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getpid

Retrieve the process identification number.

Compatibility:

This function is compatible with the following targets:

ANSI

BeOS

 EMB/RTOS

Mac OS

Palm OS

Win32

Prototype: 
#include <unistd.h>
getpid() Macros:

Macro

Represents
#define getpid()  
 
Process ID  
#define getppid()  
 
Parent process ID  
#define getuid()  
 
Real user ID  
#define geteuid()  
 
Effective user ID  
#define getgid()  
 
Real group ID  
#define getegid()  
 
Effective group ID  
#define getpgrp()  
 
Process group ID  

Parameters:

None

Remarks:

The getpid() function returns the unique number (Process ID) for the calling process. Example of usage is given in "Example of getpid() usage."

Return:

getpid() returns an integer value.

NOTE

These various related getpid() type functions don't really have any meaning on the Mac. The values returned are those that would make sense for a typical user process under UNIX.
Return:

getpid() always returns a value. There is no error returned.

Example of getpid() usage.:
#include <stdio.h>
#include <unistd.h>

int main(void) 
{
  printf("The process ID is %d\n", getpid()); 

	return 0;
}

Result
The process ID is 9000






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Last updated: August 16, 2000