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/*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and
* limitations under the License.
*
* The Original Code is librabbitmq.
*
* The Initial Developers of the Original Code are LShift Ltd, Cohesive
* Financial Technologies LLC, and Rabbit Technologies Ltd. Portions
* created before 22-Nov-2008 00:00:00 GMT by LShift Ltd, Cohesive
* Financial Technologies LLC, or Rabbit Technologies Ltd are Copyright
* (C) 2007-2008 LShift Ltd, Cohesive Financial Technologies LLC, and
* Rabbit Technologies Ltd.
*
* Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
* Ltd. Portions created by Cohesive Financial Technologies LLC are
* Copyright (C) 2007-2010 Cohesive Financial Technologies
* LLC. Portions created by Rabbit Technologies Ltd are Copyright (C)
* 2007-2010 Rabbit Technologies Ltd.
*
* Portions created by Tony Garnock-Jones are Copyright (C) 2009-2010
* LShift Ltd and Tony Garnock-Jones.
*
* All Rights Reserved.
*
* Contributor(s): ______________________________________.
*
* Alternatively, the contents of this file may be used under the terms
* of the GNU General Public License Version 2 or later (the "GPL"), in
* which case the provisions of the GPL are applicable instead of those
* above. If you wish to allow use of your version of this file only
* under the terms of the GPL, and not to allow others to use your
* version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the
* notice and other provisions required by the GPL. If you do not
* delete the provisions above, a recipient may use your version of
* this file under the terms of any one of the MPL or the GPL.
*
* ***** END LICENSE BLOCK *****
*/
#include <stdio.h>
#include <io.h>
#include <windows.h>
#include "common.h"
#include "process.h"
void die_windows_error(const char *fmt, ...)
{
char *msg;
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
if (!FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM
| FORMAT_MESSAGE_ALLOCATE_BUFFER,
NULL, GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPSTR)&msg, 0, NULL))
msg = "(failed to retrieve Windows error message)";
fprintf(stderr, ": %s\n", msg);
exit(1);
}
static char *make_command_line(const char *const *argv)
{
int i;
size_t len = 1; /* initial quotes */
char *buf;
char *dest;
/* calculate the length of the required buffer, making worst
case assumptions for simplicity */
for (i = 0;;) {
len += strlen(argv[i]) * 2;
if (!argv[++i])
break;
len += 3; /* quotes, space, quotes */
}
len += 2; /* final quotes and the terminating zero */
dest = buf = malloc(len);
if (!buf)
die("allocating memory for subprocess command line");
*dest++ = '\"';
for (i = 0;;) {
const char *src = argv[i];
for (;;) {
switch (*src) {
case 0:
goto done;
case '\"':
case '\\':
*dest++ = '\\';
/* fall through */
default:
*dest++ = *src++;
break;
}
}
done:
if (!argv[++i])
break;
*dest++ = '\"';
*dest++ = ' ';
*dest++ = '\"';
}
*dest++ = '\"';
*dest++ = 0;
return buf;
}
void pipeline(const char *const *argv, struct pipeline *pl)
{
HANDLE in_read_handle, in_write_handle;
SECURITY_ATTRIBUTES sec_attr;
PROCESS_INFORMATION proc_info;
STARTUPINFO start_info;
char *cmdline = make_command_line(argv);
sec_attr.nLength = sizeof sec_attr;
sec_attr.bInheritHandle = TRUE;
sec_attr.lpSecurityDescriptor = NULL;
if (!CreatePipe(&in_read_handle, &in_write_handle, &sec_attr, 0))
die_windows_error("CreatePipe");
if (!SetHandleInformation(in_write_handle, HANDLE_FLAG_INHERIT, 0))
die_windows_error("SetHandleInformation");
/* when in Rome... */
ZeroMemory(&proc_info, sizeof proc_info);
ZeroMemory(&start_info, sizeof start_info);
start_info.cb = sizeof start_info;
start_info.dwFlags |= STARTF_USESTDHANDLES;
if ((start_info.hStdError = GetStdHandle(STD_ERROR_HANDLE))
== INVALID_HANDLE_VALUE
|| (start_info.hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE))
== INVALID_HANDLE_VALUE)
die_windows_error("GetStdHandle");
start_info.hStdInput = in_read_handle;
if (!CreateProcess(NULL, cmdline, NULL, NULL, TRUE, 0,
NULL, NULL, &start_info, &proc_info))
die_windows_error("CreateProcess");
free(cmdline);
if (!CloseHandle(proc_info.hThread))
die_windows_error("CloseHandle for thread");
if (!CloseHandle(in_read_handle))
die_windows_error("CloseHandle");
pl->proc_handle = proc_info.hProcess;
pl->infd = _open_osfhandle((intptr_t)in_write_handle, 0);
}
int finish_pipeline(struct pipeline *pl)
{
DWORD code;
if (close(pl->infd))
die_errno(errno, "close");
for (;;) {
if (!GetExitCodeProcess(pl->proc_handle, &code))
die_windows_error("GetExitCodeProcess");
if (code != STILL_ACTIVE)
break;
if (WaitForSingleObject(pl->proc_handle, INFINITE)
== WAIT_FAILED)
die_windows_error("WaitForSingleObject");
}
if (!CloseHandle(pl->proc_handle))
die_windows_error("CloseHandle for process");
return code;
}
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