| .TH GETPID 3 | |
| .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 /usr/local/plan9/src/libc/9sys | |
| .SH SEE ALSO | |
| .IR intro (3), | |
| .IR cons (3), | |
| .IR proc (3) | |
| .SH DIAGNOSTICS | |
| Returns 0 and | |
| sets | |
| .I errstr | |
| if unsuccessful. |