mirror of https://github.com/trapexit/mergerfs.git
110 lines
2.6 KiB
110 lines
2.6 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 <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <string>
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#include "errno.h"
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#include "fs_attr.hpp"
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#include "fs_path.hpp"
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#include "fs_xattr.hpp"
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using std::string;
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namespace fs
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{
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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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int
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clonepath(const string &fromsrc,
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const string &tosrc,
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const char *relative)
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{
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int rv;
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struct stat st;
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string topath;
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string frompath;
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string dirname;
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dirname = relative;
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fs::path::dirname(dirname);
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if(!dirname.empty())
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{
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rv = clonepath(fromsrc,tosrc,dirname.c_str());
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if(rv == -1)
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return -1;
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}
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fs::path::make(&fromsrc,relative,frompath);
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rv = ::stat(frompath.c_str(),&st);
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if(rv == -1)
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return -1;
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else if(!S_ISDIR(st.st_mode))
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return (errno = ENOTDIR,-1);
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fs::path::make(&tosrc,relative,topath);
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rv = ::mkdir(topath.c_str(),st.st_mode);
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if(rv == -1)
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{
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if(errno != EEXIST)
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return -1;
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rv = ::chmod(topath.c_str(),st.st_mode);
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if(rv == -1)
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return -1;
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}
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// It may not support it... it's fine...
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rv = fs::attr::copy(frompath,topath);
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if(rv == -1 && !ignorable_error(errno))
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return -1;
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rv = fs::xattr::copy(frompath,topath);
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if(rv == -1 && !ignorable_error(errno))
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return -1;
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rv = ::chown(topath.c_str(),st.st_uid,st.st_gid);
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if(rv == -1)
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return -1;
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struct timespec times[2];
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times[0] = st.st_atim;
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times[1] = st.st_mtim;
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rv = ::utimensat(-1,topath.c_str(),times,0);
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if(rv == -1)
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return -1;
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return 0;
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}
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}
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