OS APIs

Table of Contents

atexit - evaluates code before exiting a program.

block_signal, unblock_signal - delimit signal blocking.

errno - detects and numbers errors.

exec - executes a program.

exit_program - terminates the interpreter.

fork - duplicates a process.

getenv - retrieves the value of an environment variable.

gethostname - gets the computer's host name.

getnid - returns the local node number.

getpid - returns the program ID.

getsockopt, setsockopt - get and set a socket option.

kill - sends a signal to a process.

nanosleep - pauses the interpreter for seconds and nanoseconds.

setenv - sets an environment variable for the current process.

shm_open - opens shared memory objects.

shm_unlink - removes shared memory objects.

signal - defines an expression to be evaluated at an OS generated signal.

sleep, usleep - suspend execution.

strerror - retrieves an error message.

system - treats its argument as a system command.

tcp_accept - forks a new TCP socket on the server side to accept a new connection.

tcp_connect - creates a client-side TCP socket connection.

tcp_listen - creates a server-side TCP socket connection.

wait - waits for process exit status.