Annotation of src/usr.bin/tmux/log.c, Revision 1.27
1.27 ! nicm 1: /* $OpenBSD: log.c,v 1.26 2019/09/24 20:44:58 nicm Exp $ */
1.1 nicm 2:
3: /*
1.23 nicm 4: * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
1.1 nicm 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>
1.20 nicm 25: #include <unistd.h>
1.15 nicm 26: #include <vis.h>
1.1 nicm 27:
28: #include "tmux.h"
29:
1.20 nicm 30: static FILE *log_file;
31: static int log_level;
1.1 nicm 32:
1.20 nicm 33: static void log_event_cb(int, const char *);
34: static void log_vwrite(const char *, va_list);
1.1 nicm 35:
1.5 nicm 36: /* Log callback for libevent. */
1.20 nicm 37: static void
1.19 nicm 38: log_event_cb(__unused int severity, const char *msg)
1.5 nicm 39: {
1.9 nicm 40: log_debug("%s", msg);
1.5 nicm 41: }
42:
1.20 nicm 43: /* Increment log level. */
44: void
45: log_add_level(void)
46: {
47: log_level++;
48: }
49:
50: /* Get log level. */
51: int
52: log_get_level(void)
53: {
54: return (log_level);
55: }
56:
1.1 nicm 57: /* Open logging to file. */
58: void
1.20 nicm 59: log_open(const char *name)
1.1 nicm 60: {
1.20 nicm 61: char *path;
62:
63: if (log_level == 0)
64: return;
1.25 nicm 65: log_close();
1.17 nicm 66:
1.20 nicm 67: xasprintf(&path, "tmux-%s-%ld.log", name, (long)getpid());
1.25 nicm 68: log_file = fopen(path, "a");
1.20 nicm 69: free(path);
1.1 nicm 70: if (log_file == NULL)
71: return;
72:
1.12 millert 73: setvbuf(log_file, NULL, _IOLBF, 0);
1.5 nicm 74: event_set_log_callback(log_event_cb);
1.25 nicm 75: }
76:
77: /* Toggle logging. */
78: void
79: log_toggle(const char *name)
80: {
81: if (log_level == 0) {
82: log_level = 1;
83: log_open(name);
84: log_debug("log opened");
85: } else {
86: log_debug("log closed");
87: log_level = 0;
88: log_close();
89: }
1.1 nicm 90: }
91:
92: /* Close logging. */
93: void
94: log_close(void)
95: {
1.8 nicm 96: if (log_file != NULL)
1.1 nicm 97: fclose(log_file);
1.10 nicm 98: log_file = NULL;
1.5 nicm 99:
100: event_set_log_callback(NULL);
1.1 nicm 101: }
102:
103: /* Write a log message. */
1.20 nicm 104: static void
1.7 nicm 105: log_vwrite(const char *msg, va_list ap)
1.1 nicm 106: {
1.15 nicm 107: char *fmt, *out;
1.14 nicm 108: struct timeval tv;
1.8 nicm 109:
110: if (log_file == NULL)
111: return;
1.1 nicm 112:
1.15 nicm 113: if (vasprintf(&fmt, msg, ap) == -1)
1.27 ! nicm 114: return;
! 115: if (stravis(&out, fmt, VIS_OCTAL|VIS_CSTYLE|VIS_TAB|VIS_NL) == -1) {
! 116: free(fmt);
! 117: return;
! 118: }
1.15 nicm 119:
1.14 nicm 120: gettimeofday(&tv, NULL);
1.15 nicm 121: if (fprintf(log_file, "%lld.%06d %s\n", (long long)tv.tv_sec,
1.27 ! nicm 122: (int)tv.tv_usec, out) != -1)
! 123: fflush(log_file);
1.15 nicm 124:
125: free(out);
1.7 nicm 126: free(fmt);
1.1 nicm 127: }
128:
129: /* Log a debug message. */
1.11 nicm 130: void
1.1 nicm 131: log_debug(const char *msg, ...)
132: {
133: va_list ap;
1.26 nicm 134:
135: if (log_file == NULL)
136: return;
1.1 nicm 137:
1.10 nicm 138: va_start(ap, msg);
139: log_vwrite(msg, ap);
140: va_end(ap);
1.1 nicm 141: }
142:
1.10 nicm 143: /* Log a critical error with error string and die. */
1.11 nicm 144: __dead void
1.18 nicm 145: fatal(const char *msg, ...)
1.1 nicm 146: {
1.10 nicm 147: char *fmt;
148: va_list ap;
1.1 nicm 149:
150: va_start(ap, msg);
1.10 nicm 151: if (asprintf(&fmt, "fatal: %s: %s", msg, strerror(errno)) == -1)
152: exit(1);
153: log_vwrite(fmt, ap);
1.24 nicm 154: va_end(ap);
1.10 nicm 155: exit(1);
1.1 nicm 156: }
157:
158: /* Log a critical error and die. */
1.11 nicm 159: __dead void
1.18 nicm 160: fatalx(const char *msg, ...)
1.1 nicm 161: {
1.10 nicm 162: char *fmt;
163: va_list ap;
1.1 nicm 164:
165: va_start(ap, msg);
1.10 nicm 166: if (asprintf(&fmt, "fatal: %s", msg) == -1)
167: exit(1);
168: log_vwrite(fmt, ap);
1.24 nicm 169: va_end(ap);
1.10 nicm 170: exit(1);
1.1 nicm 171: }