summaryrefslogtreecommitdiffstats
path: root/sysdep/unix/log.c
blob: f8b960a14795b68ffdbca6c1645896ee8bcbd3f2 (plain)
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
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
/*
 *	BIRD Library -- Logging Functions
 *
 *	(c) 1998--1999 Martin Mares <mj@ucw.cz>
 *
 *	Can be freely distributed and used under the terms of the GNU GPL.
 */

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <sys/time.h>

#include "nest/bird.h"
#include "nest/cli.h"
#include "lib/string.h"
#include "lib/lists.h"
#include "lib/unix.h"

static FILE *dbgf = NULL;
static list *current_log_list;
static list init_log_list;

#ifdef HAVE_SYSLOG
#include <sys/syslog.h>

static int syslog_priorities[] = {
  LOG_DEBUG,
  LOG_DEBUG,
  LOG_DEBUG,
  LOG_INFO,
  LOG_ERR,
  LOG_WARNING,
  LOG_ERR,
  LOG_ERR,
  LOG_CRIT,
  LOG_CRIT
};
#endif

static char *class_names[] = {
  "???",
  "DBG",
  "TRACE",
  "INFO",
  "RMT",
  "WARN",
  "ERR",
  "AUTH",
  "FATAL",
  "BUG"
};

static void
vlog(int class, char *msg, va_list args)
{
  char buf[1024];
  struct log_config *l;

  if (bvsnprintf(buf, sizeof(buf)-1, msg, args) < 0)
    bsprintf(buf + sizeof(buf) - 100, " ... <too long>");

  WALK_LIST(l, *current_log_list)
    {
      if (!(l->mask & (1 << class)))
	continue;
      if (l->fh)
	{
	  time_t now = time(NULL);
	  struct tm *tm = localtime(&now);

	  if (l->terminal_flag)
	    fputs("bird: ", l->fh);
	  else
	    {
	      fprintf(l->fh, "%02d-%02d-%04d %02d:%02d:%02d <%s> ",
		       tm->tm_mday,
		       tm->tm_mon+1,
		       tm->tm_year+1900,
		       tm->tm_hour,
		       tm->tm_min,
		       tm->tm_sec,
		       class_names[class]);
	    }
	  fputs(buf, l->fh);
	  fputc('\n', l->fh);
	  fflush(l->fh);
	}
#ifdef HAVE_SYSLOG
      else
	syslog(syslog_priorities[class], "%s", buf);
#endif
    }
  cli_echo(class, buf);
}

void
log(char *msg, ...)
{
  int class = 1;
  va_list args;

  va_start(args, msg);
  if (*msg >= 1 && *msg <= 8)
    class = *msg++;
  vlog(class, msg, args);
  va_end(args);
}

void
bug(char *msg, ...)
{
  va_list args;

  va_start(args, msg);
  vlog(L_BUG[0], msg, args);
  abort();
}

void
die(char *msg, ...)
{
  va_list args;

  va_start(args, msg);
  vlog(L_FATAL[0], msg, args);
  exit(1);
}

void
debug(char *msg, ...)
{
  va_list args;
  char buf[1024];

  va_start(args, msg);
  if (dbgf)
    {
      if (bvsnprintf(buf, sizeof(buf), msg, args) < 0)
	bsprintf(buf + sizeof(buf) - 100, " ... <too long>\n");
      fputs(buf, dbgf);
    }
  va_end(args);
}

void
log_init(int debug)
{
  static struct log_config lc_stderr = { mask: ~0, terminal_flag: 1 };

  init_list(&init_log_list);
  current_log_list = &init_log_list;

#ifdef HAVE_SYSLOG
  if (!debug)
    {
      static struct log_config lc_syslog = { mask: ~0 };
      openlog("bird", LOG_CONS | LOG_NDELAY, LOG_DAEMON);
      add_tail(current_log_list, &lc_syslog.n);
      return;
    }
#endif

  lc_stderr.fh = stderr;
  add_tail(current_log_list, &lc_stderr.n);
}

void
log_switch(list *l)
{
  if (EMPTY_LIST(*l))
    current_log_list = &init_log_list;
  else
    current_log_list = l;
}

void
log_init_debug(char *f)
{
  if (dbgf && dbgf != stderr)
    fclose(dbgf);
  if (!f)
    dbgf = NULL;
  else if (!*f)
    dbgf = stderr;
  else if (!(dbgf = fopen(f, "a")))
    log(L_ERR "Error opening debug file `%s': %m", f);
  if (dbgf)
    setvbuf(dbgf, NULL, _IONBF, 0);
}