/*** This file is part of systemd. Copyright 2014 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <ftw.h> #include "aufs-util.h" #include "rm-rf.h" #include "string-util.h" #include "util.h" static int nftw_cb( const char *fpath, const struct stat *sb, int flag, struct FTW *ftwbuf) { const char *fn, *original; char *p; int r; fn = fpath + ftwbuf->base; /* We remove all whiteout files, and all whiteouts */ original = startswith(fn, ".wh."); if (!original) return FTW_CONTINUE; log_debug("Removing whiteout indicator %s.", fpath); r = rm_rf(fpath, REMOVE_ROOT|REMOVE_PHYSICAL); if (r < 0) return FTW_STOP; if (!startswith(fn, ".wh..wh.")) { p = alloca(ftwbuf->base + strlen(original)); strcpy(mempcpy(p, fpath, ftwbuf->base), original); log_debug("Removing deleted file %s.", p); r = rm_rf(p, REMOVE_ROOT|REMOVE_PHYSICAL); if (r < 0) return FTW_STOP; } return FTW_CONTINUE; } int aufs_resolve(const char *path) { int r; errno = 0; r = nftw(path, nftw_cb, 64, FTW_MOUNT|FTW_PHYS|FTW_ACTIONRETVAL); if (r == FTW_STOP) return errno > 0 ? -errno : -EIO; return 0; }