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/*
csstartNX.c
* (c) Copyright 1992-1994 Adobe Systems Incorporated.
* All rights reserved.
*
* Permission to use, copy, modify, distribute, and sublicense this software
* and its documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notices appear in all copies and that
* both those copyright notices and this permission notice appear in
* supporting documentation and that the name of Adobe Systems Incorporated
* not be used in advertising or publicity pertaining to distribution of the
* software without specific, written prior permission. No trademark license
* to use the Adobe trademarks is hereby granted. If the Adobe trademark
* "Display PostScript"(tm) is used to describe this software, its
* functionality or for any other purpose, such use shall be limited to a
* statement that this software works in conjunction with the Display
* PostScript system. Proper trademark attribution to reflect Adobe's
* ownership of the trademark shall be given whenever any such reference to
* the Display PostScript system is made.
*
* ADOBE MAKES NO REPRESENTATIONS ABOUT THE SUITABILITY OF THE SOFTWARE FOR
* ANY PURPOSE. IT IS PROVIDED "AS IS" WITHOUT EXPRESS OR IMPLIED WARRANTY.
* ADOBE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NON- INFRINGEMENT OF THIRD PARTY RIGHTS. IN NO EVENT SHALL ADOBE BE LIABLE
* TO YOU OR ANY OTHER PARTY FOR ANY SPECIAL, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE, STRICT LIABILITY OR ANY OTHER ACTION ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. ADOBE WILL NOT
* PROVIDE ANY TRAINING OR OTHER SUPPORT FOR THE SOFTWARE.
*
* Adobe, PostScript, and Display PostScript are trademarks of Adobe Systems
* Incorporated which may be registered in certain jurisdictions
*
* Author: Adobe Systems Incorporated
*/
#include <sys/param.h>
#include <X11/X.h>
#include <X11/Xlibint.h>
#include <sys/wait.h>
#include <DPS/dpsNXargs.h>
#include <sys/socket.h>
#include <errno.h>
#include <X11/Xos.h>
#include "DPSCAPproto.h"
#include "Xlibnet.h" /* New for R5, delete for R4 */
/* ---Defines--- */
#ifndef NULL
#define NULL (void *) 0
#endif
#define DOZETIME 1 /* time to wait for agent to start up (sec) */
#define BASE_TCP_PORT CSDPSPORT
#ifndef CSDPSMAXPORT
#define CSDPSMAXPORT 16
#endif
#ifndef SO_REUSEADDR
#define SO_REUSEADDR 1
#endif
/* ---Globals--- */
pid_t gSecretAgentPID = 0; /* PID of launched agent *Shh!* Not public! */
/* ---Private Functions--- */
static int
TryTCP()
{
struct sockaddr_in insock;
int request;
int retry;
unsigned short port, startPort = 0;
struct servent *serventInfo;
int okay;
#ifndef ultrix
/* Ultrix has a nasty bug in getservbyname(). If the name passed
to it doesn't exist in the services list it will seg. fault...
* sigh * */
if ((serventInfo = getservbyname(DPS_NX_SERV_NAME,
(char *) NULL)) != NULL)
if (strcmp("tcp", serventInfo->s_proto) == 0) {
startPort = ntohs(serventInfo->s_port);
}
/* So, for Ultrix we just default to the default default port :-) */
#endif /* ultrix */
if (startPort == 0) startPort = BASE_TCP_PORT;
if ((request = socket (AF_INET, SOCK_STREAM, 0)) < 0)
{
DPSWarnProc(NULL, "Creating TCP socket while recommending port\n");
return -1;
}
#ifdef SO_REUSEADDR
/* Necesary to restart the server without a reboot */
{
int one = 1;
setsockopt(request, SOL_SOCKET, SO_REUSEADDR, (char *)&one, sizeof(int));
}
/* What the hell is all this? I'll tell you. We don't know
a prioi what port is free, so we try to bind to each
in sequence and return the one that works. */
#if !defined(AIXV3)
{
struct linger lingere;
lingere.l_onoff = 0; /* off */
lingere.l_linger = 0; /* don't */
if(setsockopt(request, SOL_SOCKET, SO_LINGER, (char *)&lingere,
sizeof(struct linger)) != 0)
DPSWarnProc(NULL,
"Couldn't set TCP SO_DONTLINGER while recommending port.");
}
#endif /* AIXV3 */
#endif /* SO_REUSEADDR */
bzero((char *)&insock, sizeof (insock));
insock.sin_family = AF_INET;
insock.sin_addr.s_addr = htonl(INADDR_ANY);
okay = 0;
for (port = startPort; (int) port < (int) startPort + CSDPSMAXPORT; port++)
{
int result;
insock.sin_port = htons(port);
errno = 0;
result = bind(request, (struct sockaddr *) &insock, sizeof (insock));
if (result < 0)
{
if (errno != EADDRINUSE)
{
DPSWarnProc(NULL, "Binding TCP socket while recommending port.\n");
close(request);
return -1;
}
continue;
}
else
{
/* We have a good port number */
okay = 1;
break;
}
}
close(request);
return (okay) ? port : -1;
}
/* ---Functions--- */
int
XDPSNXRecommendPort(transport)
int transport;
{
int ret;
switch (transport)
{
case XDPSNX_TRANS_UNIX:
/* If the TCP socket exists, we just assume the UNIX one
is there too. FALL THRU! */
case XDPSNX_TRANS_TCP: /* TCP */
ret = TryTCP();
break;
default: ret = -1;
}
return(ret);
}
int
StartXDPSNX(additionalArgs)
char **additionalArgs;
{
char **args, **cpp;
pid_t childPid;
int argc = 1; /* 1, args[0]:=path, args[1]:=null */
int i = 0;
int status = Success; /* assume we'll succeed */
char *execObj, **execArgs;
(void) XDPSGetNXArg(XDPSNX_EXEC_FILE, (void **) &execObj);
if (execObj == NULL) return (!Success);
/* Create the argv list for the execl() call */
(void) XDPSGetNXArg(XDPSNX_EXEC_ARGS, (void **) &execArgs);
if (execArgs != NULL)
for(cpp = execArgs; *cpp != NULL; cpp++, argc++); /* count args. */
if (additionalArgs != NULL) /* add on the add-on args. */
for(cpp = additionalArgs; *cpp != NULL; cpp++, argc++);
args = (char **) Xmalloc(sizeof(char *) * (argc+1));
if (args == NULL)
return(!Success);
args[argc] = NULL; /* cap end of args */
args[i++] = execObj;
if (additionalArgs != NULL)
for(cpp = additionalArgs; *cpp != NULL; cpp++, i++) args[i] = *cpp;
if (execArgs != NULL)
for(cpp = execArgs; *cpp != NULL; cpp++, i++) args[i] = *cpp;
/* now try to start up the agent... */
if ((childPid = fork()) != -1) {
if (childPid == 0) { /* Child process */
if (setsid() < 0)
DPSWarnProc(NULL, "Agent unable to create session. Continuing...\n");
/* Try to start the agent */
if (execvp(args[0], args) < 0) { /* Error!! */
exit(1); /* This is OKAY, we're the child here */
}
/* SHOULD NEVER REACH HERE */
} else { /* Parent (NX Client) */
(void) sleep(DOZETIME);
/* if decmips, pray that we hesitate long enough for the child... */
/* Check on child (NX Agent) */
if (waitpid(childPid, NULL, WNOHANG) != 0) {
/* Server terminated or stopped; don't care, result is same... */
status = !Success;
} else { /* we think the agent started okay */
gSecretAgentPID = childPid; /* set secret global */
}
}
} else { /* Error in fork */
status = !Success;
}
if (args != NULL) (void) XFree(args);
return(status);
}
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