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author | Paul Eggert <eggert@cs.ucla.edu> | 2018-12-27 12:52:45 -0800 |
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committer | Paul Eggert <eggert@cs.ucla.edu> | 2018-12-27 12:53:54 -0800 |
commit | c9fdd1b4965ebd02aa408f878320c4955f5e2cc7 (patch) | |
tree | 377aa59b8ff670a6fb3b08a63b88235961f413ac /doc/lispref/processes.texi | |
parent | 9578c2aa2201642e6846b0d09c14e72bc3225d09 (diff) | |
download | emacs-c9fdd1b4965ebd02aa408f878320c4955f5e2cc7.tar.gz |
Improve accept-process-process doc
* doc/lispref/processes.texi (Accepting Output):
* src/process.c (Faccept_process_output):
Document that (accept-process-output P) can return non-nil
even after P has exited, and that it can return nil even if P
is still running (Bug#33839).
Diffstat (limited to 'doc/lispref/processes.texi')
-rw-r--r-- | doc/lispref/processes.texi | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/doc/lispref/processes.texi b/doc/lispref/processes.texi index 623be09cc63..2aca7f82a1a 100644 --- a/doc/lispref/processes.texi +++ b/doc/lispref/processes.texi @@ -1795,7 +1795,8 @@ until output arrives from a process. This function allows Emacs to read pending output from processes. The output is given to their filter functions. If @var{process} is non-@code{nil} then this function does not return until some output -has been received from @var{process}. +has been received from @var{process} or @var{process} has closed the +connection. The arguments @var{seconds} and @var{millisec} let you specify timeout periods. The former specifies a period measured in seconds and the @@ -1820,7 +1821,9 @@ speech synthesis. The function @code{accept-process-output} returns non-@code{nil} if it got output from @var{process}, or from any process if @var{process} is -@code{nil}. It returns @code{nil} if the timeout expired before output +@code{nil}; this can occur even after a process has exited if the +corresponding connection contains buffered data. The function returns +@code{nil} if the timeout expired or the connection was closed before output arrived. @end defun |