freopen: Documentation.

[gnulib.git] / doc / posix-functions / freopen.texi

diff --git a/doc/posix-functions/freopen.texi b/doc/posix-functions/freopen.texi
index ccb25ea..49b0afe 100644 (file)
--- a/doc/posix-functions/freopen.texi
+++ b/doc/posix-functions/freopen.texi
@@ -2,13 +2,16 @@
 @section @code{freopen}
 @findex freopen
 
-POSIX specification: @url{http://www.opengroup.org/susv3xsh/freopen.html}
+POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/freopen.html}
 
 Gnulib module: freopen
 
 Portability problems fixed by Gnulib:
 @itemize
 @item
+On platforms where @code{off_t} is a 32-bit type, @code{freopen} may not work
+correctly with files larger than 2 GB.  (Cf. @code{AC_SYS_LARGEFILE}.)
+@item
 On Windows platforms (excluding Cygwin), this function does usually not
 recognize the @file{/dev/null} filename.
 @end itemize
@@ -18,4 +21,18 @@ Portability problems not fixed by Gnulib:
 @item
 On Windows platforms (excluding Cygwin), this function does not set @code{errno}
 upon failure.
+@item
+This function does not support a @code{NULL} file name argument on some
+platforms:
+OpenBSD 4.9, AIX 7.1, HP-UX 11.23, IRIX 6.5, OSF/1 5.1, Solaris 10, mingw.
+@item
+This function does not fail when the file name argument ends in a slash
+and (without the slash) names a nonexistent file or a file that is not a
+directory, on some platforms:
+HP-UX 11.00, Solaris 9, Irix 5.3.
+@item
+Applications should not assume that @code{fileno(f)} will be the same
+before and after a call to @code{freopen(name,mode,f)}.  However, the
+module freopen-safer can at least protect @code{stdin}, @code{stdout},
+and @code{stderr}.
 @end itemize