POSIX Process Management API

fork()

Clone the current process 

pthread_atfork()

Register atfork() handlers

exec*()

Execute a new image inside a process 

posix_spawn()

Create a new process executing a new image 

wait()

Wait for termination of a process 

waitpid()

Wait for termination of a process 

_exit()

Terminate the current process 

getpid()

Get process identifier 

getppid()

Get parent process identifier  

getpgid()

Get process group identifier 

setpgid()

Set process group identifier 

getuid()

Get real user identifier 

geteuid()

Get effective user identifier 

getgid()

Get user's real group identifier 

getegid()

Get user's effective group identifier 

getgroups()

Get additional group identifiers 

setuid()

Set real user identifier  

setgid()

Set real group identifier 

seteuid()

Set effective user identifier 

setegid()

Set effective group identifier 

ptrace()

Tracing and debugging a process