1 .TH GETPID 3
2 .SH NAME
3 getpid, getppid \- get process ids
4 .SH SYNOPSIS
5 .B #include <u.h>
6 .br
7 .B #include <libc.h>
8 .PP
9 .B
10 int getpid(void)
11 .PP
12 .B
13 int getppid(void)
14 .SH DESCRIPTION
15 .I Getpid
16 reads
17 .B /dev/pid
18 (see
19 .IR cons (3))
20 and converts it to get the process id of the current process,
21 a number guaranteed to be unique among all running processes on the machine
22 executing
23 .IR getpid .
24 .PP
25 .I Getppid
26 reads
27 .B /dev/ppid
28 (see
29 .IR cons (3))
30 and converts it to get the id of the parent of the current process.
31 .SH SOURCE
32 .B /sys/src/libc/9sys
33 .SH SEE ALSO
34 .IR intro (3),
35 .IR cons (3),
36 .IR proc (3)
37 .SH DIAGNOSTICS
38 Returns 0 and
39 sets
40 .I errstr
41 if unsuccessful.