src/common/win_process.c

#ifndef lint
static char RCSid[]="$Id: win_process.c,v 3.13 2016/03/28 16:59:38 schorsch Exp $";
#endif
/*
 * Routines to communicate with separate process via dual pipes.
 * Windows version.
 *
 * External symbols declared in standard.h
 */

#include "copyright.h"

#include <stdio.h>
#define STRICT
#include <windows.h> /* typedefs */
#include <io.h>      /* _open_osfhandle */
#include <fcntl.h>   /* _O_XXX */

#include "rterror.h"
#include "rtio.h"
#include "rtprocess.h"


SUBPROC         sp_inactive;    /* zero initialization is fine */


int
win_nice(int inc) /* simple nice(2) replacement for Windows */
{
        /* We don't have much granularity available: IDLE_PRIORITY_CLASS
           will run whenever no other higher priority process is running */
        if (inc > 0) {
                return (int)!SetPriorityClass(GetCurrentProcess(), IDLE_PRIORITY_CLASS);
        }
        return 0;
}


/*
    Safely terminate a process by creating a remote thread
    in the process that calls ExitProcess.
        As presented by Andrew Tucker in Windows Developer Magazine.
*/
BOOL SafeTerminateProcess(HANDLE hProcess, UINT uExitCode)
{
        DWORD dwTID, dwCode, dwErr = 0;
        HANDLE hProcessDup = INVALID_HANDLE_VALUE;
        HANDLE hRT = NULL;
        HINSTANCE hKernel = GetModuleHandle("Kernel32");
        BOOL bSuccess = FALSE;

        BOOL bDup = DuplicateHandle(GetCurrentProcess(), 
                        hProcess, 
                        GetCurrentProcess(), 
                        &hProcessDup, 
                        PROCESS_ALL_ACCESS, 
                        FALSE, 
                        0);
        /* Detect the special case where the process is already dead... */
        if ( GetExitCodeProcess((bDup) ? hProcessDup : hProcess, &dwCode) && 
                        (dwCode == STILL_ACTIVE) ) {
                FARPROC pfnExitProc;
                pfnExitProc = GetProcAddress(hKernel, "ExitProcess");
                hRT = CreateRemoteThread((bDup) ? hProcessDup : hProcess, 
                                NULL, 
                                0, 
                                (LPTHREAD_START_ROUTINE)pfnExitProc,
                                (PVOID)uExitCode, 0, &dwTID);
                if ( hRT == NULL ) dwErr = GetLastError();
        } else {
                dwErr = ERROR_PROCESS_ABORTED;
        }
        if ( hRT ) {
                /* Must wait process to terminate to guarantee that it has exited... */
                WaitForSingleObject((bDup) ? hProcessDup : hProcess, INFINITE);
                CloseHandle(hRT);
                bSuccess = TRUE;
        }
        if ( bDup ) CloseHandle(hProcessDup);
        if ( !bSuccess ) SetLastError(dwErr);
        return bSuccess;
}


static int
start_process(SUBPROC *proc, char *cmdstr)
{
        BOOL res;
        int Pflags = 0;
        SECURITY_ATTRIBUTES SAttrs;
        STARTUPINFO SInfo;
        PROCESS_INFORMATION PInfo;
        /* welcome to the world of resource handles */
        HANDLE hToChildRead = NULL;
        HANDLE hToChildWrite = NULL;
        HANDLE hFromChildRead = NULL;
        HANDLE hFromChildWrite = NULL;
        HANDLE hRead = NULL, hWrite = NULL;
        HANDLE hStdIn, hStdOut, hStdErr;
        HANDLE hCurProc;

        /* get process and standard stream handles */
        hCurProc = GetCurrentProcess();
        hStdIn = GetStdHandle(STD_INPUT_HANDLE);
        hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
        hStdErr = GetStdHandle(STD_ERROR_HANDLE);
        
        /* the remote pipe handles must be inheritable */
        SAttrs.bInheritHandle = 1;
        SAttrs.lpSecurityDescriptor = NULL;
        SAttrs.nLength = sizeof(SECURITY_ATTRIBUTES);

        /* make pipe, assign to stdout */
        /* we'll check for errors after CreateProcess()...*/
        res = CreatePipe(&hFromChildRead, &hFromChildWrite, &SAttrs, 0);
        res = SetStdHandle(STD_OUTPUT_HANDLE, hFromChildWrite);
        /* create non-inheritable dup of local end */
        res = DuplicateHandle(hCurProc, hFromChildRead, hCurProc, &hRead,
                        0, FALSE, DUPLICATE_SAME_ACCESS);
        CloseHandle(hFromChildRead); hFromChildRead = NULL;

        res = CreatePipe(&hToChildRead, &hToChildWrite, &SAttrs, 0);
        res = SetStdHandle(STD_INPUT_HANDLE, hToChildRead);
        res = DuplicateHandle(hCurProc, hToChildWrite, hCurProc, &hWrite,
                        0, FALSE, DUPLICATE_SAME_ACCESS);
        CloseHandle(hToChildWrite); hToChildWrite = NULL;

        CloseHandle(hCurProc); hCurProc = NULL;

        /* do some bookkeeping for Windows... */
        SInfo.cb = sizeof(STARTUPINFO);
        SInfo.lpReserved = NULL;
        SInfo.lpDesktop = NULL;
        SInfo.lpTitle = NULL;
        SInfo.cbReserved2 = 0;
        SInfo.lpReserved2 = NULL;
        /* don't open a console automatically, pass handles */
        SInfo.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
        SInfo.wShowWindow = SW_HIDE;
        SInfo.hStdInput = hToChildRead;
        SInfo.hStdOutput = hFromChildWrite;
        SInfo.hStdError = hStdErr; /* reuse original stderr */
        
        res = CreateProcess(NULL, /* command name */
                cmdstr, /* full command line */
                NULL,    /* default process attributes */
                NULL,    /* default security attributes */
                1,       /* inherit handles (pass doesn't work reliably) */
                Pflags,  /* process flags */
                NULL,    /* no new environment */
                NULL,    /* stay in current directory */
                &SInfo,
                &PInfo
                );
        /* reset stdin/stdout in any case */
        SetStdHandle(STD_OUTPUT_HANDLE, hStdOut);
        SetStdHandle(STD_INPUT_HANDLE, hStdIn);
        /* Oops... */
        if(res == 0) {
                char es[128];
                _snprintf(es, sizeof(es),
                                "Error creating process (%d)\n", GetLastError());
                eputs(es);
                goto error;
        }
        /* close stuff we don't need */
        CloseHandle(PInfo.hThread);
        CloseHandle(hFromChildWrite); hFromChildWrite = NULL;
        CloseHandle(hToChildRead); hToChildRead = NULL;
        /* get the file descriptors */
        proc->r = _open_osfhandle((long)hRead, _O_RDONLY|_O_BINARY);
        proc->w = _open_osfhandle((long)hWrite, _O_APPEND|_O_BINARY);
        proc->pid = PInfo.dwProcessId;
        proc->flags = PF_RUNNING;
        CloseHandle(hCurProc);
        /* Windows doesn't tell us the actual buffer size */
        return PIPE_BUF;

error: /* cleanup */
        if(PInfo.hThread) CloseHandle(PInfo.hThread);
        if(hToChildRead) CloseHandle(hToChildRead);
        if(hToChildWrite) CloseHandle(hToChildWrite);
        if(hFromChildRead) CloseHandle(hFromChildRead);
        if(hFromChildWrite) CloseHandle(hFromChildWrite);
        if(hRead) CloseHandle(hRead);
        if(hWrite) CloseHandle(hWrite);
        if(hCurProc) CloseHandle(hCurProc);
        proc->flags = 0;
        return -1;
        /* There... Are we happy now? */
}


static size_t         /* copied size or -1 on error */
wordncopy(         /* copy (quoted) src to dest. */

char * dest,
char * src,
size_t dlen,
int insert_space,  /* prepend a space  */
int force_dq       /* turn 'src' into "dest" (for Win command line) */
)
{
        size_t slen;
        size_t pos = 0;

        slen = strlen(src);
        if (insert_space) {
                if (1 >= dlen) return -1;
                dest[pos++] = ' ';
        }
        if (strpbrk(src, " \f\n\r\t\v")) {
                if (force_dq && src[0] == '\'' && src[slen-1] == '\'') {
                        if (slen + pos + 1 > dlen) return -1;
                        dest[pos++] = '"';
                        strncpy(dest + pos, src + 1, slen -2);
                        pos += slen - 2;
                        dest[pos++] = '"';
                } else if (src[0] == '"' && src[slen-1] == '"') {
                        if (slen + pos + 1 > dlen) return -1;
                        strncpy(dest + pos, src, slen);
                        pos += slen;
                } else {
                        if (slen + pos + 3 > dlen) return -1;
                        dest[pos++] = '"';
                        strncpy(dest + pos, src, slen);
                        pos += slen;
                        dest[pos++] = '"';
                }
        } else {
                if (slen + pos + 1 > dlen) return -1;
                strncpy(dest + pos, src, slen);
                pos += slen;
        }
        dest[pos] = '\0';
        return pos;
}       


static char *
quoted_cmdline(  /* compose command line for StartProcess() as static string */

char *cmdpath,  /* full path to executable */
char *sl[]       /* list of arguments */
)
{
        static char *cmdstr;
        static size_t clen;
        char *newcs;
        size_t newlen, pos, i, res;

        newlen = strlen(cmdpath) + 3; /* allow two quotes plus the final \0 */
        for (i = 0; sl[i] != NULL; i++) {
                newlen += strlen(sl[i]) + 3; /* allow two quotes and a space */
        }
        if (cmdstr == NULL) {
                cmdstr = (char *) malloc(newlen);
                if (cmdstr == NULL) return NULL;
        } else if (newlen > clen) {
                newcs = (char *) realloc(cmdstr, newlen);
                if (newcs == NULL) return NULL;
                cmdstr = newcs;
        }
        clen = newlen;
        pos = wordncopy(cmdstr, cmdpath, clen, 0, 1);
        if (pos < 0) return NULL;
        for (i = 0; sl[i] != NULL; i++) {
                res = wordncopy(cmdstr + pos, sl[i], clen - pos, 1, 1);
                if (res < 0) return NULL;
                pos += res;
        }
        return cmdstr;
}


int
open_process(SUBPROC *proc, char *av[])
{
        char *cmdpath;
        char *cmdstr;

        if (av == NULL || av[0] == NULL || proc->flags) {
                fputs("Illegal call to open_process()!\n", stderr);
                return -1;
        }
        proc->pid = 0;
        if (av == NULL) { return -1; }
        cmdpath = getpath(av[0], getenv("PATH"), X_OK);
        cmdstr = quoted_cmdline(cmdpath, av+1);
        if (cmdstr == NULL) { return 0; }
        return start_process(proc, cmdstr);
}


int win_kill(RT_PID pid, int sig) /* we ignore sig... */
{
        HANDLE hProc;

        hProc = OpenProcess(SYNCHRONIZE|PROCESS_TERMINATE, FALSE, pid);
        /*  it looks like we want to ignore errors here */
        if(hProc != NULL) {
                SafeTerminateProcess(hProc, 0);
                CloseHandle(hProc);
        }
        return 0; /* XXX we need to figure out more here... */
}


int
close_processes(SUBPROC pd[], int nproc) {
        int i, icres, ocres;
        DWORD pid;

        for (i = 0; i < nproc; i++) {
                if (pd[i].flags & PF_RUNNING) {
                        ocres = close(pd[i].w);
                        icres = close(pd[i].r);
                        pd[i].flags = 0;
                        if(ocres != 0 || icres != 0) {
                                /* something went wrong: enforce infanticide */
                                /* other than that, it looks like we want to ignore errors */
                                win_kill(pd[i].pid, 0);
                        }
                }
                pd[i].pid = 0;
        }
        return 0; /* XXX we need to figure out more here... */
}


#ifdef TEST_MODULE
int
main( int argc, char **argv )
{
        SUBPROC proc;
        FILE *inf, *outf;
        int res;
        char ret[1024];
        char *command[]= {"word", "gappy word", "\"quoted words\"", "'squoted words'", NULL};

        proc.flags = 0;
        proc.pid = 0;
        res = open_process(&proc, command)
        if (res == 0) {
                printf("open_process() failed with return value 0\n");
                return -1;
        }
        printf("process opened with return value: %d, pid: %d,  r: %d,  w: %d\n",
                        res, proc.pid, proc.r, proc.w);
        inf = fdopen(proc.r, "rb");
        outf = fdopen(proc.w, "wb");
        fprintf(outf,"0 0 0 0 1 0\n");
        fflush(outf);
        fgets(ret, sizeof(ret), inf);
        printf("%s\n",ret);
        close_process(&proc);
}
#endif

Revision:	3.14
Committed:	Fri Feb 28 05:18:49 2020 UTC (4 years, 2 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad5R4, rad5R3, HEAD
Changes since 3.13:	+12 -8 lines
Log Message:	Added filtering capabilities to Unix version of open_process()
#	User	Rev	Content
1	schorsch	3.1	#ifndef lint
2	greg	3.14	static char RCSid[]="$Id: win_process.c,v 3.13 2016/03/28 16:59:38 schorsch Exp $";
3	schorsch	3.1	#endif
4			/*
5			* Routines to communicate with separate process via dual pipes.
6			* Windows version.
7			*
8			* External symbols declared in standard.h
9			*/
10
11			#include "copyright.h"
12
13			#include <stdio.h>
14			#define STRICT
15			#include <windows.h> /* typedefs */
16			#include <io.h> /* _open_osfhandle */
17			#include <fcntl.h> /* _O_XXX */
18
19	schorsch	3.3	#include "rterror.h"
20			#include "rtio.h"
21	schorsch	3.1	#include "rtprocess.h"
22
23
24	greg	3.14	SUBPROC sp_inactive; /* zero initialization is fine */
25
26
27	schorsch	3.4	int
28			win_nice(int inc) /* simple nice(2) replacement for Windows */
29			{
30			/* We don't have much granularity available: IDLE_PRIORITY_CLASS
31			will run whenever no other higher priority process is running */
32			if (inc > 0) {
33			return (int)!SetPriorityClass(GetCurrentProcess(), IDLE_PRIORITY_CLASS);
34			}
35			return 0;
36			}
37	schorsch	3.1
38
39			/*
40			Safely terminate a process by creating a remote thread
41			in the process that calls ExitProcess.
42			As presented by Andrew Tucker in Windows Developer Magazine.
43			*/
44			BOOL SafeTerminateProcess(HANDLE hProcess, UINT uExitCode)
45			{
46			DWORD dwTID, dwCode, dwErr = 0;
47			HANDLE hProcessDup = INVALID_HANDLE_VALUE;
48			HANDLE hRT = NULL;
49			HINSTANCE hKernel = GetModuleHandle("Kernel32");
50			BOOL bSuccess = FALSE;
51
52			BOOL bDup = DuplicateHandle(GetCurrentProcess(),
53			hProcess,
54			GetCurrentProcess(),
55			&hProcessDup,
56			PROCESS_ALL_ACCESS,
57			FALSE,
58			0);
59			/* Detect the special case where the process is already dead... */
60			if ( GetExitCodeProcess((bDup) ? hProcessDup : hProcess, &dwCode) &&
61			(dwCode == STILL_ACTIVE) ) {
62			FARPROC pfnExitProc;
63			pfnExitProc = GetProcAddress(hKernel, "ExitProcess");
64			hRT = CreateRemoteThread((bDup) ? hProcessDup : hProcess,
65			NULL,
66			0,
67			(LPTHREAD_START_ROUTINE)pfnExitProc,
68			(PVOID)uExitCode, 0, &dwTID);
69			if ( hRT == NULL ) dwErr = GetLastError();
70			} else {
71			dwErr = ERROR_PROCESS_ABORTED;
72			}
73			if ( hRT ) {
74			/* Must wait process to terminate to guarantee that it has exited... */
75			WaitForSingleObject((bDup) ? hProcessDup : hProcess, INFINITE);
76			CloseHandle(hRT);
77			bSuccess = TRUE;
78			}
79			if ( bDup ) CloseHandle(hProcessDup);
80			if ( !bSuccess ) SetLastError(dwErr);
81			return bSuccess;
82			}
83
84
85			static int
86			start_process(SUBPROC proc, char cmdstr)
87			{
88			BOOL res;
89			int Pflags = 0;
90			SECURITY_ATTRIBUTES SAttrs;
91			STARTUPINFO SInfo;
92			PROCESS_INFORMATION PInfo;
93			/* welcome to the world of resource handles */
94			HANDLE hToChildRead = NULL;
95			HANDLE hToChildWrite = NULL;
96			HANDLE hFromChildRead = NULL;
97			HANDLE hFromChildWrite = NULL;
98			HANDLE hRead = NULL, hWrite = NULL;
99			HANDLE hStdIn, hStdOut, hStdErr;
100			HANDLE hCurProc;
101
102			/* get process and standard stream handles */
103			hCurProc = GetCurrentProcess();
104			hStdIn = GetStdHandle(STD_INPUT_HANDLE);
105			hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
106			hStdErr = GetStdHandle(STD_ERROR_HANDLE);
107
108			/* the remote pipe handles must be inheritable */
109			SAttrs.bInheritHandle = 1;
110			SAttrs.lpSecurityDescriptor = NULL;
111			SAttrs.nLength = sizeof(SECURITY_ATTRIBUTES);
112
113			/* make pipe, assign to stdout */
114			/* we'll check for errors after CreateProcess()...*/
115			res = CreatePipe(&hFromChildRead, &hFromChildWrite, &SAttrs, 0);
116			res = SetStdHandle(STD_OUTPUT_HANDLE, hFromChildWrite);
117			/* create non-inheritable dup of local end */
118			res = DuplicateHandle(hCurProc, hFromChildRead, hCurProc, &hRead,
119			0, FALSE, DUPLICATE_SAME_ACCESS);
120			CloseHandle(hFromChildRead); hFromChildRead = NULL;
121
122			res = CreatePipe(&hToChildRead, &hToChildWrite, &SAttrs, 0);
123			res = SetStdHandle(STD_INPUT_HANDLE, hToChildRead);
124			res = DuplicateHandle(hCurProc, hToChildWrite, hCurProc, &hWrite,
125			0, FALSE, DUPLICATE_SAME_ACCESS);
126			CloseHandle(hToChildWrite); hToChildWrite = NULL;
127
128			CloseHandle(hCurProc); hCurProc = NULL;
129
130			/* do some bookkeeping for Windows... */
131			SInfo.cb = sizeof(STARTUPINFO);
132			SInfo.lpReserved = NULL;
133			SInfo.lpDesktop = NULL;
134			SInfo.lpTitle = NULL;
135			SInfo.cbReserved2 = 0;
136			SInfo.lpReserved2 = NULL;
137			/* don't open a console automatically, pass handles */
138			SInfo.dwFlags = STARTF_USESHOWWINDOW \| STARTF_USESTDHANDLES;
139			SInfo.wShowWindow = SW_HIDE;
140			SInfo.hStdInput = hToChildRead;
141			SInfo.hStdOutput = hFromChildWrite;
142			SInfo.hStdError = hStdErr; /* reuse original stderr */
143
144			res = CreateProcess(NULL, /* command name */
145			cmdstr, /* full command line */
146			NULL, /* default process attributes */
147			NULL, /* default security attributes */
148			1, /* inherit handles (pass doesn't work reliably) */
149			Pflags, /* process flags */
150			NULL, /* no new environment */
151			NULL, /* stay in current directory */
152			&SInfo,
153			&PInfo
154			);
155			/* reset stdin/stdout in any case */
156			SetStdHandle(STD_OUTPUT_HANDLE, hStdOut);
157			SetStdHandle(STD_INPUT_HANDLE, hStdIn);
158			/* Oops... */
159			if(res == 0) {
160			char es[128];
161			_snprintf(es, sizeof(es),
162			"Error creating process (%d)\n", GetLastError());
163			eputs(es);
164			goto error;
165			}
166			/* close stuff we don't need */
167			CloseHandle(PInfo.hThread);
168			CloseHandle(hFromChildWrite); hFromChildWrite = NULL;
169			CloseHandle(hToChildRead); hToChildRead = NULL;
170			/* get the file descriptors */
171	greg	3.9	proc->r = _open_osfhandle((long)hRead, _O_RDONLY\|_O_BINARY);
172			proc->w = _open_osfhandle((long)hWrite, _O_APPEND\|_O_BINARY);
173	schorsch	3.1	proc->pid = PInfo.dwProcessId;
174	greg	3.14	proc->flags = PF_RUNNING;
175	schorsch	3.1	CloseHandle(hCurProc);
176			/* Windows doesn't tell us the actual buffer size */
177			return PIPE_BUF;
178
179			error: /* cleanup */
180			if(PInfo.hThread) CloseHandle(PInfo.hThread);
181			if(hToChildRead) CloseHandle(hToChildRead);
182			if(hToChildWrite) CloseHandle(hToChildWrite);
183			if(hFromChildRead) CloseHandle(hFromChildRead);
184			if(hFromChildWrite) CloseHandle(hFromChildWrite);
185			if(hRead) CloseHandle(hRead);
186			if(hWrite) CloseHandle(hWrite);
187			if(hCurProc) CloseHandle(hCurProc);
188	greg	3.14	proc->flags = 0;
189	greg	3.7	return -1;
190	schorsch	3.1	/* There... Are we happy now? */
191			}
192
193
194	schorsch	3.12	static size_t /* copied size or -1 on error */
195	schorsch	3.1	wordncopy( /* copy (quoted) src to dest. */
196
197			char * dest,
198			char * src,
199	schorsch	3.12	size_t dlen,
200	schorsch	3.1	int insert_space, /* prepend a space */
201			int force_dq /* turn 'src' into "dest" (for Win command line) */
202			)
203			{
204	schorsch	3.12	size_t slen;
205			size_t pos = 0;
206	schorsch	3.1
207			slen = strlen(src);
208			if (insert_space) {
209			if (1 >= dlen) return -1;
210			dest[pos++] = ' ';
211			}
212			if (strpbrk(src, " \f\n\r\t\v")) {
213			if (force_dq && src[0] == '\'' && src[slen-1] == '\'') {
214			if (slen + pos + 1 > dlen) return -1;
215			dest[pos++] = '"';
216			strncpy(dest + pos, src + 1, slen -2);
217			pos += slen - 2;
218			dest[pos++] = '"';
219			} else if (src[0] == '"' && src[slen-1] == '"') {
220			if (slen + pos + 1 > dlen) return -1;
221			strncpy(dest + pos, src, slen);
222			pos += slen;
223			} else {
224			if (slen + pos + 3 > dlen) return -1;
225			dest[pos++] = '"';
226			strncpy(dest + pos, src, slen);
227			pos += slen;
228			dest[pos++] = '"';
229			}
230			} else {
231			if (slen + pos + 1 > dlen) return -1;
232			strncpy(dest + pos, src, slen);
233			pos += slen;
234			}
235			dest[pos] = '\0';
236			return pos;
237			}
238
239
240
241			static char *
242			quoted_cmdline( /* compose command line for StartProcess() as static string */
243
244			char cmdpath, / full path to executable */
245			char sl[] / list of arguments */
246			)
247			{
248			static char *cmdstr;
249	schorsch	3.12	static size_t clen;
250	schorsch	3.1	char *newcs;
251	schorsch	3.12	size_t newlen, pos, i, res;
252	schorsch	3.1
253			newlen = strlen(cmdpath) + 3; /* allow two quotes plus the final \0 */
254			for (i = 0; sl[i] != NULL; i++) {
255			newlen += strlen(sl[i]) + 3; /* allow two quotes and a space */
256			}
257			if (cmdstr == NULL) {
258			cmdstr = (char *) malloc(newlen);
259			if (cmdstr == NULL) return NULL;
260			} else if (newlen > clen) {
261			newcs = (char *) realloc(cmdstr, newlen);
262			if (newcs == NULL) return NULL;
263			cmdstr = newcs;
264			}
265			clen = newlen;
266			pos = wordncopy(cmdstr, cmdpath, clen, 0, 1);
267			if (pos < 0) return NULL;
268			for (i = 0; sl[i] != NULL; i++) {
269			res = wordncopy(cmdstr + pos, sl[i], clen - pos, 1, 1);
270			if (res < 0) return NULL;
271			pos += res;
272			}
273			return cmdstr;
274			}
275
276
277			int
278			open_process(SUBPROC proc, char av[])
279			{
280			char *cmdpath;
281			char *cmdstr;
282
283	greg	3.14	if (av == NULL \|\| av[0] == NULL \|\| proc->flags) {
284	greg	3.8	fputs("Illegal call to open_process()!\n", stderr);
285			return -1;
286			}
287	greg	3.10	proc->pid = 0;
288	greg	3.7	if (av == NULL) { return -1; }
289	schorsch	3.1	cmdpath = getpath(av[0], getenv("PATH"), X_OK);
290	schorsch	3.6	cmdstr = quoted_cmdline(cmdpath, av+1);
291	schorsch	3.1	if (cmdstr == NULL) { return 0; }
292			return start_process(proc, cmdstr);
293			}
294
295
296	schorsch	3.5	int win_kill(RT_PID pid, int sig) /* we ignore sig... */
297			{
298			HANDLE hProc;
299
300			hProc = OpenProcess(SYNCHRONIZE\|PROCESS_TERMINATE, FALSE, pid);
301			/* it looks like we want to ignore errors here */
302			if(hProc != NULL) {
303			SafeTerminateProcess(hProc, 0);
304			CloseHandle(hProc);
305			}
306			return 0; /* XXX we need to figure out more here... */
307			}
308
309
310	schorsch	3.1	int
311	greg	3.10	close_processes(SUBPROC pd[], int nproc) {
312			int i, icres, ocres;
313	schorsch	3.1	DWORD pid;
314
315	greg	3.10	for (i = 0; i < nproc; i++) {
316	greg	3.14	if (pd[i].flags & PF_RUNNING) {
317	greg	3.10	ocres = close(pd[i].w);
318			icres = close(pd[i].r);
319	greg	3.14	pd[i].flags = 0;
320	greg	3.11	if(ocres != 0 \|\| icres != 0) {
321			/* something went wrong: enforce infanticide */
322	schorsch	3.13	/* other than that, it looks like we want to ignore errors */
323	greg	3.11	win_kill(pd[i].pid, 0);
324			}
325	greg	3.10	}
326			pd[i].pid = 0;
327	schorsch	3.1	}
328			return 0; /* XXX we need to figure out more here... */
329			}
330
331
332			#ifdef TEST_MODULE
333			int
334			main( int argc, char **argv )
335			{
336			SUBPROC proc;
337			FILE inf, outf;
338			int res;
339			char ret[1024];
340			char *command[]= {"word", "gappy word", "\"quoted words\"", "'squoted words'", NULL};
341
342	greg	3.14	proc.flags = 0;
343			proc.pid = 0;
344			res = open_process(&proc, command)
345	schorsch	3.1	if (res == 0) {
346			printf("open_process() failed with return value 0\n");
347			return -1;
348			}
349			printf("process opened with return value: %d, pid: %d, r: %d, w: %d\n",
350			res, proc.pid, proc.r, proc.w);
351			inf = fdopen(proc.r, "rb");
352			outf = fdopen(proc.w, "wb");
353			fprintf(outf,"0 0 0 0 1 0\n");
354			fflush(outf);
355			fgets(ret, sizeof(ret), inf);
356			printf("%s\n",ret);
357			close_process(&proc);
358			}
359			#endif
360