Re: [PATCH] luaconf.h: call fflush(NULL) before popen()
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- Subject: Re: [PATCH] luaconf.h: call fflush(NULL) before popen()
- From: roberto@... (Roberto Ierusalimschy)
- Date: 2007年8月27日 14:21:59 -0300
> popen(3) manual page says:
>
> Since the standard input of a command opened for reading shares
> its seek offset with the process that called popen(), if the
> original process has done a buffered read, the command's input
> position may not be as expected. Similarly, the output from a
> command opened for writing may become intermingled with that of
> the original process. The latter can be avoided by calling
> fflush(3) before popen().
>
> And at least some scripting languages call something like "fflush(NULL)"
> before spawning (see e.g. "perldoc -f system").
May this have any relationship with that bug reported from the Monotone
project?
http://lua-users.org/lists/lua-l/2007-08/msg00590.html
-- Roberto