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process.c

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/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
*
* 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.
*/
#include "uv.h"
#include "../uv-common.h"
#include "internal.h"
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#include <stdio.h>
#include <assert.h>
#include <stdlib.h>
#include <windows.h>
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typedef struct env_var {
const char* narrow;
const wchar_t* wide;
int len; /* including null or '=' */
int supplied;
int value_len;
} env_var_t;
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#define E_V(str) { str "=", L##str, sizeof(str), 0, 0 }
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#define UTF8_TO_UTF16(s, t) \
size = uv_utf8_to_utf16(s, NULL, 0) * sizeof(wchar_t); \
t = (wchar_t*)malloc(size); \
if (!t) { \
uv_fatal_error(ERROR_OUTOFMEMORY, "malloc"); \
} \
if (!uv_utf8_to_utf16(s, t, size / sizeof(wchar_t))) { \
uv_set_sys_error(GetLastError()); \
err = -1; \
goto done; \
}
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static const wchar_t DEFAULT_PATH_EXT[10] = L".COM;.EXE";
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static void uv_process_init(uv_process_t* handle) {
handle->type = UV_PROCESS;
handle->flags = 0;
handle->error = uv_ok_;
handle->exit_cb = NULL;
handle->pid = 0;
handle->exit_signal = 0;
handle->wait_handle = INVALID_HANDLE_VALUE;
handle->process_handle = INVALID_HANDLE_VALUE;
handle->close_handle = INVALID_HANDLE_VALUE;
handle->stdio_pipes[0].server_pipe = NULL;
handle->stdio_pipes[0].child_pipe = INVALID_HANDLE_VALUE;
handle->stdio_pipes[1].server_pipe = NULL;
handle->stdio_pipes[1].child_pipe = INVALID_HANDLE_VALUE;
handle->stdio_pipes[2].server_pipe = NULL;
handle->stdio_pipes[2].child_pipe = INVALID_HANDLE_VALUE;
uv_req_init((uv_req_t*)&handle->exit_req);
handle->exit_req.type = UV_PROCESS_EXIT;
handle->exit_req.data = handle;
uv_req_init((uv_req_t*)&handle->close_req);
handle->close_req.type = UV_PROCESS_CLOSE;
handle->close_req.data = handle;
uv_counters()->handle_init++;
uv_counters()->process_init++;
uv_ref();
}
/*
* Path search functions
*/
/*
* Helper function for search_path
*/
static wchar_t* search_path_join_test(const wchar_t* dir,
int dir_len,
const wchar_t* name,
int name_len,
const wchar_t* ext,
int ext_len,
const wchar_t* cwd,
int cwd_len) {
wchar_t *result, *result_pos;
DWORD attrs;
if (dir_len >= 1 && (dir[0] == L'/' || dir[0] == L'\\')) {
/* It's a full path without drive letter, use cwd's drive letter only */
cwd_len = 2;
} else if (dir_len >= 2 && dir[1] == L':' &&
(dir_len < 3 || (dir[2] != L'/' && dir[2] != L'\\'))) {
/* It's a relative path with drive letter (ext.g. D:../some/file)
* Replace drive letter in dir by full cwd if it points to the same drive,
* otherwise use the dir only.
*/
if (cwd_len < 2 || _wcsnicmp(cwd, dir, 2) != 0) {
cwd_len = 0;
} else {
dir += 2;
dir_len -= 2;
}
} else if (dir_len > 2 && dir[1] == L':') {
/* It's an absolute path with drive letter
* Don't use the cwd at all
*/
cwd_len = 0;
}
/* Allocate buffer for output */
result = result_pos =
(wchar_t*)malloc(sizeof(wchar_t) * (cwd_len + 1 + dir_len + 1 + name_len + 1 + ext_len + 1));
/* Copy cwd */
wcsncpy(result_pos, cwd, cwd_len);
result_pos += cwd_len;
/* Add a path separator if cwd didn't end with one */
if (cwd_len && wcsrchr(L"\\/:", result_pos[-1]) == NULL) {
result_pos[0] = L'\\';
result_pos++;
}
/* Copy dir */
wcsncpy(result_pos, dir, dir_len);
result_pos += dir_len;
/* Add a separator if the dir didn't end with one */
if (dir_len && wcsrchr(L"\\/:", result_pos[-1]) == NULL) {
result_pos[0] = L'\\';
result_pos++;
}
/* Copy filename */
wcsncpy(result_pos, name, name_len);
result_pos += name_len;
/* Copy extension */
if (ext_len) {
result_pos[0] = L'.';
result_pos++;
wcsncpy(result_pos, ext, ext_len);
result_pos += ext_len;
}
/* Null terminator */
result_pos[0] = L'\0';
attrs = GetFileAttributesW(result);
if (attrs != INVALID_FILE_ATTRIBUTES &&
!(attrs & (FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_REPARSE_POINT))) {
return result;
}
free(result);
return NULL;
}
/*
* Helper function for search_path
*/
static wchar_t* path_search_walk_ext(const wchar_t *dir,
int dir_len,
const wchar_t *name,
int name_len,
wchar_t *cwd,
int cwd_len,
const wchar_t *path_ext,
int name_has_ext) {
wchar_t* result = NULL;
const wchar_t *ext_start,
*ext_end = path_ext;
/* If the name itself has a nonemtpy extension, try this extension first */
if (name_has_ext) {
result = search_path_join_test(dir, dir_len,
name, name_len,
L"", 0,
cwd, cwd_len);
}
/* Add path_ext extensions and try to find a name that matches */
while (result == NULL) {
if (*ext_end == L'\0') {
break;
}
/* Skip the separator that ext_end now points to */
if (ext_end != path_ext) {
ext_end++;
}
/* Find the next dot in path_ext */
ext_start = wcschr(ext_end, L'.');
if (ext_start == NULL) {
break;
}
/* Skip the dot */
ext_start++;
/* Slice until we found a ; or alternatively a \0 */
ext_end = wcschr(ext_start, L';');
if (ext_end == NULL) {
ext_end = wcschr(ext_start, '\0');
}
result = search_path_join_test(dir, dir_len,
name, name_len,
ext_start, (ext_end - ext_start),
cwd, cwd_len);
}
return result;
}
/*
* search_path searches the system path for an executable filename -
* the windows API doesn't provide this as a standalone function nor as an
* option to CreateProcess.
*
* It tries to return an absolute filename.
*
* Furthermore, it tries to follow the semantics that cmd.exe uses as closely
* as possible:
*
* - Do not search the path if the filename already contains a path (either
* relative or absolute).
* (but do use path_ext)
*
* - If there's really only a filename, check the current directory for file,
* then search all path directories.
*
* - If filename specifies has *any* extension, search for the file with the
* specified extension first.
* (not necessary an executable one or one that appears in path_ext;
* *but* no extension or just a dot is *not* allowed)
*
* - If the literal filename is not found in a directory, try *appending*
* (not replacing) extensions from path_ext in the specified order.
* (an extension consisting of just a dot *may* appear in path_ext;
* unlike what happens if the specified filename ends with a dot,
* if path_ext specifies a single dot cmd.exe *does* look for an
* extension-less file)
*
* - The path variable may contain relative paths; relative paths are relative
* to the cwd.
*
* - Directories in path may or may not end with a trailing backslash.
*
* - Extensions path_ext portions must always start with a dot.
*
* - CMD does not trim leading/trailing whitespace from path/pathex entries
* nor from the environment variables as a whole.
*
* - When cmd.exe cannot read a directory, it wil just skip it and go on
* searching. However, unlike posix-y systems, it will happily try to run a
* file that is not readable/executable; if the spawn fails it will not
* continue searching.
*
* TODO: correctly interpret UNC paths
* TODO: check with cmd what should happen when a pathext entry does not start
* with a dot
*/
static wchar_t* search_path(const wchar_t *file,
wchar_t *cwd,
const wchar_t *path,
const wchar_t *path_ext) {
int file_has_dir;
wchar_t* result = NULL;
wchar_t *file_name_start;
wchar_t *dot;
int name_has_ext;
int file_len = wcslen(file);
int cwd_len = wcslen(cwd);
/* If the caller supplies an empty filename,
* we're not gonna return c:\windows\.exe -- GFY!
*/
if (file_len == 0
|| (file_len == 1 && file[0] == L'.')) {
return NULL;
}
/* Find the start of the filename so we can split the directory from the name */
for (file_name_start = (wchar_t*)file + file_len;
file_name_start > file
&& file_name_start[-1] != L'\\'
&& file_name_start[-1] != L'/'
&& file_name_start[-1] != L':';
file_name_start--);
file_has_dir = file_name_start != file;
/* Check if the filename includes an extension */
dot = wcschr(file_name_start, L'.');
name_has_ext = (dot != NULL && dot[1] != L'\0');
if (file_has_dir) {
/* The file has a path inside, don't use path (but do use path_ex) */
result = path_search_walk_ext(
file, file_name_start - file,
file_name_start, file_len - (file_name_start - file),
cwd, cwd_len,
path_ext, name_has_ext);
} else {
const wchar_t *dir_start,
*dir_end = path;
/* The file is really only a name; look in cwd first, then scan path */
result = path_search_walk_ext(L"", 0,
file, file_len,
cwd, cwd_len,
path_ext, name_has_ext);
while (result == NULL) {
if (*dir_end == L'\0') {
break;
}
/* Skip the separator that dir_end now points to */
if (dir_end != path) {
dir_end++;
}
/* Next slice starts just after where the previous one ended */
dir_start = dir_end;
/* Slice until the next ; or \0 is found */
dir_end = wcschr(dir_start, L';');
if (dir_end == NULL) {
dir_end = wcschr(dir_start, L'\0');
}
/* If the slice is zero-length, don't bother */
if (dir_end - dir_start == 0) {
continue;
}
result = path_search_walk_ext(dir_start, dir_end - dir_start,
file, file_len,
cwd, cwd_len,
path_ext, name_has_ext);
}
}
return result;
}
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/*
* Quotes command line arguments
* Returns a pointer to the end (next char to be written) of the buffer
*/
wchar_t* quote_cmd_arg(const wchar_t *source, wchar_t *target) {
int len = wcslen(source),
i, quote_hit;
wchar_t* start;
/*
* Check if the string must be quoted;
* if unnecessary, don't do it, it may only confuse older programs.
*/
if (len == 0) {
return target;
}
if (NULL == wcspbrk(source, L" \t\"")) {
/* No quotation needed */
wcsncpy(target, source, len);
target += len;
return target;
}
if (NULL == wcspbrk(source, L"\"\\")) {
/*
* No embedded double quotes or backlashes, so I can just wrap
* quote marks around the whole thing.
*/
*(target++) = L'"';
wcsncpy(target, source, len);
target += len;
*(target++) = L'"';
return target;
}
/*
* Expected intput/output:
* input : hello"world
* output: "hello\"world"
* input : hello""world
* output: "hello\"\"world"
* input : hello\world
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* output: hello\world
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* input : hello\\world
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* output: hello\\world
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* input : hello\"world
* output: "hello\\\"world"
* input : hello\\"world
* output: "hello\\\\\"world"
* input : hello world\
* output: "hello world\"
*/
*(target++) = L'"';
start = target;
quote_hit = 1;
for (i = len; i > 0; --i) {
*(target++) = source[i - 1];
if (quote_hit && source[i - 1] == L'\\') {
*(target++) = L'\\';
} else if(source[i - 1] == L'"') {
quote_hit = 1;
*(target++) = L'\\';
} else {
quote_hit = 0;
}
}
target[0] = L'\0';
wcsrev(start);
*(target++) = L'"';
return target;
}
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wchar_t* make_program_args(char** args, int verbatim_arguments) {
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wchar_t* dst;
wchar_t* ptr;
char** arg;
size_t size = 0;
size_t len;
int arg_count = 0;
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wchar_t* buffer;
int arg_size;
int buffer_size = 0;
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/* Count the required size. */
for (arg = args; *arg; arg++) {
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arg_size = uv_utf8_to_utf16(*arg, NULL, 0) * sizeof(wchar_t);
size += arg_size;
buffer_size = arg_size > buffer_size ? arg_size : buffer_size;
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arg_count++;
}
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/* Adjust for potential quotes. Also assume the worst-case scenario
/* that every character needs escaping, so we need twice as much space. */
size = size * 2 + arg_count * 2;
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dst = (wchar_t*)malloc(size);
if (!dst) {
uv_fatal_error(ERROR_OUTOFMEMORY, "malloc");
}
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buffer = (wchar_t*)malloc(buffer_size);
if (!buffer) {
uv_fatal_error(ERROR_OUTOFMEMORY, "malloc");
}
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ptr = dst;
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for (arg = args; *arg; arg++) {
len = uv_utf8_to_utf16(*arg, buffer, (size_t)(size - (ptr - dst)));
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if (!len) {
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goto error;
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}
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if (verbatim_arguments) {
wcscpy(ptr, buffer);
ptr += len - 1;
} else {
ptr = quote_cmd_arg(buffer, ptr);
}
*ptr++ = *(arg + 1) ? L' ' : L'\0';
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}
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free(buffer);
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return dst;
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error:
free(dst);
free(buffer);
return NULL;
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}
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/*
* If we learn that people are passing in huge environment blocks
* then we should probably qsort() the array and then bsearch()
* to see if it contains this variable. But there are ownership
* issues associated with that solution; this is the caller's
* char**, and modifying it is rude.
*/
static void check_required_vars_contains_var(env_var_t* required, int size, const char* var) {
int i;
for (i = 0; i < size; ++i) {
if (_strnicmp(required[i].narrow, var, required[i].len) == 0) {
required[i].supplied = 1;
return;
}
}
}
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/*
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* The way windows takes environment variables is different than what C does;
* Windows wants a contiguous block of null-terminated strings, terminated
* with an additional null.
*
* Windows has a few "essential" environment variables. winsock will fail
* to initialize if SYSTEMROOT is not defined; some APIs make reference to
* TEMP. SYSTEMDRIVE is probably also important. We therefore ensure that
* these get defined if the input environment block does not contain any
* values for them.
*/
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wchar_t* make_program_env(char** env_block) {
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wchar_t* dst;
wchar_t* ptr;
char** env;
int env_len = 1 * sizeof(wchar_t); /* room for closing null */
int len;
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int i;
DWORD var_size;
env_var_t required_vars[] = {
E_V("SYSTEMROOT"),
E_V("SYSTEMDRIVE"),
E_V("TEMP"),
};
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for (env = env_block; *env; env++) {
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check_required_vars_contains_var(required_vars, COUNTOF(required_vars), *env);
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env_len += (uv_utf8_to_utf16(*env, NULL, 0) * sizeof(wchar_t));
}
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for (i = 0; i < COUNTOF(required_vars); ++i) {
if (!required_vars[i].supplied) {
env_len += required_vars[i].len * sizeof(wchar_t);
var_size = GetEnvironmentVariableW(required_vars[i].wide, NULL, 0);
if (var_size == 0) {
uv_fatal_error(GetLastError(), "GetEnvironmentVariableW");
}
required_vars[i].value_len = (int)var_size;
env_len += (int)var_size * sizeof(wchar_t);
}
}
dst = malloc(env_len);
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if (!dst) {
uv_fatal_error(ERROR_OUTOFMEMORY, "malloc");
}
ptr = dst;
for (env = env_block; *env; env++, ptr += len) {
len = uv_utf8_to_utf16(*env, ptr, (size_t)(env_len - (ptr - dst)));
if (!len) {
free(dst);
return NULL;
}
}
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for (i = 0; i < COUNTOF(required_vars); ++i) {
if (!required_vars[i].supplied) {
wcscpy(ptr, required_vars[i].wide);
ptr += required_vars[i].len - 1;
*ptr++ = L'=';
var_size = GetEnvironmentVariableW(required_vars[i].wide, ptr, required_vars[i].value_len);
if (var_size == 0) {
uv_fatal_error(GetLastError(), "GetEnvironmentVariableW");
}
ptr += required_vars[i].value_len;
}
}
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603
*ptr = L'\0';
return dst;
}
Aug 2, 2011
Aug 2, 2011
604
605
606
/*
* Called on Windows thread-pool thread to indicate that
* a child process has exited.
Jul 30, 2011
Jul 30, 2011
607
608
609
*/
static void CALLBACK exit_wait_callback(void* data, BOOLEAN didTimeout) {
uv_process_t* process = (uv_process_t*)data;
Aug 2, 2011
Aug 2, 2011
610
Jul 30, 2011
Jul 30, 2011
611
612
assert(didTimeout == FALSE);
assert(process);
Aug 2, 2011
Aug 2, 2011
613
Jul 30, 2011
Jul 30, 2011
614
/* Post completed */
Aug 15, 2011
Aug 15, 2011
615
POST_COMPLETION_FOR_REQ(&process->exit_req);
Jul 30, 2011
Jul 30, 2011
616
617
618
}
Aug 2, 2011
Aug 2, 2011
619
620
621
/*
* Called on Windows thread-pool thread to indicate that
* UnregisterWaitEx has completed.
Jul 30, 2011
Jul 30, 2011
622
623
624
*/
static void CALLBACK close_wait_callback(void* data, BOOLEAN didTimeout) {
uv_process_t* process = (uv_process_t*)data;
Aug 2, 2011
Aug 2, 2011
625
Jul 30, 2011
Jul 30, 2011
626
627
628
629
assert(didTimeout == FALSE);
assert(process);
/* Post completed */
Aug 15, 2011
Aug 15, 2011
630
POST_COMPLETION_FOR_REQ(&process->close_req);
Jul 30, 2011
Jul 30, 2011
631
632
633
}
Aug 2, 2011
Aug 2, 2011
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
/*
* Called on windows thread pool when CreateProcess failed. It writes an error
* message to the process' intended stderr and then posts a PROCESS_EXIT
* packet to the completion port.
*/
static DWORD WINAPI spawn_failure(void* data) {
char syscall[] = "CreateProcessW: ";
char unknown[] = "unknown error\n";
uv_process_t* process = (uv_process_t*) data;
HANDLE child_stderr = process->stdio_pipes[2].child_pipe;
char* buf = NULL;
DWORD count, written;
WriteFile(child_stderr, syscall, sizeof(syscall) - 1, &written, NULL);
count = FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
process->spawn_errno,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPSTR) &buf,
0,
NULL);
if (buf != NULL && count > 0) {
WriteFile(child_stderr, buf, count, &written, NULL);
LocalFree(buf);
} else {
WriteFile(child_stderr, unknown, sizeof(unknown) - 1, &written, NULL);
}
FlushFileBuffers(child_stderr);
/* Post completed */
Aug 15, 2011
Aug 15, 2011
669
POST_COMPLETION_FOR_REQ(&process->exit_req);
Aug 2, 2011
Aug 2, 2011
670
671
672
673
674
return 0;
}
Jul 30, 2011
Jul 30, 2011
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
/* Called on main thread after a child process has exited. */
void uv_process_proc_exit(uv_process_t* handle) {
int i;
DWORD exit_code;
/* Close stdio handles. */
for (i = 0; i < COUNTOF(handle->stdio_pipes); i++) {
if (handle->stdio_pipes[i].child_pipe != INVALID_HANDLE_VALUE) {
CloseHandle(handle->stdio_pipes[i].child_pipe);
handle->stdio_pipes[i].child_pipe = INVALID_HANDLE_VALUE;
}
}
/* Unregister from process notification. */
if (handle->wait_handle != INVALID_HANDLE_VALUE) {
UnregisterWait(handle->wait_handle);
handle->wait_handle = INVALID_HANDLE_VALUE;
}
if (handle->process_handle != INVALID_HANDLE_VALUE) {
/* Get the exit code. */
if (!GetExitCodeProcess(handle->process_handle, &exit_code)) {
Aug 2, 2011
Aug 2, 2011
697
exit_code = 127;
Jul 30, 2011
Jul 30, 2011
698
699
}
Aug 2, 2011
Aug 2, 2011
700
/* Clean-up the process handle. */
Jul 30, 2011
Jul 30, 2011
701
702
CloseHandle(handle->process_handle);
handle->process_handle = INVALID_HANDLE_VALUE;
Aug 2, 2011
Aug 2, 2011
703
704
705
} else {
/* The process never even started in the first place. */
exit_code = 127;
Jul 30, 2011
Jul 30, 2011
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
}
/* Fire the exit callback. */
if (handle->exit_cb) {
handle->exit_cb(handle, exit_code, handle->exit_signal);
}
}
/* Called on main thread after UnregisterWaitEx finishes. */
void uv_process_proc_close(uv_process_t* handle) {
uv_want_endgame((uv_handle_t*)handle);
}
void uv_process_endgame(uv_process_t* handle) {
if (handle->flags & UV_HANDLE_CLOSING) {
assert(!(handle->flags & UV_HANDLE_CLOSED));
handle->flags |= UV_HANDLE_CLOSED;
if (handle->close_cb) {
handle->close_cb((uv_handle_t*)handle);
}
uv_unref();
}
}
void uv_process_close(uv_process_t* handle) {
if (handle->wait_handle != INVALID_HANDLE_VALUE) {
handle->close_handle = CreateEvent(NULL, FALSE, FALSE, NULL);
UnregisterWaitEx(handle->wait_handle, handle->close_handle);
handle->wait_handle = NULL;
RegisterWaitForSingleObject(&handle->wait_handle, handle->close_handle,
close_wait_callback, (void*)handle, INFINITE,
WT_EXECUTEINWAITTHREAD | WT_EXECUTEONLYONCE);
} else {
uv_want_endgame((uv_handle_t*)handle);
}
}
static int uv_create_stdio_pipe_pair(uv_pipe_t* server_pipe, HANDLE* child_pipe, DWORD server_access, DWORD child_access) {
int err;
SECURITY_ATTRIBUTES sa = { sizeof(SECURITY_ATTRIBUTES), NULL, TRUE };
char pipe_name[64];
Jul 30, 2011
Jul 30, 2011
754
DWORD mode = PIPE_TYPE_BYTE | PIPE_READMODE_BYTE | PIPE_WAIT;
Jul 30, 2011
Jul 30, 2011
755
Aug 2, 2011
Aug 2, 2011
756
if (server_pipe->type != UV_NAMED_PIPE) {
Jul 30, 2011
Jul 30, 2011
757
758
uv_set_error(UV_EINVAL, 0);
err = -1;
Aug 2, 2011
Aug 2, 2011
759
goto done;
Jul 30, 2011
Jul 30, 2011
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
}
/* Create server pipe handle. */
err = uv_stdio_pipe_server(server_pipe, server_access, pipe_name, sizeof(pipe_name));
if (err) {
goto done;
}
/* Create child pipe handle. */
*child_pipe = CreateFileA(pipe_name,
child_access,
0,
&sa,
OPEN_EXISTING,
0,
NULL);
if (*child_pipe == INVALID_HANDLE_VALUE) {
uv_set_sys_error(GetLastError());
err = -1;
goto done;
}
Jul 30, 2011
Jul 30, 2011
783
784
785
786
787
788
if (!SetNamedPipeHandleState(*child_pipe, &mode, NULL, NULL)) {
uv_set_sys_error(GetLastError());
err = -1;
goto done;
}
Jul 30, 2011
Jul 30, 2011
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
/* Do a blocking ConnectNamedPipe. This should not block because
* we have both ends of the pipe created.
*/
if (!ConnectNamedPipe(server_pipe->handle, NULL)) {
if (GetLastError() != ERROR_PIPE_CONNECTED) {
uv_set_sys_error(GetLastError());
err = -1;
goto done;
}
}
err = 0;
done:
if (err) {
if (server_pipe->handle != INVALID_HANDLE_VALUE) {
close_pipe(server_pipe, NULL, NULL);
}
if (*child_pipe != INVALID_HANDLE_VALUE) {
CloseHandle(*child_pipe);
*child_pipe = INVALID_HANDLE_VALUE;
}
}
return err;
}
817
818
int uv_spawn(uv_process_t* process, uv_process_options_t options) {
Aug 2, 2011
Aug 2, 2011
819
int err = 0, i;
Aug 1, 2011
Aug 1, 2011
820
wchar_t* path;
Jul 30, 2011
Jul 30, 2011
821
822
823
824
int size;
wchar_t* application_path, *application, *arguments, *env, *cwd;
STARTUPINFOW startup;
PROCESS_INFORMATION info;
Aug 2, 2011
Aug 2, 2011
825
Jul 30, 2011
Jul 30, 2011
826
827
828
829
uv_process_init(process);
process->exit_cb = options.exit_cb;
UTF8_TO_UTF16(options.file, application);
Aug 5, 2011
Aug 5, 2011
830
arguments = options.args ? make_program_args(options.args, options.windows_verbatim_arguments) : NULL;
Aug 1, 2011
Aug 1, 2011
831
env = options.env ? make_program_env(options.env) : NULL;
Jul 30, 2011
Jul 30, 2011
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
if (options.cwd) {
UTF8_TO_UTF16(options.cwd, cwd);
} else {
size = GetCurrentDirectoryW(0, NULL) * sizeof(wchar_t);
if (size) {
cwd = (wchar_t*)malloc(size);
if (!cwd) {
uv_fatal_error(ERROR_OUTOFMEMORY, "malloc");
}
GetCurrentDirectoryW(size, cwd);
} else {
uv_set_sys_error(GetLastError());
err = -1;
goto done;
}
}
Aug 1, 2011
Aug 1, 2011
850
851
852
/* Get PATH env. variable. */
size = GetEnvironmentVariableW(L"PATH", NULL, 0) + 1;
path = (wchar_t*)malloc(size * sizeof(wchar_t));
Aug 1, 2011
Aug 1, 2011
853
if (!path) {
Aug 1, 2011
Aug 1, 2011
854
uv_fatal_error(ERROR_OUTOFMEMORY, "malloc");
Aug 1, 2011
Aug 1, 2011
855
}
Aug 1, 2011
Aug 1, 2011
856
857
GetEnvironmentVariableW(L"PATH", path, size * sizeof(wchar_t));
path[size - 1] = L'\0';
Aug 1, 2011
Aug 1, 2011
858
Aug 2, 2011
Aug 2, 2011
859
application_path = search_path(application,
Jul 30, 2011
Jul 30, 2011
860
cwd,
Aug 1, 2011
Aug 1, 2011
861
path,
Aug 1, 2011
Aug 1, 2011
862
DEFAULT_PATH_EXT);
Jul 30, 2011
Jul 30, 2011
863
864
if (!application_path) {
Aug 2, 2011
Aug 2, 2011
865
866
867
/* CreateProcess will fail, but this allows us to pass this error to */
/* the user asynchronously. */
application_path = application;
Jul 30, 2011
Jul 30, 2011
868
869
870
871
}
/* Create stdio pipes. */
if (options.stdin_stream) {
Jul 30, 2011
Jul 30, 2011
872
err = uv_create_stdio_pipe_pair(options.stdin_stream, &process->stdio_pipes[0].child_pipe, PIPE_ACCESS_OUTBOUND, GENERIC_READ | FILE_WRITE_ATTRIBUTES);
Jul 30, 2011
Jul 30, 2011
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
if (err) {
goto done;
}
process->stdio_pipes[0].server_pipe = options.stdin_stream;
}
if (options.stdout_stream) {
err = uv_create_stdio_pipe_pair(options.stdout_stream, &process->stdio_pipes[1].child_pipe, PIPE_ACCESS_INBOUND, GENERIC_WRITE);
if (err) {
goto done;
}
process->stdio_pipes[1].server_pipe = options.stdout_stream;
}
if (options.stderr_stream) {
err = uv_create_stdio_pipe_pair(options.stderr_stream, &process->stdio_pipes[2].child_pipe, PIPE_ACCESS_INBOUND, GENERIC_WRITE);
if (err) {
goto done;
}
process->stdio_pipes[2].server_pipe = options.stderr_stream;
}
startup.cb = sizeof(startup);
startup.lpReserved = NULL;
startup.lpDesktop = NULL;
startup.lpTitle = NULL;
startup.dwFlags = STARTF_USESTDHANDLES;
startup.cbReserved2 = 0;
startup.lpReserved2 = NULL;
startup.hStdInput = process->stdio_pipes[0].child_pipe;
startup.hStdOutput = process->stdio_pipes[1].child_pipe;
startup.hStdError = process->stdio_pipes[2].child_pipe;
Aug 2, 2011
Aug 2, 2011
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
if (CreateProcessW(application_path,
arguments,
NULL,
NULL,
1,
CREATE_UNICODE_ENVIRONMENT,
env,
cwd,
&startup,
&info)) {
/* Spawn succeeded */
process->process_handle = info.hProcess;
process->pid = info.dwProcessId;
/* Setup notifications for when the child process exits. */
if (!RegisterWaitForSingleObject(&process->wait_handle, process->process_handle,
exit_wait_callback, (void*)process, INFINITE,
WT_EXECUTEINWAITTHREAD | WT_EXECUTEONLYONCE)) {
uv_fatal_error(GetLastError(), "RegisterWaitForSingleObject");
}
Jul 30, 2011
Jul 30, 2011
929
Aug 2, 2011
Aug 2, 2011
930
CloseHandle(info.hThread);
Jul 30, 2011
Jul 30, 2011
931
Aug 2, 2011
Aug 2, 2011
932
933
934
935
936
937
938
939
940
941
} else {
/* CreateProcessW failed, but this failure should be delivered */
/* asynchronously to retain unix compatibility. So pretent spawn */
/* succeeded, and start a thread instead that prints an error */
/* to the child's intended stderr. */
process->spawn_errno = GetLastError();
if (!QueueUserWorkItem(spawn_failure, process, WT_EXECUTEDEFAULT)) {
uv_fatal_error(GetLastError(), "QueueUserWorkItem");
}
}
Jul 30, 2011
Jul 30, 2011
942
943
944
done:
free(application);
Aug 2, 2011
Aug 2, 2011
945
946
947
if (application_path != application) {
free(application_path);
}
Jul 30, 2011
Jul 30, 2011
948
949
950
free(arguments);
free(cwd);
free(env);
Aug 1, 2011
Aug 1, 2011
951
free(path);
Jul 30, 2011
Jul 30, 2011
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
if (err) {
for (i = 0; i < COUNTOF(process->stdio_pipes); i++) {
if (process->stdio_pipes[i].child_pipe != INVALID_HANDLE_VALUE) {
CloseHandle(process->stdio_pipes[i].child_pipe);
process->stdio_pipes[i].child_pipe = INVALID_HANDLE_VALUE;
}
}
if (process->wait_handle != INVALID_HANDLE_VALUE) {
UnregisterWait(process->wait_handle);
process->wait_handle = INVALID_HANDLE_VALUE;
}
if (process->process_handle != INVALID_HANDLE_VALUE) {
CloseHandle(process->process_handle);
process->process_handle = INVALID_HANDLE_VALUE;
}
}
return err;
973
974
975
976
}
int uv_process_kill(uv_process_t* process, int signum) {
Jul 30, 2011
Jul 30, 2011
977
978
979
980
981
982
983
984
985
process->exit_signal = signum;
/* On windows killed processes normally return 1 */
if (process->process_handle != INVALID_HANDLE_VALUE &&
TerminateProcess(process->process_handle, 1)) {
return 0;
}
return -1;