bsd/man/man2/getpid.2

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  34 .\"     @(#)getpid.2    8.1 (Berkeley) 6/4/93
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  36 .Dd June 4, 1993
  37 .Dt GETPID 2
  38 .Os BSD 4
  39 .Sh NAME
  40 .Nm getpid ,
  41 .Nm getppid
  42 .Nd get parent or calling process identification
  43 .Sh SYNOPSIS
  44 .Fd #include <sys/types.h>
  45 .Fd #include <unistd.h>
  46 .Ft pid_t
  47 .Fn getpid void
  48 .Ft pid_t
  49 .Fn getppid void
  50 .Sh DESCRIPTION
  51 .Fn Getpid
  52 returns
  53 the process ID of
  54 the calling process.
  55 The ID is guaranteed to be unique and is
  56 useful for constructing temporary file names.
  57 .Pp
  58 .Fn Getppid
  59 returns the process ID of the parent
  60 of the calling process.
  61 .Sh ERRORS
  62 The
  63 .Fn getpid
  64 and
  65 .Fn getppid
  66 functions are always successful, and no return value is reserved to
  67 indicate an error.
  68 .Sh SEE ALSO
  69 .Xr gethostid 2
  70 .Sh STANDARDS
  71 .Fn Getpid
  72 and
  73 .Fn getppid
  74 conform to
  75 .St -p1003.1-88 .