* libiberty/configure.ac: Add cygpath for mingw hosts.

	* libiberty.configure: Rebuilt.
	* libiberty/Makefile.in: Add cygpath.
	* libiberty/cygpath.c: New.

	* include/libiberty.h (pex_write_input): New declaration.

	* libiberty/pex-common.c (pex_write_input): New function.
	* libiberty/pexecute.txh (pex_write_input): Document it.
	* libiberty/pex-common.h (struct pex_funcs): New function ptr fdopenw.
	* libiberty/pex-unix.c (pex_unix_fdopenw): New function.
	(funcs): List it as our fdopenw function.
	* libiberty/pex-win32.c (pex_win32_fdopenw): New function.
	(funcs): List it as our fdopenw function.
	* libiberty/pex-djgpp.c (funcs): Leave fdopenw null.
	* libiberty/pex-msdos (funcs): Same.
	* libiberty/functions.texi: Regenerated.

	* libiberty/pex-common.h (struct pex_obj): Doc fixes.

	* libiberty/functions.texi: Regenerate.

2 files changed, 53 insertions, 0 deletions

diff --git a/ChangeLog.csl b/ChangeLog.csl
index 739f40f07..b139379d7 100644
--- a/ChangeLog.csl
+++ b/ChangeLog.csl
@@ -1,3 +1,29 @@
+2006-03-30  Mark Mitchell <mark@codesourcery.com>
+
+	* libiberty/configure.ac: Add cygpath for mingw hosts.
+	* libiberty.configure: Rebuilt.
+	* libiberty/Makefile.in: Add cygpath.
+	* libiberty/cygpath.c: New.
+
+2006-03-30  Jim Blandy	<jimb@codesourcery.com>
+
+	* include/libiberty.h (pex_write_input): New declaration.
+
+	* libiberty/pex-common.c (pex_write_input): New function.
+	* libiberty/pexecute.txh (pex_write_input): Document it.
+	* libiberty/pex-common.h (struct pex_funcs): New function ptr fdopenw.
+	* libiberty/pex-unix.c (pex_unix_fdopenw): New function.
+	(funcs): List it as our fdopenw function.
+	* libiberty/pex-win32.c (pex_win32_fdopenw): New function.
+	(funcs): List it as our fdopenw function.
+	* libiberty/pex-djgpp.c (funcs): Leave fdopenw null.
+	* libiberty/pex-msdos (funcs): Same.
+	* libiberty/functions.texi: Regenerated.
+
+	* libiberty/pex-common.h (struct pex_obj): Doc fixes.
+
+	* libiberty/functions.texi: Regenerate.
+
 2006-03-27  Mark Mitchell  <mark@codesourcery.com>
 
 	* libiberty/pex-win32.c (pex_win32_exec_child): Close stdout/stderr
diff --git a/include/libiberty.h b/include/libiberty.h
index c264cb2ab..6fdc6e9d0 100644
--- a/include/libiberty.h
+++ b/include/libiberty.h
@@ -448,6 +448,33 @@ extern const char *pex_run (struct pex_obj *obj, int flags,
 			    const char *outname, const char *errname,
 			    int *err);
 
+/* Return a `FILE' pointer FP for the standard input of the first
+   program in the pipeline; FP is opened for writing.  You must have
+   passed `PEX_USE_PIPES' to the `pex_init' call that returned OBJ.
+   You must close FP yourself with `fclose' to indicate that the
+   pipeline's input is complete.
+
+   The file descriptor underlying FP is marked not to be inherited by
+   child processes.
+
+   This call is not supported on systems which do not support pipes;
+   it returns with an error.  (We could implement it by writing a
+   temporary file, but then you would need to write all your data and
+   close FP before your first call to `pex_run' -- and that wouldn't
+   work on systems that do support pipes: the pipe would fill up, and
+   you would block.  So there isn't any easy way to conceal the
+   differences between the two types of systems.)
+
+   If you call both `pex_write_input' and `pex_read_output', be
+   careful to avoid deadlock.  If the output pipe fills up, so that
+   each program in the pipeline is waiting for the next to read more
+   data, and you fill the input pipe by writing more data to FP, then
+   there is no way to make progress: the only process that could read
+   data from the output pipe is you, but you are blocked on the input
+   pipe.  */
+
+extern FILE *pex_write_input (struct pex_obj *obj, int binary);
+
 /* Read the standard output of the last program to be executed.
    pex_run can not be called after this.  BINARY should be non-zero if
    the file should be opened in binary mode; this is ignored on Unix.