4.17 Job control

Function: ctermid

Function: ctermid/string

Interface to the C function ctermid(), (libc)ctermid. Return a bytevector or string holding the ASCII coded pathname of the controlling terminal of the current process; the returned value may be the empty bytevector or string.

Function: setsid

Interface to the C function setsid(), (libc)setsid. Create a new session, making the current process the group leader with no controlling terminal. If successful return a fixnum representing the new process group ID, else raise an exception.

Function: getsid pid

Interface to the C function getsid(), (libc)getsid. If successful return a fixnum representing the session ID of the process with process ID pid, which must be a fixnum; else raise an exception.

Function: getpgrp

Interface to the C function getpgrp(), (libc)getpgrp. Return a fixnum representing the process group ID of the calling process.

Function: setpgid pid pgid

Interface to the C function setpgid(), (libc)setpgid. Put the process pid in the process group pgid; both the arguments must be fixnums. If successful return unspecified values, else raise an exception.

Function: tcgetpgrp fd

Interface to the C function tcgetpgrp(), (libc)tcgetpgrp. If successful return a fixnum representing the process group ID of the foreground process group associated with the terminal open on descriptor fd, which must be a fixnum; else raise an exception.

Function: tcsetpgrp fd pgid

Interface to the C function tcsetpgrp(), (libc)tcsetpgrp. Set to process group ID pgid the foreground process group for the terminal open on descriptor fd; both the arguments must be fixnums. If successful return the fixnum zero, else raise an exception.

Function: tcgetsid fd

Interface to the C function tcgetsid(), (libc)tcgetsid. If successful return a fixnum representing the process group ID of the session for which the terminal open on descriptor fd is the controlling terminal; else raise an exception.