NAME

       getpid, getppid — get parent or calling process identification

LIBRARY

       Standard C Library (libc, -lc)

SYNOPSIS

       #include <unistd.h>

       pid_t
       getpid(void);

       pid_t
       getppid(void);

DESCRIPTION

       The  getpid()  system call returns the process ID of the calling process.  Though the ID is guaranteed to
       be unique, it should NOT be used for  constructing  temporary  file  names,  for  security  reasons;  see
       mkstemp(3) instead.

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

ERRORS

       The  getpid()  and  getppid()  system  calls  are  always  successful, and no return value is reserved to
       indicate an error.

SEE ALSO

       fork(2), getpgrp(2), kill(2), setpgid(2), setsid(2), exec(3)

STANDARDS

       The getpid() and getppid() system calls are expected to conform to ISO/IEC 9945-1:1990 (“POSIX.1”).

HISTORY

       The getpid() function appeared in Version 7 AT&T UNIX.

Debian                                          December 15, 2015                                      GETPID(2)