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/*
* Process tracking object.
*
* Copyright (c) 2002 International Business Machines
* Author: Alan Robertson <alanr@unix.sh>
*
* This library 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.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef _PROCTRACK_H
# define _PROCTRACK_H
#include <sys/types.h>
#include <sys/times.h>
#include <clplumbing/longclock.h>
/*
* We track processes, mainly so we can do something appropriate
* when they die, and find processes should we need to kill them...
*/
typedef struct _ProcTrack ProcTrack;
typedef struct _ProcTrack_ops ProcTrack_ops;
typedef struct _ProcTrackKillInfo ProcTrackKillInfo;
/*
* The levels of logging possible for our process
*/
enum _ProcTrackLogType {
PT_LOGNONE = 2, /* Exits never automatically logged */
PT_LOGNORMAL, /* Automatically log abnormal exits */
PT_LOGVERBOSE /* Automatically log every exit */
};
typedef enum _ProcTrackLogType ProcTrackLogType;
#define proctrack_pid(p) (p)->pid
#define proctrack_data(p) (p)->privatedata
#define reset_proctrack_data(p) (p)->privatedata = NULL
#define proctrack_timedout(p) ((p)->timeoutseq > 0)
struct _ProcTrack {
pid_t pid;
int isapgrp;
ProcTrackLogType loglevel;
void * privatedata;
ProcTrack_ops* ops;
longclock_t startticks;
TIME_T starttime;
unsigned timerid;
int timeoutseq;
ProcTrackKillInfo* killinfo;
};
/*
* The set of operations to perform on our tracked processes.
*/
struct _ProcTrack_ops {
/* Called when a process dies */
void (*procdied)
(ProcTrack* p, int status, int signo, int exitcode
, int waslogged);
/* Called when a process registers */
void (*procregistered)
(ProcTrack*p);
/* Returns a "name" for a process (for messages) */
/* (may have to be copied, because it may be a static value) */
const char *
(*proctype)
(ProcTrack* p);
};
struct _ProcTrackKillInfo {
long mstimeout; /* Timeout in milliseconds */
int signalno; /* Signal number to issue @ timeout */
};
/* A function for calling by the process table iterator */
typedef void (*ProcTrackFun) (ProcTrack* p, void * data);
/* Call this function to activate the procdied member function */
/* Returns TRUE if 'pid' was registered */
int ReportProcHasDied(int pid, int status);
/* Create/Log a new tracked process */
void NewTrackedProc(pid_t pid, int isapgrp, ProcTrackLogType loglevel
, void * privatedata , ProcTrack_ops* ops);
/* "info" is 0-terminated (terminated by a 0 signal) */
int SetTrackedProcTimeouts(pid_t pid, ProcTrackKillInfo* info);
void RemoveTrackedProcTimeouts(pid_t pid);
/* Return information associated with the given PID (or NULL) */
ProcTrack* GetProcInfo(pid_t pid);
/*
* Iterate over the set of tracked processes.
* If proctype is NULL, then walk through them all, otherwise only those
* of the given type ("f")
*/
void ForEachProc(ProcTrack_ops* proctype, ProcTrackFun f, void * data);
void DisableProcLogging(void); /* Useful for shutdowns */
void EnableProcLogging(void);
#endif
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