X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fdata%2Fmake-file.h;h=19d33ebe76bfc070b0f28aed4c11bc61c89b7111;hb=e624e2da6ea68d22e6d4fba4eaa96d37d07a6730;hp=88fa879b49b017a5070b301da13e59fe4573f8a6;hpb=dcf9b154cbcaa35c3d8459a201b77eec8bcb30bd;p=pspp

diff --git a/src/data/make-file.h b/src/data/make-file.h
index 88fa879b49..19d33ebe76 100644
--- a/src/data/make-file.h
+++ b/src/data/make-file.h
@@ -1,35 +1,59 @@
-/* PSPP - computes sample statistics.
+/* PSPP - a program for statistical analysis.
    Copyright (C) 2004 Free Software Foundation, Inc.
-   Written by Ben Pfaff <blp@gnu.org>.
 
-   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/>. */
 
 #ifndef MKFILE_H
 #define MKFILE_H
 
 
-/* Creates a temporary file and stores its name in *FILENAME and
+/* 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 *FILENAME. */
-int make_temp_file (int *fd, char **filename); 
+   responsible for freeing *FILE_NAME. */
+int make_temp_file (int *fd, char **file_name);
 
 
-/* Creates a temporary file and stores its name in *FILENAME and
+/* 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 *FILENAME. */
-int make_unique_file_stream (FILE **fp, char **filename) ;
+   responsible for freeing *FILE_NAME. */
+int make_unique_file_stream (FILE **fp, char **file_name) ;
+
+
+/* Prepares to atomically replace a (potentially) existing file
+   by a new file, by creating a temporary file with the given
+   PERMISSIONS bits in the same directory as *FILE_NAME.
+
+   Special files are an exception: they are not atomically
+   replaced but simply opened for writing.
+
+   If successful, stores the temporary file's name in *TMP_NAME
+   and a stream for it opened according to MODE (which should be
+   "w" or "wb") in *FP.  Returns a ticket that can be used to
+   commit or abort the file replacement.  If neither action has
+   yet been taken, program termination via signal will cause
+   *TMP_FILE to be unlinked.
+
+   The caller is responsible for closing *FP, but *TMP_NAME is
+   owned by the callee. */
+struct replace_file *replace_file_start (const char *file_name,
+                                         const char *mode, mode_t permissions,
+                                         FILE **fp, char **tmp_name);
+
+/* Commits or aborts the replacement of a (potentially) existing
+   file by a new file, using the ticket returned by
+   replace_file_start.  Returns success. */
+bool replace_file_commit (struct replace_file *);
+bool replace_file_abort (struct replace_file *);
 
 #endif /* make-file.h */