man2/getpid.2

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   3 .\" Copyright 1993 Rickard E. Faith (faith@cs.unc.edu)
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  23 .TH GETPID 2 1993-07-23 "Linux 0.99.11" "Linux Programmer's Manual"
  24 .SH NAME
  25 getpid, getppid \- get process identification
  26 .SH SYNOPSIS
  27 .B #include <sys/types.h>
  28 .br
  29 .B #include <unistd.h>
  30 .sp
  31 .B pid_t getpid(void);
  32 .br
  33 .B pid_t getppid(void);
  34 .SH DESCRIPTION
  35 .BR getpid ()
  36 returns the process ID of the current process.  (This is often used by
  37 routines that generate unique temporary filenames.)
  38
  39 .BR getppid ()
  40 returns the process ID of the parent of the current process.
  41 .SH "CONFORMING TO"
  42 POSIX.1-2001, 4.3BSD, SVr4
  43 .SH "SEE ALSO"
  44 .BR fork (2),
  45 .BR kill (2),
  46 .BR exec (3),
  47 .BR mkstemp (3),
  48 .BR tempnam (3),
  49 .BR tmpfile (3),
  50 .BR tmpnam (3)