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popen: Make more robust on Windows.

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* lib/popen.c: On native Windows, use the _popen based code even if
HAVE_POPEN is set.
* doc/posix-functions/popen.texi: Mention necessity of COMSPEC
environment variable on native Windows.
This commit is contained in:
Bruno Haible
2012-01-31 12:15:46 +01:00
parent 8473e51127
commit ae2b15bacf
3 changed files with 30 additions and 19 deletions
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doc/posix-functions/popen.texi
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@@ -20,6 +20,9 @@ Cygwin 1.5.x.
Portability problems not fixed by Gnulib:
@itemize
@item
On native Windows platforms, this functions terminates the current process
with exit code 127 if the environment variable @code{COMSPEC} is not set.
@item
Some platforms mistakenly set the close-on-exec bit, then if it is
cleared by the application, the platform then leaks file descriptors
from earlier @code{popen} calls into subsequent @code{popen} children: