level(void)
{
log_level++;
}
/* Get log level. */
int
log_get_level(void)
{
return (log_level);
}
/* Open logging to file. */
void
log_open(const char *name)
{
char *path;
if (log_level == 0)
return;
log_close();
xasprintf(&path, "tmux-%s-%ld.log", name, (long)getpid());
log_file = fopen(path, "a");
free(path);
if (log_file == NULL)
return;
setvbuf(log_file, NULL, _IOLBF, 0);
event_set_log_callback(log_event_cb);
}
/* Toggle logging. */
void
log_toggle(const char *name)
{
if (log_level == 0) {
log_level = 1;
log_open(name);
log_debug("log opened");
} else {
log_debug("log closed");
log_level = 0;
log_close();
}
}
/* Close logging. */
void
log_close(void)
{
if (log_file != NULL)
fclose(log_file);
log_file = NULL;
event_set_log_callback(NULL);
}
/* Write a log message. */
static void printflike(1, 0)
log_vwrite(const char *msg, va_list ap, const char *prefix)
{
char *s, *out;
struct timeval tv;
if (log_file == NULL)
return;
if (vasprintf(&s, msg, ap) == -1)
return;
if (stravis(&out, s, VIS_OCTAL|VIS_CSTYLE|VIS_TAB|VIS_NL) == -1) {
free(s);
return;
}
free(s);
gettimeofday(&tv, NULL);
if (fprintf(log_file, "%lld.%06d %s%s\n", (long long)tv.tv_sec,
(int)tv.tv_usec, prefix, out) != -1)
fflush(log_file);
free(out);
}
/* Log a debug message. */
void
log_debug(const char *msg, ...)
{
va_list ap;
if (log_file == NULL)
return;
va_start(ap, msg);
log_vwrite(msg, ap, "");
va_end(ap);
}
/* Log a critical error with error string and die. */
__dead void
fatal(const char *msg, ...)
{
char tmp[256];
va_list ap;
if (snprintf(tmp, sizeof tmp, "fatal: %s: ", strerror(errno)) < 0)
exit(1);
va_start(ap, msg);
log_vwrite(msg, ap, tmp);
va_end(ap);
exit(1);
}
/* Log a critical error and die. */
__dead void
fatalx(const char *msg, ...)
{
va_list ap;
va_start(ap, msg);
log_vwrite(msg, ap, "fatal: ");
va_end(ap);
exit(1);
}
|
