--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libiberty/pex-msdos.c	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,319 @@
+/* Utilities to execute a program in a subprocess (possibly linked by pipes
+   with other subprocesses), and wait for it.  Generic MSDOS 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_STRING_H
+#include <string.h>
+#endif
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+
+#include "safe-ctype.h"
+#include <process.h>
+
+/* The structure we keep in obj->sysdep.  */
+
+#define PEX_MSDOS_FILE_COUNT 3
+
+#define PEX_MSDOS_FD_OFFSET 10
+
+struct pex_msdos
+{
+  /* An array of file names.  We refer to these using file descriptors
+     of 10 + array index.  */
+  const char *files[PEX_MSDOS_FILE_COUNT];
+  /* Exit statuses of programs which have been run.  */
+  int *statuses;
+};
+
+static int pex_msdos_open (struct pex_obj *, const char *, int);
+static int pex_msdos_open (struct pex_obj *, const char *, int);
+static int pex_msdos_fdindex (struct pex_msdos *, int);
+static pid_t pex_msdos_exec_child (struct pex_obj *, int, const char *,
+				  char * const *, char * const *,
+				  int, int, int, int,
+				  int, const char **, int *);
+static int pex_msdos_close (struct pex_obj *, int);
+static int pex_msdos_wait (struct pex_obj *, pid_t, int *, struct pex_time *,
+			   int, const char **, int *);
+static void pex_msdos_cleanup (struct pex_obj *);
+
+/* The list of functions we pass to the common routines.  */
+
+const struct pex_funcs funcs =
+{
+  pex_msdos_open,
+  pex_msdos_open,
+  pex_msdos_exec_child,
+  pex_msdos_close,
+  pex_msdos_wait,
+  NULL, /* pipe */
+  NULL, /* fdopenr */
+  NULL, /* fdopenw */
+  pex_msdos_cleanup
+};
+
+/* Return a newly initialized pex_obj structure.  */
+
+struct pex_obj *
+pex_init (int flags, const char *pname, const char *tempbase)
+{
+  struct pex_obj *ret;
+  int i;
+
+  /* MSDOS does not support pipes.  */
+  flags &= ~ PEX_USE_PIPES;
+
+  ret = pex_init_common (flags, pname, tempbase, funcs);
+
+  ret->sysdep = XNEW (struct pex_msdos);
+  for (i = 0; i < PEX_MSDOS_FILE_COUNT; ++i)
+    ret->files[i] = NULL;
+  ret->statuses = NULL;
+
+  return ret;
+}
+
+/* Open a file.  FIXME: We ignore the binary argument, since we have
+   no way to handle it.  */
+
+static int
+pex_msdos_open (struct pex_obj *obj, const char *name,
+		int binary ATTRIBUTE_UNUSED)
+{
+  struct pex_msdos *ms;
+  int i;
+
+  ms = (struct pex_msdos *) obj->sysdep;
+
+  for (i = 0; i < PEX_MSDOS_FILE_COUNT; ++i)
+    {
+      if (ms->files[i] == NULL)
+	{
+	  ms->files[i] = xstrdup (name);
+	  return i + PEX_MSDOS_FD_OFFSET;
+	}
+    }
+
+  abort ();
+}
+
+/* Get the index into msdos->files associated with an open file
+   descriptor.  */
+
+static int
+pex_msdos_fdindex (struct pex_msdos *ms, int fd)
+{
+  fd -= PEX_MSDOS_FD_OFFSET;
+  if (fd < 0 || fd >= PEX_MSDOS_FILE_COUNT || ms->files[fd] == NULL)
+    abort ();
+  return fd;
+}
+
+
+/* Close a file.  */
+
+static int
+pex_msdos_close (struct pex_obj *obj, int fd)
+{
+  struct pex_msdos *ms;
+  int fdinex;
+
+  ms = (struct pex_msdos *) obj->sysdep;
+  fdindex = pe_msdos_fdindex (ms, fd);
+  free (ms->files[fdindex]);
+  ms->files[fdindex] = NULL;
+}
+
+/* Execute a child.  */
+
+static pid_t
+pex_msdos_exec_child (struct pex_obj *obj, int flags, const char *executable,
+		      char * const * argv, char * const * env, int in, int out,
+		      int toclose ATTRIBUTE_UNUSED,
+		      int errdes ATTRIBUTE_UNUSED, const char **errmsg,
+		      int *err)
+{
+  struct pex_msdos *ms;
+  char *temp_base;
+  int temp_base_allocated;
+  char *rf;
+  int inindex;
+  char *infile;
+  int outindex;
+  char *outfile;
+  char *scmd;
+  FILE *argfile;
+  int i;
+  int status;
+
+  ms = (struct pex_msdos *) obj->sysdep;
+
+  /* FIXME: I don't know how to redirect stderr, so we ignore ERRDES
+     and PEX_STDERR_TO_STDOUT.  */
+
+  temp_base = obj->temp_base;
+  if (temp_base != NULL)
+    temp_base_allocated = 0;
+  else
+    {
+      temp_base = choose_temp_base ();
+      temp_base_allocated = 1;
+    }
+
+  rf = concat (temp_base, ".gp", NULL);
+
+  if (temp_base_allocated)
+    free (temp_base);
+
+  if (in == STDIN_FILE_NO)
+    {
+      inindex = -1;
+      infile = "";
+    }
+  else
+    {
+      inindex = pex_msdos_fdindex (ms, in);
+      infile = ms->files[inindex];
+    }
+
+  if (out == STDOUT_FILE_NO)
+    {
+      outindex = -1;
+      outfile = "";
+    }
+  else
+    {
+      outindex = pex_msdos_fdindex (ms, out);
+      outfile = ms->files[outindex];
+    }
+
+  scmd = XNEWVEC (char, strlen (program)
+		  + ((flags & PEXECUTE_SEARCH) != 0 ? 4 : 0)
+		  + strlen (rf)
+		  + strlen (infile)
+		  + strlen (outfile)
+		  + 10);
+  sprintf (scmd, "%s%s @%s%s%s%s%s",
+	   program,
+	   (flags & PEXECUTE_SEARCH) != 0 ? ".exe" : "",
+	   rf,
+	   inindex != -1 ? " <" : "",
+	   infile,
+	   outindex != -1 ? " >" : "",
+	   outfile);
+
+  argfile = fopen (rf, "w");
+  if (argfile == NULL)
+    {
+      *err = errno;
+      free (scmd);
+      free (rf);
+      *errmsg = "cannot open temporary command file";
+      return (pid_t) -1;
+    }
+
+  for (i = 1; argv[i] != NULL; ++i)
+    {
+      char *p;
+
+      for (p = argv[i]; *p != '\0'; ++p)
+	{
+	  if (*p == '"' || *p == '\'' || *p == '\\' || ISSPACE (*p))
+	    putc ('\\', argfile);
+	  putc (*p, argfile);
+	}
+      putc ('\n', argfile);
+    }
+
+  fclose (argfile);
+
+  status = system (scmd);
+
+  if (status == -1)
+    {
+      *err = errno;
+      remove (rf);
+      free (scmd);
+      free (rf);
+      *errmsg = "system";
+      return (pid_t) -1;
+    }
+
+  remove (rf);
+  free (scmd);
+  free (rf);
+
+  /* Save the exit status for later.  When we are called, obj->count
+     is the number of children which have executed before this
+     one.  */
+  ms->statuses = XRESIZEVEC(int, ms->statuses, obj->count + 1);
+  ms->statuses[obj->count] = status;
+
+  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_msdos_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)
+{
+  struct pex_msdos *ms;
+
+  ms = (struct pex_msdos *) obj->sysdep;
+
+  if (time != NULL)
+    memset (time, 0, sizeof *time);
+
+  *status = ms->statuses[pid];
+
+  return 0;
+}
+
+/* Clean up the pex_msdos structure.  */
+
+static void
+pex_msdos_cleanup (struct pex_obj  *obj)
+{
+  struct pex_msdos *ms;
+  int i;
+
+  ms = (struct pex_msdos *) obj->sysdep;
+  for (i = 0; i < PEX_MSDOS_FILE_COUNT; ++i)
+    if (msdos->files[i] != NULL)
+      free (msdos->files[i]);
+  if (msdos->statuses != NULL)
+    free (msdos->statuses);
+  free (msdos);
+  obj->sysdep = NULL;
+}