Method: PTY.spawn

Defined in:

pty.c

.spawn(command_line) {|r, w, pid| ... } ⇒ Object .spawn(command_line) ⇒ Array .spawn(command, arguments, ...) {|r, w, pid| ... } ⇒ Object .spawn(command, arguments, ...) ⇒ Array

Spawns the specified command on a newly allocated pty. You can also use the alias ::getpty.

The command’s controlling tty is set to the slave device of the pty and its standard input/output/error is redirected to the slave device.

command and command_line are the full commands to run, given a String. Any additional arguments will be passed to the command.

Return values

In the non-block form this returns an array of size three, [r, w, pid].

In the block form these same values will be yielded to the block:

r

A readable IO that contains the command’s standard output and standard error

w

A writable IO that is the command’s standard input

pid

The process identifier for the command.

Overloads:

• .spawn(command_line) {|r, w, pid| ... } ⇒ Object

  Yields:

  • (r, w, pid)
• .spawn(command_line) ⇒ Array

  Returns:

  • (Array)
• .spawn(command, arguments, ...) {|r, w, pid| ... } ⇒ Object

  Yields:

  • (r, w, pid)
• .spawn(command, arguments, ...) ⇒ Array

  Returns:

  • (Array)

# File 'pty.c', line 575

static VALUE
pty_getpty(int argc, VALUE *argv, VALUE self)
{
    VALUE res;
    struct pty_info info;
    rb_io_t *wfptr,*rfptr;
    VALUE rport = rb_obj_alloc(rb_cFile);
    VALUE wport = rb_obj_alloc(rb_cFile);
    char SlaveName[DEVICELEN];

    MakeOpenFile(rport, rfptr);
    MakeOpenFile(wport, wfptr);

    establishShell(argc, argv, &info, SlaveName);

    rfptr->mode = rb_io_modestr_fmode("r");
    rfptr->fd = info.fd;
    rfptr->pathv = rb_obj_freeze(rb_str_new_cstr(SlaveName));

    wfptr->mode = rb_io_modestr_fmode("w") | FMODE_SYNC;
    wfptr->fd = rb_cloexec_dup(info.fd);
    if (wfptr->fd == -1)
        rb_sys_fail("dup()");
    rb_update_max_fd(wfptr->fd);
    wfptr->pathv = rfptr->pathv;

    res = rb_ary_new2(3);
    rb_ary_store(res,0,(VALUE)rport);
    rb_ary_store(res,1,(VALUE)wport);
    rb_ary_store(res,2,PIDT2NUM(info.child_pid));

    if (rb_block_given_p()) {
	rb_ensure(rb_yield, res, pty_detach_process, (VALUE)&info);
	return Qnil;
    }
    return res;
}