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dsDaemon.h

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/* $Id: dsDaemon.h,v 1.9 2004/06/10 10:58:17 dsamersoff Exp $ 
 * 
 */

#ifndef dsDaemon_h
#define dsDaemon_h

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif


#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>

#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif

#include <signal.h>
#include <string.h>
#include <dirent.h>

#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <utime.h>
#include <pwd.h>
#include <time.h>
#include <errno.h>

#ifdef FreeBSD
#include <libutil.h>
#define HAVE_SETPROCTITLE
#endif

#include <dsSmartException.h>

#define DAEMON_NOPARENTSIG 0x01
#define DAEMON_NOCHILDSIG  0x02
#define DAEMON_NODETACH    0x04
#define DAEMON_NOCHDIR     0x08
#define DAEMON_KILLPREV    0x10


typedef void    Sigfunc(int);   /* for signal handlers */

/* Richard Stevens's portable signal function */
Sigfunc * Signal(int signo, Sigfunc *func);

DECLARE_EXCEPTION(dsDaemon);

inline int DaemonFlags(char *str)
{
     int rc = 0;
     if ( strstr(str, "DAEMON_NOPARENTSIG") != 0 ) rc |= DAEMON_NOPARENTSIG;
     if ( strstr(str, "DAEMON_NOCHILDSIG")  != 0 ) rc |= DAEMON_NOCHILDSIG;
     if ( strstr(str, "DAEMON_NODETACH")    != 0 ) rc |= DAEMON_NODETACH;
     if ( strstr(str, "DAEMON_NOCHDIR")     != 0 ) rc |= DAEMON_NOCHDIR;
     if ( strstr(str, "DAEMON_KILLPREV")    != 0 ) rc |= DAEMON_KILLPREV;

     return rc;
}

class dsDaemon
{
    int _max_children;
    char  *_progname;
    char  *_pid_path;
    pid_t *_pchild; 
    int    _flags;

protected:

    void processPidFile();

    void addChild(pid_t npid); 
    void removeChild(pid_t npid);
  
    int waitForFreeSlot(pid_t pid);



     dsDaemon();

public:

  dsDaemon(char *progname, int max_children = 50, int flags = 0);
  dsDaemon(char *progname, char *pid_path, int max_children = 50, int flags = 0);

  virtual ~dsDaemon();

  virtual int   init_globals();

  virtual pid_t fork_child();

   virtual int   child_work();

  virtual void  shutdown_child();

  virtual int   reinit();

  void kill_running(); 

  friend void daemonize(dsDaemon * sd, int options = 0);

 friend void dsSafeSleep(int secs, int nsecs = 0);

  friend  int DaemonFlags(char *str);

  friend void SIGCHLD_hdl(int sig);
  friend void SIGANY_hdl(int sig);
  friend void SIGINT_hdl(int sig);
};



#endif

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