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/*
* Copyright © Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 or 3,
* as published by the Free Software Foundation.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <mir/test/popen.h>
#include <system_error>
namespace mt = mir::test;
mt::Popen::Popen(std::string const& cmd)
: raw_stream{popen(cmd.c_str(), "r"), [](FILE* f){ pclose(f); }}
{
if (!raw_stream)
throw std::system_error(errno, std::system_category(),
"popen failed for `"+cmd+"'");
}
bool mt::Popen::get_line(std::string& line)
{
FILE* in = raw_stream.get();
if (!in)
return false;
char* got = 0;
char buf[1024];
line.clear();
do
{
got = fgets(buf, sizeof buf, in);
if (got)
line.append(got);
} while (got && !feof(in) && !line.empty() && line.back() != '\n');
if (!line.empty() && line.back() == '\n')
line.pop_back();
return !line.empty() || !feof(in);
}
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