/* Utility to pick a temporary filename prefix.
- Copyright (C) 1996, 1997, 1998, 2001 Free Software Foundation, Inc.
+ 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
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., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
+Boston, MA 02110-1301, USA. */
#ifdef HAVE_CONFIG_H
#include "config.h"
#include <stdio.h> /* May get P_tmpdir. */
#include <sys/types.h>
+#include <errno.h>
#ifdef HAVE_UNISTD_H
#include <unistd.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
#endif
#include "libiberty.h"
-extern int mkstemps PARAMS ((char *, int));
+extern int mkstemps (char *, int);
/* '/' works just fine on MS-DOS based systems. */
#ifndef DIR_SEPARATOR
#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 PARAMS ((const char *, const char *));
+static inline const char *try_dir (const char *, const char *);
static inline const char *
-try (dir, base)
- const char *dir, *base;
+try_dir (const char *dir, const char *base)
{
if (base != 0)
return base;
static const char vartmp[] =
{ DIR_SEPARATOR, 'v', 'a', 'r', DIR_SEPARATOR, 't', 'm', 'p', 0 };
+#endif
+
static char *memoized_tmpdir;
-char *
-choose_tmpdir ()
-{
- const char *base = 0;
- char *tmpdir;
- unsigned int len;
+/*
+
+@deftypefn Replacement char* choose_tmpdir ()
+
+Returns a pointer to a directory path suitable for creating temporary
+files in.
- if (memoized_tmpdir)
- return memoized_tmpdir;
+@end deftypefn
- base = try (getenv ("TMPDIR"), base);
- base = try (getenv ("TMP"), base);
- base = try (getenv ("TEMP"), base);
+*/
+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
- base = try (P_tmpdir, base);
+ /* 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 (vartmp, base);
- base = try (usrtmp, base);
- base = try (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 = xmalloc (len + 2);
- strcpy (tmpdir, base);
- tmpdir[len] = DIR_SEPARATOR;
- tmpdir[len+1] = '\0';
-
- memoized_tmpdir = tmpdir;
- return tmpdir;
+ /* 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;
}
-/* Return a temporary file name (as a string) or NULL if unable to create
- one. SUFFIX is a suffix to append to the file name. The string is
- malloced, and the temporary file has been created. */
+/*
+
+@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 (suffix)
- const char *suffix;
+make_temp_file (const char *suffix)
{
const char *base = choose_tmpdir ();
char *temp_filename;
base_len = strlen (base);
suffix_len = strlen (suffix);
- temp_filename = xmalloc (base_len
+ temp_filename = XNEWVEC (char, base_len
+ TEMP_FILE_LEN
+ suffix_len + 1);
strcpy (temp_filename, base);
strcpy (temp_filename + base_len + TEMP_FILE_LEN, suffix);
fd = mkstemps (temp_filename, suffix_len);
- /* If mkstemps failed, then something bad is happening. Maybe we should
- issue a message about a possible security attack in progress? */
+ /* Mkstemps failed. It may be EPERM, ENOSPC etc. */
if (fd == -1)
- abort ();
- /* Similarly if we can not close the file. */
+ {
+ 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;
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