--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libiberty/pex-djgpp.c	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,294 @@
+/* Utilities to execute a program in a subprocess (possibly linked by pipes
+   with other subprocesses), and wait for it.  DJGPP specialization.
+   Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2005
+   Free Software Foundation, Inc.
+
+This file is part of the libiberty library.
+Libiberty is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+Libiberty is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with libiberty; see the file COPYING.LIB.  If not,
+write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
+Boston, MA 02110-1301, USA.  */
+
+#include "pex-common.h"
+
+#include <stdio.h>
+#include <errno.h>
+#ifdef NEED_DECLARATION_ERRNO
+extern int errno;
+#endif
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <process.h>
+
+/* Use ECHILD if available, otherwise use EINVAL.  */
+#ifdef ECHILD
+#define PWAIT_ERROR ECHILD
+#else
+#define PWAIT_ERROR EINVAL
+#endif
+
+static int pex_djgpp_open_read (struct pex_obj *, const char *, int);
+static int pex_djgpp_open_write (struct pex_obj *, const char *, int);
+static pid_t pex_djgpp_exec_child (struct pex_obj *, int, const char *,
+				  char * const *, char * const *,
+				  int, int, int, int,
+				  const char **, int *);
+static int pex_djgpp_close (struct pex_obj *, int);
+static int pex_djgpp_wait (struct pex_obj *, pid_t, int *, struct pex_time *,
+			   int, const char **, int *);
+
+/* The list of functions we pass to the common routines.  */
+
+const struct pex_funcs funcs =
+{
+  pex_djgpp_open_read,
+  pex_djgpp_open_write,
+  pex_djgpp_exec_child,
+  pex_djgpp_close,
+  pex_djgpp_wait,
+  NULL, /* pipe */
+  NULL, /* fdopenr */
+  NULL, /* fdopenw */
+  NULL  /* cleanup */
+};
+
+/* Return a newly initialized pex_obj structure.  */
+
+struct pex_obj *
+pex_init (int flags, const char *pname, const char *tempbase)
+{
+  /* DJGPP does not support pipes.  */
+  flags &= ~ PEX_USE_PIPES;
+  return pex_init_common (flags, pname, tempbase, &funcs);
+}
+
+/* Open a file for reading.  */
+
+static int
+pex_djgpp_open_read (struct pex_obj *obj ATTRIBUTE_UNUSED,
+		     const char *name, int binary)
+{
+  return open (name, O_RDONLY | (binary ? O_BINARY : O_TEXT));
+}
+
+/* Open a file for writing.  */
+
+static int
+pex_djgpp_open_write (struct pex_obj *obj ATTRIBUTE_UNUSED,
+		      const char *name, int binary)
+{
+  /* Note that we can't use O_EXCL here because gcc may have already
+     created the temporary file via make_temp_file.  */
+  return open (name,
+	       (O_WRONLY | O_CREAT | O_TRUNC
+		| (binary ? O_BINARY : O_TEXT)),
+	       S_IRUSR | S_IWUSR);
+}
+
+/* Close a file.  */
+
+static int
+pex_djgpp_close (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd)
+{
+  return close (fd);
+}
+
+/* Execute a child.  */
+
+static pid_t
+pex_djgpp_exec_child (struct pex_obj *obj, int flags, const char *executable,
+		      char * const * argv, char * const * env,
+                      int in, int out, int errdes,
+		      int toclose ATTRIBUTE_UNUSED, const char **errmsg,
+		      int *err)
+{
+  int org_in, org_out, org_errdes;
+  int status;
+  int *statuses;
+
+  org_in = -1;
+  org_out = -1;
+  org_errdes = -1;
+
+  if (in != STDIN_FILE_NO)
+    {
+      org_in = dup (STDIN_FILE_NO);
+      if (org_in < 0)
+	{
+	  *err = errno;
+	  *errmsg = "dup";
+	  return (pid_t) -1;
+	}
+      if (dup2 (in, STDIN_FILE_NO) < 0)
+	{
+	  *err = errno;
+	  *errmsg = "dup2";
+	  return (pid_t) -1;
+	}
+      if (close (in) < 0)
+	{
+	  *err = errno;
+	  *errmsg = "close";
+	  return (pid_t) -1;
+	}
+    }
+
+  if (out != STDOUT_FILE_NO)
+    {
+      org_out = dup (STDOUT_FILE_NO);
+      if (org_out < 0)
+	{
+	  *err = errno;
+	  *errmsg = "dup";
+	  return (pid_t) -1;
+	}
+      if (dup2 (out, STDOUT_FILE_NO) < 0)
+	{
+	  *err = errno;
+	  *errmsg = "dup2";
+	  return (pid_t) -1;
+	}
+      if (close (out) < 0)
+	{
+	  *err = errno;
+	  *errmsg = "close";
+	  return (pid_t) -1;
+	}
+    }
+
+  if (errdes != STDERR_FILE_NO
+      || (flags & PEX_STDERR_TO_STDOUT) != 0)
+    {
+      org_errdes = dup (STDERR_FILE_NO);
+      if (org_errdes < 0)
+	{
+	  *err = errno;
+	  *errmsg = "dup";
+	  return (pid_t) -1;
+	}
+      if (dup2 ((flags & PEX_STDERR_TO_STDOUT) != 0 ? STDOUT_FILE_NO : errdes,
+		 STDERR_FILE_NO) < 0)
+	{
+	  *err = errno;
+	  *errmsg = "dup2";
+	  return (pid_t) -1;
+	}
+      if (errdes != STDERR_FILE_NO)
+	{
+	  if (close (errdes) < 0)
+	    {
+	      *err = errno;
+	      *errmsg = "close";
+	      return (pid_t) -1;
+	    }
+	}
+    }
+
+  if (env)
+    status = (((flags & PEX_SEARCH) != 0 ? spawnvpe : spawnve)
+	      (P_WAIT, executable, argv, env));
+  else
+    status = (((flags & PEX_SEARCH) != 0 ? spawnvp : spawnv)
+  	      (P_WAIT, executable, argv));
+
+  if (status == -1)
+    {
+      *err = errno;
+      *errmsg = ((flags & PEX_SEARCH) != 0) ? "spawnvp" : "spawnv";
+    }
+
+  if (in != STDIN_FILE_NO)
+    {
+      if (dup2 (org_in, STDIN_FILE_NO) < 0)
+	{
+	  *err = errno;
+	  *errmsg = "dup2";
+	  return (pid_t) -1;
+	}
+      if (close (org_in) < 0)
+	{
+	  *err = errno;
+	  *errmsg = "close";
+	  return (pid_t) -1;
+	}
+    }
+
+  if (out != STDOUT_FILE_NO)
+    {
+      if (dup2 (org_out, STDOUT_FILE_NO) < 0)
+	{
+	  *err = errno;
+	  *errmsg = "dup2";
+	  return (pid_t) -1;
+	}
+      if (close (org_out) < 0)
+	{
+	  *err = errno;
+	  *errmsg = "close";
+	  return (pid_t) -1;
+	}
+    }
+
+  if (errdes != STDERR_FILE_NO
+      || (flags & PEX_STDERR_TO_STDOUT) != 0)
+    {
+      if (dup2 (org_errdes, STDERR_FILE_NO) < 0)
+	{
+	  *err = errno;
+	  *errmsg = "dup2";
+	  return (pid_t) -1;
+	}
+      if (close (org_errdes) < 0)
+	{
+	  *err = errno;
+	  *errmsg = "close";
+	  return (pid_t) -1;
+	}
+    }
+
+  /* Save the exit status for later.  When we are called, obj->count
+     is the number of children which have executed before this
+     one.  */
+  statuses = (int *) obj->sysdep;
+  statuses = XRESIZEVEC (int, statuses, obj->count + 1);
+  statuses[obj->count] = status;
+  obj->sysdep = (void *) statuses;
+
+  return (pid_t) obj->count;
+}
+
+/* Wait for a child process to complete.  Actually the child process
+   has already completed, and we just need to return the exit
+   status.  */
+
+static int
+pex_djgpp_wait (struct pex_obj *obj, pid_t pid, int *status,
+		struct pex_time *time, int done ATTRIBUTE_UNUSED,
+		const char **errmsg ATTRIBUTE_UNUSED,
+		int *err ATTRIBUTE_UNUSED)
+{
+  int *statuses;
+
+  if (time != NULL)
+    memset (time, 0, sizeof *time);
+
+  statuses = (int *) obj->sysdep;
+  *status = statuses[pid];
+
+  return 0;
+}