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.

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