fix some non-gcc compiler warnings and signals in x11vnc

ChangeLog

+2006-02-20  Karl Runge <runge@karlrunge.com>
+	* main.c, cursor.c, tightvnc-filetransfer: fix some non-gcc
+	  compiler warnings.
+
 2006-01-14  Karl Runge <runge@karlrunge.com>
 	* x11vnc: add -8to24 option for some multi-depth displays.
 

configure.ac

 # Process this file with autoconf to produce a configure script.
-AC_INIT(LibVNCServer, 0.8pre, http://sourceforge.net/projects/libvncserver)
-AM_INIT_AUTOMAKE(LibVNCServer, 0.8pre)
+AC_INIT(LibVNCServer, 0.9pre, http://sourceforge.net/projects/libvncserver)
+AM_INIT_AUTOMAKE(LibVNCServer, 0.9pre)
 AM_CONFIG_HEADER(rfbconfig.h)
 AX_PREFIX_CONFIG_H([rfb/rfbconfig.h])
 

libvncserver/cursor.c

@@ -341,7 +341,7 @@ char* rfbMakeMaskFromAlphaSource(int width,int height,unsigned char* alphaSource
 			}
 		}
 	free(error);
-	return result;
+	return (char *) result;
 }
 
 void rfbFreeCursor(rfbCursorPtr cursor)

libvncserver/main.c

@@ -400,6 +400,7 @@ clientOutput(void *data)
 	sraRgnDestroy(updateRegion);
     }
 
+    /* Not reached. */
     return NULL;
 }
 

libvncserver/tightvnc-filetransfer/filelistinfo.c

@@ -42,6 +42,9 @@ DisplayFileList(FileListInfo fli)
     rfbLog("DISPLAYING FILE NAMES IN THE LIST ...END\n\n");
 }
 
+#ifndef __GNUC__
+#define __FUNCTION__ "unknown"
+#endif
 
 int 
 AddFileListItemInfo(FileListInfoPtr fileListInfoPtr, char* name, 

libvncserver/tightvnc-filetransfer/filetransfermsg.c

@@ -100,6 +100,9 @@ GetFileListResponseMsg(char* path, char flags)
 	return fileListMsg;
 }
 
+#ifndef __GNUC__
+#define __FUNCTION__ "unknown"
+#endif
 
 int
 CreateFileListInfo(FileListInfoPtr pFileListInfo, char* path, int flag)

libvncserver/tightvnc-filetransfer/handlefiletransferrequest.c

@@ -84,6 +84,9 @@ InitFileTransfer()
 	fileTransferInitted = TRUE;
 }
 
+#ifndef __GNUC__
+#define __FUNCTION__ "unknown"
+#endif
 
 /*
  *  This method is called from InitFileTransfer method and

prepare_x11vnc_dist.sh

 #!/bin/bash
 
-VERSION="0.8"
+VERSION="0.8.1"
 
 cd "$(dirname "$0")"
 

x11vnc/ChangeLog

+2006-02-20  Karl Runge <runge@karlrunge.com>
+	* x11vnc: add SIGINT SIGQUIT handling for run_user_command(),
+	  set some signal handlers to SIG_DLF for forked children, 
+	  put a timeout on port 113 connection to viewer machine.
+
 2006-02-06  Karl Runge <runge@karlrunge.com>
 	* x11vnc: fix AIX build wrt h_errno.
 

x11vnc/connections.c

@@ -431,15 +431,39 @@ static int run_user_command(char *cmd, rfbClientPtr client, char *mode) {
 #if LIBVNCSERVER_HAVE_FORK
 	{
 		pid_t pid, pidw;
-		if ((pid = fork()) > 0) {
-			pidw = waitpid(pid, &rc, 0);
-		} else if (pid == -1) {
-			fprintf(stderr, "could not fork\n");
-			rfbLogPerror("fork");
-			rc = system(cmd);
+		struct sigaction sa, intr, quit;
+		sigset_t omask;
+
+		sa.sa_handler = SIG_IGN;
+		sa.sa_flags = 0;
+		sigemptyset(&sa.sa_mask);
+		sigaction(SIGINT,  &sa, &intr);
+		sigaction(SIGQUIT, &sa, &quit);
+
+		sigaddset(&sa.sa_mask, SIGCHLD);
+		sigprocmask(SIG_BLOCK, &sa.sa_mask, &omask);
+
+		if ((pid = fork()) > 0 || pid == -1) {
+
+			if (pid != -1) {
+				pidw = waitpid(pid, &rc, 0);
+			}
+
+			sigaction(SIGINT,  &intr, (struct sigaction *) NULL);
+			sigaction(SIGQUIT, &quit, (struct sigaction *) NULL);
+			sigprocmask(SIG_SETMASK, &omask, (sigset_t *) NULL);
+
+			if (pid == -1) {
+				fprintf(stderr, "could not fork\n");
+				rfbLogPerror("fork");
+				rc = system(cmd);
+			}
 		} else {
 			/* this should close port 5900, etc.. */
 			int fd;
+			sigaction(SIGINT,  &intr, (struct sigaction *) NULL);
+			sigaction(SIGQUIT, &quit, (struct sigaction *) NULL);
+			sigprocmask(SIG_SETMASK, &omask, (sigset_t *) NULL);
 			for (fd=3; fd<256; fd++) {
 				close(fd);
 			}

x11vnc/inet.c

@@ -177,8 +177,47 @@ char *ident_username(rfbClientPtr client) {
 	if (!user || *user == '\0') {
 		char msg[128];
 		int n, sock, ok = 0;
-
-		if ((sock = rfbConnectToTcpAddr(client->host, 113)) < 0) {
+		int block = 0;
+
+		/*
+		 * need to check to see if the operation will block for
+		 * a long time: a firewall may just ignore our packets.
+		 */
+#if LIBVNCSERVER_HAVE_FORK
+	    {	pid_t pid, pidw;
+		int rc;
+		if ((pid = fork()) > 0) {
+			usleep(100 * 1000);	/* 0.1 sec */
+			pidw = waitpid(pid, &rc, WNOHANG);
+			if (pidw <= 0) {
+				usleep(1000 * 1000);	/* 1.0 sec */
+				pidw = waitpid(pid, &rc, WNOHANG);
+				if (pidw <= 0) {
+					block = 1;
+					kill(pid, SIGTERM);
+				}
+			}
+		} else if (pid == -1) {
+			;
+		} else {
+			/* child */
+			signal(SIGHUP,  SIG_DFL);
+			signal(SIGINT,  SIG_DFL);
+			signal(SIGQUIT, SIG_DFL);
+			signal(SIGTERM, SIG_DFL);
+
+			if ((sock = rfbConnectToTcpAddr(client->host, 113)) < 0) {
+				exit(1);
+			} else {
+				close(sock);
+				exit(0);
+			}
+		}
+	    }
+#endif
+		if (block) {
+			;
+		} else if ((sock = rfbConnectToTcpAddr(client->host, 113)) < 0) {
 			rfbLog("could not connect to ident: %s:%d\n",
 			    client->host, 113);
 		} else {

x11vnc/user.c

@@ -557,6 +557,11 @@ static int try_user_and_display(uid_t uid, char *dpystr) {
 		Display *dpy2 = NULL;
 		int rc;
 
+		signal(SIGHUP,  SIG_DFL);
+		signal(SIGINT,  SIG_DFL);
+		signal(SIGQUIT, SIG_DFL);
+		signal(SIGTERM, SIG_DFL);
+
 		rc = switch_user_env(uid, name, home, 0); 
 		if (! rc) {
 			exit(1);

x11vnc/x11vnc.1

@@ -2,7 +2,7 @@
 .TH X11VNC "1" "February 2006" "x11vnc " "User Commands"
 .SH NAME
 x11vnc - allow VNC connections to real X11 displays
-         version: 0.8, lastmod: 2006-02-06
+         version: 0.8.1, lastmod: 2006-02-20
 .SH SYNOPSIS
 .B x11vnc
 [OPTION]...

x11vnc/x11vnc_defs.c

@@ -15,7 +15,7 @@ int xtrap_base_event_type = 0;
 int xdamage_base_event_type = 0;
 
 /*               date +'lastmod: %Y-%m-%d' */
-char lastmod[] = "0.8 lastmod: 2006-02-06";
+char lastmod[] = "0.8.1 lastmod: 2006-02-20";
 
 /* X display info */
 

x11vnc/xevents.c

@@ -473,6 +473,11 @@ void spawn_grab_buster(void) {
 		fprintf(stderr, "spawn_grab_buster: could not fork\n");
 		rfbLogPerror("fork");
 	} else {
+		signal(SIGHUP,  SIG_DFL);
+		signal(SIGINT,  SIG_DFL);
+		signal(SIGQUIT, SIG_DFL);
+		signal(SIGTERM, SIG_DFL);
+
 		grab_buster_watch(parent, dstr);
 		exit(0);
 	}