-/* PSPP - computes sample statistics.
- Copyright (C) 2004 Free Software Foundation, Inc.
+/* PSPP - a program for statistical analysis.
+ Copyright (C) 2004, 2010, 2015 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
- This program 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
- General Public License for more details.
+ This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
+
+#include "data/make-file.h"
+#include "libpspp/i18n.h"
+
#include <assert.h>
-#include <stdlib.h>
-#include <string.h>
#include <errno.h>
+#include <fcntl.h>
#include <stdio.h>
-#include "file-name.h"
-#include "make-file.h"
-#include <libpspp/message.h>
-#include <libpspp/alloc.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "data/file-name.h"
+#include "data/file-handle-def.h"
+#include "libpspp/ll.h"
+#include "libpspp/message.h"
+
+#include "gl/fatal-signal.h"
+#include "gl/tempname.h"
+#include "gl/xalloc.h"
+#include "gl/xvasprintf.h"
+#include "gl/localcharset.h"
#include "gettext.h"
#define _(msgid) gettext (msgid)
-/* Non ansi compilers may set this */
-#ifndef P_tmpdir
-#define P_tmpdir "/tmp"
-#endif
-/* Creates a temporary file and stores its name in *FILE_NAME and
- a file descriptor for it in *FD. Returns success. Caller is
- responsible for freeing *FILE_NAME. */
-int
-make_temp_file (int *fd, char **file_name)
+#if defined _WIN32 || defined __WIN32__
+#define WIN32_LEAN_AND_MEAN /* avoid including junk */
+#include <windows.h>
+#define TS_stat _stat
+#define Tunlink _wunlink
+#define Topen _wopen
+#define Tstat _wstat
+
+/* Shamelessly lifted and modified from the rpl_rename function in Gnulib */
+static int
+Trename (TCHAR const *src, TCHAR const *dst)
{
- const char *parent_dir;
+ int error;
- assert (file_name != NULL);
- assert (fd != NULL);
+ /* MoveFileExW works if SRC is a directory without any flags, but
+ fails with MOVEFILE_REPLACE_EXISTING, so try without flags first.
+ Thankfully, MoveFileExW handles hard links correctly, even though
+ rename() does not. */
+ if (MoveFileExW (src, dst, 0))
+ return 0;
- if (getenv ("TMPDIR") != NULL)
- parent_dir = getenv ("TMPDIR");
- else
- parent_dir = P_tmpdir;
+ /* Retry with MOVEFILE_REPLACE_EXISTING if the move failed
+ due to the destination already existing. */
+ error = GetLastError ();
+ if (error == ERROR_FILE_EXISTS || error == ERROR_ALREADY_EXISTS)
+ {
+ if (MoveFileExW (src, dst, MOVEFILE_REPLACE_EXISTING))
+ return 0;
- *file_name = xmalloc (strlen (parent_dir) + 32);
- sprintf (*file_name, "%s/psppXXXXXX", parent_dir);
- *fd = mkstemp (*file_name);
- if (*fd < 0)
+ error = GetLastError ();
+ }
+
+ switch (error)
{
- msg (ME, _("%s: Creating temporary file: %s."),
- *file_name, strerror (errno));
- free (*file_name);
- *file_name = NULL;
- return 0;
+ case ERROR_FILE_NOT_FOUND:
+ case ERROR_PATH_NOT_FOUND:
+ case ERROR_BAD_PATHNAME:
+ case ERROR_DIRECTORY:
+ errno = ENOENT;
+ break;
+
+ case ERROR_ACCESS_DENIED:
+ case ERROR_SHARING_VIOLATION:
+ errno = EACCES;
+ break;
+
+ case ERROR_OUTOFMEMORY:
+ errno = ENOMEM;
+ break;
+
+ case ERROR_CURRENT_DIRECTORY:
+ errno = EBUSY;
+ break;
+
+ case ERROR_NOT_SAME_DEVICE:
+ errno = EXDEV;
+ break;
+
+ case ERROR_WRITE_PROTECT:
+ errno = EROFS;
+ break;
+
+ case ERROR_WRITE_FAULT:
+ case ERROR_READ_FAULT:
+ case ERROR_GEN_FAILURE:
+ errno = EIO;
+ break;
+
+ case ERROR_HANDLE_DISK_FULL:
+ case ERROR_DISK_FULL:
+ case ERROR_DISK_TOO_FRAGMENTED:
+ errno = ENOSPC;
+ break;
+
+ case ERROR_FILE_EXISTS:
+ case ERROR_ALREADY_EXISTS:
+ errno = EEXIST;
+ break;
+
+ case ERROR_BUFFER_OVERFLOW:
+ case ERROR_FILENAME_EXCED_RANGE:
+ errno = ENAMETOOLONG;
+ break;
+
+ case ERROR_INVALID_NAME:
+ case ERROR_DELETE_PENDING:
+ errno = EPERM; /* ? */
+ break;
+
+# ifndef ERROR_FILE_TOO_LARGE
+/* This value is documented but not defined in all versions of windows.h. */
+# define ERROR_FILE_TOO_LARGE 223
+# endif
+ case ERROR_FILE_TOO_LARGE:
+ errno = EFBIG;
+ break;
+
+ default:
+ errno = EINVAL;
+ break;
}
- return 1;
+
+ return -1;
+}
+
+TCHAR *
+convert_to_filename_encoding (const char *s, size_t len, const char *current_encoding)
+{
+ const char *enc = current_encoding;
+ if (NULL == enc || 0 == strcmp (enc, "Auto"))
+ enc = locale_charset ();
+
+ return (TCHAR *) recode_string ("UTF-16LE", enc, s, len);
+}
+
+
+#else
+#define TS_stat stat
+#define Trename rename
+#define Tunlink unlink
+#define Topen open
+#define Tstat stat
+
+TCHAR *
+convert_to_filename_encoding (const char *s, size_t len UNUSED, const char *current_encoding UNUSED)
+{
+ /* Non-windows systems don't care about the encoding.
+ The string is copied here, to be consistent with the w32 case. */
+ return xstrdup (s);
}
+#endif
+
-/* Creates a temporary file and stores its name in *FILE_NAME and
- a file stream for it in *FP. Returns success. Caller is
- responsible for freeing *FILE_NAME and for closing *FP */
-int
-make_unique_file_stream (FILE **fp, char **file_name)
+struct replace_file
{
- static int serial = 0;
- const char *parent_dir;
+ struct ll ll;
+ TCHAR *file_name;
+ TCHAR *tmp_name;
+ char *tmp_name_verbatim;
+ const char *file_name_verbatim;
+};
- /* FIXME:
- Need to check for pre-existing file name.
- Need also to pass in the directory instead of using /tmp
- */
+static struct ll_list all_files = LL_INITIALIZER (all_files);
- assert (file_name != NULL);
- assert (fp != NULL);
+static void free_replace_file (struct replace_file *);
+static void unlink_replace_files (void);
- if (getenv ("TMPDIR") != NULL)
- parent_dir = getenv ("TMPDIR");
- else
- parent_dir = P_tmpdir;
+struct replace_file *
+replace_file_start_fd (const struct file_handle *fh,
+ bool binary, mode_t permissions, int *fd)
+{
+ static bool registered;
+ struct TS_stat s;
+ struct replace_file *rf;
+ int saved_errno = errno;
+
+ const char *file_name = fh_get_file_name (fh);
+
+ TCHAR * Tfile_name = convert_to_filename_encoding (file_name, strlen (file_name), fh_get_file_name_encoding (fh));
+
+ /* If FILE_NAME represents a special file, write to it directly
+ instead of trying to replace it. */
+ if (Tstat (Tfile_name, &s) == 0 && !S_ISREG (s.st_mode))
+ {
+ /* Open file descriptor. */
+ *fd = Topen (Tfile_name, O_WRONLY);
+ if (*fd < 0)
+ {
+ saved_errno = errno;
+ msg (ME, _("Opening %s for writing: %s."),
+ file_name, strerror (saved_errno));
+ free (Tfile_name);
+ return NULL;
+ }
+
+ rf = xzalloc (sizeof *rf);
+ rf->file_name = NULL;
+ rf->tmp_name = Tfile_name;
+ return rf;
+ }
+
+ if (!registered)
+ {
+ at_fatal_signal (unlink_replace_files);
+ registered = true;
+ }
+ block_fatal_signals ();
+
+ rf = xzalloc (sizeof *rf);
+ rf->file_name = Tfile_name;
+ rf->file_name_verbatim = file_name;
+
+ for (;;)
+ {
+ /* Generate unique temporary file name. */
+ free (rf->tmp_name_verbatim);
+ rf->tmp_name_verbatim = xasprintf ("%stmpXXXXXX", file_name);
+ if (gen_tempname (rf->tmp_name_verbatim, 0, 0600, GT_NOCREATE) < 0)
+ {
+ saved_errno = errno;
+ msg (ME, _("Creating temporary file to replace %s: %s."),
+ file_name, strerror (saved_errno));
+ goto error;
+ }
+
+ rf->tmp_name = convert_to_filename_encoding (rf->tmp_name_verbatim, strlen (rf->tmp_name_verbatim), fh_get_file_name_encoding (fh));
+
+ /* Create file by that name. */
+ int flags = O_WRONLY | O_CREAT | O_EXCL | (binary ? O_BINARY : O_TEXT);
+ *fd = Topen (rf->tmp_name, flags, permissions);
+ if (*fd >= 0)
+ break;
+ if (errno != EEXIST)
+ {
+ saved_errno = errno;
+ msg (ME, _("Creating temporary file %s: %s."),
+ rf->tmp_name_verbatim, strerror (saved_errno));
+ goto error;
+ }
+ }
- *file_name = xmalloc (strlen (parent_dir) + 32);
+ /* Register file for deletion. */
+ ll_push_head (&all_files, &rf->ll);
+ unblock_fatal_signals ();
- sprintf (*file_name, "%s/pspp%d.png", parent_dir, serial++);
+ return rf;
- *fp = fopen(*file_name, "w");
+ error:
+ unblock_fatal_signals ();
+ free_replace_file (rf);
+ *fd = -1;
+ errno = saved_errno;
+ return NULL;
+}
- if (! *fp )
+struct replace_file *
+replace_file_start (const struct file_handle *fh, bool binary,
+ mode_t permissions, FILE **fp)
+{
+ struct replace_file *rf;
+ int fd;
+
+ /* Open fd. */
+ rf = replace_file_start_fd (fh, binary, permissions, &fd);
+ if (!rf)
+ goto error;
+
+ /* Open file as stream. */
+ *fp = fdopen (fd, binary ? "wb" : "w");
+ if (*fp == NULL)
{
- msg (ME, _("%s: Creating file: %s."), *file_name, strerror (errno));
- free (*file_name);
- *file_name = NULL;
- return 0;
+ int error = errno;
+ msg (ME, _("Opening stream for temporary file %s: %s."),
+ rf->tmp_name_verbatim, strerror (error));
+ close (fd);
+ replace_file_abort (rf);
+ errno = error;
+
+ goto error;
}
- return 1;
+ return rf;
+
+error:
+ *fp = NULL;
+ return NULL;
}
+bool
+replace_file_commit (struct replace_file *rf)
+{
+ bool ok = true;
+ if (rf->file_name != NULL)
+ {
+ int save_errno;
+ block_fatal_signals ();
+ ok = Trename (rf->tmp_name, rf->file_name) == 0;
+ save_errno = errno;
+ ll_remove (&rf->ll);
+ unblock_fatal_signals ();
+
+ if (!ok)
+ msg (ME, _("Replacing %s by %s: %s."),
+ rf->file_name_verbatim, rf->tmp_name_verbatim, strerror (save_errno));
+ }
+ else
+ {
+ /* Special file: no temporary file to rename. */
+ }
+ free_replace_file (rf);
+ return ok;
+}
+
+bool
+replace_file_abort (struct replace_file *rf)
+{
+ bool ok = true;
+
+ if (rf->file_name != NULL)
+ {
+ int save_errno;
+
+ block_fatal_signals ();
+ ok = Tunlink (rf->tmp_name) == 0;
+ save_errno = errno;
+ ll_remove (&rf->ll);
+ unblock_fatal_signals ();
+
+ if (!ok)
+ msg (ME, _("Removing %s: %s."), rf->tmp_name_verbatim, strerror (save_errno));
+ }
+ else
+ {
+ /* Special file: no temporary file to unlink. */
+ }
+ free_replace_file (rf);
+
+ return ok;
+}
+
+static void
+free_replace_file (struct replace_file *rf)
+{
+ free (rf->file_name);
+ free (rf->tmp_name);
+ free (rf->tmp_name_verbatim);
+ free (rf);
+}
+
+static void
+unlink_replace_files (void)
+{
+ struct replace_file *rf;
+
+ block_fatal_signals ();
+ ll_for_each (rf, struct replace_file, ll, &all_files)
+ {
+ /* We don't free_replace_file(RF) because calling free is unsafe
+ from an asynchronous signal handler. */
+ Tunlink (rf->tmp_name);
+ }
+ unblock_fatal_signals ();
+}
projects / pspp / blobdiff