1 /* $Id$ */
2
3 /*
4 * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
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 <time.h>
26 #include <unistd.h>
27
28 #include "tmux.h"
29 #include "tmate.h"
30
31 FILE *log_file;
32
33 static void log_event_cb(int, const char *);
34 static void log_vwrite(const char *, va_list);
35
36 static int log_level;
37 char *log_prefix;
38
39 static void
log_event_cb(__unused int severity,const char * msg)40 log_event_cb(__unused int severity, const char *msg)
41 {
42 log_debug("%s", msg);
43 }
44
45 /* Increment log level. */
46 void
log_add_level(void)47 log_add_level(void)
48 {
49 log_level++;
50 }
51
52 /* Get log level. */
53 int
log_get_level(void)54 log_get_level(void)
55 {
56 return log_level;
57 }
58
init_logging(int _log_level)59 void init_logging(int _log_level)
60 {
61 log_level = _log_level;
62 log_prefix = xstrdup("");
63
64 log_file = fdopen(dup(STDERR_FILENO), "a");
65 if (!log_file)
66 exit(1);
67
68 event_set_log_callback(log_event_cb);
69 }
70
set_log_prefix(char * _log_prefix)71 void set_log_prefix(char *_log_prefix)
72 {
73 free(log_prefix);
74 log_prefix = xstrdup(_log_prefix);
75 }
76
77 /* Write a log message. */
78 __attribute__((__format__(__printf__, 1, 0)))
79 static void
log_vwrite(const char * msg,va_list ap)80 log_vwrite(const char *msg, va_list ap)
81 {
82 char *fmt, *out;
83 struct timeval tv;
84
85 if (log_file == NULL)
86 return;
87
88 if (vasprintf(&fmt, msg, ap) == -1)
89 exit(1);
90 if (stravis(&out, fmt, VIS_OCTAL|VIS_CSTYLE|VIS_TAB|VIS_NL) == -1)
91 exit(1);
92
93 if (fprintf(log_file, "%s%s\n", log_prefix, out) == -1)
94 exit(1);
95
96 fflush(log_file);
97
98 free(out);
99 free(fmt);
100 }
101
102 void
log_emit(int level,const char * msg,...)103 log_emit(int level, const char *msg, ...)
104 {
105 va_list ap;
106
107 if (log_level < level)
108 return;
109
110 va_start(ap, msg);
111 log_vwrite(msg, ap);
112 va_end(ap);
113 }
114
115 /* Log a critical error with error string and die. */
116 __attribute__((__format__(__printf__, 1, 0)))
117 __dead void
fatal(const char * msg,...)118 fatal(const char *msg, ...)
119 {
120 char *fmt;
121 va_list ap;
122
123 va_start(ap, msg);
124 if (asprintf(&fmt, "fatal: %s: %s", msg, strerror(errno)) == -1)
125 exit(1);
126 msg = fmt;
127 log_vwrite(msg, ap);
128 exit(1);
129 }
130
131 /* Log a critical error and die. */
132 __attribute__((__format__(__printf__, 1, 0)))
133 __dead void
fatalx(const char * msg,...)134 fatalx(const char *msg, ...)
135 {
136 char *fmt;
137 va_list ap;
138
139 va_start(ap, msg);
140 if (asprintf(&fmt, "fatal: %s", msg) == -1)
141 exit(1);
142 msg = fmt;
143 log_vwrite(msg, ap);
144 exit(1);
145 }
146