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/*****************************************************************************
*
* X testing environment - Google Test environment feat. dummy x server
*
* Copyright (C) 2011 Canonical Ltd.
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
****************************************************************************/
#include "xorg/gtest/process.h"
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <algorithm>
#include <cerrno>
#include <csignal>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <stdexcept>
#include <vector>
struct xorg::testing::Process::Private {
pid_t pid;
};
xorg::testing::Process::Process() : d_(new Private) {
d_->pid = -1;
}
void xorg::testing::Process::Start(const std::string& program, va_list args) {
if (d_->pid != -1)
throw std::runtime_error("Attempting to start an already started process");
d_->pid = vfork();
if (d_->pid == -1) {
throw std::runtime_error("Failed to fork child process");
} else if (d_->pid == 0) { /* Child */
close(0);
close(1);
close(2);
std::vector<char*> argv;
do
argv.push_back(va_arg(args, char*));
while (argv.back());
execvp(program.c_str(), &argv[0]);
throw std::runtime_error("Failed to start process");
}
}
void xorg::testing::Process::Start(const std::string& program, ...) {
va_list list;
va_start(list, program);
Start(program, list);
va_end(list); /* Shouldn't get here */
}
bool xorg::testing::Process::Terminate() {
if (d_->pid == -1) {
return false;
} else if (d_->pid == 0) {
/* Child */
throw std::runtime_error("Child process tried to terminate itself");
} else { /* Parent */
if (kill(d_->pid, SIGTERM) < 0) {
d_->pid = -1;
return false;
}
d_->pid = -1;
}
return true;
}
bool xorg::testing::Process::Kill() {
if (d_->pid == -1) {
return false;
} else if (d_->pid == 0) {
/* Child */
throw std::runtime_error("Child process tried to kill itself");
} else { /* Parent */
if (kill(d_->pid, SIGKILL) < 0) {
d_->pid = -1;
return false;
}
d_->pid = -1;
}
return true;
}
void xorg::testing::Process::SetEnv(const std::string& name,
const std::string& value, bool overwrite) {
if (setenv(name.c_str(), value.c_str(), overwrite) != 0)
throw std::runtime_error("Failed to set environment variable in process");
return;
}
std::string xorg::testing::Process::GetEnv(const std::string& name,
bool* exists) {
const char* var = getenv(name.c_str());
if (exists != NULL)
*exists = (var != NULL);
return std::string(var);
}
pid_t xorg::testing::Process::Pid() const {
return d_->pid;
}
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