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static char copyright[] = "Copyright 1990 by The MITRE Corporation.";
/* John D. Ramsdell - June 1990
*
* Copyright 1990 by The MITRE Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 1, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#import "startSlaveProcess.h"
#import <appkit/appkit.h>
#import <appkit/Application.h>
#import <appkit/defaults.h>
#import <stdio.h>
#import <stdlib.h>
#import <string.h>
#import <libc.h>
#import <dpsclient/dpsclient.h>
/* Creates a slave process and the pipes used to do the communication. */
static int pid;
static void processInHandler(int fd, void *userData)
{ /* Handles input from the slave process. */
static char buf[BUFSIZ + 1]; int n;
n = read(fd, buf, BUFSIZ);
if (n < 0) {
fprintf(stderr, "\nError in processIn reading %d bytes.\n", n);
perror ("input from pipe");
[NXApp terminate:((id) userData)];
}
else if (n == 0) [NXApp terminate:((id) userData)];
else {
char *textString;
textString = malloc(n + 1);
buf[n] = '\0';
[((EvalDelegate *) userData) showString:strcpy(textString, buf)];
}
}
int interruptSlaveProcess(void)
{
return kill(pid, SIGINT);
}
const char shellScript[] =
"if $0\n"
"then\n"
" exit 0\n"
"else\n"
" echo Slave exited with $?.\n"
" echo For slave command: $0.\n"
" echo\n"
" echo Starting a shell.\n"
" exec /bin/sh -i\n"
"fi\n"
"exit 1\n";
static void createProcess(int out[2])
{
int in[2]; const char *slaveCommand;
slaveCommand = NXGetDefaultValue("Twin", "SlaveCommand");
if (slaveCommand == NULL) slaveCommand = "# Could not get default";
if (-1 == pipe (in)) perror("Pipe error");
if (-1 == pipe (out)) perror ("Pipe error");
if (0 == (pid = fork())) {
close (0);
close (1);
if (0 != dup (in[0])) perror("dup error");
if (1 != dup (out[1])) perror("dup error");
close (2);
if (2 != dup (1)) exit(1);
close (in[0]); close (in[1]); close (out[0]); close (out[1]);
#if defined DEBUG
write (2, shellScript, strlen(shellScript)); /* show script. */
write (2, slaveCommand, strlen(slaveCommand));
write (2, "\n\n", 2);
#endif
execl("/bin/sh", "-sh", "-c", shellScript, slaveCommand, NULL);
exit(1);
}
close (in[0]); close (out[1]);
out[1] = in[1];
}
FILE *startSlaveProcess(EvalDelegate *evalDelegate)
{ /* Creates the slave process, */
int fildes[2]; /* adds processInHandler to handle */
createProcess(fildes); /* data from the slave, and returns */
DPSAddFD(fildes[0], processInHandler, /* the file pointer used to */
(void *)evalDelegate, NX_RUNMODALTHRESHOLD); /* send */
return fdopen(fildes[1], "a"); /* data to the slave process. */
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.