int fd_get_path(int fd, char **ret) {
char procfs_path[strlen("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
+ int r;
xsprintf(procfs_path, "/proc/self/fd/%i", fd);
- return readlink_malloc(procfs_path, ret);
+ r = readlink_malloc(procfs_path, ret);
+
+ if (r == -ENOENT) /* If the file doesn't exist the fd is invalid */
+ return -EBADF;
+
+ return r;
}
return 0;
}
+static int fsync_directory_of_file(int fd) {
+ _cleanup_free_ char *path = NULL, *dn = NULL;
+ _cleanup_close_ int dfd = -1;
+ struct stat st;
+ int r;
+
+ if (fstat(fd, &st) < 0)
+ return -errno;
+
+ if (!S_ISREG(st.st_mode))
+ return -EBADFD;
+
+ r = fd_get_path(fd, &path);
+ if (r < 0)
+ return r;
+
+ if (!path_is_absolute(path))
+ return -EINVAL;
+
+ dn = dirname_malloc(path);
+ if (!dn)
+ return -ENOMEM;
+
+ dfd = open(dn, O_RDONLY|O_CLOEXEC|O_DIRECTORY);
+ if (dfd < 0)
+ return -errno;
+
+ if (fsync(dfd) < 0)
+ return -errno;
+
+ return 0;
+}
+
static int journal_file_refresh_header(JournalFile *f) {
sd_id128_t boot_id;
int r;
/* Sync the online state to disk */
(void) fsync(f->fd);
+ /* We likely just created a new file, also sync the directory this file is located in. */
+ (void) fsync_directory_of_file(f->fd);
+
return r;
}