K

+Key

Prefix class for maintaining unique indexes to +relations, a subclass of +index. Accepts an optional argument for a +Hook attribute. See also Database.

(rel nr (+Need +Key +Number))  # Mandatory, unique Customer/Supplier number

(key ['cnt]) -> sym

Returns the next character from standard input as a single-character transient symbol. The console is set to raw mode. While waiting for a key press, a select system call is executed for all file descriptors and timers in the VAL of the global variable *Run. If cnt is non-NIL, that amount of milliseconds is waited maximally, and NIL is returned upon timeout. See also raw and wait.

: (key)           # Wait for a key
-> "a"            # 'a' pressed

(kill 'pid ['cnt]) -> flg

Sends a signal with the signal number cnt (or SIGTERM if cnt is not given) to the process with the ID pid. Returns T if successful.

: (kill *Pid 20)                                # Stop current process

[2]+  Stopped               pil +               # Unix shell
$ fg                                            # Job control: Foreground
pil +
-> T                                            # 'kill' was successful