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