loggong

git-svn-id: svn://elaine/murooma/trunk@190 d8a302eb-03bc-478d-80e4-98257eca68ef

common/log.cpp

@@ -0,0 +1,35 @@
+#include "log.h"
+
+Log::Log(std::string ident, int facility) {
+    facility_ = facility;
+    priority_ = LOG_DEBUG;
+    strncpy(ident_, ident.c_str(), sizeof(ident_));
+    ident_[sizeof(ident_)-1] = '\0';
+
+    openlog(ident_, LOG_PID, facility_);
+}
+
+int Log::sync() {
+    if (buffer_.length()) {
+        syslog(priority_, buffer_.c_str());
+        buffer_.erase();
+        priority_ = LOG_DEBUG; // default to debug for each message
+    }
+    return 0;
+}
+
+int Log::overflow(int c) {
+    if (c != EOF) {
+        buffer_ += static_cast<char>(c);
+    } else {
+        sync();
+    }
+    return c;
+}
+
+std::ostream& operator<< (std::ostream& os, const LogPriority& log_priority) {
+    static_cast<Log *>(os.rdbuf())->priority_ = (int)log_priority;
+    return os;
+}
+
+

common/log.h

@@ -0,0 +1,41 @@
+#ifndef LOG_H
+#define LOG_H
+
+#include <syslog.h>
+#include <iostream>
+#include <cstring>
+
+
+enum LogPriority {
+    kLogEmerg   = LOG_EMERG,   // system is unusable
+    kLogAlert   = LOG_ALERT,   // action must be taken immediately
+    kLogCrit    = LOG_CRIT,    // critical conditions
+    kLogErr     = LOG_ERR,     // error conditions
+    kLogWarning = LOG_WARNING, // warning conditions
+    kLogNotice  = LOG_NOTICE,  // normal, but significant, condition
+    kLogInfo    = LOG_INFO,    // informational message
+    kLogDebug   = LOG_DEBUG    // debug-level message
+};
+
+std::ostream& operator<< (std::ostream& os, const LogPriority& log_priority);
+
+class Log : public std::basic_streambuf<char, std::char_traits<char> > {
+public:
+    explicit Log(std::string ident, int facility);
+
+protected:
+    int sync();
+    int overflow(int c);
+
+private:
+    friend std::ostream& operator<< (std::ostream& os, const LogPriority& log_priority);
+    std::string buffer_;
+    int facility_;
+    int priority_;
+    char ident_[50];
+};
+
+
+#endif
+
+

common/utils.h

@@ -47,6 +47,48 @@ std::vector<std::string> split(const std::string& str)
 }
 
 
+static void daemonize()
+{
+	/* Our process ID and Session ID */
+	pid_t pid, sid;
+
+	/* Fork off the parent process */
+	pid = fork();
+	if (pid < 0) 
+	    exit(EXIT_FAILURE);
+
+	/* If we got a good PID, then
+	   we can exit the parent process. */
+	if (pid > 0) 
+	    exit(EXIT_SUCCESS);
+
+	/* Change the file mode mask */
+	umask(0);
+		    
+	/* Open any logs here */        
+		    
+	/* Create a new SID for the child process */
+	sid = setsid();
+	if (sid < 0) 
+	{
+		/* Log the failure */
+		exit(EXIT_FAILURE);
+	}
+
+	/* Change the current working directory */
+	if ((chdir("/")) < 0) 
+	{
+		/* Log the failure */
+		exit(EXIT_FAILURE);
+	}
+
+	/* Close out the standard file descriptors */
+	close(STDIN_FILENO);
+	close(STDOUT_FILENO);
+	close(STDERR_FILENO);
+}
+
+
 
 
 #endif