Hi,
In our environment, we have users that run persistent VNC sessions, and
on request through inetd. For ease of reminding, I like to give the
persistent users a low display number (e.g. 1-20). The problem is that a
new persistent user may have its display blocked by an inetd session.
Therefor I like to specify a display range that inetd can use. The
following patch allows an optional argument for inetd:
Xvnc -inetd 20-100; % uses displays 20-100
Xvnc -inetd; % uses the default 1-99
Greetings,
Sebastiaan
Ps: while testing incorrect input, I noticed that incorrect input is
ignored by default. E.g. Xvnc -screen -1 10x20x24 only gives a message
and the usage options, but runs Xvnc ignoring the incorrect argument.
--- ../../../../unix/xserver/hw/vnc/xvnc.cc 2011-02-21
16:05:15.000000000 +0100
+++ xvnc.cc 2011-03-03 13:58:06.209531786 +0100
@@ -289,7 +289,8 @@
ErrorF("-geometry WxH set screen 0's width, height\n");
ErrorF("-depth D set screen 0's depth\n");
ErrorF("-pixelformat fmt set pixel format (rgbNNN or
bgrNNN)\n");
- ErrorF("-inetd has been launched from inetd\n");
+ ErrorF("-inetd [Start-End] has been launched from inetd\n");
+ ErrorF(" Optionally, a display range can be
given.\n");
ErrorF("-interface IP_address listen on specified interface\n");
ErrorF("-noclipboard disable clipboard settings
modification via vncconfig utility\n");
ErrorF("\nVNC parameters:\n");
@@ -532,26 +533,43 @@
if (strcmp(argv[i], "-inetd") == 0)
{
+ /* Check for optional argument */
+ int DisplayStart=1, DisplayEnd=99;
+ int argsread = 1;
+
+ if ((i+1<argc) && (sscanf(argv[i+1],"%d-%d",&DisplayStart,
+ &DisplayEnd) == 2))
+ {
+ /* Display range argument was specified, check range */
+ if (DisplayStart<0 || DisplayStart>MAXSCREENS ||
DisplayEnd<0 || DisplayEnd > MAXSCREENS || DisplayStart>DisplayEnd)
+ {
+ ErrorF("Invalid inetd port range %s\n",
argv[i+1]);
+ UseMsg();
+ }
+ argsread = 2;
+ }
+
dup2(0,3);
vncInetdSock = 3;
close(2);
-
+
if (!displaySpecified) {
int port = network::TcpSocket::getSockPort(vncInetdSock);
int displayNum = port - 5900;
- if (displayNum < 0 || displayNum > 99 ||
!displayNumFree(displayNum)) {
- for (displayNum = 1; displayNum < 100; displayNum++)
+ if (displayNum < DisplayStart || displayNum > DisplayEnd ||
!displayNumFree(displayNum)) {
+ for (displayNum = DisplayStart; displayNum < DisplayEnd;
displayNum++)
if (displayNumFree(displayNum)) break;
- if (displayNum == 100)
+ if (displayNum == DisplayEnd+1)
FatalError("Xvnc error: no free display number for -inetd");
}
display = displayNumStr;
sprintf(displayNumStr, "%d", displayNum);
+
}
-
- return 1;
+ return argsread;
}
if (strcmp(argv[i], "-interface") == 0 ||
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