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;;;-*- Mode:Lisp; Syntax:Common-Lisp; Package:CHAOS -*-
;;;
;;; Copyright (c) 2000-2015, Toshimi Sawada. All rights reserved.
;;;
;;; Redistribution and use in source and binary forms, with or without
;;; modification, are permitted provided that the following conditions
;;; are met:
;;;
;;; * Redistributions of source code must retain the above copyright
;;; notice, this list of conditions and the following disclaimer.
;;;
;;; * Redistributions in binary form must reproduce the above
;;; copyright notice, this list of conditions and the following
;;; disclaimer in the documentation and/or other materials
;;; provided with the distribution.
;;;
;;; THIS SOFTWARE IS PROVIDED BY THE AUTHOR 'AS IS' AND ANY EXPRESSED
;;; OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
;;; WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
;;; ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
;;; DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
;;; DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
;;; GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
;;; INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
;;; WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
;;; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
;;; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;;;
(in-package :CHAOS)
#|==============================================================================
System: Chaos
Module: comlib
File: process.lisp
==============================================================================|#
#-:chaos-debug
(declaim (optimize (speed 3) (safety 0) #-GCL (debug 0)))
#+:chaos-debug
(declaim (optimize (speed 1) (safety 3) #-GCL (debug 3)))
;;; *NOTE* GCL Specific
;;; ************************************
;;; SPAWNING PROCESS WITH TOW-WAY STREAM
;;; ************************************
;;;
;;; The following C codes are borrowed from GCL run_process.c
;;; with some minor bug fixes including enhancements by ishisone@sra.co.jp.
;;;
(Clines "
#undef PAGESIZE
#include <errno.h> /* errno global, error codes for UNIX IO */
#include <sys/types.h> /* Data types definitions */
#include <sys/socket.h> /* Socket definitions with out this forget it */
#include <netinet/in.h> /* Internet address definition AF_INET etc... */
#include <signal.h> /* UNIX Signal codes */
#include <sys/ioctl.h> /* IO control standard UNIx fair */
#include <sys/file.h>
#include <fcntl.h> /* Function to set socket aync/interrupt */
#include <sys/time.h> /* Time for select time out */
#include <netdb.h> /* Data Base interface for network files */
/* patch by ishisone@sra.co.jp */
#include <sys/wait.h> /* Wait system call options */
/* patch end */
#include <stdio.h>
static char *lisp_to_string(string)
object string;
{
int i, len;
char *sself;
char *cstr;
len = string->st.st_fillp;
cstr = (char *) malloc (len+1);
sself = &(string->st.st_self[0]);
for (i=0; i<len; i++)
{
cstr[i] = sself[i];
}
cstr[i] = 0;
return (cstr);
}
/*
* make 2 two-way streams
*/
static object
make_pipe()
{
int sockets_in[2];
int sockets_out[2];
FILE *fp1, *fp2;
int pid;
object stream_in, stream_out, stream;
if (socketpair(AF_UNIX, SOCK_STREAM, 0, sockets_in) < 0)
FEerror(\"Failure to open socket stream pair\", 0);
if (socketpair(AF_UNIX, SOCK_STREAM, 0, sockets_out) < 0)
FEerror(\"Failure to open socket stream pair\", 0);
fp1 = fdopen(sockets_in[0], \"r\");
fp2 = fdopen(sockets_out[0], \"w\");
stream_in = (object) alloc_object(t_stream);
stream_in->sm.sm_mode = smm_input;
stream_in->sm.sm_fp = fp1;
stream_in->sm.sm_int0 = sockets_in[1];
stream_in->sm.sm_int1 = 0;
/* patch by sawada@sra.co.jp -- repairing printing problem */
stream_in->sm.sm_object0 = sLstring_char;
stream_in->sm.sm_object1 = Cnil;
/* end patch */
stream_out = (object) alloc_object(t_stream);
stream_out->sm.sm_mode = smm_output;
stream_out->sm.sm_fp = fp2;
setup_stream_buffer(stream_in);
setup_stream_buffer(stream_out);
stream_out->sm.sm_int0 = sockets_out[1];
stream_out->sm.sm_int1 = 0;
/* patch by sawada@sra.co.jp -- ditto */
stream_out->sm.sm_object0 = sLstring_char;
stream_out->sm.sm_object1 = Cnil;
/* patch end */
stream = make_two_way_stream(stream_in, stream_out);
return(stream);
}
/* the routines for spawning off a process with streams
*
* Assumes that istream and ostream are both associated
* with \"C\" type streams.
*/
static spawn_child(istream, ostream, pname, argv)
object istream;
object ostream;
char *pname;
char **argv;
{
int fdin;
int fdout;
if (istream->sm.sm_fp == NULL || ostream->sm.sm_fp == NULL)
FEerror(\"Cannot spawn process with given stream\", 0);
fdin = istream->sm.sm_int0;
fdout = ostream->sm.sm_int0;
if (fork() == 0)
{ /* the child --- replace standard in and out with descriptors given */
/* patch by ishisone@sra.co.jp */
setsid(); /* in order to get rid of job control */
fclose(istream->sm.sm_fp); /* close parent-side file desc. */
fclose(ostream->sm.sm_fp); /* ditto */
/* end patch */
close(0);
dup(fdin);
close(1);
dup(fdout);
if (execvp(pname, argv) == -1)
{
fprintf(stderr, \"\\n***** Error in process spawning *******\");
fflush(stderr);
exit(1);
}
}
/* patch by ishisone@sra.co.jp */
else
{ /* the parent */
close(fdin); /* close child-side file descriptor */
close(fdout); /* ditto */
}
/* end patch */
}
/*
#if defined(NeXT)
# define WAITPID(pid, statusp, options) \
wait3((union wait*)statusp, options, (struct rusage*)0)
#else
# define WAITPID(pid, statusp, options) \
waitpid(pid, statusp, options)
#endif
*/
/* patch by ishisone@sra.co.jp */
static reap_child()
{
/*
int dummy;
while (WAITPID(-1, &dummy, WNOHANG) > 0)
;
*/
}
/* end patch */
static run_child(file, arglist)
object file;
object arglist;
{
char *filename = object_to_string(file);
char *argv[100];
object stream;
int i;
/* patch by ishisone@sra.co.jp */
signal(SIGCHLD, reap_child);
/* end patch */
argv[0] = \"\";
for(i = 1; arglist != Cnil; i++) {
argv[i] = lisp_to_string(arglist->c.c_car);
arglist = arglist->c.c_cdr;
}
argv[i] = (char *)0;
stream = make_pipe();
spawn_child(stream->sm.sm_object1,
stream->sm.sm_object0,
filename, argv);
return(stream);
}
"
)
(defentry run-child (object object) (object run_child))
(defentry make-pipe () (object make_pipe))
;;;
;;;
(defstruct process
(name "" :type string :read-only t)
(in-stream)
(out-stream))
;;;
(defun run-process (program &optional args)
(let ((stream (run-child program args)))
(make-process :name program
:in-stream (si::fp-input-stream stream)
:out-stream (si::fp-output-stream stream))))
(defmacro with-write-to-process ((process) &body body)
` (let ((*standard-output* (process-out-stream ,process)))
,@body
(finish-output)))
(defmacro with-read-from-process ((process) &body body)
` (let ((*standard-input* (process-in-stream ,process)))
,@body
))
|
