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
27 by a new file, by creating a temporary file with the given
28 PERMISSIONS bits in the same directory as *FILE_NAME.
30 Special files are an exception: they are not atomically
31 replaced but simply opened for writing.
33 If successful, stores the temporary file's name in *TMP_NAME
34 and a stream for it opened according to MODE (which should be
35 "w" or "wb") in *FP. Returns a ticket that can be used to
36 commit or abort the file replacement. If neither action has
37 yet been taken, program termination via signal will cause
38 *TMP_FILE to be unlinked.
40 The caller is responsible for closing *FP, but *TMP_NAME is
41 owned by the callee. */
42 struct replace_file *replace_file_start (const struct file_handle *fh,
43 const char *mode, mode_t permissions,
44 FILE **fp, char **tmp_name);
46 /* Commits or aborts the replacement of a (potentially) existing
47 file by a new file, using the ticket returned by
48 replace_file_start. Returns success. */
49 bool replace_file_commit (struct replace_file *);
50 bool replace_file_abort (struct replace_file *);
52 #endif /* make-file.h */