1 /*
2 * ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3 *
4 * Copyright (c) 1997-2021 ircd-hybrid development team
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
19 * USA
20 */
21
22 /*! \file log.c
23 * \brief Logger functions.
24 * \version $Id: log.c 9858 2021-01-01 04:43:42Z michael $
25 */
26
27 #include "stdinc.h"
28 #include "log.h"
29 #include "conf.h"
30 #include "misc.h"
31 #include "memory.h"
32
33
34 static struct LogFile log_type_table[LOG_TYPE_LAST];
35
36
37 void
log_set_file(enum log_type type,size_t size,const char * path)38 log_set_file(enum log_type type, size_t size, const char *path)
39 {
40 struct LogFile *log = &log_type_table[type];
41
42 if (log->path)
43 xfree(log->path);
44
45 log->path = xstrdup(path);
46 log->size = size;
47
48 if (type == LOG_TYPE_IRCD)
49 log->file = fopen(log->path, "a");
50 }
51
52 void
log_free(struct LogFile * log)53 log_free(struct LogFile *log)
54 {
55 xfree(log->path);
56 log->path = NULL;
57 }
58
59 void
log_reopen(struct LogFile * log)60 log_reopen(struct LogFile *log)
61 {
62 if (log->file)
63 {
64 fclose(log->file);
65 log->file = NULL;
66 }
67
68 if (log->path)
69 log->file = fopen(log->path, "a");
70 }
71
72 void
log_iterate(void (* func)(struct LogFile *))73 log_iterate(void (*func)(struct LogFile *))
74 {
75 /* type = 1 to skip LOG_TYPE_IRCD */
76 for (unsigned int type = 1; type < LOG_TYPE_LAST; ++type)
77 func(&log_type_table[type]);
78 }
79
80 static bool
log_exceed_size(struct LogFile * log)81 log_exceed_size(struct LogFile *log)
82 {
83 struct stat sb;
84
85 if (log->size == 0)
86 return false;
87
88 if (stat(log->path, &sb) < 0)
89 return false;
90
91 return (size_t)sb.st_size > log->size;
92 }
93
94 static void
log_write(struct LogFile * log,const char * message)95 log_write(struct LogFile *log, const char *message)
96 {
97 fprintf(log->file, "[%s] %s\n", date_iso8601(0), message);
98 fflush(log->file);
99 }
100
101 void
ilog(enum log_type type,const char * fmt,...)102 ilog(enum log_type type, const char *fmt, ...)
103 {
104 struct LogFile *log = &log_type_table[type];
105 char buf[LOG_BUFSIZE] = "";
106 va_list args;
107
108 if (log->file == NULL || ConfigLog.use_logging == 0)
109 return;
110
111 va_start(args, fmt);
112 vsnprintf(buf, sizeof(buf), fmt, args);
113 va_end(args);
114
115 log_write(log, buf);
116
117 if (log_exceed_size(log) == false)
118 return;
119
120 snprintf(buf, sizeof(buf), "Rotating logfile %s", log->path);
121 log_write(log, buf);
122
123 fclose(log->file);
124 log->file = NULL;
125
126 snprintf(buf, sizeof(buf), "%s.old", log->path);
127 unlink(buf);
128 rename(log->path, buf);
129
130 log->file = fopen(log->path, "a");
131 }
132