Processes

These system calls control user processes.

Process management functions

fork	create a new process
execl execle execlp	execute a file with a list of arguments
execv execve execvp	execute a file with a variable list
exit _exit	terminate process
wait waitpid waitid	wait for child process to change state
setuid setgid	set user and group IDs
getpgrp setpgrp	get and set process group ID
chdir fchdir	change working directory
chroot	change root directory
nap	suspend current process for a short interval
nice	change priority of a process
getcontext setcontext	get and set current user context
getgroups setgroups	get or set supplementary group IDs
getpid getppid getpgid	get process and parent process IDs
getuid geteuid	get real user and effective user
getgid getegid	get real group and effective group
pause	suspend process until signal
priocntl	process scheduler control
setpgid	set process group ID
setsid	set session ID
kill	send a signal to a process or group of processes