-/* $Id$ */
-
/***
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
#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;
-static void get_exe_name(char *t, size_t l) {
- int k;
- char fn[1024];
+const char *avahi_exe_name(void) {
+#ifdef HAVE_GETPROGNAME
+ return getprogname();
+#elif defined(__linux__)
+ 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);
- /* Yes, I know, this is not portable. But who cares? It's
- * for cosmetics only, anyway. */
-
- snprintf(fn, sizeof(fn), "/proc/%lu/exe", (unsigned long) getpid());
+ if (exe_name[0] == 0) {
+ int k;
- if ((k = readlink(fn, t, l-1)) < 0)
- snprintf(t, l, "(unknown)");
- else {
- char *slash;
+ if ((k = readlink("/proc/self/exe", exe_name, sizeof(exe_name)-1)) < 0)
+ snprintf(exe_name, sizeof(exe_name), "(unknown)");
+ else {
+ char *slash;
- assert((size_t) k <= l-1);
- t[k] = 0;
+ assert((size_t) k <= sizeof(exe_name)-1);
+ exe_name[k] = 0;
- if ((slash = strrchr(t, '/')))
- memmove(t, slash+1, strlen(slash)+1);
+ 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
+ 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_BONJOUR_NOWARN")) {
- char exename[256];
- get_exe_name(exename, sizeof(exename));
-
- fprintf(stderr, "*** WARNING: The application '%s' uses the Bonjour compatiblity layer of Avahi. Please fix it to use the native API! ***\n", exename);
+ if (!w && !getenv("AVAHI_COMPAT_NOWARN")) {
+ avahi_warn("The program '%s' uses the "COMPAT_LAYER" compatibility 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) {
- char exename[256];
- get_exe_name(exename, sizeof(exename));
-
- fprintf(stderr, "*** WARNING: The application '%s' called '%s()' which is not supported (or only supported partially) in the Bonjour compatiblity layer of Avahi. Please fix it to use the native API! ***\n", exename, function);
+ avahi_warn("The program '%s' called '%s()' which is not supported (or only supported partially) in the "COMPAT_LAYER" compatibility 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);
}
-
-
-