upload android base code part8

android/toolchain/binutils/binutils-2.25/libiberty/make-temp-file.c

@@ -0,0 +1,217 @@
+/* Utility to pick a temporary filename prefix.
+   Copyright (C) 1996, 1997, 1998, 2001, 2009, 2010
+   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.  */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>	/* May get P_tmpdir.  */
+#include <sys/types.h>
+#include <errno.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+#ifdef HAVE_SYS_FILE_H
+#include <sys/file.h>   /* May get R_OK, etc. on some systems.  */
+#endif
+#if defined(_WIN32) && !defined(__CYGWIN__)
+#include <windows.h>
+#endif
+
+#ifndef R_OK
+#define R_OK 4
+#define W_OK 2
+#define X_OK 1
+#endif
+
+#include "libiberty.h"
+extern int mkstemps (char *, int);
+
+/* '/' works just fine on MS-DOS based systems.  */
+#ifndef DIR_SEPARATOR
+#define DIR_SEPARATOR '/'
+#endif
+
+/* Name of temporary file.
+   mktemp requires 6 trailing X's.  */
+#define TEMP_FILE "ccXXXXXX"
+#define TEMP_FILE_LEN (sizeof(TEMP_FILE) - 1)
+
+#if !defined(_WIN32) || defined(__CYGWIN__)
+
+/* Subroutine of choose_tmpdir.
+   If BASE is non-NULL, return it.
+   Otherwise it checks if DIR is a usable directory.
+   If success, DIR is returned.
+   Otherwise NULL is returned.  */
+
+static inline const char *try_dir (const char *, const char *);
+
+static inline const char *
+try_dir (const char *dir, const char *base)
+{
+  if (base != 0)
+    return base;
+  if (dir != 0
+      && access (dir, R_OK | W_OK | X_OK) == 0)
+    return dir;
+  return 0;
+}
+
+static const char tmp[] = { DIR_SEPARATOR, 't', 'm', 'p', 0 };
+static const char usrtmp[] =
+{ DIR_SEPARATOR, 'u', 's', 'r', DIR_SEPARATOR, 't', 'm', 'p', 0 };
+static const char vartmp[] =
+{ DIR_SEPARATOR, 'v', 'a', 'r', DIR_SEPARATOR, 't', 'm', 'p', 0 };
+
+#endif
+
+static char *memoized_tmpdir;
+
+/*
+
+@deftypefn Replacement const char* choose_tmpdir ()
+
+Returns a pointer to a directory path suitable for creating temporary
+files in.
+
+@end deftypefn
+
+*/
+
+const char *
+choose_tmpdir (void)
+{
+  if (!memoized_tmpdir)
+    {
+#if !defined(_WIN32) || defined(__CYGWIN__)
+      const char *base = 0;
+      char *tmpdir;
+      unsigned int len;
+      
+#ifdef VMS
+      /* Try VMS standard temp logical.  */
+      base = try_dir ("/sys$scratch", base);
+#else
+      base = try_dir (getenv ("TMPDIR"), base);
+      base = try_dir (getenv ("TMP"), base);
+      base = try_dir (getenv ("TEMP"), base);
+#endif
+      
+#ifdef P_tmpdir
+      /* We really want a directory name here as if concatenated with say \dir
+	 we do not end up with a double \\ which defines an UNC path.  */
+      if (strcmp (P_tmpdir, "\\") == 0)
+	base = try_dir ("\\.", base);
+      else
+	base = try_dir (P_tmpdir, base);
+#endif
+
+      /* Try /var/tmp, /usr/tmp, then /tmp.  */
+      base = try_dir (vartmp, base);
+      base = try_dir (usrtmp, base);
+      base = try_dir (tmp, base);
+      
+      /* If all else fails, use the current directory!  */
+      if (base == 0)
+	base = ".";
+      /* Append DIR_SEPARATOR to the directory we've chosen
+	 and return it.  */
+      len = strlen (base);
+      tmpdir = XNEWVEC (char, len + 2);
+      strcpy (tmpdir, base);
+      tmpdir[len] = DIR_SEPARATOR;
+      tmpdir[len+1] = '\0';
+      memoized_tmpdir = tmpdir;
+#else /* defined(_WIN32) && !defined(__CYGWIN__) */
+      DWORD len;
+
+      /* Figure out how much space we need.  */
+      len = GetTempPath(0, NULL);
+      if (len)
+	{
+	  memoized_tmpdir = XNEWVEC (char, len);
+	  if (!GetTempPath(len, memoized_tmpdir))
+	    {
+	      XDELETEVEC (memoized_tmpdir);
+	      memoized_tmpdir = NULL;
+	    }
+	}
+      if (!memoized_tmpdir)
+	/* If all else fails, use the current directory.  */
+	memoized_tmpdir = xstrdup (".\\");
+#endif /* defined(_WIN32) && !defined(__CYGWIN__) */
+    }
+
+  return memoized_tmpdir;
+}
+
+/*
+
+@deftypefn Replacement char* make_temp_file (const char *@var{suffix})
+
+Return a temporary file name (as a string) or @code{NULL} if unable to
+create one.  @var{suffix} is a suffix to append to the file name.  The
+string is @code{malloc}ed, and the temporary file has been created.
+
+@end deftypefn
+
+*/
+
+char *
+make_temp_file (const char *suffix)
+{
+  const char *base = choose_tmpdir ();
+  char *temp_filename;
+  int base_len, suffix_len;
+  int fd;
+
+  if (suffix == 0)
+    suffix = "";
+
+  base_len = strlen (base);
+  suffix_len = strlen (suffix);
+
+  temp_filename = XNEWVEC (char, base_len
+			   + TEMP_FILE_LEN
+			   + suffix_len + 1);
+  strcpy (temp_filename, base);
+  strcpy (temp_filename + base_len, TEMP_FILE);
+  strcpy (temp_filename + base_len + TEMP_FILE_LEN, suffix);
+
+  fd = mkstemps (temp_filename, suffix_len);
+  /* Mkstemps failed.  It may be EPERM, ENOSPC etc.  */
+  if (fd == -1)
+    {
+      fprintf (stderr, "Cannot create temporary file in %s: %s\n",
+	       base, strerror (errno));
+      abort ();
+    }
+  /* We abort on failed close out of sheer paranoia.  */
+  if (close (fd))
+    abort ();
+  return temp_filename;
+}