thin-provisioning-tools/caching/cache_check.cc
2013-08-16 14:07:04 +01:00

167 lines
3.7 KiB
C++

// Copyright (C) 2011 Red Hat, Inc. All rights reserved.
//
// This file is part of the thin-provisioning-tools source.
//
// thin-provisioning-tools 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 3 of
// the License, or (at your option) any later version.
//
// thin-provisioning-tools 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 thin-provisioning-tools. If not, see
// <http://www.gnu.org/licenses/>.
#include <iostream>
#include <sstream>
#include <string>
#include <stdexcept>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <libgen.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
using namespace std;
//----------------------------------------------------------------
namespace {
struct stat guarded_stat(string const &path) {
struct stat info;
int r = ::stat(path.c_str(), &info);
if (r) {
ostringstream msg;
char buffer[128], *ptr;
ptr = ::strerror_r(errno, buffer, sizeof(buffer));
msg << path << ": " << ptr;
throw runtime_error(msg.str());
}
return info;
}
int open_file(string const &path, int mode) {
int fd = open(path.c_str(), mode);
if (fd < 0) {
ostringstream msg;
char buffer[128], *ptr;
ptr = strerror_r(errno, buffer, sizeof(buffer));
msg << path << ": " << ptr;
throw runtime_error(msg.str());
}
return fd;
}
int check(string const &path, bool quiet) {
struct stat info = guarded_stat(path);
if (!S_ISREG(info.st_mode) && !S_ISBLK(info.st_mode)) {
ostringstream msg;
msg << path << ": " << "Not a block device or regular file";
throw runtime_error(msg.str());
}
int fd = open_file(path, O_RDONLY);
ostringstream msg;
msg << path << ": " << "No superblock found";
throw runtime_error(msg.str());
return 0;
#if 0
try {
metadata::ptr md(new metadata(path, metadata::OPEN));
optional<error_set::ptr> maybe_errors = metadata_check(md);
if (maybe_errors) {
if (!quiet)
cerr << error_selector(*maybe_errors, 3);
return 1;
}
} catch (std::exception &e) {
if (!quiet)
cerr << e.what() << endl;
return 1;
}
return 0;
#endif
}
void usage(ostream &out, string const &cmd) {
out << "Usage: " << cmd << " [options] {device|file}" << endl
<< "Options:" << endl
<< " {-q|--quiet}" << endl
<< " {-h|--help}" << endl
<< " {-V|--version}" << endl;
}
char const *TOOLS_VERSION = "0.1.6";
}
//----------------------------------------------------------------
int main(int argc, char **argv)
{
int c;
bool quiet = false;
const char shortopts[] = "qhV";
const struct option longopts[] = {
{ "quiet", no_argument, NULL, 'q'},
{ "help", no_argument, NULL, 'h'},
{ "version", no_argument, NULL, 'V'},
{ NULL, no_argument, NULL, 0 }
};
while ((c = getopt_long(argc, argv, shortopts, longopts, NULL)) != -1) {
switch(c) {
case 'h':
usage(cout, basename(argv[0]));
return 0;
case 'q':
quiet = true;
break;
case 'V':
cout << TOOLS_VERSION << endl;
return 0;
default:
usage(cerr, basename(argv[0]));
return 1;
}
}
if (argc == optind) {
cerr << "No input file provided." << endl;
usage(cerr, basename(argv[0]));
return 1;
}
try {
check(argv[optind], quiet);
} catch (exception const &e) {
cerr << e.what() << endl;
return 1;
}
return 0;
}
//----------------------------------------------------------------