thin-provisioning-tools/caching/cache_dump.cc

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#include <fstream>
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#include <getopt.h>
#include <libgen.h>
#include <iostream>
#include "version.h"
#include "caching/mapping_array.h"
#include "caching/metadata.h"
#include "caching/metadata_dump.h"
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#include "caching/xml_format.h"
#include "persistent-data/file_utils.h"
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using namespace std;
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using namespace caching;
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//----------------------------------------------------------------
namespace {
struct flags {
flags()
: repair_(false) {
}
bool repair_;
};
//--------------------------------
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string const STDOUT_PATH("-");
bool want_stdout(string const &output) {
return output == STDOUT_PATH;
}
int dump(string const &dev, string const &output, flags const &fs) {
try {
block_manager<>::ptr bm = open_bm(dev, block_io<>::READ_ONLY);
metadata::ptr md(new metadata(bm, metadata::OPEN));
if (want_stdout(output)) {
emitter::ptr e = create_xml_emitter(cout);
metadata_dump(md, e, fs.repair_);
} else {
ofstream out(output.c_str());
emitter::ptr e = create_xml_emitter(out);
metadata_dump(md, e, fs.repair_);
}
} catch (std::exception &e) {
cerr << e.what() << endl;
return 1;
}
return 0;
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}
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void usage(ostream &out, string const &cmd) {
out << "Usage: " << cmd << " [options] {device|file}" << endl
<< "Options:" << endl
<< " {-h|--help}" << endl
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<< " {-o <xml file>}" << endl
<< " {-V|--version}" << endl
<< " {--repair}" << endl;
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}
}
//----------------------------------------------------------------
int main(int argc, char **argv)
{
int c;
flags fs;
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string output("-");
char const shortopts[] = "ho:V";
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option const longopts[] = {
{ "help", no_argument, NULL, 'h' },
{ "output", required_argument, NULL, 'o' },
{ "version", no_argument, NULL, 'V' },
{ "repair", no_argument, NULL, 1 },
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{ NULL, no_argument, NULL, 0 }
};
while ((c = getopt_long(argc, argv, shortopts, longopts, NULL)) != -1) {
switch(c) {
case 1:
fs.repair_ = true;
break;
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case 'h':
usage(cout, basename(argv[0]));
return 0;
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case 'o':
output = optarg;
break;
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case 'V':
cout << THIN_PROVISIONING_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;
}
return dump(argv[optind], output, fs);
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}
//----------------------------------------------------------------