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Diffstat (limited to 'tools/windows/process.c')
| -rw-r--r-- | tools/windows/process.c | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/tools/windows/process.c b/tools/windows/process.c new file mode 100644 index 0000000..9a0b893 --- /dev/null +++ b/tools/windows/process.c @@ -0,0 +1,204 @@ +/* + * ***** 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 retrieving 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"); + + 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; +} |