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/*
Copyright (C) 2007 Tim Mayberry
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <sys/stat.h>
#include <glib.h>
#include <glib/gstdio.h>
#include <giomm/file.h>
#include <cerrno>
#include <fstream>
#include <glibmm/fileutils.h>
#include <glibmm/miscutils.h>
#include "pbd/filesystem.h"
#include "pbd/error.h"
#include "pbd/compose.h"
#include "pbd/pathscanner.h"
#include "i18n.h"
using namespace std;
namespace PBD {
namespace sys {
path&
path::operator/=(const path& rhs)
{
m_path = Glib::build_filename(m_path, rhs.m_path);
return *this;
}
path&
path::operator/=(const string& rhs)
{
m_path = Glib::build_filename(m_path, rhs);
return *this;
}
path&
path::operator/=(const char* rhs)
{
m_path = Glib::build_filename(m_path, rhs);
return *this;
}
string
path::leaf () const
{
return Glib::path_get_basename(m_path);
}
path
path::branch_path () const
{
string dir = Glib::path_get_dirname (m_path);
/*
* glib returns "." to signify that the path
* has no directory components(branch path)
* whereas boost::filesystem returns an empty
* string
*/
if(dir == ".")
{
return "";
}
return dir;
}
bool
exists (const path & p)
{
return Glib::file_test (p.to_string(), Glib::FILE_TEST_EXISTS);
}
bool
exists_and_writable (const path & p)
{
/* writable() really reflects the whole folder, but if for any
reason the session state file can't be written to, still
make us unwritable.
*/
struct stat statbuf;
if (g_stat (p.to_string().c_str(), &statbuf) != 0) {
/* doesn't exist - not writable */
return false;
} else {
if (!(statbuf.st_mode & S_IWUSR)) {
/* exists and is not writable */
return false;
}
/* filesystem may be mounted read-only, so even though file
* permissions permit access, the mount status does not.
* access(2) seems like the best test for this.
*/
if (g_access (p.to_string().c_str(), W_OK) != 0) {
return false;
}
}
return true;
}
bool
is_directory (const path & p)
{
return Glib::file_test (p.to_string(), Glib::FILE_TEST_IS_DIR);
}
bool
create_directory(const path & p)
{
if(is_directory(p)) return false;
int error = g_mkdir (p.to_string().c_str(), S_IRWXU|S_IRWXG|S_IRWXO);
if(error == -1)
{
throw filesystem_error(g_strerror(errno), errno);
}
return true;
}
bool
create_directories(const path & p)
{
if(is_directory(p)) return false;
int error = g_mkdir_with_parents (p.to_string().c_str(), S_IRWXU|S_IRWXG|S_IRWXO);
if(error == -1)
{
throw filesystem_error(g_strerror(errno), errno);
}
return true;
}
bool
remove(const path & p)
{
if(!exists(p)) return false;
int error = g_unlink (p.to_string().c_str());
if(error == -1)
{
throw filesystem_error(g_strerror(errno), errno);
}
return true;
}
void
rename (const path & from_path, const path & to_path)
{
// g_rename is a macro that evaluates to ::rename on
// POSIX systems, without the global namespace qualifier
// it would evaluate to a recursive call(if it compiled)
if ( ::g_rename( from_path.to_string().c_str(),
to_path.to_string().c_str() ) == -1 )
{
throw filesystem_error(g_strerror(errno), errno);
}
}
string
basename (const path & p)
{
string base(p.leaf());
string::size_type n = base.rfind ('.');
return base.substr (0, n);
}
string
extension (const path & p)
{
string base(p.leaf());
string::size_type n = base.rfind ('.');
if (n != string::npos)
{
return base.substr(n);
}
return string();
}
std::string
get_absolute_path (const std::string & p)
{
Glib::RefPtr<Gio::File> f = Gio::File::create_for_path (p);
return f->get_path ();
}
bool
equivalent_paths (const std::string& a, const std::string& b)
{
struct stat bA;
int const rA = g_stat (a.c_str(), &bA);
struct stat bB;
int const rB = g_stat (b.c_str(), &bB);
return (rA == 0 && rB == 0 && bA.st_dev == bB.st_dev && bA.st_ino == bB.st_ino);
}
bool
path_is_within (std::string const & haystack, std::string needle)
{
while (1) {
if (equivalent_paths (haystack, needle)) {
return true;
}
needle = Glib::path_get_dirname (needle);
if (needle == "." || needle == "/") {
break;
}
}
return false;
}
} // namespace sys
} // namespace PBD
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