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153 lines
3.4 KiB
153 lines
3.4 KiB
/*
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Copyright (c) 2018, Antonio SJ Musumeci <trapexit@spawn.link>
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "fuse_listxattr.hpp"
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#include "config.hpp"
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#include "errno.hpp"
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#include "fs_llistxattr.hpp"
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#include "ugid.hpp"
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#include "xattr.hpp"
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#include "fuse.h"
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#include <filesystem>
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#include <optional>
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#include <string>
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#include <cstring>
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static
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ssize_t
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_listxattr_size(const std::vector<Branch*> &branches_,
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const fs::path &fusepath_)
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{
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ssize_t size;
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fs::path fullpath;
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if(branches_.empty())
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return -ENOENT;
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size = 0;
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for(const auto branch : branches_)
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{
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ssize_t rv;
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fullpath = branch->path / fusepath_;
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rv = fs::llistxattr(fullpath,NULL,0);
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if(rv < 0)
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continue;
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size += rv;
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}
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return size;
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}
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static
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ssize_t
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_listxattr(const std::vector<Branch*> &branches_,
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const fs::path &fusepath_,
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char *list_,
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size_t size_)
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{
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ssize_t rv;
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ssize_t size;
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fs::path fullpath;
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std::optional<ssize_t> err;
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if(size_ == 0)
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return ::_listxattr_size(branches_,fusepath_);
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size = 0;
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err = -ENOENT;
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for(const auto branch : branches_)
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{
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fullpath = branch->path / fusepath_;
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rv = fs::llistxattr(fullpath,list_,size_);
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if(rv == -ERANGE)
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return -ERANGE;
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if(rv < 0)
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{
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if(!err.has_value())
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err = rv;
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continue;
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}
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err = 0;
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list_ += rv;
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size_ -= rv;
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size += rv;
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}
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if(err < 0)
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return err.value();
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return size;
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}
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static
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int
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_listxattr(const Policy::Search &searchFunc_,
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const Branches &ibranches_,
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const fs::path &fusepath_,
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char *list_,
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const size_t size_)
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{
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int rv;
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std::vector<Branch*> obranches;
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rv = searchFunc_(ibranches_,fusepath_,obranches);
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if(rv < 0)
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return rv;
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if(size_ == 0)
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return ::_listxattr_size(obranches,fusepath_);
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return ::_listxattr(obranches,fusepath_,list_,size_);
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}
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int
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FUSE::listxattr(const fuse_req_ctx_t *ctx_,
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const char *fusepath_,
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char *list_,
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size_t size_)
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{
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const fs::path fusepath{fusepath_};
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if(Config::is_ctrl_file(fusepath))
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return cfg.keys_listxattr(list_,size_);
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switch(cfg.xattr)
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{
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case XAttr::ENUM::PASSTHROUGH:
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break;
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case XAttr::ENUM::NOATTR:
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return 0;
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case XAttr::ENUM::NOSYS:
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return -ENOSYS;
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}
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const ugid::Set ugid(ctx_);
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return ::_listxattr(cfg.func.listxattr.policy,
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cfg.branches,
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fusepath,
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list_,
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size_);
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}
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