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Document new behavior of FORK and %FORK.

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sperber 2002-04-10 15:13:21 +00:00
parent 3819d9659e
commit 00ca8ef135
1 changed files with 19 additions and 13 deletions
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doc/scsh-manual/syscalls.tex
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@ -1800,21 +1800,27 @@ without flushing buffered output.
Suspend the current process with a SIGSTOP signal. Suspend the current process with a SIGSTOP signal.
\end{defundesc} \end{defundesc}
\defun {fork} {[thunk]} {proc or \sharpf} \defun {fork} {[thunk or \sharpf] [continue-threads?]} {proc or \sharpf}
\defunx {\%fork} {[thunk]} {proc or \sharpf} \defunx {\%fork} {[thunk or \sharpf] [continue-threads?]} {proc or \sharpf}
\begin{desc} \begin{desc}
\ex{fork} with no arguments is like C \ex{\urlh{http://www.FreeBSD.org/cgi/man.cgi?query=fork&apropos=0&sektion=0&manpath=FreeBSD+4.3-RELEASE&format=html}{fork()}}. \ex{fork} with no arguments or \sharpf{} instead of a thunk is like
In the parent process, it returns the child's \emph{process object} C
(see below for more information on process objects). \ex{\urlh{http://www.FreeBSD.org/cgi/man.cgi?query=fork&apropos=0&sektion=0&manpath=FreeBSD+4.3-RELEASE&format=html}{fork()}}.
In the child process, it returns {\sharpf}. In the parent process, it returns the child's \emph{process object}
(see below for more information on process objects). In the child
process, it returns {\sharpf}.
\ex{fork} with an argument only returns in the parent process, returning \ex{fork} with an argument only returns in the parent process, returning
the child's process object. the child's process object.
The child process calls \var{thunk} and then exits. The child process calls \var{thunk} and then exits.
\ex{fork} flushes buffered output before forking, and sets the child \ex{fork} flushes buffered output before forking, and sets the child
process to non-interactive. \verb|%fork| does not perform this bookkeeping; process to non-interactive. \verb|%fork| does not perform this bookkeeping;
it simply forks. it simply forks.
The optional boolean argument \var{continue-threads?} specifies
whether the currently active threads continue to run in the child or
not. The default is \sharpf.
\end{desc} \end{desc}
\defun {fork/pipe} {[thunk]} {proc or \sharpf} \defun {fork/pipe} {[thunk]} {proc or \sharpf}