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127 lines
3.2 KiB
127 lines
3.2 KiB
/*
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Copyright (c) 2016, 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 "fs_clonepath.hpp"
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#include "errno.h"
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#include "fs_attr.hpp"
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#include "fs_clonepath.hpp"
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#include "fs_lchown.hpp"
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#include "fs_lstat.hpp"
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#include "fs_lutimens.hpp"
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#include "fs_mkdir.hpp"
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#include "fs_path.hpp"
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#include "fs_xattr.hpp"
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#include "ugid.hpp"
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static
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bool
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_ignorable_error(const int err_)
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{
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switch(err_)
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{
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case ENOTTY:
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case ENOTSUP:
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#if ENOTSUP != EOPNOTSUPP
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case EOPNOTSUPP:
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#endif
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return true;
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}
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return false;
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}
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/*
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Attempts to clone a path.
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The directories which already exist are left alone.
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The new directories have metadata set to match the original if
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possible. Optionally ignore errors on metadata copies.
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*/
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int
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fs::clonepath(const fs::path &srcpath_,
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const fs::path &dstpath_,
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const fs::path &relpath_,
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const bool return_metadata_errors_)
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{
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int rv;
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struct stat st;
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fs::path dstpath;
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fs::path srcpath;
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fs::path dirname;
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if(relpath_.empty())
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return 0;
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dirname = relpath_.parent_path();
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if(!dirname.empty())
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{
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rv = fs::clonepath(srcpath_,dstpath_,dirname,return_metadata_errors_);
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if(rv < 0)
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return rv;
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}
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srcpath = srcpath_ / relpath_;
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rv = fs::lstat(srcpath,&st);
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if(rv < 0)
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return rv;
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else if(!S_ISDIR(st.st_mode))
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return -ENOTDIR;
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dstpath = dstpath_ / relpath_;
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rv = fs::mkdir(dstpath,st.st_mode);
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if(rv < 0)
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return ((rv == -EEXIST) ? 0 : rv);
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// it may not support it... it's fine...
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rv = fs::attr::copy(srcpath,dstpath);
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if(return_metadata_errors_ && (rv < 0) && !::_ignorable_error(-rv))
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return rv;
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// it may not support it... it's fine...
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rv = fs::xattr::copy(srcpath,dstpath);
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if(return_metadata_errors_ && (rv < 0) && !::_ignorable_error(-rv))
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return rv;
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rv = fs::lchown_check_on_error(dstpath,st);
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if(return_metadata_errors_ && (rv < 0))
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return rv;
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rv = fs::lutimens(dstpath,st);
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if(return_metadata_errors_ && (rv < 0))
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return rv;
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return 0;
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}
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int
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fs::clonepath_as_root(const fs::path &srcpath_,
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const fs::path &dstpath_,
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const fs::path &relpath_,
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const bool return_metadata_errors_)
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{
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if(relpath_.empty())
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return 0;
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if(srcpath_ == dstpath_)
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return 0;
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const ugid::SetRootGuard ugid_guard;
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return fs::clonepath(srcpath_,
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dstpath_,
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relpath_,
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return_metadata_errors_);
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}
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