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// Copyright (C) 2010-2014 David Sugar, Tycho Softworks.
// Copyright (C) 2015-2020 Cherokees of Idaho.
//
// This file is part of GNU uCommon C++.
//
// GNU uCommon C++ is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU uCommon C++ 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with GNU uCommon C++. If not, see <http://www.gnu.org/licenses/>.
#include <ucommon/secure.h>
#include <sys/stat.h>
using namespace ucommon;
static shell::flagopt helpflag('h',"--help", _TEXT("display this list"));
static shell::flagopt althelp('?', NULL, NULL);
static shell::stringopt hash('d', "--digest", _TEXT("digest method (md5)"), "method", "md5");
static shell::flagopt recursive('R', "--recursive", _TEXT("recursive directory scan"));
static shell::flagopt altrecursive('r', NULL, NULL);
static shell::flagopt hidden('s', "--hidden", _TEXT("show hidden files"));
static int exit_code = 0;
static const char *argv0 = "md";
static digest_t md;
static void result(const char *path, int code)
{
const char *err = _TEXT("i/o error");
switch(code) {
case EACCES:
case EPERM:
err = _TEXT("permission denied");
break;
case EROFS:
err = _TEXT("read-only file system");
break;
case ENODEV:
case ENOENT:
err = _TEXT("no such file or directory");
break;
case ENOTDIR:
err = _TEXT("not a directory");
break;
case ENOTEMPTY:
err = _TEXT("directory not empty");
break;
case ENOSPC:
err = _TEXT("no space left on device");
break;
case EBADF:
case ENAMETOOLONG:
err = _TEXT("bad file path");
break;
case EBUSY:
case EINPROGRESS:
err = _TEXT("file or directory busy");
break;
case EINTR:
err = _TEXT("operation interrupted");
break;
case EISDIR:
err = _TEXT("is a directory");
break;
#ifdef ELOOP
case ELOOP:
err = _TEXT("too many sym links");
break;
#endif
}
if(!code) {
if(!path)
path="-";
secure::string sum = *md;
shell::printf("%s %s\n", *sum, path);
return;
}
if(path)
shell::printf("%s: %s: %s\n", argv0, path, err);
else
shell::errexit(1, "*** %s: %s\n", argv0, err);
exit_code = 1;
}
static void digest(const char *path = NULL)
{
fsys_t fs;
fsys::fileinfo_t ino;
uint8_t buffer[1024];
if(path) {
int err = fsys::info(path, &ino);
if(err) {
result(path, err);
return;
}
if(fsys::is_sys(&ino)) {
result(path, EBADF);
return;
}
fs.open(path, fsys::STREAM);
}
else
fs.assign(shell::input());
if(!is(fs)) {
result(path, fs.err());
return;
}
for(;;) {
ssize_t size = fs.read(buffer, sizeof(buffer));
if(size < 1)
break;
md.put(buffer, size);
}
fs.close();
result(path, fs.err());
md.reset();
}
static void scan(String path, bool top = true)
{
char filename[128];
string_t filepath;
dir_t dir(path);
while(is(dir) && dir.read(filename, sizeof(filename))) {
if(*filename == '.' && (filename[1] == '.' || !filename[1]))
continue;
if(*filename == '.' && !is(hidden))
continue;
filepath = str(path) + str("/") + str(filename);
if(fsys::is_dir(filepath)) {
if(is(recursive) || is(altrecursive))
scan(filepath, false);
else
result(filepath, EISDIR);
}
else
digest(filepath);
}
}
int main(int argc, char **argv)
{
shell::bind("mdsum");
shell args(argc, argv);
argv0 = args.argv0();
unsigned count = 0;
argv0 = args.argv0();
if(is(helpflag) || is(althelp)) {
printf("%s\n", _TEXT("Usage: mdsum [options] path..."));
printf("%s\n\n", _TEXT("Compute digests for files"));
printf("%s\n", _TEXT("Options:"));
shell::help();
printf("\n%s\n", _TEXT("Report bugs to dyfet@gnu.org"));
return 0;
}
secure::init();
if(!Digest::has(*hash))
shell::errexit(2, "*** %s: %s: %s\n",
argv0, *hash, _TEXT("unknown or unsupported digest method"));
md = *hash;
// we can symlink md as md5, etc, to set alternate default digest names
if(!is(hash) && Digest::has(argv0))
md = argv0;
if(!args())
digest();
else while(count < args()) {
if(fsys::is_dir(args[count]))
scan(str(args[count++]));
else
digest(args[count++]);
}
return exit_code;
}
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