.TH GETPID 2
.SH NAME
getpid, getppid \- get process ids
.SH SYNOPSIS
.B #include <u.h>
.br
.B #include <libc.h>
.PP
.B
int getpid(void)
.PP
.B
int getppid(void)
.SH DESCRIPTION
.I Getpid
reads
.B /dev/pid
(see
.IR cons (3))
and converts it to get the process id of the current process,
a number guaranteed to be unique among all running processes on the machine
executing
.IR getpid .
.PP
.I Getppid
reads
.B /dev/ppid
(see
.IR cons (3))
and converts it to get the id of the parent of the current process.
.SH SOURCE
.B /sys/src/libc/9sys
.SH SEE ALSO
.IR intro (2),
.IR exec (2),
.IR cons (3),
.IR proc (3)
.SH DIAGNOSTICS
Returns 0 and
sets
.I errstr
if unsuccessful.