mirror of https://github.com/lianthony/NT4.0
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
262 lines
7.9 KiB
262 lines
7.9 KiB
/***
|
|
*dospawn.c - spawn a child process
|
|
*
|
|
* Copyright (c) 1989-1995, Microsoft Corporation. All rights reserved.
|
|
*
|
|
*Purpose:
|
|
* defines _dospawn - spawn a child process
|
|
*
|
|
*Revision History:
|
|
* 06-07-89 PHG Module created, based on asm version
|
|
* 03-08-90 GJF Made calling type _CALLTYPE2 (for now), added #include
|
|
* <cruntime.h> and fixed the copyright. Also, cleaned
|
|
* up the formatting a bit.
|
|
* 04-02-90 GJF Now _CALLTYPE1. Added const to type of name arg.
|
|
* 07-24-90 SBM Removed '32' from API names
|
|
* 09-27-90 GJF New-style function declarator.
|
|
* 10-30-90 GJF Added _p_overlay (temporary hack).
|
|
* 12-04-90 SRW Changed to include <oscalls.h> instead of <doscalls.h>
|
|
* 12-06-90 SRW Added _CRUISER_ and _WIN32 conditionals.
|
|
* 01-16-91 SRW Fixed return value for dospawn [_WIN32_]
|
|
* 01-17-91 GJF ANSI naming.
|
|
* 01-25-91 SRW Changed CreateProcess parameters [_WIN32_]
|
|
* 01-29-91 SRW Changed CreateProcess parameters again [_WIN32_]
|
|
* 02-05-91 SRW Changed to pass _osfile and _osfhnd arrays as binary
|
|
* data to child process. [_WIN32_]
|
|
* 02-18-91 SRW Fixed code to return correct process handle and close
|
|
* handle for P_WAIT case. [_WIN32_]
|
|
* 04-05-91 SRW Fixed code to free StartupInfo.lpReserved2 after
|
|
* CreateProcess call. [_WIN32_]
|
|
* 04-26-91 SRW Removed level 3 warnings (_WIN32_)
|
|
* 12-02-91 SRW Fixed command line setup code to not append an extra
|
|
* space [_WIN32_]
|
|
* 12-16-91 GJF Return full 32-bit exit code from the child process
|
|
* [_WIN32_].
|
|
* 02-14-92 GJF Replaced _nfile with _nhandle for Win32.
|
|
* 02-18-92 GJF Merged in 12-16-91 change from \\vangogh version
|
|
* 11-20-92 SKS errno/_doserrno must be 0 in case of success. This
|
|
* will distinguish a child process return code of -1L
|
|
* (errno == 0) from an actual error (where errno != 0).
|
|
* 01-08-93 CFW Added code to handle _P_DETACH case; add fdwCreate
|
|
* variable, nuke stdin, stdout, stderr entries of _osfile
|
|
* & _osfhnd tables, close process handle to completely
|
|
* detach process
|
|
* 04-06-93 SKS Replace _CRTAPI* with __cdecl
|
|
* 12-07-93 CFW Rip out Cruiser.
|
|
* 12-07-93 CFW Wide char enable, remove _p_overlay.
|
|
* 01-05-94 CFW Unremove _p_overlay.
|
|
* 01-10-95 CFW Debug CRT allocs.
|
|
* 06-12-95 GJF Revised passing of C file handles to work from the
|
|
* ioinfo arrays.
|
|
* 07-10-95 GJF Use UNALIGNED to avoid choking RISC platforms.
|
|
*
|
|
*******************************************************************************/
|
|
|
|
#include <cruntime.h>
|
|
#include <oscalls.h>
|
|
#include <internal.h>
|
|
#include <process.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <stdlib.h>
|
|
#include <tchar.h>
|
|
#include <dbgint.h>
|
|
|
|
#ifndef WPRFLAG
|
|
int _p_overlay = 2;
|
|
#endif
|
|
|
|
/***
|
|
*int _dospawn(mode, name, cmdblk, envblk) - spawn a child process
|
|
*
|
|
*Purpose:
|
|
* Spawns a child process
|
|
*
|
|
*Entry:
|
|
* int mode - _P_WAIT, _P_NOWAIT, _P_NOWAITO, _P_OVERLAY, or _P_DETACH
|
|
* _TSCHAR *name - name of program to execute
|
|
* _TSCHAR *cmdblk - parameter block
|
|
* _TSCHAR *envblk - environment block
|
|
*
|
|
*Exit:
|
|
* _P_OVERLAY: -1 = error, otherwise doesn't return
|
|
* _P_WAIT: termination code << 8 + result code
|
|
* _P_DETACH: -1 = error, 0 = success
|
|
* others: PID of process
|
|
*
|
|
*Exceptions:
|
|
*
|
|
*******************************************************************************/
|
|
|
|
#ifdef WPRFLAG
|
|
int __cdecl _wdospawn (
|
|
#else
|
|
int __cdecl _dospawn (
|
|
#endif
|
|
int mode,
|
|
const _TSCHAR *name,
|
|
_TSCHAR *cmdblk,
|
|
_TSCHAR *envblk
|
|
)
|
|
{
|
|
char syncexec, asyncresult, background;
|
|
LPTSTR CommandLine;
|
|
STARTUPINFO StartupInfo;
|
|
PROCESS_INFORMATION ProcessInformation;
|
|
BOOL CreateProcessStatus;
|
|
ULONG dosretval; /* OS return value */
|
|
DWORD retval;
|
|
DWORD fdwCreate = 0; /* flags for CreateProcess */
|
|
int i;
|
|
ioinfo *pio;
|
|
char *posfile;
|
|
UNALIGNED long *posfhnd;
|
|
int nh; /* number of file handles to be
|
|
passed to the child */
|
|
|
|
/* translate input mode value to individual flags */
|
|
syncexec = asyncresult = background = 0;
|
|
switch (mode) {
|
|
case _P_WAIT: syncexec=1; break; /* synchronous execution */
|
|
case 2: /* _P_OVERLAY */
|
|
case _P_NOWAITO: break; /* asynchronous execution */
|
|
case _P_NOWAIT: asyncresult=1; break; /* asynch + remember result */
|
|
case _P_DETACH: background=1; break; /* detached in null scrn grp */
|
|
default:
|
|
/* invalid mode */
|
|
errno = EINVAL;
|
|
_doserrno = 0; /* not a Dos error */
|
|
return -1;
|
|
}
|
|
|
|
//
|
|
// Loop over null separate arguments, and replace null separators
|
|
// with spaces to turn it back into a single null terminated
|
|
// command line.
|
|
//
|
|
CommandLine = cmdblk;
|
|
while (*cmdblk) {
|
|
while (*cmdblk) {
|
|
cmdblk++;
|
|
}
|
|
|
|
//
|
|
// If not last argument, turn null separator into a space.
|
|
//
|
|
if (cmdblk[1] != _T('\0')) {
|
|
*cmdblk++ = _T(' ');
|
|
}
|
|
}
|
|
|
|
memset(&StartupInfo,0,sizeof(StartupInfo));
|
|
StartupInfo.cb = sizeof(StartupInfo);
|
|
|
|
for ( nh = _nhandle ;
|
|
nh && !_osfile(nh - 1) ;
|
|
nh-- ) ;
|
|
|
|
StartupInfo.cbReserved2 = (WORD)(sizeof( int ) + (nh *
|
|
(sizeof( char ) + sizeof( long ))));
|
|
|
|
StartupInfo.lpReserved2 = _calloc_crt( StartupInfo.cbReserved2, 1 );
|
|
|
|
*((UNALIGNED int *)(StartupInfo.lpReserved2)) = nh;
|
|
|
|
posfile = (char *)(StartupInfo.lpReserved2 + sizeof( int ));
|
|
|
|
posfhnd = (UNALIGNED long *)(StartupInfo.lpReserved2 + sizeof( int ) +
|
|
(nh * sizeof( char )));
|
|
|
|
for ( i = 0,
|
|
posfile = (char *)(StartupInfo.lpReserved2 + sizeof( int )),
|
|
posfhnd = (UNALIGNED long *)(StartupInfo.lpReserved2 +
|
|
sizeof( int ) + (nh * sizeof( char ))) ;
|
|
i < nh ;
|
|
i++, posfile++, posfhnd++ )
|
|
{
|
|
pio = _pioinfo(i);
|
|
*posfile = pio->osfile;
|
|
*posfhnd = pio->osfhnd;
|
|
}
|
|
|
|
/*
|
|
* if the child process is detached, it cannot access the console, so
|
|
* we must nuke the information passed for the first three handles.
|
|
*/
|
|
if ( background ) {
|
|
|
|
for ( i = 0,
|
|
posfile = (char *)(StartupInfo.lpReserved2 + sizeof( int )),
|
|
posfhnd = (UNALIGNED long *)(StartupInfo.lpReserved2 + sizeof( int )
|
|
+ (nh * sizeof( char ))) ;
|
|
i < __min( nh, 3 ) ;
|
|
i++, posfile++, posfhnd++ )
|
|
{
|
|
*posfile = 0;
|
|
*posfhnd = (long)INVALID_HANDLE_VALUE;
|
|
}
|
|
|
|
fdwCreate |= DETACHED_PROCESS;
|
|
}
|
|
|
|
/**
|
|
* Set errno to 0 to distinguish a child process
|
|
* which returns -1L from an error in the spawning
|
|
* (which will set errno to something non-zero
|
|
**/
|
|
|
|
_doserrno = errno = 0 ;
|
|
|
|
#ifdef WPRFLAG
|
|
/* indicate to CreateProcess that environment block is wide */
|
|
fdwCreate |= CREATE_UNICODE_ENVIRONMENT;
|
|
#endif
|
|
|
|
CreateProcessStatus = CreateProcess( (LPTSTR)name,
|
|
CommandLine,
|
|
NULL,
|
|
NULL,
|
|
TRUE,
|
|
fdwCreate,
|
|
envblk,
|
|
NULL,
|
|
&StartupInfo,
|
|
&ProcessInformation
|
|
);
|
|
|
|
dosretval = GetLastError();
|
|
_free_crt( StartupInfo.lpReserved2 );
|
|
|
|
if (!CreateProcessStatus)
|
|
{
|
|
_dosmaperr(dosretval);
|
|
return -1;
|
|
}
|
|
|
|
if (mode == 2 /* _P_OVERLAY */) {
|
|
/* destroy ourselves */
|
|
_exit(0);
|
|
}
|
|
else if (mode == _P_WAIT) {
|
|
WaitForSingleObject(ProcessInformation.hProcess, (DWORD)(-1L));
|
|
|
|
/* return termination code and exit code -- note we return
|
|
the full exit code */
|
|
GetExitCodeProcess(ProcessInformation.hProcess, &retval);
|
|
|
|
CloseHandle(ProcessInformation.hProcess);
|
|
}
|
|
else if (mode == _P_DETACH) {
|
|
/* like totally detached asynchronous spawn, dude,
|
|
close process handle, return 0 for success */
|
|
CloseHandle(ProcessInformation.hProcess);
|
|
retval = (DWORD)0;
|
|
}
|
|
else {
|
|
/* asynchronous spawn -- return PID */
|
|
retval = (DWORD)ProcessInformation.hProcess;
|
|
}
|
|
|
|
CloseHandle(ProcessInformation.hThread);
|
|
return retval;
|
|
}
|