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-rw-r--r--ext/pty/README40
1 files changed, 6 insertions, 34 deletions
diff --git a/ext/pty/README b/ext/pty/README
index a09469d..42c7d4f 100644
--- a/ext/pty/README
+++ b/ext/pty/README
@@ -33,43 +33,15 @@ following module fungtions:
the array is passed to the block as block parameters, and the
function itself returns nil.
- While the process spawned by this function is active, SIGCHLD
- is captured to handle the change of the child process. When the
- child process is suspended or finished, an exception is raised.
- As all SIGCHLD signal is captured and processed by PTY module,
- you can't use other function or method which spawns subprosesses
- (including signal() and IO.popen()) while the PTY subprocesses
- are active. Otherwise, unexpected exception will occur. To avoid
- this problem, see protect_signal() below.
-
- If this function is called with an iterator block, SIGCHLD signal
- is captured only within the block. Therefore, it is risky to use
- File objects for PTY subprocess outside the iterator block.
-
+ When the child process is suspended or finished, an exception is
+ raised. If this function is called with an iterator block,
+ exception is raised only within the block. Child process
+ monitor is terminated on block exit.
protect_signal
+ reset_signal
- This function takes an iterator block. Within the iterator block,
- no exception is raised even if any subprocess is terminated.
- This function is used to enable functions like system() or IO.popen()
- while PTY subprocess is active. For example,
-
- PTY.spawn("command_foo") do |r,w|
- ...
- ...
- PTY.protect_signal do
- system "some other commands"
- end
- ...
- end
-
- disables to send exception when "some other commands" is
- terminated.
-
- reset_signal
-
- Disables to handle SIGCHLD while PTY subprocess is active.
-
+ These functions are obsolete in this version of pty.
4. License