dup2, dup3: work around another cygwin crasher

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

diff --git a/doc/posix-functions/getcwd.texi b/doc/posix-functions/getcwd.texi
index 1f6dd18..ce15345 100644 (file)
--- a/doc/posix-functions/getcwd.texi
+++ b/doc/posix-functions/getcwd.texi
@@ -10,13 +10,21 @@ Portability problems fixed by either Gnulib module @code{getcwd} or
 @code{getcwd-lgpl}:
 @itemize
 @item
+This function is declared in different header files (namely, @code{<io.h>} or
+@code{<direct.h>}) on some platforms:
+mingw, MSVC 9.
+@item
 On glibc platforms, @code{getcwd (NULL, n)} allocates memory for the result.
-On some other platforms, this call is not allowed.  Conversely, mingw fails
-to honor non-zero @code{n}.
+On some other platforms, this call is not allowed.
 @item
 On some platforms, the prototype for @code{getcwd} uses @code{int}
-instead of @code{size_t} for the size argument:
-mingw.
+instead of @code{size_t} for the size argument when using non-standard
+headers, and the declaration is missing from @code{<unistd.h>}:
+mingw, MSVC 9.
+@item
+On some platforms, @code{getcwd (buf, 0)} fails with @code{ERANGE}
+instead of the required @code{EINVAL}:
+mingw, MSVC 9.
 @end itemize
 
 Portability problems fixed by Gnulib module @code{getcwd}:
@@ -25,9 +33,17 @@ Portability problems fixed by Gnulib module @code{getcwd}:
 This function is missing on some older platforms.
 @item
 This function does not handle long file names (greater than @code{PATH_MAX})
-correctly on some platforms.
+correctly on some platforms:
+glibc on Linux 2.4.20, Mac OS X 10.5, FreeBSD 6.4, NetBSD 5.1, OpenBSD 4.9, AIX 7.1.
 @end itemize
 
 Portability problems not fixed by Gnulib:
 @itemize
+@item
+When using @code{getcwd(NULL, nonzero)}, some platforms, such as glibc
+or cygwin, allocate exactly @code{nonzero} bytes and fail with
+@code{ERANGE} if it was not big enough, while other platforms, such as
+FreeBSD, mingw, or MSVC 9, ignore the size argument and allocate whatever size
+is necessary.  If this call succeeds, an application cannot portably
+access beyond the string length of the result.
 @end itemize