460b9539 |
1 | /* |
2 | * This file is part of DisOrder. |
3 | * Copyright (C) 2004, 2005, 2006 Richard Kettlewell |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License as published by |
7 | * the Free Software Foundation; either version 2 of the License, or |
8 | * (at your option) any later version. |
9 | * |
10 | * This program is distributed in the hope that it will be useful, but |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | * General Public License for more details. |
14 | * |
15 | * You should have received a copy of the GNU General Public License |
16 | * along with this program; if not, write to the Free Software |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
18 | * USA |
19 | */ |
20 | |
21 | #define NO_MEMORY_ALLOCATION |
22 | /* because the memory allocation functions report errors */ |
23 | |
24 | #include <config.h> |
25 | |
26 | #include <stdio.h> |
27 | #include <stdlib.h> |
28 | #include <string.h> |
29 | #include <errno.h> |
30 | #include <syslog.h> |
31 | #include <sys/time.h> |
32 | |
33 | #include "log.h" |
34 | #include "disorder.h" |
35 | #include "printf.h" |
36 | |
37 | struct log_output { |
38 | void (*fn)(int pri, const char *msg, void *user); |
39 | void *user; |
40 | }; |
41 | |
42 | void (*exitfn)(int) attribute((noreturn)) = exit; |
43 | int debugging; |
44 | const char *progname; |
45 | const char *debug_filename; |
46 | int debug_lineno; |
47 | struct log_output *log_default = &log_stderr; |
48 | |
49 | static const char *debug_only; |
50 | |
51 | /* we might be receiving things in any old encoding, or binary rubbish in no |
52 | * encoding at all, so escape anything we don't like the look of */ |
53 | static void format(char buffer[], size_t bufsize, const char *fmt, va_list ap) { |
54 | char t[1024]; |
55 | const char *p; |
56 | int ch; |
57 | size_t n = 0; |
58 | |
59 | if(byte_vsnprintf(t, sizeof t, fmt, ap) < 0) |
60 | strcpy(t, "[byte_vsnprintf failed]"); |
61 | p = t; |
62 | while((ch = (unsigned char)*p++)) { |
63 | if(ch >= ' ' && ch <= 126) { |
64 | if(n < bufsize) buffer[n++] = ch; |
65 | } else { |
66 | if(n < bufsize) buffer[n++] = '\\'; |
67 | if(n < bufsize) buffer[n++] = '0' + ((ch >> 6) & 7); |
68 | if(n < bufsize) buffer[n++] = '0' + ((ch >> 3) & 7); |
69 | if(n < bufsize) buffer[n++] = '0' + ((ch >> 0) & 7); |
70 | } |
71 | } |
72 | if(n >= bufsize) |
73 | n = bufsize - 1; |
74 | buffer[n] = 0; |
75 | } |
76 | |
77 | /* log to a file */ |
78 | static void logfp(int pri, const char *msg, void *user) { |
79 | struct timeval tv; |
80 | FILE *fp = user ? user : stderr; |
81 | /* ...because stderr is not a constant so we can't initialize log_stderr |
82 | * sanely */ |
83 | const char *p; |
84 | |
85 | if(progname) |
86 | fprintf(fp, "%s: ", progname); |
87 | if(pri <= LOG_ERR) |
88 | fputs("ERROR: ", fp); |
89 | else if(pri < LOG_DEBUG) |
90 | fputs("INFO: ", fp); |
91 | else { |
92 | if(!debug_only) { |
93 | if(!(debug_only = getenv("DISORDER_DEBUG_ONLY"))) |
94 | debug_only = ""; |
95 | } |
96 | gettimeofday(&tv, 0); |
97 | p = debug_filename; |
98 | while(!strncmp(p, "../", 3)) p += 3; |
99 | if(*debug_only && strcmp(p, debug_only)) |
100 | return; |
101 | fprintf(fp, "%llu.%06lu: %s:%d: ", |
102 | (unsigned long long)tv.tv_sec, (unsigned long)tv.tv_usec, |
103 | p, debug_lineno); |
104 | } |
105 | fputs(msg, fp); |
106 | fputc('\n', fp); |
107 | } |
108 | |
109 | /* log to syslog */ |
110 | static void logsyslog(int pri, const char *msg, |
111 | void attribute((unused)) *user) { |
112 | if(pri < LOG_DEBUG) |
113 | syslog(pri, "%s", msg); |
114 | else |
115 | syslog(pri, "%s:%d: %s", debug_filename, debug_lineno, msg); |
116 | } |
117 | |
118 | struct log_output log_stderr = { logfp, 0 }; |
119 | struct log_output log_syslog = { logsyslog, 0 }; |
120 | |
121 | /* log to all log outputs */ |
122 | static void vlogger(int pri, const char *fmt, va_list ap) { |
123 | char buffer[1024]; |
124 | |
125 | format(buffer, sizeof buffer, fmt, ap); |
126 | log_default->fn(pri, buffer, log_default->user); |
127 | } |
128 | |
129 | /* wrapper for vlogger */ |
130 | static void logger(int pri, const char *fmt, ...) { |
131 | va_list ap; |
132 | |
133 | va_start(ap, fmt); |
134 | vlogger(pri, fmt, ap); |
135 | va_end(ap); |
136 | } |
137 | |
138 | /* internals of fatal/error/info */ |
139 | void elog(int pri, int errno_value, const char *fmt, va_list ap) { |
140 | char buffer[1024]; |
141 | |
142 | if(errno_value == 0) |
143 | vlogger(pri, fmt, ap); |
144 | else { |
145 | memset(buffer, 0, sizeof buffer); |
146 | byte_vsnprintf(buffer, sizeof buffer, fmt, ap); |
147 | buffer[sizeof buffer - 1] = 0; |
148 | logger(pri, "%s: %s", buffer, strerror(errno_value)); |
149 | } |
150 | } |
151 | |
152 | #define disorder_fatal fatal |
153 | #define disorder_error error |
154 | #define disorder_info info |
155 | |
156 | /* shared implementation of vararg functions */ |
157 | #include "log-impl.h" |
158 | |
159 | void debug(const char *msg, ...) { |
160 | va_list ap; |
161 | |
162 | va_start(ap, msg); |
163 | vlogger(LOG_DEBUG, msg, ap); |
164 | va_end(ap); |
165 | } |
166 | |
167 | void set_progname(char **argv) { |
168 | if((progname = strrchr(argv[0], '/'))) |
169 | ++progname; |
170 | else |
171 | progname = argv[0]; |
172 | } |
173 | |
174 | /* |
175 | Local Variables: |
176 | c-basic-offset:2 |
177 | comment-column:40 |
178 | End: |
179 | */ |