13
0
livetrax/libs/pbd/file_utils.cc

296 lines
6.5 KiB
C++
Raw Normal View History

/*
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 <algorithm>
#include <vector>
#include <glib.h>
#include <glib/gstdio.h>
#include <glibmm/fileutils.h>
#include <glibmm/miscutils.h>
#include <glibmm/pattern.h>
#include <errno.h>
#include <string.h> /* strerror */
/* open() */
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
/* close(), read(), write() */
#ifdef COMPILER_MSVC
#include <io.h> // Microsoft's nearest equivalent to <unistd.h>
#else
#include <unistd.h>
#endif
#include "pbd/compose.h"
#include "pbd/file_utils.h"
#include "pbd/error.h"
#include "pbd/pathscanner.h"
#include "pbd/stl_delete.h"
#include "i18n.h"
using namespace std;
namespace PBD {
void
get_files_in_directory (const std::string& directory_path, vector<string>& result)
{
if (!Glib::file_test (directory_path, Glib::FILE_TEST_IS_DIR)) return;
try
{
Glib::Dir dir(directory_path);
std::copy(dir.begin(), dir.end(), std::back_inserter(result));
}
catch (Glib::FileError& err)
{
warning << err.what() << endmsg;
}
}
void
find_matching_files_in_directory (const std::string& directory,
const Glib::PatternSpec& pattern,
vector<std::string>& result)
{
vector<string> tmp_files;
get_files_in_directory (directory, tmp_files);
result.reserve(tmp_files.size());
for (vector<string>::iterator file_iter = tmp_files.begin();
file_iter != tmp_files.end();
++file_iter)
{
if (!pattern.match(*file_iter)) continue;
std::string full_path(directory);
full_path = Glib::build_filename (full_path, *file_iter);
result.push_back(full_path);
}
}
void
find_matching_files_in_directories (const vector<std::string>& paths,
const Glib::PatternSpec& pattern,
vector<std::string>& result)
{
for (vector<std::string>::const_iterator path_iter = paths.begin();
path_iter != paths.end();
++path_iter)
{
find_matching_files_in_directory (*path_iter, pattern, result);
}
}
void
find_matching_files_in_search_path (const SearchPath& search_path,
const Glib::PatternSpec& pattern,
vector<std::string>& result)
{
find_matching_files_in_directories (search_path, pattern, result);
}
bool
find_file_in_search_path(const SearchPath& search_path,
const string& filename,
std::string& result)
{
vector<std::string> tmp;
Glib::PatternSpec tmp_pattern(filename);
find_matching_files_in_search_path (search_path, tmp_pattern, tmp);
if (tmp.size() == 0)
{
return false;
}
#if 0
if (tmp.size() != 1)
{
info << string_compose
(
"Found more than one file matching %1 in search path %2",
filename,
search_path ()
)
<< endmsg;
}
#endif
result = tmp.front();
return true;
}
bool
copy_file(const std::string & from_path, const std::string & to_path)
{
if (!Glib::file_test (from_path, Glib::FILE_TEST_EXISTS)) return false;
int fd_from = -1;
int fd_to = -1;
char buf[4096]; // BUFSIZ ??
ssize_t nread;
fd_from = ::open(from_path.c_str(), O_RDONLY);
if (fd_from < 0) {
goto copy_error;
}
fd_to = ::open(to_path.c_str(), O_WRONLY | O_CREAT, 0666);
if (fd_to < 0) {
goto copy_error;
}
while (nread = ::read(fd_from, buf, sizeof(buf)), nread > 0) {
char *out_ptr = buf;
do {
ssize_t nwritten = ::write(fd_to, out_ptr, nread);
if (nwritten >= 0) {
nread -= nwritten;
out_ptr += nwritten;
} else if (errno != EINTR) {
goto copy_error;
}
} while (nread > 0);
}
if (nread == 0) {
if (::close(fd_to)) {
fd_to = -1;
goto copy_error;
}
::close(fd_from);
return true;
}
copy_error:
int saved_errno = errno;
if (fd_from >= 0) {
::close(fd_from);
}
if (fd_to >= 0) {
::close(fd_to);
}
error << string_compose (_("Unable to Copy file %1 to %2 (%3)"),
from_path, to_path, strerror(saved_errno))
<< endmsg;
return false;
}
static
bool accept_all_files (string const &, void *)
{
return true;
}
void
copy_files(const std::string & from_path, const std::string & to_dir)
{
PathScanner scanner;
vector<string*>* files = scanner (from_path, accept_all_files, 0, true, false);
if (files) {
for (vector<string*>::iterator i = files->begin(); i != files->end(); ++i) {
std::string from = Glib::build_filename (from_path, **i);
std::string to = Glib::build_filename (to_dir, **i);
copy_file (from, to);
}
vector_delete (files);
}
}
std::string
get_absolute_path (const std::string & p)
{
if (Glib::path_is_absolute(p)) return p;
return Glib::build_filename (Glib::get_current_dir(), p);
}
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;
}
bool
exists_and_writable (const std::string & 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.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.c_str(), W_OK) != 0) {
return false;
}
}
return true;
}
} // namespace PBD