static int execvp_win32(const char *prog, char **argv)
{
int ret = spawnvp(P_NOWAIT, prog, (const char *const*)argv);
if (-1 == ret)
return ret;
cwait(&ret, ret, WAIT_CHILD);
exit(ret);
}
void main()
{
int process_id;
int status;
process_id = spawnl( P_NOWAIT, "child.exe",
"child", "parm", NULL );
cwait( &status, process_id, WAIT_CHILD );
}
/* wait waits for a process started by fork_exec.
* In general, this is called after the complete IO to the called process but
* it isn't guaranteed. Never call if you don't expect a sudden death of the
* subprocess.
* Returns the exit status of the subprocess under normal circumstances. If
* the subprocess has died by a signal, the return value is -signalnumber.
*/
static int Os2_wait(int process)
{
int rc, retval, status;
#ifdef __WATCOMC__
/*
* Watcom is strange. EINTR isn't an indicator for a retry of the call.
*/
status = -1;
rc = cwait(&status, process, WAIT_CHILD);
if (rc == -1)
{
if ((status != -1) && (errno == EINTR))
retval = -status; /* Exception reason in lower byte */
else
retval = -errno; /* I don't have a better idea */
}
else
{
if (status & 0xFF)
retval = -status; /* Exception reason in lower byte */
else
retval = status >> 8;
}
#else
do {
rc = waitpid(process, &status, 0);
} while ((rc == -1) && (errno == EINTR));
if (WIFEXITED(status))
{
retval = (int) WEXITSTATUS(status);
if ( retval < 0 )
retval = -retval;
}
else if (WIFSIGNALED(status))
{
retval = -WTERMSIG(status);
if ( retval > 0 )
retval = -retval;
else if ( retval == 0 )
retval = -1;
}
else
{
retval = -WSTOPSIG(status);
if ( retval > 0 )
retval = -retval;
else if ( retval == 0 )
retval = -1;
}
#endif
return(retval);
}
/* npflush is called for filter ops effected with temp files */
void
npflush(void)
{
char buf[NFILEN + 128];
int rc, term_status;
/*
* caller has filled and closed the write pipe data stream. time to
* exec a process.
*/
if ((stdout_fd = open(stdout_name, O_RDONLY|O_BINARY)) == BAD_FD)
{
/* oh my, put complaint in user's face. */
sprintf(buf, "[unable to open temp file \"%s\": %s]",
stdout_name,
strerror(errno));
lastditch_msg(buf);
}
else
{
/* handles[1-2] were initialized by tmp_npopen_open() */
handles[0] = (HANDLE) _get_osfhandle(stdout_fd);
rc = (exec_shell(shcmd,
handles,
TRUE /* do hide child window */
) == BAD_PROC_HANDLE) ? FALSE : TRUE;
if (! rc)
{
/* Shell process failed, put complaint in user's face. */
sprintf(buf, SHELL_ERR_MSG, get_shell());
lastditch_msg(buf);
}
else
{
/* now wait for app to exit */
(void) cwait(&term_status, (CWAIT_PARAM_TYPE) proc_handle, 0);
TRACE(("...CreateProcess finished waiting in npflush\n"));
close_proc_handle();
}
/*
* When closing descriptors shared between parent and child, order
* is quite important when $shell == command.com . In this
* situation, the descriptors can't be closed until the exec'd
* process exits.
*/
close_fd(stdout_fd);
}
}
int Process::join(int pid)
{
int status, result;
if(pid == -1)
return pid;
result = (int)cwait(&status, pid, WAIT_CHILD);
if(status & 0x0)
return -1;
return result;
}
static void
native_npclose(FILE *fp)
{
int term_status;
(void) fflush(fp);
(void) fclose(fp);
if (proc_handle != BAD_PROC_HANDLE)
{
(void) cwait(&term_status, (CWAIT_PARAM_TYPE) proc_handle, 0);
TRACE(("...CreateProcess finished waiting in native_npclose\n"));
close_proc_handle();
}
common_cleanup();
}
static void
tmp_npclose(FILE *fp)
{
char buf[NFILEN + 128];
int rc, term_status;
(void) fflush(fp);
(void) fclose(fp);
if (stdout_fd != BAD_FD)
{
/*
* write pipe, but not a filter. Editor has written data to temp
* file, time now to exec "cmd" and hook its stdin to the file.
*
* It should be noted that exec'ing a process in the npclose()
* phase of a write pipe is not exactly keeping in spirit with
* the control flow in file.c :-) . However, the strategy used
* here ensures that the launched process reads a temp file that
* is completey flushed to disk. The only direct drawback with
* this approach is that when the exec'd process exits, the user
* does not receive a "[press return to continue]" prompt from
* file.c . But, cough, we can work around that problem :-) .
*/
if ((stdout_fd = open(stdout_name, O_RDONLY|O_BINARY)) == BAD_FD)
{
/* oh my, put complaint in user's face. */
sprintf(buf, "[unable to open temp file \"%s\": %s]",
stdout_name,
strerror(errno));
lastditch_msg(buf);
}
else
{
handles[0] = (HANDLE) _get_osfhandle(stdout_fd);
handles[1] = handles[2] = GetStdHandle(STD_OUTPUT_HANDLE);
rc = (exec_shell(shcmd,
handles,
FALSE /* don't hide child window */
) == BAD_PROC_HANDLE) ? FALSE : TRUE;
if (! rc)
{
/* Shell process failed, put complaint in user's face. */
sprintf(buf, SHELL_ERR_MSG, get_shell());
lastditch_msg(buf);
}
else
{
/* now wait for app to exit */
(void) cwait(&term_status, (CWAIT_PARAM_TYPE) proc_handle, 0);
TRACE(("...CreateProcess finished waiting in tmp_npclose\n"));
close_proc_handle();
}
/*
* When closing descriptors shared between parent and child,
* order is quite important when $shell == command.com . In
* this situation, the descriptors can't be closed until the
* exec'd process exits.
*/
close_fd(stdout_fd);
}
pressreturn(); /* cough */
sgarbf = TRUE;
}
tmp_cleanup();
}
static int
tmp_inout_popen(FILE **fr, FILE **fw, char *cmd)
{
char buf[NFILEN + 128];
DWORD dummy, len;
int rc, term_status, tmpin_fd;
TRACE(("tmp_inout_popen cmd=%s\n", cmd));
proc_handle = BAD_PROC_HANDLE;
handles[0] = handles[1] = handles[2] = INVALID_HANDLE_VALUE;
tmpin_fd = stdin_fd = stdout_fd = BAD_FD;
tmpin_name = stdin_name = stdout_name = NULL;
set_console_title(cmd);
do
{
if (fr)
{
*fr = NULL;
if ((stdin_name = _tempnam(getenv("TEMP"), "vile")) == NULL)
break;
if ((stdin_fd = open(stdin_name,
O_RDWR|O_CREAT|O_TRUNC|O_TEXT,
_S_IWRITE|_S_IREAD)) == BAD_FD)
{
break;
}
handles[2] = handles[1] = (HANDLE) _get_osfhandle(stdin_fd);
if (! fw)
{
/*
* This is a read pipe (only). Connect child's stdin to
* an empty file. Under no circumstances should the
* child's stdin be connected to a device (else lots of
* screwy things will occur). In particular, connecting
* the child's stdin to the parent's stdin will cause
* aborts and hangs on the various Win32 hosts. You've
* been warned.
*/
if ((tmpin_name = _tempnam(getenv("TEMP"), "vile")) == NULL)
break;
if ((tmpin_fd = open(tmpin_name,
O_RDONLY|O_CREAT|O_TRUNC,
_S_IWRITE|_S_IREAD)) == BAD_FD)
{
break;
}
handles[0] = (HANDLE) _get_osfhandle(tmpin_fd);
}
else
{
/*
* Set up descriptor for filter operation. Note the
* sublteties here: exec'd shell is passed a descriptor
* to the temp file that's opened "w". The editor
* receives a descriptor to the file that's opened "r".
*/
if ((*fr = fopen(stdin_name, "r")) == NULL)
break;
}
}
if (fw)
{
*fw = NULL;
/* create a temp file to receive data from the editor */
if ((stdout_name = _tempnam(getenv("TEMP"), "vile")) == NULL)
break;
if ((stdout_fd = open(stdout_name,
O_RDWR|O_CREAT|O_TRUNC|O_BINARY,
_S_IWRITE|_S_IREAD)) == BAD_FD)
{
break;
}
if ((*fw = fdopen(stdout_fd, "w")) == 0)
break;
/*
* we're all set up, but can't exec "cmd" until the editor
* writes data to the temp file connected to stdout.
*/
shcmd = cmd; /* remember this */
return (TRUE);
}
/* This must be a read (only) pipe. Appropriate to exec "cmd". */
rc = (exec_shell(cmd,
handles,
TRUE /* hide child wdw */
) == BAD_PROC_HANDLE) ? FALSE : TRUE;
if (! rc)
{
/*
* Shell process failed, put complaint in user's buffer, which
* is currently proxied by a temp file that the editor will
* suck in shortly.
*/
len = (DWORD) (lsprintf(buf, SHELL_ERR_MSG, get_shell()) - buf);
(void) WriteFile(handles[1], buf, len, &dummy, NULL);
FlushFileBuffers(handles[1]);
}
else
{
/* wait for exec'd process to exit */
(void) cwait(&term_status, (CWAIT_PARAM_TYPE) proc_handle, 0);
TRACE(("...CreateProcess finished waiting in tmp_inout_popen\n"));
close_proc_handle();
}
/*
* When closing descriptors shared between parent and child, order
* is quite important when $shell == command.com . In this
* situation, the descriptors can't be closed until the exec'd
* process exits (I kid you not).
*/
close_fd(stdin_fd);
(void) close(tmpin_fd);
/* let the editor consume the output of the read pipe */
if ((*fr = fopen(stdin_name, "r")) == NULL)
{
/*
* impossible to put error in user's buffer since that file
* descriptor is closed.
*/
sprintf(buf,
"[error opening temp file \"%s\": %s]",
stdin_name,
strerror(errno));
lastditch_msg(buf);
break;
}
return (rc);
}
while (FALSE);
/* If we get here -- some operation has failed. Clean up. */
tmp_cleanup();
return (FALSE);
}
int hb_fsProcessValue( HB_FHANDLE hProcess, HB_BOOL fWait )
{
int iRetStatus = -1;
HB_TRACE( HB_TR_DEBUG, ( "hb_fsProcessValue(%p, %d)", ( void * ) ( HB_PTRDIFF ) hProcess, fWait ) );
#if defined( HB_OS_WIN )
{
HB_BOOL fError = HB_TRUE;
DWORD dwResult;
HANDLE hProc = ( HANDLE ) hb_fsGetOsHandle( hProcess );
if( hProc )
{
hb_vmUnlock();
dwResult = WaitForSingleObject( hProc, fWait ? INFINITE : 0 );
if( dwResult == WAIT_OBJECT_0 )
{
fError = ! GetExitCodeProcess( hProc, &dwResult );
iRetStatus = ! fError ? ( int ) dwResult : -2;
}
hb_fsSetIOError( ! fError, 0 );
if( ! fError )
CloseHandle( hProc );
hb_vmLock();
}
else
hb_fsSetError( ( HB_ERRCODE ) FS_ERROR );
}
#elif defined( HB_OS_UNIX ) || ( defined( HB_OS_OS2 ) && defined( __GNUC__ ) )
{
int iStatus;
pid_t pid = ( pid_t ) hProcess;
if( pid > 0 )
{
hb_vmUnlock();
iRetStatus = waitpid( pid, &iStatus, fWait ? 0 : WNOHANG );
hb_fsSetIOError( iRetStatus >= 0, 0 );
#ifdef ERESTARTSYS
if( iRetStatus < 0 && hb_fsOsError() != ( HB_ERRCODE ) ERESTARTSYS )
#else
if( iRetStatus < 0 )
#endif
iRetStatus = -2;
else if( iRetStatus == 0 )
iRetStatus = -1;
else
iRetStatus = WIFEXITED( iStatus ) ? WEXITSTATUS( iStatus ) : 0;
hb_vmLock();
}
else
hb_fsSetError( ( HB_ERRCODE ) FS_ERROR );
}
#elif defined( HB_OS_OS2 )
{
PID pid = ( PID ) hProcess;
if( pid > 0 )
{
RESULTCODES resultCodes = { 0, 0 };
APIRET ret;
ret = DosWaitChild( DCWA_PROCESS, fWait ? DCWW_WAIT : DCWW_NOWAIT,
&resultCodes, &pid, pid );
hb_fsSetIOError( ret == NO_ERROR, 0 );
if( ret == NO_ERROR )
iRetStatus = resultCodes.codeResult;
else
iRetStatus = -2;
}
else
hb_fsSetError( ( HB_ERRCODE ) FS_ERROR );
}
#elif defined( HB_OS_OS2 ) || defined( HB_OS_WIN )
{
int iPid = ( int ) hProcess;
HB_SYMBOL_UNUSED( fWait );
if( iPid > 0 )
{
hb_vmUnlock();
#if defined( __BORLANDC__ )
iPid = cwait( &iRetStatus, iPid, 0 );
#else
iPid = _cwait( &iRetStatus, iPid, 0 );
#endif
hb_fsSetIOError( iPid > 0, 0 );
if( iPid != ( int ) hProcess )
iRetStatus = -1;
hb_vmLock();
}
else
hb_fsSetError( ( HB_ERRCODE ) FS_ERROR );
}
#else
{
int iTODO; /* TODO: for given platform */
HB_SYMBOL_UNUSED( hProcess );
HB_SYMBOL_UNUSED( fWait );
hb_fsSetError( ( HB_ERRCODE ) FS_ERROR );
}
#endif
return iRetStatus;
}
_WCRTLINK int wait( int *status )
{
return( cwait( status, 0, 0 ) );
}