Redline/source/GetPID.h
maride 02061d74c2 Original 1.0.5 code
(as received from Jonas Echterhoff)
2016-04-02 14:43:55 +02:00

169 lines
8.4 KiB
C
Executable File

/*
File: GetPID.h
Description: This file defines a simple API to do process PID lookup based on process name.
Author: Chad Jones
Copyright: © Copyright 2003 Apple Computer, Inc. All rights reserved.
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Change History (most recent first):
*/
#if !defined(__DTSSampleCode_GetPID__)
#define __DTSSampleCode_GetPID__ 1
#include <stdlib.h>
#include <stdio.h>
#if defined(__cplusplus)
extern "C" {
#endif
// --- Defining constants for use with sample code --- //
enum {kSuccess = 0,
kCouldNotFindRequestedProcess = -1,
kInvalidArgumentsError = -2,
kErrorGettingSizeOfBufferRequired = -3,
kUnableToAllocateMemoryForBuffer = -4,
kPIDBufferOverrunError = -5};
/*****************************************************
* GetAllPIDsForProcessName
*****************************************************
* Purpose: This functions purpose is to lookup a BSD
* process PID given the BSD process name. This function may
* potentially return multiple PIDs for a given BSD process name
* since several processes can have the same BSD process name.
*
* Parameters:
* ProcessName A constant C-string. On calling
* GetAllPIDsForProcessName this variable holds the BSD process name
* used to do the process lookup. Note that the process name you need
* to pass is the name of the BSD executable process. If trying
* to find the PID of an regular OSX application you will need to pass the
* name of the actual BSD executable inside an application bundle (rather
* than the bundle name itself). In any case as a user you can find the
* BSD process name of any process (including OSX applications) by
* typing the command "ps -axcocommand,pid" in terminal.
*
* ArrayOfReturnedPIDs A pointer to a pre-allocated array of pid_t.
* On calling GetAllPIDsForProcessName this variable must be a pointer to a
* pre-allocated array of pid_t whos length (in number of pid_t entries) is defined
* in ArrayOfPIDsLength. On successful return from GetAllPIDsForProcessName
* this array will hold the PIDs of all processes which have a matching process
* name to that specified in the ProcessName input variable. The number of actual
* PIDs entered in the array starting at index zero will be the value returned
* in NumberOfMatchesFound. On failed return if the error is a buffer overflow
* error then the buffer will be filled to the max with PIDs which matched.
* Otherwise on failed return the state of the array will be undefined.
*
* NumberOfPossiblePIDsInArray A unsigned integer. On calling
* GetAllPIDsForProcessName this variable will hold the number of
* pre-allocated PID entries which are in the ArrayOfReturnedPIDs for this functions
* use. Note this value must have a value greater than zero.
*
* NumberOfMatchesFound An unsigned integer. On calling GetAllPIDsForProcessName
* this variable will point to a pre-allocated unsigned integer. On return from
* GetAllPIDsForProcessName this variable will contain the number of PIDs contained in the
* ArrayOfReturnedPIDs. On failed return the value of the variable will be undefined.
*
* SysctlError A pointer to a pre-allocated integer. On failed return, this
* variable represents the error returned from the sysctl command. On function
* success this variable will have a value specified by the sysctl based on the
* error that occurred. On success the variable will have the value zero.
* Note this variable can also be NULL in which case the variable is ignored.
*
* *Function Result* A integer return value.
* See result codes listed below.
* Result Codes:
* 0 Success. A set of process PIDs were found and are located in
* ArrayOfReturnedPIDs array.
* -1 Could not find a process with a matching process name
* (i.e. process not found).
* -2 Invalid arguments passed.
* -3 Unable to get the size of sysctl buffer required
* (consult SysctlError return value for more information)
* -4 Unable to allocate memory to store BSD process information
* (consult SysctlError return value for more information)
* -5 The array passed to hold the returned PIDs is not large enough
* to hold all PIDs of process with matching names.
*
*****************************************************/
int GetAllPIDsForProcessName(const char* ProcessName,
pid_t ArrayOfReturnedPIDs[],
const unsigned int NumberOfPossiblePIDsInArray,
unsigned int* NumberOfMatchesFound,
int* SysctlError); //Can be NULL
/*****************************************************
* GetPIDForProcessName
*****************************************************
* Purpose: A convience call for GetAllPIDsForProcessName().
* This function looks up a process PID given a BSD process
* name.
*
* Parameters:
* ProcessName A constant C-string. On calling
* GetPIDForProcessName this variable holds the BSD process name
* used to do the process lookup. Note that the process name you need
* to pass is the name of the BSD executable process. If trying
* to find the PID of an regular OSX application you will need to pass the
* name of the actual BSD executable inside an application bundle (rather
* than the bundle name itself). In any case as a user you can find the
* BSD process name of any process (including OSX applications) by
* typing the command "ps -axcocommand,pid" in terminal.
*
* *Function Result* A integer return value.
* See result codes listed below.
* Result Codes:
* >=0 Success. The value returned is the PID of the
* requested process.
* -1 Error getting PID for requested process. This error can
* be caused by several things. One is if no such process exists.
* Another is if more than one process has the given name. The
* Answer is to call GetAllPIDsForProcessName()
* for complete error code or to get PIDs if there are multiple
* processes with that name.
*****************************************************/
int GetPIDForProcessName(const char* ProcessName);
#if defined(__cplusplus)
}
#endif
#endif