getpid()--Get Process ID

 #include <sys/types.h>
 #include <unistd.h>

 pid_t getpid(void);

The getpid() function returns the process ID of the calling process.

Parameters

None.

Authorities

None.

Return Value

Error Conditions

The getpid() function is always successful and does not return an error.

Usage Notes

The getpid() function enables a process for signals if the process is not already enabled for signals. For details, see Qp0sEnableSignals()--Enable Process for Signals.

Related Information

• The <sys/types.h> file (see Header Files for UNIX^®-Type Functions)
  
  
• The <unistd.h> file (see Header Files for UNIX-Type Functions)
  
  
• Qp0sDisableSignals()--Disable Process for Signals
  
  
• Qp0sEnableSignals()--Enable Process for Signals
  
  
• Qp0wGetPid()--Get Process ID
  
  
• Qp0wGetPidNoInit()--Get Process ID without Initializing for Signals

Example

For an example of using this function, see the child program in Example: Using process-related APIs.

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