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/**
* Copyright (C) 2001-2021 Artifex Software, Inc.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
**/
#define STRICT
#include <windows.h>
#include <io.h>
#include <process.h>
#include <fcntl.h>
#include "ijs.h"
#include "ijs_client.h"
/* Start child program with redirected standard input and output */
int
ijs_exec_server(const char *server_cmd, int *pfd_to, int *pfd_from,
int *pchild_pid)
{
SECURITY_ATTRIBUTES saAttr;
STARTUPINFO siStartInfo;
LPVOID env;
HANDLE hPipeTemp;
HANDLE hChildStdinRd = INVALID_HANDLE_VALUE;
HANDLE hChildStdinWr = INVALID_HANDLE_VALUE;
HANDLE hChildStdoutRd = INVALID_HANDLE_VALUE;
HANDLE hChildStdoutWr = INVALID_HANDLE_VALUE;
PROCESS_INFORMATION piProcInfo;
BOOL flag;
int fd_stdin_wr = -1;
int fd_stdout_rd = -1;
/* Set the bInheritHandle flag so pipe handles are inherited. */
saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
saAttr.bInheritHandle = TRUE;
saAttr.lpSecurityDescriptor = NULL;
/* Create anonymous inheritable pipes for STDIN and STDOUT
* for child. For each pipe, create a noninheritable duplicate handle
* of our end of the pipe, then close the inheritable handle.
* Do not redirect STDERR.
*/
flag = CreatePipe(&hChildStdinRd, &hPipeTemp, &saAttr, 0);
if (flag) {
flag = DuplicateHandle(GetCurrentProcess(), hPipeTemp,
GetCurrentProcess(), &hChildStdinWr, 0,
FALSE, /* not inherited */
DUPLICATE_SAME_ACCESS);
CloseHandle(hPipeTemp);
}
if (flag)
flag = CreatePipe(&hPipeTemp, &hChildStdoutWr, &saAttr, 0);
if (flag) {
flag = DuplicateHandle(GetCurrentProcess(), hPipeTemp,
GetCurrentProcess(), &hChildStdoutRd, 0,
FALSE, /* not inherited */
DUPLICATE_SAME_ACCESS);
CloseHandle(hPipeTemp);
}
if (flag)
flag = (fd_stdin_wr = _open_osfhandle((intptr_t)hChildStdinWr, _O_BINARY)) != -1;
if (flag)
flag = (fd_stdout_rd = _open_osfhandle((intptr_t)hChildStdoutRd, _O_BINARY)) != -1;
/* Now create the child process. */
if (flag) {
/* Set up members of STARTUPINFO structure. */
siStartInfo.cb = sizeof(STARTUPINFO);
siStartInfo.lpReserved = NULL;
siStartInfo.lpDesktop = NULL;
siStartInfo.lpTitle = NULL; /* use executable name as title */
siStartInfo.dwX = siStartInfo.dwY = CW_USEDEFAULT; /* ignored */
siStartInfo.dwXSize = siStartInfo.dwYSize = CW_USEDEFAULT;/* ignored */
siStartInfo.dwXCountChars = 80;
siStartInfo.dwYCountChars = 25;
siStartInfo.dwFillAttribute = 0; /* ignored */
siStartInfo.dwFlags = STARTF_USESTDHANDLES;
#ifdef VERBOSE
siStartInfo.wShowWindow = SW_SHOWNORMAL;
siStartInfo.dwFlags |= STARTF_USESHOWWINDOW;
#else
siStartInfo.wShowWindow = SW_HIDE;
#endif
siStartInfo.cbReserved2 = 0;
siStartInfo.lpReserved2 = NULL;
siStartInfo.hStdInput = hChildStdinRd;
siStartInfo.hStdOutput = hChildStdoutWr;
siStartInfo.hStdError = GetStdHandle(STD_ERROR_HANDLE);
env = NULL;
/* Create the child process. */
flag = CreateProcess(server_cmd,
NULL, /* command line */
NULL, /* process security attributes */
NULL, /* primary thread security attributes */
TRUE, /* handles are inherited */
0, /* creation flags */
env, /* environment */
NULL, /* use parent's current directory */
&siStartInfo, /* STARTUPINFO pointer */
&piProcInfo); /* receives PROCESS_INFORMATION */
if (flag) {
CloseHandle(piProcInfo.hProcess);
CloseHandle(piProcInfo.hThread);
}
}
if (hChildStdinRd != INVALID_HANDLE_VALUE)
CloseHandle(hChildStdinRd);
if (hChildStdoutWr != INVALID_HANDLE_VALUE)
CloseHandle(hChildStdoutWr);
if (flag) {
*pfd_to = fd_stdin_wr;
*pfd_from = fd_stdout_rd;
*pchild_pid = (int)piProcInfo.dwProcessId;
}
else {
if (fd_stdin_wr != -1)
close(fd_stdin_wr);
else if (hChildStdinWr != INVALID_HANDLE_VALUE)
CloseHandle(hChildStdinWr);
if (fd_stdout_rd != -1)
close(fd_stdout_rd);
else if (hChildStdoutRd != INVALID_HANDLE_VALUE)
CloseHandle(hChildStdoutRd);
return -1;
}
return flag ? 0 : -1;
}
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