From: greg@kroah.com <greg@kroah.com>
Date: Mon, 2 Feb 2004 16:19:41 +0000 (-0800)
Subject: [PATCH] rework the logging code so that each program logs with the proper name in... 
X-Git-Tag: 016~10
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=95a6f4c8acafe7031087667aa556a50a6a091c93

[PATCH] rework the logging code so that each program logs with the proper name in the syslog.
---

diff --git a/Makefile b/Makefile
index 05d5da5a3..386583b7e 100644
--- a/Makefile
+++ b/Makefile
@@ -195,7 +195,6 @@ OBJS =	udev_config.o	\
 	udev-add.o	\
 	udev-remove.o	\
 	udevdb.o	\
-	logging.o	\
 	namedev.o	\
 	namedev_parse.o	\
 	$(SYSFS)	\
@@ -254,15 +253,15 @@ $(ROOT): udev.o $(OBJS) $(HEADERS) $(GEN_HEADERS)
 	$(STRIPCMD) $@
 
 $(HELPER): udevinfo.o $(OBJS) $(HEADERS)
-	$(LD) $(LDFLAGS) -o $@ $(CRT0) udevinfo.o logging.o udev_config.o udevdb.o $(SYSFS) $(TDB) $(LIB_OBJS) $(ARCH_LIB_OBJS)
+	$(LD) $(LDFLAGS) -o $@ $(CRT0) udevinfo.o udev_config.o udevdb.o $(SYSFS) $(TDB) $(LIB_OBJS) $(ARCH_LIB_OBJS)
 	$(STRIPCMD) $@
 
-$(DAEMON): udevd.h udevd.o udevd.o logging.o
-	$(LD) $(LDFLAGS) -lpthread -o $@ $(CRT0) udevd.o logging.o $(LIB_OBJS) $(ARCH_LIB_OBJS)
+$(DAEMON): udevd.h udevd.o
+	$(LD) $(LDFLAGS) -lpthread -o $@ $(CRT0) udevd.o $(LIB_OBJS) $(ARCH_LIB_OBJS)
 	$(STRIPCMD) $@
 
-$(SENDER): udevd.h udevsend.o udevd.o logging.o
-	$(LD) $(LDFLAGS) -o $@ $(CRT0) udevsend.o logging.o $(LIB_OBJS) $(ARCH_LIB_OBJS)
+$(SENDER): udevd.h udevsend.o
+	$(LD) $(LDFLAGS) -o $@ $(CRT0) udevsend.o $(LIB_OBJS) $(ARCH_LIB_OBJS)
 	$(STRIPCMD) $@
 
 clean:
diff --git a/libsysfs/sysfs.h b/libsysfs/sysfs.h
index 4ea491935..49c9285bc 100644
--- a/libsysfs/sysfs.h
+++ b/libsysfs/sysfs.h
@@ -34,7 +34,7 @@
 
 /* Debugging */
 #ifdef DEBUG
-#include <syslog.h>
+#include "../logging.h" 
 #define dprintf(format, arg...)								\
 	do {										\
 		log_message (LOG_DEBUG , "%s: " format , __FUNCTION__ , ## arg);	\
@@ -43,8 +43,4 @@
 #define dprintf(format, arg...) do { } while (0)
 #endif
 
-extern int log_message (int level, const char *format, ...)
-	__attribute__ ((format (printf, 2, 3)));
-
-
 #endif /* _SYSFS_H_ */
diff --git a/logging.h b/logging.h
index df5922b3e..e233ddc88 100644
--- a/logging.h
+++ b/logging.h
@@ -1,9 +1,9 @@
 /*
  * logging.h
  *
- * Userspace devfs
+ * Simple logging functions that can be compiled away into nothing.
  *
- * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
+ * Copyright (C) 2003,2004 Greg Kroah-Hartman <greg@kroah.com>
  * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
  *
  *	This program is free software; you can redistribute it and/or modify it
@@ -29,6 +29,7 @@
 #define dbg_parse(format, arg...)	do { } while (0)
 
 #ifdef LOG
+#include <stdarg.h>
 #include <syslog.h>
 
 #undef info
@@ -54,9 +55,26 @@
 	} while (0)
 #endif
 
-#endif	/* LOG */
-
-extern int log_message (int level, const char *format, ...)
+static void log_message (int level, const char *format, ...)
 	__attribute__ ((format (printf, 2, 3)));
+static inline void log_message (int level, const char *format, ...)
+{
+	va_list	args;
+
+	va_start(args, format);
+	vsyslog(level, format, args);
+	va_end(args);
+}
+
+/* each program must declare this variable somewhere */
+extern unsigned char logname[42];
+
+static inline void init_logging(char *program_name)
+{
+	snprintf(logname, 42,"%s[%d]", program_name, getpid());
+	openlog(logname, 0, LOG_DAEMON);
+}
+
+#endif	/* LOG */
 
 #endif
diff --git a/udev.c b/udev.c
index 38b26916c..b45fb336b 100644
--- a/udev.c
+++ b/udev.c
@@ -38,6 +38,7 @@
 /* global variables */
 char **main_argv;
 char **main_envp;
+unsigned char logname[42];
 
 static void sig_handler(int signum)
 {
@@ -174,6 +175,7 @@ int main(int argc, char **argv, char **envp)
 	main_argv = argv;
 	main_envp = envp;
 
+	init_logging("udev");
 	dbg("version %s", UDEV_VERSION);
 
 	return udev_hotplug(argc, argv);
diff --git a/udevd.c b/udevd.c
index dc7d581c2..331b7e4b8 100644
--- a/udevd.c
+++ b/udevd.c
@@ -42,6 +42,7 @@
 #include "logging.h"
 
 
+unsigned char logname[42];
 static pthread_mutex_t  msg_lock;
 static pthread_mutex_t  msg_active_lock;
 static pthread_cond_t msg_active;
@@ -354,6 +355,8 @@ int main(int argc, char *argv[])
 	pthread_t mgr_exec_tid;
 	int retval;
 
+	init_logging("udevd");
+
 	/* only let one version of the daemon run at any one time */
 	if (one_and_only() != 0)
 		exit(0);
diff --git a/udevinfo.c b/udevinfo.c
index 4d28755b2..71a9a6d93 100644
--- a/udevinfo.c
+++ b/udevinfo.c
@@ -38,6 +38,7 @@
 
 char **main_argv;
 int main_argc;
+unsigned char logname[42];
 
 static int print_all_attributes(const char *path)
 {
@@ -412,6 +413,8 @@ int main(int argc, char *argv[], char *envp[])
 	main_argv = argv;
 	main_argc = argc;
 
+	init_logging("udevinfo");
+
 	/* initialize our configuration */
 	udev_init_config();
 
diff --git a/udevsend.c b/udevsend.c
index 0ddc6839d..6af9df770 100644
--- a/udevsend.c
+++ b/udevsend.c
@@ -40,6 +40,7 @@
 #include "udevd.h"
 #include "logging.h"
 
+unsigned char logname[42];
 
 static inline char *get_action(void)
 {
@@ -126,6 +127,8 @@ int main(int argc, char* argv[])
 	int sock;
 	struct sockaddr_un saddr;
 
+	init_logging("udevsend");
+
 	subsystem = argv[1];
 	if (subsystem == NULL) {
 		dbg("no subsystem");