ref: 6fa3e08412c49a188e2abe7d9ee54cd1f37a85f5
dir: /sys/man/2/getpid/
.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.