getppid()--Get Process ID of Parent Process

Syntax

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

 pid_t getppid(void);

  Service Program Name: QP0WSRV1

  Default Public Authority: *USE

  Threadsafe: Yes

The getppid() function returns the parent process ID of the calling process.

Parameters

None.

Authorities

None..

Return Value

pid_t

The value returned by getppid() is the process ID of the parent process for the calling process. A process ID value of 1 indicates that there is no parent process associated with the calling process.

Error Conditions

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

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)
Qp0wGetPPid()--Get Process ID of Parent Process

Example

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

API introduced: V3R6

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