1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2004, 2010 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include <sys/types.h>
26 /* Prepares to atomically replace a (potentially) existing file by a new file,
27 by creating a temporary file with the given PERMISSIONS bits.
29 Special files are an exception: they are not atomically
30 replaced but simply opened for writing.
32 If successful, returns a ticket that can be used to commit or abort the file
33 replacement. If neither action is taken, program termination via signal
34 will abort. Depending on the function, stores a file descriptor in *FD or a
35 stream in *FP for the newly opened file. The descriptor or stream is opened
36 for writing a binary file if BINARY is true, otherwise a text file (this
37 disctinction only matters on Windows).
39 On error, returns NULL and stores NULL in *FP or -1 in *FD.
41 The caller is responsible for closing *FP or *FD. */
43 struct replace_file *replace_file_start (const struct file_handle *fh,
44 bool binary, mode_t permissions,
46 struct replace_file *replace_file_start_fd (const struct file_handle *fh,
48 mode_t permissions, int *fd);
50 /* Commits or aborts the replacement of a (potentially) existing
51 file by a new file, using the ticket returned by
52 replace_file_start. Returns success. */
53 bool replace_file_commit (struct replace_file *);
54 bool replace_file_abort (struct replace_file *);
56 #endif /* make-file.h */