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
|
/* $Id$ */
/***
This file is part of avahi.
avahi is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
avahi is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with avahi; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <pthread.h>
#include <unistd.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <stdarg.h>
#include <syslog.h>
#include "warn.h"
#ifndef COMPAT_LAYER
#define COMPAT_LAYER "Apple Bonjour"
#endif
#ifndef CGI_SUBSYSTEM
#define CGI_SUBSYSTEM "libdns_sd"
#endif
static pthread_mutex_t linkage_mutex = PTHREAD_MUTEX_INITIALIZER;
static int linkage_warning = 0;
#ifdef __linux__
const char *avahi_exe_name(void) {
static char exe_name[1024] = "";
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
/* Yes, I know, this is not portable. But who cares? It's for
* cosmetics only, anyway. */
pthread_mutex_lock(&mutex);
if (exe_name[0] == 0) {
int k;
char fn[64];
snprintf(fn, sizeof(fn), "/proc/%lu/exe", (unsigned long) getpid());
if ((k = readlink(fn, exe_name, sizeof(exe_name)-1)) < 0)
snprintf(exe_name, sizeof(exe_name), "(unknown)");
else {
char *slash;
assert((size_t) k <= sizeof(exe_name)-1);
exe_name[k] = 0;
if ((slash = strrchr(exe_name, '/')))
memmove(exe_name, slash+1, strlen(slash)+1);
}
}
pthread_mutex_unlock(&mutex);
return exe_name;
}
#else
#ifdef __GNUC__
#warning "avahi_exe_name() needs to be implemented for your operating system"
#endif
const char *avahi_exe_name(void) {
return "(unknown)";
}
#endif
void avahi_warn(const char *fmt, ...) {
char msg[512] = "*** WARNING *** ";
va_list ap;
size_t n;
assert(fmt);
va_start(ap, fmt);
n = strlen(msg);
vsnprintf(msg + n, sizeof(msg) - n, fmt, ap);
va_end(ap);
fprintf(stderr, "%s\n", msg);
openlog(avahi_exe_name(), LOG_PID, LOG_USER);
syslog(LOG_WARNING, "%s", msg);
closelog();
}
void avahi_warn_linkage(void) {
int w;
pthread_mutex_lock(&linkage_mutex);
w = linkage_warning;
linkage_warning = 1;
pthread_mutex_unlock(&linkage_mutex);
if (!w && !getenv("AVAHI_COMPAT_NOWARN")) {
avahi_warn("The programme '%s' uses the "COMPAT_LAYER" compatiblity layer of Avahi.", avahi_exe_name());
avahi_warn("Please fix your application to use the native API of Avahi!");
avahi_warn("For more information see <http://0pointer.de/avahi-compat?s="CGI_SUBSYSTEM"&e=%s>", avahi_exe_name());
}
}
void avahi_warn_unsupported(const char *function) {
avahi_warn("The programme '%s' called '%s()' which is not supported (or only supported partially) in the "COMPAT_LAYER" compatiblity layer of Avahi.", avahi_exe_name(), function);
avahi_warn("Please fix your application to use the native API of Avahi!");
avahi_warn("For more information see <http://0pointer.de/avahi-compat?s="CGI_SUBSYSTEM"&e=%s&f=%s>", avahi_exe_name(), function);
}
|