1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
/*
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
*/
/* $XFree86: xc/lib/dps/csstartNX.c,v 1.6 2001/10/28 03:32:43 tsi Exp $ */
#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 */
#include "dpsassert.h"
#include "csfindNX.h"
#include "csstartNX.h"
/* ---Defines--- */
#include <stddef.h>
#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(void)
{
struct sockaddr_in insock;
int request;
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 *) 0)) != 0)
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(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(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 == 0) return (!Success);
/* Create the argv list for the execl() call */
(void) XDPSGetNXArg(XDPSNX_EXEC_ARGS, (void **) &execArgs);
if (execArgs != 0)
for(cpp = execArgs; *cpp != 0; cpp++, argc++); /* count args. */
if (additionalArgs != 0) /* add on the add-on args. */
for(cpp = additionalArgs; *cpp != 0; cpp++, argc++);
args = (char **) Xmalloc(sizeof(char *) * (argc+1));
if (args == 0)
return(!Success);
args[argc] = 0; /* cap end of args */
args[i++] = execObj;
if (additionalArgs != 0)
for(cpp = additionalArgs; *cpp != 0; cpp++, i++) args[i] = *cpp;
if (execArgs != 0)
for(cpp = execArgs; *cpp != 0; cpp++, i++) args[i] = *cpp;
/* now try to start up the agent... */
if ((childPid = fork()) != -1) {
if (childPid == 0) { /* Child process */
#ifndef __UNIXOS2__
if (setsid() < 0)
DPSWarnProc(NULL, "Agent unable to create session. Continuing...\n");
#endif
/* 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 != 0) (void) XFree(args);
return(status);
}
|
