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/*
Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "errno.h"
#include "fs_attr.hpp"
#include "fs_clonepath.hpp"
#include "fs_lchown.hpp"
#include "fs_lstat.hpp"
#include "fs_lutimens.hpp"
#include "fs_mkdir.hpp"
#include "fs_path.hpp"
#include "fs_xattr.hpp"
#include "ugid.hpp"
#include <string>
using std::string;
namespace l
{
static
bool
ignorable_error(const int err_)
{
switch(err_)
{
case ENOTTY:
case ENOTSUP:
#if ENOTSUP != EOPNOTSUPP
case EOPNOTSUPP:
#endif
return true;
}
return false;
}
}
namespace fs
{
/*
Attempts to clone a path.
The directories which already exist are left alone.
The new directories have metadata set to match the original if
possible. Optionally ignore errors on metadata copies.
*/
int
clonepath(const string &fromsrc_,
const string &tosrc_,
const char *relative_,
const bool return_metadata_errors_)
{
int rv;
struct stat st;
string topath;
string frompath;
string dirname;
if((relative_ == NULL) || (relative_[0] == '\0'))
return 0;
dirname = fs::path::dirname(relative_);
if(dirname != "/")
{
rv = fs::clonepath(fromsrc_,tosrc_,dirname,return_metadata_errors_);
if(rv == -1)
return -1;
}
frompath = fs::path::make(fromsrc_,relative_);
rv = fs::lstat(frompath,&st);
if(rv == -1)
return -1;
else if(!S_ISDIR(st.st_mode))
return (errno=ENOTDIR,-1);
topath = fs::path::make(tosrc_,relative_);
rv = fs::mkdir(topath,st.st_mode);
if(rv == -1)
{
if(errno == EEXIST)
return 0;
else
return -1;
}
// it may not support it... it's fine...
rv = fs::attr::copy(frompath,topath);
if(return_metadata_errors_ && (rv == -1) && !l::ignorable_error(errno))
return -1;
// it may not support it... it's fine...
rv = fs::xattr::copy(frompath,topath);
if(return_metadata_errors_ && (rv == -1) && !l::ignorable_error(errno))
return -1;
rv = fs::lchown_check_on_error(topath,st);
if(return_metadata_errors_ && (rv == -1))
return -1;
rv = fs::lutimens(topath,st);
if(return_metadata_errors_ && (rv == -1))
return -1;
return 0;
}
int
clonepath(const string &from_,
const string &to_,
const string &relative_,
const bool return_metadata_errors_)
{
return fs::clonepath(from_,
to_,
relative_.c_str(),
return_metadata_errors_);
}
int
clonepath_as_root(const string &from_,
const string &to_,
const char *relative_,
const bool return_metadata_errors_)
{
if((relative_ == NULL) || (relative_[0] == '\0'))
return 0;
if(from_ == to_)
return 0;
{
const ugid::SetRootGuard ugidGuard;
return fs::clonepath(from_,to_,relative_,return_metadata_errors_);
}
}
int
clonepath_as_root(const string &from_,
const string &to_,
const string &relative_,
const bool return_metadata_errors_)
{
return fs::clonepath_as_root(from_,to_,relative_.c_str(),return_metadata_errors_);
}
}