1 // Miscellaneous functions
3 // Copyright (C) 2019-2021 Simon Ruderich
5 // This program is free software: you can redistribute it and/or modify
6 // it under the terms of the GNU Affero General Public License as published by
7 // the Free Software Foundation, either version 3 of the License, or
8 // (at your option) any later version.
10 // This program is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 // GNU Affero General Public License for more details.
15 // You should have received a copy of the GNU Affero General Public License
16 // along with this program. If not, see <https://www.gnu.org/licenses/>.
26 func alignBufferTo(b *bytes.Buffer, align int) {
28 panic(fmt.Sprintf("invalid alignment %v", align))
35 for i := 0; i < align-l%align; i++ {
40 // syncPath syncs path, which should be a directory. To guarantee durability
41 // it must be called on a parent directory after adding, renaming or removing
44 // Calling sync on the files itself is not enough according to POSIX; man 2
45 // fsync: "Calling fsync() does not necessarily ensure that the entry in the
46 // directory containing the file has also reached disk. For that an explicit
47 // fsync() on a file descriptor for the directory is also needed."
48 func syncPath(path string) error {
49 x, err := os.Open(path)