void
CPCD::Process::do_exec() {
unsigned i;
#ifdef _WIN32
Vector<BaseString> saved;
char *cwd = 0;
save_environment(m_env.c_str(), saved);
#endif
setup_environment(m_env.c_str());
char **argv = BaseString::argify(m_path.c_str(), m_args.c_str());
if(strlen(m_cwd.c_str()) > 0) {
#ifdef _WIN32
cwd = getcwd(0, 0);
if(!cwd)
{
logger.critical("Couldn't getcwd before spawn");
}
#endif
int err = chdir(m_cwd.c_str());
if(err == -1) {
BaseString err;
logger.error("%s: %s\n", m_cwd.c_str(), strerror(errno));
_exit(1);
}
}
#ifndef _WIN32
Vector<BaseString> ulimit;
m_ulimit.split(ulimit);
for(i = 0; i<ulimit.size(); i++){
if(ulimit[i].trim().length() > 0 && set_ulimit(ulimit[i]) != 0){
_exit(1);
}
}
#endif
const char *nul = IF_WIN("nul:", "/dev/null");
int fdnull = open(nul, O_RDWR, 0);
if(fdnull == -1) {
logger.error("Cannot open `%s': %s\n", nul, strerror(errno));
_exit(1);
}
BaseString * redirects[] = { &m_stdin, &m_stdout, &m_stderr };
int fds[3];
#ifdef _WIN32
int std_dups[3];
#endif
for (i = 0; i < 3; i++) {
#ifdef _WIN32
std_dups[i] = dup(i);
#endif
if (redirects[i]->empty()) {
#ifndef DEBUG
dup2(fdnull, i);
#endif
continue;
}
if((* redirects[i]) == "2>&1" && i == 2){
dup2(fds[1], 2);
continue;
}
/**
* Make file
*/
int flags = 0;
int mode = S_IRUSR | S_IWUSR ;
if(i == 0){
flags |= O_RDONLY;
} else {
flags |= O_WRONLY | O_CREAT | O_APPEND;
}
int f = fds[i]= open(redirects[i]->c_str(), flags, mode);
if(f == -1){
logger.error("Cannot redirect %u to/from '%s' : %s\n", i,
redirects[i]->c_str(), strerror(errno));
_exit(1);
}
dup2(f, i);
#ifdef _WIN32
close(f);
#endif
}
#ifndef _WIN32
/* Close all filedescriptors */
for(i = STDERR_FILENO+1; (int)i < getdtablesize(); i++)
close(i);
execv(m_path.c_str(), argv);
/* XXX If we reach this point, an error has occurred, but it's kind of hard
* to report it, because we've closed all files... So we should probably
* create a new logger here */
logger.error("Exec failed: %s\n", strerror(errno));
/* NOTREACHED */
#else
// Get full path to cygwins shell
FILE *fpipe = _popen("sh -c 'cygpath -w `which sh`'", "rt");
char buf[MAX_PATH];
require(fgets(buf, MAX_PATH - 1, fpipe));
fclose(fpipe);
BaseString sh;
sh.assign(buf);
sh.trim("\n");
sh.append(".exe");
BaseString shcmd;
shcmd.assfmt("%s -c '%s %s'", sh.c_str(), m_path.c_str(), m_args.c_str());
PROCESS_INFORMATION pi = {0};
STARTUPINFO si = {sizeof(STARTUPINFO), 0};
si.dwFlags |= STARTF_USESTDHANDLES;
si.hStdInput = (HANDLE)_get_osfhandle(0);
si.hStdOutput = (HANDLE)_get_osfhandle(1);
si.hStdError = (HANDLE)_get_osfhandle(2);
if(!CreateProcessA(sh.c_str(),
(LPSTR)shcmd.c_str(),
NULL,
NULL,
TRUE,
CREATE_SUSPENDED, // Resumed after assigned to Job
NULL,
NULL,
&si,
&pi))
{
char* message;
DWORD err = GetLastError();
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
err,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR)&message,
0, NULL );
logger.error("CreateProcess failed, error: %d, message: '%s'",
err, message);
LocalFree(message);
}
HANDLE proc = pi.hProcess;
require(proc);
// Job control
require(m_job = CreateJobObject(0, 0));
require(AssignProcessToJobObject(m_job, proc));
// Resum process after it has been added to Job
ResumeThread(pi.hThread);
CloseHandle(pi.hThread);
// go back up to original cwd
if(chdir(cwd))
{
logger.critical("Couldn't go back to saved cwd after spawn()");
logger.critical("errno: %d, strerror: %s", errno, strerror(errno));
}
free(cwd);
// get back to original std i/o
for(i = 0; i < 3; i++) {
dup2(std_dups[i], i);
close(std_dups[i]);
}
for (i = 0; i < saved.size(); i++) {
putenv(saved[i].c_str());
}
logger.debug("'%s' has been started", shcmd.c_str());
DWORD exitcode;
BOOL result = GetExitCodeProcess(proc, &exitcode);
//maybe a short running process
if (result && exitcode != 259) {
m_status = STOPPED;
logger.warning("Process terminated early");
}
int pid = GetProcessId(proc);
if (!pid)
logger.critical("GetProcessId failed, error: %d!", GetLastError());
logger.debug("new pid %d", pid);
CloseHandle(proc);
m_status = RUNNING;
writePid(pid);
#endif
close(fdnull);
}
